Ghaf Group

Senior Smart Contract & Backend Developer (Solidity, TypeScript)

Ghaf Group

44 days ago

## About the Role We are looking for a highly skilled **Senior Smart Contract Developer** with a strong background in **Solidity**, **TypeScript**, and backend engineering. The ideal candidate will be responsible for designing, building, auditing, and maintaining on-chain logic while also contributing to off-chain services, APIs, and database integrations. This position requires strong communication skills in English, attention to detail, and a passion for debugging and problem solving. ## Responsibilities * Architect, develop, and maintain smart contracts primarily using **Solidity** * Design and implement secure and gas-efficient on-chain logic aligned with business and protocol requirements * Integrate blockchain components with backend services written primarily in **TypeScript** * Build, document, and maintain REST and/or GraphQL APIs * Work with databases (SQL/NoSQL), modeling data and ensuring performance and reliability * Participate in technical planning, code reviews, audits, and security assessments * Own debugging and testing end-to-end — on-chain, off-chain, tooling and integrations * Collaborate closely with founders, engineers, auditors, and product stakeholders * Maintain accurate and clear English-based technical documentation and communication * Research and propose improvements, best practices, and new capabilities across the stack ## Requirements * **5+ years of professional software engineering experience** * **3+ years of Solidity development experience** * Strong knowledge of Ethereum ecosystem, ERC standards, wallets, gas optimization, and on-chain patterns * Proficiency with **TypeScript**, Node.js and modern backend architectures * Experience building and consuming APIs (REST, WebSockets, GraphQL) * Solid understanding of data modeling and databases (PostgreSQL, MySQL, MongoDB, Redis or similar) * Strong testing mindset (Hardhat, Foundry, Jest or similar) * Excellent debugging skills and passion for deep problem investigation * Fluent or near-native **English** communication skills, written and spoken * Ability to work independently with strong accountability and ownership * Familiarity with security considerations: reentrancy, flash loans, oracle risks, underflows/overflows, access control, upgradeability, etc. ## Nice to Have * Experience with auditing smart contracts * Familiarity with Layer 2 and cross-chain patterns * DevOps familiarity (Docker, CI/CD pipelines, infrastructure as code) When applying, mention the word **CANDYSHOP** to show you read the job post completely.