Solidity Jobs

Senior Software Engineer, Data Products

Chainlink Labs

1 day ago

## About Chainlink Chainlink is the industry-standard oracle platform bringing the capital markets onchain and powering the majority of decentralized finance (DeFi). The Chainlink stack provides the essential data, interoperability, compliance, and privacy standards needed to power advanced blockchain use cases for institutional tokenized assets, lending, payments, stablecoins, and more. Since inventing decentralized oracle networks, Chainlink has enabled tens of trillions in transaction value and now secures the vast majority of DeFi. Many of the world’s largest financial services institutions have also adopted Chainlink’s standards and infrastructure, including Swift, Euroclear, Mastercard, Fidelity International, UBS, S&P Dow Jones Indices, FTSE Russell, WisdomTree, ANZ, and top protocols such as Aave, Lido, GMX and many others. Chainlink leverages a novel fee model where offchain and onchain revenue from enterprise adoption is converted to LINK tokens and stored in a strategic Chainlink Reserve. Learn more at chain.link. ## About the Role As a software engineer on the Data Products team, you’ll collaborate with an experienced technical team of other engineers, distributed systems computing experts, and security experts, who are all committed to building a world-changing decentralized infrastructure. You’ll develop and build highly scalable, secure, and reliable software that will change the way smart contracts function at a fundamental level, with a focus on Data Feeds. You’ll have the opportunity to learn and master the latest research concerning distributed systems, cryptography, blockchains, game theory, consensus algorithms, and decentralized applications. You will be given a high level of autonomy/ownership over your projects, the opportunity to expand your scope of knowledge, and the chance to help build the decentralized infrastructure of the future. ## Your Impact - Designing and implementing new features within the Data Product space, such as trust-minimized off-chain computation & the aggregation of external data in various blockchain environments, and many more problems - Design and own the end to end delivery of new and existing data products that power the largest market share of Defi by total value secured (TVS) - Learn more about the underlying technology in the blockchain ecosystem (Solana, Avalanche, Polygon, Ethereum, and more) - Build our core products with Smart Contracts using Solidity, Move, and Rust - Partner with the research team to build cutting-edge products - Think creatively about attack vectors, possible failures, and disaster scenarios, modeling them in reproducible test environments, and developing fixes - Managing the architectural vision for new subsystems in the core Chainlink node - Implementing resilient distributed systems to achieve extremely high reliability in a variety of blockchain environments ## Requirements - At least 7-10+ years of professional software engineering experience working in a collaborative product-driven environment - Experience in blockchain and other Web 3.0 technologies - Experience developing smart contracts that secured meaningful value on-chain - Knowledge of computer science fundamentals and systems design concepts - Experience owning multi month long projects, including communication of progress, dependencies, and risk mitigation directly with stakeholders and partners - Experience building distributed systems and low-latency systems - B.S. or higher in computer science, software engineering, mathematics or related technical field ## Desired - Experience in Golang or any other strongly-typed programming language - Experience working with a globally distributed team - Experience working in or with market data ## Our Stack Golang, Solidity, TypeScript, Rust, Postgres, Terraform, AWS *All roles with Chainlink Labs are global and remote-based. Unless otherwise stated, we ask that you try to overlap some working hours with Eastern Standard Time (EST).* *We carefully review all applications and aim to provide a response to every candidate within two weeks after the job posting closes. **The closing date is listed on the job advert, so we encourage you to take the time to thoughtfully prepare your application.** We want to fully consider your experience and skills, and you will hear from us regarding the status of your application shortly after the closing date.* ## Commitment to Equal Opportunity Chainlink Labs is an equal opportunity employer. All qualified applicants will receive equal consideration for employment in compliance with applicable laws, regulations, or ordinances. If you need assistance or accommodation due to a disability or special need when applying for a role or in our recruitment process, please contact us via this form. ## Global Data Privacy Notice for Job Candidates and Applicants Information collected and processed as part of your Chainlink Labs Careers profile, and any job applications you choose to submit, is subject to our Recruiting Privacy Policy. By submitting your application, you are agreeing to our use and processing of your data as required. When applying, mention the word **CANDYSHOP** to show you read the job post completely.

