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| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Rampnetwork | Remote | $101k - $150k | |||
Okx | Remote | $85k - $101k | |||
Phantom | United States | $140k - $150k | |||
Nexus | Brazil | $140k - $157k | |||
Nexus | Argentina | $140k - $157k | |||
Mysten Labs | United States | $135k - $170k | |||
Magic Eden | Krakow, Poland | $102k - $109k | |||
LI.FI | Remote | $70k - $80k | |||
Kraken | United States | $110k - $220k | |||
Kraken | London, United Kingdom | $68k - $90k | |||
Inmobi | Remote | $117k - $156k | |||
Groma | Remote | $84k - $87k | |||
Grayscaleinvestments | Remote | $105k - $165k | |||
Genies | Remote | $250k - $300k | |||
Douro Labs | United States | $68k - $90k |
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
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)