Remote Senior Solidity Engineer (EVM)

Description:

• Tothemoon is a user-centric, multiservice digital assets trading platform that prioritizes reliability in finance.
• The role involves joining a green-field engineering squad to design smart-contract rails for a high-throughput, regulated crypto-payments platform operating across multiple chains.
• The candidate will own the Solidity codebase, security posture, and upgrade path for core contracts that handle asset custody, compliance hooks, and cross-chain value transfer.
• Responsibilities include architecting, implementing, and maintaining upgradeable Solidity contracts (ERC-20/721/1155 variants).
• The engineer will design compliance and risk-mitigation modules, integrate third-party messaging/oracle frameworks for cross-chain transfers, and write comprehensive unit, fuzz, and invariant tests using Foundry/Hardhat.
• The role also involves preparing code for external security audits, participating in code reviews, mentoring peers, contributing to technical documentation, and assisting DevOps with monitoring and incident response for on-chain events.

Requirements:

• The candidate must have 3+ years of professional Solidity development experience with production mainnet contracts.
• A deep understanding of proxy patterns, storage layout, reentrancy, and other DeFi attack vectors is required.
• Familiarity with at least one cross-chain messaging or bridging stack is necessary.
• Strong testing discipline and experience with automated auditing tools are essential.
• Proficiency in spoken and written Russian and English is required.
• Nice-to-have qualifications include knowledge of advanced scripting primitives (e.g., hashed timelocks, covenants), exposure to stable-coin or payment-token flows, and previous experience integrating price-oracle feeds.

Benefits:

• Employees will enjoy a multicultural environment with colleagues from around the world.
• The team consists of professionals with diverse expertise, fostering a collaborative atmosphere.
• Flexibility and readiness for change are emphasized, as Tothemoon operates as a product company.
• A DevOps culture ensures reliability and security through a dedicated infrastructure team.
• Employees will have responsibility and freedom in problem-solving, working with complex business logic and sensitive data.
• There is an opportunity to dive into trading and blockchain topics.
• Salary is negotiable during the interview and depends on the candidate's experience.
• The position offers flexible working hours and paid holidays.
• The work format is remote.