Senior Engineer at Aetherum

Aetherum.ai

2 days ago

## Company Description **Aetherum** (aetherum.ai) is building B2B crypto-collateralized lending infrastructure purpose-built for NCUA-regulated U.S. credit unions. We give credit unions the tools to offer crypto-backed loans to their members — with AI-powered underwriting, on-chain compliance, and institutional-grade custody architecture that keeps assets in the credit union's direct control. 5 patents pending. Live platform. Active partnerships. We're solving a problem no one else is built to solve. ## Role Description This is a foundational **Senior Engineer** role based in the San Francisco Bay Area (hybrid). You won't be joining a large team — you'll be the engineer who helps take Aetherum to its production-ready MVP deployment. That means owning real architecture decisions, working directly with the founder, and building on a live platform with paying infrastructure partners already in place. ## What You'll Own - **NestJS/TypeScript backend and React frontend** (you're extending, not starting) - **On-chain compliance architecture** (ERC-3643, Solidity, Sepolia → mainnet path) - **Crypto collateral architecture** across multiple asset types including XRP and stablecoins — with custody rails that keep assets in the credit union's direct control - **AI-powered underwriting pipeline** (Python microservices) - **Infrastructure decisions** you'll defend to regulators and investors ## The IP You'll Be Building On 5 patents pending across the core of what makes Aetherum defensible: 1. **DACS™** — proprietary risk assessment model scoring crypto-collateralized loan eligibility across 10 pillars, purpose-built for NCUA-regulated environments 2. **FHE-DACS** — Fully Homomorphic Encryption layer enabling privacy-preserving risk scoring without exposing member financial data 3. **DACS-Driven Dynamic LTV** — on-chain enforcement of per-member loan-to-value ceilings derived from DACS scores, written to the blockchain at origination 4. **ERC-3643 CUMember On-Chain Identity** — compliance module tying credit union membership, jurisdiction, and KYC status to an on-chain identity standard built for institutional lending 5. **TPSOE/DACS Methodology** — the underlying scoring and optimization engine This isn't a crypto app with a compliance checkbox. The compliance architecture is the product — and you'll be the engineer who extends and defends it. ## Qualifications - 7+ years full-stack engineering, with at least 2 in Web3/blockchain - Proficiency in TypeScript, NestJS, React, Python, and Solidity - Experience shipping in regulated fintech, crypto infrastructure, or B2B SaaS - Familiarity with MongoDB, Redis, and API-first architecture - Strong understanding of on-chain identity, compliance modules, and smart contract security - The kind of engineer who asks "why" before writing a line of code - Remote / Based in the San Francisco Bay Area ## What This Is This is an early-stage, equity-heavy role. If you want a big salary and zero ambiguity, this isn't it. If you want to own the technical direction of a company solving a real problem in a space no one has cracked yet — let's talk. www.aetherum.ai 📩 **Apply:** AetherumDev@aetherum.ai *When applying, mention the word **CANDYSHOP** to show you read the job post completely.*

Smart Contract Developer

Golfiuns

5 days ago

## Smart Contract Developer We are looking for a **Smart Contract Developer** to design, develop, and maintain secure and efficient smart contracts for Web3 applications. You will work on DeFi protocols, token systems, NFT platforms, and blockchain infrastructure across ecosystems such as Ethereum and other EVM-compatible networks. ### Key Responsibilities * Design, develop, and deploy smart contracts (DeFi, NFTs, tokens, DAO systems) * Architect on-chain solutions and protocol logic * Optimize smart contracts for gas efficiency and performance * Conduct internal security reviews and vulnerability checks * Integrate smart contracts with backend and frontend systems * Deploy and maintain contracts on testnet and mainnet environments * Collaborate with product, backend, and security teams * Participate in protocol design and technical decision-making ### Requirements * 1–3+ years of experience in smart contract development * Strong proficiency in Solidity * Deep understanding of the EVM and blockchain fundamentals * Experience with DeFi protocols (AMM, lending, staking, etc.) * Knowledge of smart contract security patterns (reentrancy, overflow, access control, etc.) * Experience with testing frameworks (Hardhat, Foundry, Truffle) * Ability to write clean, secure, and optimized code * Understanding of tokenomics and Web3 system design **Contact Us:** Email - contact@golfiuns.biz / Telegram - @golfiuns *When applying, mention the word **CANDYSHOP** to show you read the job post completely.*

