Software Engineer, Blockchain

1inch is the DeFi ecosystem building financial freedom for everyone. 1inch products help users and builders trade, hold and track digital assets - with the self-custody, comprehensive security and the intuitive user experience they need to unlock the potential of true crypto ownership. 1inch protocols and APIs provide core infrastructure across the DeFi industry and beyond.Your missionAt 1inch, our engineering needs evolve rapidly. We are constantly seeking exceptional Blockchain Engineers to join our mission. Even if we do not have an active vacancy matching your exact seniority today, we want to hear from you.We look for engineers with a high-agency, "Get Stuff Done" mindset and an unrelenting passion for decentralised innovation.As part of our blockchain engineering ecosystem, you will contribute to designing, developing, and optimising the smart contracts and underlying infrastructure powering 1inch. We value sophisticated problem-solvers who can navigate the lightning-fast shifts of the crypto landscape while executing securely at scale. Working alongside our product leads and world-class engineers, your commitment to open-source excellence will keep 1inch at the absolute cutting edge of DeFi.By applying to this talent pool, you will be fast-tracked for consideration the moment a new headcount opens in our global blockchain squad. We welcome applications across all career stages—from highly capable mid-level developers to seasoned principal architects.What You'll DoContribute to the design and optimisation of scalable, secure, and high-performance blockchain architecturesDevelop, integrate, test, and maintain smart contracts and decentralised protocol componentsConduct technical research and support proof-of-concept initiatives for new blockchain and DeFi featuresContribute to cross-chain interoperability solutions, including bridging and atomic swap mechanismsImprove execution efficiency and optimise smart contract logic for gas consumption and performanceCollaborate with engineering and security teams to identify vulnerabilities and strengthen protocol reliabilityParticipate in code reviews, testing, CI/CD workflows, and engineering best practicesWork closely with cross-functional teams to support successful product delivery and continuous improvementWho You AreProfessional software engineering experience with a strong focus on blockchain development and decentralised systemsStrong understanding of Ethereum, EVM-based ecosystems, smart contracts, and decentralised application architectureHands-on experience developing with Solidity, Yul, Rust, and TypeScriptExperience working with Layer 2 scaling solutions, cross-chain infrastructure, or blockchain interoperability protocolsStrong understanding of smart contract security principles, testing methodologies, and vulnerability mitigationExperience using modern blockchain development frameworks such as Foundry or HardhatInterest in or understanding of DeFi concepts including AMMs, liquidity pools, routing, or oracle integrationsStrong problem-solving skills and ability to work effectively in fast-paced engineering environmentsNice to havesExperience contributing to open-source blockchain or Web3 projectsFamiliarity with zero-knowledge technologies or rollup architecturesExperience building distributed systems or low-latency infrastructureUnderstanding of blockchain infrastructure automation and deployment toolingExperience working in high-growth startup or scale-up environmentsWhat We Can OfferWork alongside a globally distributed and highly collaborative team that has helped shape the history of DeFi and Web3 innovationJoin a fast-paced environment where ownership, initiative, and fresh ideas are encouraged and supportedCompetitive compensation package, including a discretionary bonus scheme aligned with your impact and contributionFull equipment support for your remote workspace setup, plus a dedicated learning and development budgetFlexible remote-first culture with an unlimited paid time off policy to support work-life balance1inch is an equal opportunity employer. We are committed to evaluating all candidates on the basis of their skills, experience, and potential — regardless of race, ethnicity, nationality, gender, age, religion, disability, or any other characteristic. We believe diverse teams build better products, and we welcome applications from all backgrounds.We use AI-assisted tools to help us review applications efficiently. These tools support our recruitment team but do not make decisions on our behalf — every application is reviewed by a person before any outcome is determined. No offer or rejection is made solely on the basis of automated processing. For full details on how we use these tools and your rights in relation to them, please see our Applicant and Candidate Privacy Notice.