1 to 25 of 91 Ethereum Jobs in London

Blockchain Core Developer - Golang, Ethereum London/Remote About Clearmatics Clearmatics is a blockchain protocol engineering company that builds decentralised financial market infrastructures that are more open, efficient, and resilient than those serving legacy market structures of today. We have a bold vision for this new market infrastructure - enabling market participants to solve currently unaddressed problems of the real economy … also been an active participant and supporter of decentralized infrastructure initiatives. We're looking to hire a Core Developer to expand our Layer 1 Engineering team. Our stack is Ethereum-like, so familiarity with -- and passion for -- the space is key. Some of the areas we tackle include blockchain infrastructure optimised for financial use-cases, protocols for specific applications (such … writing and in discussions. RESPONSIBILITIES You will be involved at all stages of the development lifecycle for the Autonity protocol and its blockchain node client (a fork of go-ethereum). These include: Implementing new protocol features in Go and Solidity Developing new distributed systems tests and frameworks Contributing to protocol and design specifications Working with members of the community More ❯

Web3-onboard.js Infrastructure: AWS, CircleCI, Coveralls, Kibana, Grafana, Prometheus Areas you'll contribute to Writing and compiling Solidity Smart Contracts, including handling quirks and edge cases Deploying contracts on Ethereum testnets and scripting deployments Integrating with and fetching data from Oracles and The Graph Ensuring blockchain and web-client integration Containerizing backend services At least 1 year of Solidity development More ❯

Smart Contract Engineer - Ethereum, Solidity London/Remote About Clearmatics Clearmatics is a blockchain protocol engineering company that builds decentralised financial market infrastructures that are more open, efficient, and resilient than those serving legacy market structures of today. We have a bold vision for this new market infrastructure - enabling market participants to solve currently unaddressed problems of the real economy … in blockchain and cryptography research communities. We also support decentralized infrastructure initiatives. We are hiring a Smart Contract Engineer to expand our Layer 1 Engineering team. Our stack is Ethereum-like, so familiarity with and passion for this space is essential. Our work includes blockchain infrastructure for financial use-cases, protocols for applications like smart derivatives, synthetic assets, cryptocurrency stabilization … s degree in Computer Science or related field Strong knowledge of Eth1 protocols and proof of stake consensus Understanding of DeFi landscape and primitives Proficiency in Python and web3.py Ethereum development Experience with data oracles and P2P data stores (e.g., IPFS) Experience working with third-party smart contract auditors Contributions to open-source projects in Web3 BONUS POINTS Proficiency with More ❯

of decentralized infrastructure initiatives. We're growing our team and are looking for a Blockchain QA Engineer to join us and become part of our journey. Our stack is Ethereum-like, so familiarity with - and passion for - the space is key. Some of the areas we tackle include blockchain infrastructure optimized for financial use-cases, protocols for specific applications (such … and maintaining cloud services such as AWS EC2, Google GCE, etc. Excellent written communication skills in English. FURTHER DESIRABLE SKILLS Ability to read and understand Golang code. Knowledge of Ethereum protocols and familiarity with EVM and Layer 1 blockchains. A robust understanding of blockchain fundamentals, including consensus algorithms. Experience with infrastructure deployment and automation tools like Ansible and Terraform. WHY More ❯

web3 libraries like ethers.js, viem, and web3.py for off-chain contract interactions Occasionally contribute to related tooling and scripting in Python and TypeScript Who You Are Strong understanding of Ethereum L1/L2 architecture and PoS mechanisms Familiar with blockchain primitives such as consensus algorithms and cryptography Deep knowledge of EVM internals: execution flow, memory/storage models, gas mechanics More ❯