Founding Protocol Engineer

Joyride Labs

7 days ago

## About Joyride Joyride is building the first dedicated 0DTE options exchange for crypto traders. Derivatives are the single largest opportunity to bring traditional finance on-chain, with over $3.5 trillion in notional volume traded in the U.S. every day. Our architecture is hybrid: a central limit order book (CLOB) for low-latency execution, paired with a blockchain for transparent, non-custodial settlement. ### The Team You'll join a founding team that includes the founders and early contributors of Origin Protocol, where we've been building on Ethereum since 2017 and have scaled products to nine-figure TVL. Two of Joyride's cofounders are early advisors to Solana and have built multiple venture-backed companies acquired by Google, Yahoo, and Walmart. ### The Challenge Centralized exchanges are fast but require trust. On-chain exchanges are trustless but slow. We refuse to accept this tradeoff. Joyride centralizes execution for speed and decentralizes verification for trust. Making that seam airtight is the hard part. * **Self-Custody Without Compromise**: Users keep the keys to their own funds and can withdraw without permission from the exchange operator, even if our servers go down. This can't come at the cost of execution speed or capital efficiency. * **Verifiable Execution**: Every off-chain trade must be provably valid on-chain. The exchange operator cannot front-run, reorder, or fabricate trades. Cryptographic proofs link the off-chain matching engine to on-chain settlement without trusting the operator. * **Censorship Resistance**: If the exchange goes dark, users must be able to reconstruct their account state from public data and withdraw their funds. No capital can ever be trapped. * **Security**: DeFi protocols have lost billions of dollars to smart contract exploits, oracle manipulation, and bridge failures. Our on-chain systems must be designed defensively from day one. As our **Founding Protocol Engineer**, you will own the trust and verification layer of Joyride's hybrid architecture. You'll work alongside our Founding Principal Engineer, who owns the matching engine and risk engine. Together, you will build an options exchange that combines the speed of a CEX with the safety guarantees of a DEX. *If you've spent time thinking about how to make off-chain execution verifiable on-chain and how to protect users from a malicious operator, keep reading.* ### Problems You'll Work On * How do you prove to a Solana program that 50,000 off-chain trades were executed fairly, without exceeding compute unit limits? * What Merkle tree structure lets users prove their balance against an on-chain state root while keeping proof sizes small enough for a single transaction? * How do you build a forced withdrawal mechanism that works even when the exchange operator is adversarial or offline? * How do you batch-publish trade history to a DA layer without leaking information that front-runners can exploit? ### Your Domain * **Settlement & Custody**: Users keep custody of their own funds while trading on Joyride. The exchange can lock collateral for risk management but can never take it. When trades settle, funds move based on cryptographic proof, not operator permission. * **Verifiable Execution**: Our matching engine runs off-chain for speed. That means traders are trusting us not to cheat. Your job is to eliminate that trust requirement. Prove to the blockchain that every trade was executed fairly and that the operator can't front-run or manipulate the order book. * **Censorship-Resistant Recovery**: If Joyride disappears tomorrow, every user must be able to independently prove what they own and withdraw it. Trade history must be publicly available and verifiable without our cooperation. * **Unilateral Exit**: Users must be able to leave the system on their own terms, even if the exchange operator is malicious or offline. This is the ultimate safety guarantee and the hardest problem to get right. * **On-Chain Security**: The on-chain systems hold real money. You're the first line of defense, threat-modeling the boundary between off-chain and on-chain and designing systems that are resilient by construction, not by audit. ### Who You Are * **Protocol Engineer, Not App Developer**: You've worked at the infrastructure layer of blockchains: client implementations, consensus protocols, p2p networking, or cryptographic systems. You understand how chains work under the hood, not just how to deploy contracts on them. * **Applied Cryptographer**: You think in Merkle trees, digital signatures, and commitment schemes. You can evaluate whether a ZK proof system, a TEE-based attestation, or a simpler signature scheme is the right tool for a given trust boundary. You follow the research but you ship production code. * **Hybrid Architecture Thinker**: You understand how other exchanges connect off-chain execution with on-chain settlement. You have opinions about their tradeoffs and can articulate what you'd do differently. * **Security-Minded**: You think like an attacker. When you see a bridge between an off-chain server and an on-chain program, your first instinct is to enumerate the ways it can be broken. * **Builder**: You write code every day. You're not looking to manage a team. You want to architect and build critical infrastructure yourself. ### Requirements * 5+ years of systems engineering in Rust, C++, or Go * Deep experience with Solana program development or equivalent blockchain runtime * Strong applied cryptography: Merkle trees, digital signatures, hash-based commitments, proof systems * Understanding of DeFi security: common exploit vectors, smart contract auditing patterns * Experience with hybrid or L2 architectures: off-chain execution with on-chain verification/settlement ### Bonus * Built or worked on a hybrid exchange where matching happens off-chain and settlement happens on-chain * Worked on state verification, fraud proofs, validity proofs, or forced exit mechanisms for an L2 or rollup, including DA integrations * Contributed to a blockchain client or protocol implementation ### What We Offer * Competitive salary and meaningful equity * Remote-first * Full autonomy over your domain * Open-source friendly When applying, mention the word **CANDYSHOP** to show you read the job post completely.

