26 to 50 of 139 Smart Contracts Jobs in the UK excluding London

Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 4 Posted: 10.06.2025 Expiry Date: 25.07.2025 col-wide Job Description: Senior Blockchain Engineer – Smart Contracts, Web3, APIs, Node.js, Go, Rust, Solidity, DeFi – Global Investments – Remote – up to £850 outside IR35 We are working with a growing Global Investment organisation, who are seeking a Senior … to join their team on a contract basis, supporting the build of a new digital platform. The successful candidate will be tasked with building secure, scalable smart contracts and backend systems powering tokenized assets and multi-chain infrastructure. Required skills: 5+ years of backend/blockchain development (including 2+ years on live smart contract deployments … such as Hardhat, Ethers.js, Web3.js, or Foundry. Experience integrating blockchain features into real-world financial or investment products. This is an exciting opportunity to work across smart contracts, protocol integrations, and backend engineering within a regulated environment, creating products that are reshaping the future of investing. *please note that candidates must be based in the UK #J More ❯

Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 4 Posted: 10.06.2025 Expiry Date: 25.07.2025 col-wide Job Description: Senior Blockchain Engineer – Smart Contracts, Web3, APIs, Node.js, Go, Rust, Solidity, DeFi – Global Investments – Remote – up to £850 outside IR35 We are working with a growing Global Investment organisation, who are seeking a Senior … to join their team on a contract basis, supporting the build of a new digital platform. The successful candidate will be tasked with building secure, scalable smart contracts and backend systems powering tokenized assets and multi-chain infrastructure. Required skills: 5+ years of backend/blockchain development (including 2+ years on live smart contract deployments … such as Hardhat, Ethers.js, Web3.js, or Foundry. Experience integrating blockchain features into real-world financial or investment products. This is an exciting opportunity to work across smart contracts, protocol integrations, and backend engineering within a regulated environment, creating products that are reshaping the future of investing. *please note that candidates must be based in the UK #J More ❯

industry. This role requires in-person attendance, highlighting our commitment to collaboration and teamwork. As a Solidity Developer, you will be instrumental in developing and implementing smart contracts, leveraging your expertise in blockchain technology to drive innovative solutions. Join us and be part of a dynamic team focused on advancing accounting practices through cutting-edge technology. Applicants … should possess a solid understanding of blockchain technology and smart contract development, with demonstrated experience in programming and problem-solving capabilities. Strong analytical skills, attention to detail, and the ability to work collaboratively within a team environment are essential. Candidates should also exhibit flexibility in adapting to evolving project requirements and show a commitment to maintaining high standards … skills, both written and verbal, are vital for collaborating with diverse stakeholders. Familiarity with accounting principles or financial systems may be advantageous. Responsibilities: Design and implement smart contracts using Solidity, ensuring optimal performance and security. Collaborate with cross-functional teams to gather requirements and translate them into technical specifications. Conduct thorough testing and debugging of smart More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

outside IR35) focused on developing Web3 infrastructure and smart contract solutions in close collaboration with UX and product teams. Key Responsibilities: Develop and deploy smart contracts for DeFi, NFTs, or tokenized platforms (Solidity, EVM-compatible) Integrate Web3 libraries (e.g. Web3.js, Ethers.js) with frontend dApps and wallet providers Collaborate with UX designers to ensure seamless and … intuitive interactions between smart contracts and user interfaces Optimize smart contracts for security, performance, and low gas usage Maintain clear documentation and participate in audits and peer reviews Key Requirements: 3+ years of hands-on experience in blockchain development Proven track record with Solidity, Ethereum-based contracts, and dApp development Familiarity with wallet More ❯

programmatic statistical analysis and quantitative/analytic skills High level understanding of high-frequency market making strategies Understanding of blockchain fundamentals and mechanics of the EVM Familiarity with smart contract development and the Foundry toolkit A passion for learning about protocol microstructure and design mechanisms Note: Although we are unable to accept fully remote candidates, we support significant More ❯

through back-end services and front-end websites and developing client applications; all of these will be communicating across the internet. What you'll do Writing smart contracts, also known as chain code, for Hyperledger Fabric Designing and developing applications using blockchain technology Testing and troubleshooting blockchain-driven projects Maintaining client and server-side applications Preparing documentation More ❯

