> Markdown version of [/jobs/ext/101170-senior-software-engineer-blockchain](https://www.wearedevelopers.com/jobs/ext/101170-senior-software-engineer-blockchain). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer, Blockchain - **Company:** 1inch - **Location:** UK (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Code Review, Distributed Systems, Fault Tolerance, Open Source Technology, Blockchain, Software Engineering, TypeScript, Delivery Pipeline, Ethereum, Solidity, Web3.js - **Published:** May 23, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=0785a972fa9ebbc0 ## About the Role Do you have experience in TypeScript?, We are seeking a Senior Blockchain Engineer with a high-agency, "Get Stuff Done" mindset and an unrelenting passion for decentralised innovation. As a core contributor to our engineering ecosystem, you will design, develop, and optimise the smart contracts and underlying blockchain infrastructure powering 1inch. This role requires a sophisticated problem-solver who can navigate the lightning-fast shifts of the crypto landscape while executing securely at scale. Working directly alongside our CPO, product leads, and world-class engineers, your commitment to open-source excellence will keep 1inch at the absolute cutting edge of DeFi., * Proven Footprint: 7+ years of professional software development experience, with a minimum of 3+ years dedicated purely to production-grade blockchain engineering. * EVM Mastery: Deep, native understanding of the Ethereum ecosystem, smart contracts (Solidity, Yul), and the mechanics of decentralized applications (dApps). * Scaling & Infrastructure: Hands-on experience deploying to Layer 2 solutions (Optimistic & ZK Rollups) and manipulating cross-chain architecture. * Technical Leadership: A proven track record of owning architectural decisions from inception to deployment, guiding development teams through complex technical delivery. * Security Focus: Deep expertise in smart contract security principles, vulnerability mitigation, and the auditing process., * Languages: Deep proficiency in Solidity, Yul, and TypeScript (experience with Rust is a strong advantage). * Frameworks: Mastery of modern smart contract development and deployment workflows, specifically Foundry and Hardhat. * DeFi Domain: Advanced understanding of AMMs, liquidity pools, complex mathematical models, and oracle integrations (e.g., Chainlink). * Systems: Solid background in building high-performance, fault-tolerant distributed systems. ## Description * Architecture & Scalability: Design and optimise robust blockchain product architecture, keeping scalability, security, and peak performance at the absolute forefront. * Smart Contract Lifecycle: Lead the end-to-end development, integration, and internal auditing of high-value smart contracts across decentralised protocols. * R&D and PoCs: Conduct advanced technical research and execute proof-of-concept (PoC) experiments to pioneer new features within the DeFi space. * Cross-Chain Innovation: Design and evolve cross-chain interoperability solutions, including atomic swaps and advanced bridging infrastructure. * Gas Optimisation: Deep-dive into execution efficiency, designing algorithms with an extreme focus on gas preservation and low-latency performance. * Security & Audit Collaboration: Systematically analyse attack vectors, enforce ironclad security protocols, and collaborate directly with tier-one external auditors for flawless product launches. * Engineering Excellence: Champion rigorous code reviews, build effective CI/CD pipelines for Web3, and mentor junior/mid-level developers to scale our technical capabilities. ## Related Videos - [Smart Contract fundamentals - My first DApp](https://www.wearedevelopers.com/videos/52-smart-contract-fundamentals-my-first-dapp) - [Blockchains: One Size doesn't Fit All](https://www.wearedevelopers.com/videos/409-blockchains-one-size-doesn-t-fit-all) - [Trust as the Key Concept in Future Mobility](https://www.wearedevelopers.com/videos/581-trust-as-the-key-concept-in-future-mobility) - [Blockchain, NFT and smart contracts for my application](https://www.wearedevelopers.com/videos/877-blockchain-nft-and-smart-contracts-for-my-application) - [SSO with Ethereum and Next JS](https://www.wearedevelopers.com/videos/288-sso-with-ethereum-and-next-js) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) ## Related Articles - [7 tips on how to become a blockchain developer](https://www.wearedevelopers.com/magazine/53-7-tips-on-how-to-become-a-blockchain-developer) - [Why Blockchain? 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