Software Engineer - EVM - Crypto & Onchain

Kraken

8 days ago

## Building the Future of Crypto Our Krakenites are a world-class team with crypto conviction, united by our desire to discover and unlock the potential of crypto and blockchain technology. **What makes us different?** Kraken is a mission-focused company rooted in crypto values. As a Krakenite, you’ll join us on our mission to accelerate the global adoption of crypto, so that everyone can achieve financial freedom and inclusion. For over a decade, Kraken’s focus on our mission and crypto ethos has attracted many of the most talented crypto experts in the world. Before you apply, please read the Kraken Culture page to learn more about our internal culture, values, and mission. We also expect candidates to familiarize themselves with the Kraken app. Learn how to create a Kraken account here. As a fully remote company, we have Krakenites in 70+ countries who speak over 50 languages. Krakenites are industry pioneers who develop premium crypto products for experienced traders, institutions, and newcomers to the space. Kraken is committed to industry-leading security, crypto education, and world-class client support through our products like Kraken Pro, Desktop, Wallet, and Kraken Futures. **Become a Krakenite and build the future of crypto!** ## Proof of work ## The Team Join our Crypto team to help integrate Kraken’s systems with an ever-expanding universe of cryptocurrencies and blockchains. This team is responsible for developing & supporting crypto operations including deposits, withdrawals & staking. As a member of this team, your focus is on protecting client funds. You will be responsible for building systems that communicate with various blockchains to enable the timely processing of client transactions, while also ensuring the safety and security of all funds on the exchange. ## The Opportunity - Integrate our existing systems with exciting new blockchains - Design and implement low-latency, high-availability, super secure applications and data protection systems - Write highly scalable, high volume services - Write reusable, testable, and efficient code - Design and optimize database schemas - Own, develop and maintain existing crypto services ## Skills you should HODL - At least 4 years of backend development experience - Solid expertise in the Ethereum stack, with hands-on experience in smart contract development using Solidity - Strong backend development skills with Typescript (Node.js) and/or Rust - Understanding of cryptographic principles and security best practices for EVM-based systems - Familiarity with Docker, Kubernetes, and GNU/Linux environments - Proficiency with Git and testing frameworks for automated testing and unit tests - Passion for blockchain development, with a strong focus on Ethereum, EVM, L2s and decentralized technologies - A proactive and adaptable mindset, ready to tackle dynamic challenges in a fast-paced environment *Unless a specific application deadline is stated in the job posting, applications are accepted on an ongoing basis.* *Please note, applicants are permitted to redact or remove information on their resume that identifies age, date of birth, or dates of attendance at or graduation from an educational institution.* *We consider qualified applicants with criminal histories for employment on our team, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.* Kraken is powered by people from around the world and we celebrate all Krakenites for their diverse talents, backgrounds, contributions and unique perspectives. We hire strictly based on merit, meaning we seek out the candidates with the right abilities, knowledge, and skills considered the most suitable for the job. We encourage you to apply for roles where you don't fully meet the listed requirements, especially if you're passionate or knowledgable about crypto! We may ask candidates to complete job-related skills or work-> As an equal opportunity employer, we don’t tolerate discrimination or harassment of any kind. Whether that’s based on race, ethnicity, age, gender identity, citizenship, religion, sexual orientation, disability, pregnancy, veteran status or any other protected characteristic as outlined by federal, state or local laws. **Stay in the know** Follow us on Twitter Learn on the Kraken Blog Connect on LinkedIn Candidate Privacy Notice When applying, mention the word **CANDYSHOP** to show you read the job post completely.