matter what you trade or where your assets are held. By embedding industry standards like CDM directly into our technology, we harness the power of blockchain, smart contracts and tokenisation to drive automation, interoperability and efficiency across capital markets. Founded in 2022, we are a UK-based start-up in the early commercialisation stage. We are fully … in product ownership, with a focus on product development and an understanding of Product Owner responsibilities. You have experience defining and delivering blockchain-based financial products, such as smart contract-driven settlements, tokenised securities, or decentralised finance applications. You are proficient in gathering and documenting requirements, and have experience creating user stories and process flows. You are familiar More ❯

opportunity to directly impact the business' growth by enhancing existing infrastructure and connecting to new trading venues in both CeFi and DeFi. You will also work on optimising smart contract interactions, on-chain arbitrage, and MEV strategies in DeFi. If you excel in Rust, thrive on solving intellectually stimulating problems, and have a passion for performance-driven development More ❯

opportunity to directly impact the business' growth by enhancing existing infrastructure and connecting to new trading venues in both CeFi and DeFi. You will also work on optimising smart contract interactions, on-chain arbitrage, and MEV strategies in DeFi. If you excel in Rust, thrive on solving intellectually stimulating problems, and have a passion for performance-driven development More ❯

Our client — an innovative startup at the intersection of blockchain and gaming — is building a decentralised platform powered by the TON blockchain . They’re looking for a Smart Contract Engineer (or an experienced backend … engineer eager to move into Web3) to help architect and implement core smart contract functionality. The role is ideal for someone who enjoys working on secure, modular contracts , particularly for RNG-based game logic, asset tracking , and value transfer mechanisms . You’ll collaborate closely with DevOps and backend engineers in a modern serverless stack , with exposure … be joining a compact, senior team with the freedom to influence technical direction and contribute directly to a rapidly evolving space. Key Responsibilities: Design and develop smart contracts using TACT or equivalent languages like Solidity , Rust , or Move Ensure contracts are modular, secure, upgradeable, and deterministic Maintain smart contract interfaces and collaborate across frontend More ❯

the foundational infrastructure of a carbon offset tokenisation system on Hyperledger Besu . This role involves designing and delivering a secure, permissioned blockchain network and developing smart contracts for the minting, verification, and retirement of tokenised carbon credits. You’ll take the lead from network configuration through to testnet deployment and audit readiness, collaborating with a small … agile team committed to sustainability and decentralised innovation. Key responsibilities include: Developing ERC-20/1155-compatible smart contracts with embedded metadata (e.g., project ID, vintage year, verification body). Setting up a multi-node Besu network using IBFT 2.0 or QBFT consensus. Building minting and retirement APIs integrated with off-chain MRV (Measurement, Reporting & Verification) data. More ❯

in Europe/UK Excellent benefits and bonus structures. Wide salary range depending on experience – Up to £170,000 What you will do Build and test smart contracts like Ethereum and Solidity Contribute to a global development and testing teams. Work with various blockchain technologies Work within an Agile environment. What you will need Excellent knowledge of … Python and Django framework. Background in Web3 and Blockchain development. Experience with smart contracts Experience with DevOps technologies Ability to work independently and with a team. Find out more If you would like to have a confidential conversation and find out more about this opportunity, then get in touch with Con Lam at Harrington Starr More ❯

in Europe/UK Excellent benefits and bonus structures. Wide salary range depending on experience – Up to £170,000 What you will do Build and test smart contracts like Ethereum and Solidity Contribute to a global development and testing teams. Work with various blockchain technologies Work within an Agile environment. What you will need Excellent knowledge of … Python and Django framework. Background in Web3 and Blockchain development. Experience with smart contracts Experience with DevOps technologies Ability to work independently and with a team. Find out more If you would like to have a confidential conversation and find out more about this opportunity, then get in touch with Con Lam at Harrington Starr More ❯

in Europe/UK Excellent benefits and bonus structures. Wide salary range depending on experience – Up to £170,000 What you will do Build and test smart contracts like Ethereum and Solidity Contribute to a global development and testing teams. Work with various blockchain technologies Work within an Agile environment. What you will need Excellent knowledge of … Python and Django framework. Background in Web3 and Blockchain development. Experience with smart contracts Experience with DevOps technologies Ability to work independently and with a team. Find out more If you would like to have a confidential conversation and find out more about this opportunity, then get in touch with Con Lam at Harrington Starr More ❯