Fireblocks Implementation Developer

PURVIEW

12 days ago

## Job Title: Fireblocks Implementation Specialist – Developer **Location:** Dallas or San Francisco **Employment Type:** Contract ## Job Summary We are seeking a highly skilled **Fireblocks Implementation Specialist – Developer** to lead the integration and development of secure digital asset infrastructure using Fireblocks. This role requires strong backend engineering expertise, API integration experience, and deep knowledge of blockchain technologies and cryptographic security. You will play a critical role in building secure, scalable systems for digital asset custody, transfers, and transaction workflows. ## Key Responsibilities * Design and implement integrations with Fireblocks APIs, SDKs, and webhooks * Develop backend services for **wallet management, transaction orchestration, and automation workflows** * Implement **secure key management solutions** leveraging MPC (Multi-Party Computation) * Configure transaction policies, role-based access controls, and approval workflows * Build monitoring, alerting, and reporting tools for digital asset operations * Troubleshoot and resolve issues related to blockchain transactions and API integrations * Collaborate with DevOps, Security, and Product teams to deploy scalable solutions * Ensure adherence to **U.S. compliance and security standards** (SOC 2, ISO 27001, PCI where applicable) * Support audit processes and maintain proper documentation ## Required Qualifications * 4+ years of software development experience (Java, Python, Node.js, or Go) * Strong experience with **REST APIs, webhooks, and microservices architecture** * Hands-on experience with Fireblocks or similar custody platforms (e.g., Coinbase Custody, BitGo) * Solid understanding of **blockchain protocols** (Bitcoin, Ethereum, etc.) * Knowledge of **cryptography and key management** (MPC, wallets, digital signatures) * Experience with **cloud platforms** (AWS preferred, Azure/GCP acceptable) * Familiarity with **CI/CD pipelines, Docker, Kubernetes** * Strong debugging and system design skills ## Preferred Qualifications * Experience in **fintech, crypto exchanges, or Web3 companies** * Knowledge of **smart contracts (Solidity)** * Experience with **HSMs (Hardware Security Modules)** * Understanding of **U.S. regulatory environment** (FinCEN, SEC considerations for digital assets) * Prior experience working in **client-facing or implementation roles** When applying, mention the word CANDYSHOP to show you read the job post completely.

Blockchain Developer

Harris Allied

13 days ago

## Blockchain/Smart Contract Developer A Financial Technology industry leader has an immediate need for a **Blockchain/Smart Contract Developer** to join their world-class technology team in a full-time role based in midtown Manhattan. The individual in this exciting role is responsible for the development of blockchain-based applications and decentralized applications (dApps), from smart contract design to intuitive and high-performing blockchain integration. In this hybrid role, you will work on the end-to-end delivery of secure, scalable, and engaging products. Expertise with blockchain technology (e.g., smart contracts, web3 integration), cloud platforms, tools and frameworks, and Python or Java is required. ### About the Role * 3+ years of experience in blockchain / smart contract software engineering * Designing, writing, and building secure smart contracts for Ethereum-based applications/token standards like ERC20, ERC721, and ERC1400 using Solidity along with third-party interfaces and design patterns like Upgradeable Proxy Pattern * Evaluating and integrating with multiple blockchain protocols, including both EVM and non-EVM ecosystems (Avalanche, Solana, Hyperledger) * Hands-on experience with tools/frameworks like OpenZeppelin, Hardhat, Foundry, ethers.js; including writing comprehensive and automated tests (unit, integration, and fuzz) * Integrating / bridging between blockchain/distributed ledgers and external components * Proficiency in two or more of the following languages: Java, TypeScript, Python ### Skills/Qualifications * Designing, implementing, and supporting distributed blockchain-based enterprise solutions for regulated domains (financial/banking/asset management) * Familiarity with Web3 ecosystems, DeFi, cross-chain interoperability, wallet integrations, layer 2 & scaling solutions * Familiarity with AI coding tools is a plus * Working knowledge of cloud platforms (Google Cloud, AWS) is a plus * Experience in software engineering with large and diverse codebase * Excellent writing and communication skills *When applying, mention the word **CANDYSHOP** to show you read the job post completely.*

Senior Backend Engineer (Rust)

CoW DAO

14 days ago

## About CoW DAO **CoW DAO** is on a mission to protect Ethereum users from MEV and optimize trade execution across DeFi. We achieve this through the CoW Protocol, CoW Swap (a leading intent-based DEX aggregator), and the innovative MEV Blocker, which together help secure, aggregate, and route trades for optimal outcomes. We also fund values-aligned projects via the CoW Grants Program. CoW Protocol is consistently ranked among the top DEX aggregators by monthly volume and is the largest intent-based exchange. Our MEV Blocker protects trades from harmful MEV extraction and is integrated across the Ethereum ecosystem. The CoW AMM is the only live AMM designed to protect liquidity providers from LVR (loss-versus-rebalancing). With over **100 open-source repositories** on GitHub, we're transparent, community-driven, and deeply committed to the open-source ethos. Our real-time Dune Analytics dashboard showcases billions in cumulative trading volume and a rapidly growing user base. As we continue to scale, CoW DAO remains at the forefront of DeFi innovation, prioritizing security, efficiency, and decentralization. ## About the Role *Location:* We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in **Europe or remote +/- 4 hours CEST time**. *Please note:* We’re not hiring from the US, Australia, or New Zealand. *Position:* **Full-time contractor** We are looking for an enthusiastic, self-motivated, **Senior Backend Engineer** to help us build the next generation of decentralised trading protocols. As a dedicated backend engineer, you will gain ownership of our existing backend services and influence the creation, design, and execution of future features and products. You will work on technically challenging aspects of our off-chain services and our developer-facing APIs and help ensure the delivery of reliable and performant features to improve CoW Protocol. **Our Tech Stack** - **Backend Code:** Rust, Tokio, Cargo, Git (https://github.com/cowprotocol/services) - **Infrastructure:** Pulumi, AWS, Docker, Kubernetes, Grafana, Prometheus, Elasticsearch - **Other codebases:** Typescript, Python, Solidity ## What You Will Do - Architect and design our off-chain services (core auction protocol as well as the orderbook) to support feature growth and the rapidly changing requirements that come from being an application on a constantly evolving blockchain. - While your focus will be writing concurrent backend systems in Rust, you will also interact with our Smart Contracts written in Solidity and develop your understanding of auction mechanisms and DeFi protocols. - Participate in our on-call rotation to help ensure the reliability of our production systems (**on-call work is additionally compensated**). - Work closely with researchers and the product team to ship features and come up with new solutions for challenging technical problems. - Deliver high-quality code for features from concept until production (including state-of-the-art monitoring of our production systems). - Give thoughtful and in-depth code reviews of your colleagues’ contributions to our open-source codebase. ## Who You Are - You have 5+ years of production experience with **systems-level programming languages**, with at least 1+ year of hands-on production experience using **Rust**. - You have **practical experience working in web3** (ideally in DeFi and the Ethereum ecosystem). - You have excellent computer science, programming, and algorithmic skills. - Experience with operating, maintaining, and architecting complex software systems. - You care deeply about the quality, readability, observability, and testability of your code. - You proactively give technical direction to improve performance, prevent issues, optimise data usage, and refactor the codebase. - You are a team player, strong communicator, and gladly share your expertise with others. - You collaborate effectively with a remote-first team on a large, open-source codebase. - Ideally, someone senior who can mentor colleagues and provide direction. - You are excited to explore and gain experience with Ethereum. ## What We Can Offer You - Flexible work environment: Join our hub in Lisbon or work remotely. - Token plan: Have a stake in our mission and shape the future of CoW DAO. - Periodic gatherings: Enjoy opportunities to connect with the rest of the team through regular trips. - Conference allocation: Stay up-to-date with ecosystem advancements using our conference budget. - Learning budget: Use our learning budget to support your higher ambitions. - Hardware budget: Take advantage of a hardware budget for acquiring necessary equipment. - Make an impact: You are joining a startup where you can make a huge difference. Your work matters! - Flat hierarchies mean fewer processes and bureaucracy - see more of your ideas come to life! - Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance. - Growth: If you're someone who loves taking the initiative and getting things done, CoW offers lots of opportunities for your individual growth. ## Referral Program Earn 6,000 USDC or USD with the refer-to-earn program. More details [here]. ## Culture Life within the CoW DAO is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we're all about feedback, coming together, and enjoying the journey along the way! **At CoW DAO, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our diverse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.** When applying, mention the word **CANDYSHOP** to show you read the job post completely.

Solidity Developer

IntellectEU

15 days ago

## IntellectEU IntellectEU is an international technology company focused on digital finance and emerging technologies. At IntellectEU we are on a mission to become the top-of-mind fintech company. We are committed to our people and believe in building a better future with the newest technologies. We give rising talent and industry veterans the space to explore, launch ideas, and collaborate closely with our clients. With our technical hands-on experience in payments, blockchain and capital markets, there’s no challenge that’s left unsolved. Over the past two decades, we have earned our expertise in financial technology, executing on hundreds of complex integrations and co-creating new digital asset platforms alongside our clients. **Type of cooperation:** On-site, Manassas (Virginia) ## Responsibilities * Design, build, and deploy distributed ledger technology (DLT) solutions and smart contracts using Solidity, Java, and REST APIs. * Implement secure transaction logic using cryptographic techniques to protect digital assets and prevent unauthorized access. * Research, develop, and implement various blockchain protocols and consensus algorithms. * Collaborate with Product Owners and technical teams to gather requirements and define technical solutions. * Integrate blockchain solutions with enterprise systems, databases, and APIs. * Analyze and troubleshoot system performance, network issues, and blockchain transaction problems. * Develop documentation and technical specifications for blockchain implementations. * Contribute to continuous improvement, DevOps practices, and operational support. * Work with AWS deployment environments and infrastructure tools. ## Requirements ### Must have * Bachelor’s or Master’s degree in information technology, computer science, engineering, or equivalent experience. * Solid foundation in smart contracts development and relevant technologies (Solidity, Typescript, Vyper etc). * Knowledge of smart contract dev tools/frameworks - foundry, hardhat, openzeppelin libraries (Upgradeable contracts, proxy patterns). * Knowledge of smart contract security aspects (re-entrance attack, Race conditions, Integer overflow/underflow, Denial of service, etc). * Experience with Solidity security testing tools like Slither, Mythril, and Echidna. * Production experience with EVM-based blockchain applications. * Familiarity with basic cryptography and P2P networks. * Experience with web3.js or ether.js, and crypto wallets like MetaMask or MEW. * Understanding of RESTful web services design. * Understanding of the modern development ecosystem: Git, CI/CD, and automated testing. ### Nice to have * Experience with Hyperledger Besu. * Proficiency with databases such as MySQL, Oracle, and MongoDB. * Knowledge of Level 2 scaling technologies. * Experience with implementing ERC20 and ERC721 or IERC1155 contracts. ## We guarantee * International experience in a stable company: the company has offices in Antwerp, Lisbon, Krakow, Kyiv, New York and operates on the market for over 15 years. * A passionate team in an innovative, casual, positive, and open work environment ready to meet your new ideas. * Great opportunities for personal and professional development as well as the chance to change the way the business works in the financial world. **Join us to make an impact on the entire financial world!** *When applying, mention the word CANDYSHOP to show you read the job post completely.*

Digital Assets - Blockchain Software Developer

Franklin Templeton

15 days ago

**Blockchain Development Engineer (AI-Augmented)** At Franklin Templeton, we’re advancing our industry forward by developing new and innovative ways to help our clients achieve their investment goals. Our dynamic firm spans asset management, wealth management, and fintech, offering many ways to help investors make progress toward their goals. Our talented teams working around the globe bring expertise that’s both broad and unique. From our welcoming, inclusive, and flexible culture to our global and diverse business, we provide opportunities to help you reach your potential while helping our clients reach theirs. Come join us in delivering better outcomes for our clients around the world! ## About The Department The Digital Assets Technology group builds blockchain-based infrastructure shaping the future of asset management and capital markets. The team consists of experienced engineers who collaborate closely with product and design partners to research, experiment, and deliver secure solutions that tokenize securities across multiple blockchain platforms. We operate at the intersection of institutional finance and emerging technology, delivering production-grade systems that serve real-world regulated assets. Joining the team offers exposure to cutting-edge financial technologies, complex multi-chain engineering challenges, and meaningful industry impact at one of the world’s largest asset managers. ## Role Overview We are looking for a **Blockchain Development Engineer** who combines deep smart contract expertise with fluency in AI-assisted development practices. This is not a role where AI tools are optional or aspirational — we expect you to use AI coding assistants, LLM-driven testing and review workflows, and generative AI tooling as core parts of your daily engineering process. Your blockchain fundamentals must be strong enough that you can critically evaluate and improve AI-generated output in a domain where deployed bugs are irreversible and security is non-negotiable. ## How You Will Add Value ### AI-Augmented Development - Use AI coding assistants (Codex, Cursor, Claude Code, or equivalent) as a primary development accelerator across the full lifecycle — prototyping, implementation, testing, and documentation. - Apply LLM-driven workflows for automated code review, test generation, security analysis, and architectural reasoning on smart contract codebases. - Critically evaluate AI-generated Solidity and Rust code for security vulnerabilities, gas optimization issues, and compliance gaps — recognizing that AI output in smart contract contexts requires expert human judgment. - Identify and implement opportunities to integrate AI tooling into team workflows, CI/CD pipelines, and quality assurance processes. - Stay current with rapidly evolving AI-assisted development tools and techniques, evaluating new capabilities for team adoption. ### Blockchain Engineering - Design, develop, and deploy smart contracts across EVM-compatible networks and Stellar, with a focus on security, efficiency, and regulatory compliance. - Build and maintain multi-chain deployment infrastructure and tooling to support the department’s blockchain footprint. - Test and audit smart contracts using formal verification tools and security frameworks (Foundry, Slither, or equivalent). - Maintain and upgrade deployed contracts with backward compatibility, migration strategies, and rigorous change management. - Collaborate with engineers, product partners, and designers to translate business requirements into robust on-chain solutions. ## Required Experience **What Will Help You Be Successful** - 5+ years of software engineering experience on mission-critical or production-grade systems. - 3+ years of hands-on blockchain development and smart contract deployment. - Demonstrated, ongoing use of AI-assisted development tools (Copilot, Cursor, Claude Code, or similar) as a core part of the engineering workflow — not experimental or occasional. - Bachelor’s degree in Computer Science, Engineering, or equivalent professional experience. ### Required Technical Skills - **Solidity:** Production-level proficiency; experience writing, deploying, and auditing smart contracts on EVM-compatible chains (Ethereum, Avalanche, Polygon, Arbitrum, or similar). - **Stellar:** Working knowledge of the Stellar network is desired. - **TypeScript/JavaScript:** Proficiency in full-stack development with Node.js and modern frameworks. - **AI/LLM Tooling:** Hands-on experience using AI assistants for code generation, review, debugging, and test authoring; ability to craft effective prompts and evaluate output quality in the context of blockchain security. - **Testing & Security:** Experience with smart contract testing frameworks. ## Preferred Qualifications - Experience with permissioned or hybrid blockchain architectures in regulated financial environments. - Exposure to compliance considerations for on-chain securities (KYC/AML, transfer restrictions, whitelisting). - Rust proficiency, particularly for non-EVM smart contract platforms (Soroban, Solana, Aptos). - Experience contributing to or driving technical standards, ADRs, and engineering best practices within a team. ### Working Style - Comfortable with async-first communication across globally distributed time zones. - Strong problem-solving skills with a bias toward shipping and iterating. - Collaborative mindset with the ability to give and receive direct, constructive feedback. ## Work Schedule & Location 100% Remote. ## Why Join Us? Be part of a pioneering team at **Franklin Templeton** that is shaping the future of finance through blockchain innovation. You’ll work alongside top technologists and strategists to deliver impactful solutions in a collaborative and forward-thinking environment — one where AI-augmented development is not just encouraged, but expected as the standard way of working. Franklin Templeton offers employees a competitive and valuable range of total rewards — monetary and non-monetary — designed to support their well-being and recognize their time, talents, and results. Along with base compensation, employees are eligible for an annual discretionary bonus, a 401(k) plan with a generous match, and recognition rewards. We also offer a comprehensive benefits package, which includes a range of competitive healthcare options, insurance, and disability benefits, employee stock investment program, learning resources, career development programs, reimbursement for certain education expenses, paid time off (vacation / holidays / sick / leave / parental & caregiving leave / bereavement / volunteering / floating holidays) and a motivational wellbeing program. We expect the annual salary for this position to range between **$125,000 – $165,000** depending on location and level of relevant experience, plus discretionary bonus. **Experience our welcoming culture and reach your professional and personal potential!** Our culture is shaped by the variety of perspectives and experiences brought by talent from around the world. By joining us, you will become part of a culture that focuses on employee well-being and provides multidimensional support for a positive and healthy life. ### Highlights Of Our Benefits Include - Three weeks paid time off the first year.