Experience with secure coding practices and cryptographic principles. Strong analytical and problem-solving skills. Ability to work independently and in a fast-paced environment. Preferred Qualifications: Experience with EVM (Ethereum Virtual Machine) and Solidity. Knowledge of Solana Virtual Machine and Rust programming. Previous work in cryptocurrency trading, market making, or financial services. Experience with algorithmic trading systems. Contributions to blockchain More ❯

experience as a Technical Business Analyst, Data Analyst, or similar role, preferably in the blockchain or fintech industry. - Strong understanding of DeFi protocols, smart contracts, and blockchain technology (e.g., Ethereum, Solana, Layer 2 solutions). - Proficiency in data analysis tools (e.g., SQL, Python, Excel) and blockchain analytics platforms (e.g., Dune Analytics, Glassnode). - Experience with Agile methodologies and project management More ❯

automated validators, staking & DeFi protocols access, and comprehensive data and commission management. With $13+ billion in crypto assets staked through our platform, Kiln has established a strong presence on Ethereum, managing over 4.3% of the network through 45,000+ validators - all with zero slashing events. Kiln serves more than 140 leading customers, including Binance, BitPanda, Bitgo, Fireblocks, VanEck, and TrustWallet. More ❯

automated validators, staking & DeFi protocols access, and comprehensive data and commission management. With $13+ billion in crypto assets staked through our platform, Kiln has established a strong presence on Ethereum, managing over 4.3% of the network through 45,000+ validators - all with zero slashing events. Kiln serves more than 140 leading customers, including Binance, BitPanda, Bitgo, Fireblocks, VanEck, and TrustWallet. More ❯

Blockchain Developer - Web3/DeFi Innovator - London (Tech stack: Blockchain Developer, Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal, GoDot, Programmer, Full Stack Engineer, Architect, Blockchain Developer) We have an exciting new opportunity for a Blockchain Developer to join one of London … decentralised finance and digital ecosystems interact, using sophisticated Layer 2 scaling solutions and bleeding-edge tech. Our client is looking for a passionate Blockchain Developer with strong skills in Ethereum-based ecosystems. You will be joining a world-class engineering team, contributing across the full stack, from writing performant smart contracts to architecting scalable back-ends and beautiful user-facing … interfaces. They will provide exposure and training in: Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal and GoDot. This is your opportunity to be involved in building a brand-new decentralised application from the ground up, working in an agile, fast-paced More ❯

Blockchain Developer - Web3/DeFi Innovator - London (Tech stack: Blockchain Developer, Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal, GoDot, Programmer, Full Stack Engineer, Architect, Blockchain Developer) We have an exciting new opportunity for a Blockchain Developer to join one of London … decentralised finance and digital ecosystems interact, using sophisticated Layer 2 scaling solutions and bleeding-edge tech. Our client is looking for a passionate Blockchain Developer with strong skills in Ethereum-based ecosystems. You will be joining a world-class engineering team, contributing across the full stack, from writing performant smart contracts to architecting scalable back-ends and beautiful user-facing … interfaces. They will provide exposure and training in: Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal and GoDot. This is your opportunity to be involved in building a brand-new decentralised application from the ground up, working in an agile, fast-paced More ❯

Our backend engineering team develops architectures that are scalable from day 1, with no single points of failure. Smart Contracts: Primarily the ERC20 stack but across technologies such as Ethereum, Polygon, chainlink etc. Operations: Our AWS services are fully managed via infrastructure as code. We take cloud security, logging and monitoring seriously and use Bitbucket & Github CI/CD extensively. … due to the need for frequent communication and collaboration. Qualifications Smart contract deployments under the belt, whether in production or on testnets. 2+ years of experience working with go-ethereum project or fork of it. Alternatively, any other blockchain client. Good understanding of blockchain related cryptography (public key, BLS signatures, MACs, etc). Autonomy & ability to design complex systems. Passion More ❯

and intuitive gateway to the crypto and NFT ecosystems. Our users are able to send, receive, stake, mint and store across 10+ million cryptocurrencies on 100+ blockchains, including Bitcoin, Ethereum, BSC, Polygon, Solana etc. Our developer community of different projects relies on us to reach millions of their users, build their own wallets, and grow crypto adoption. Job Description We … ability to lead and inspire engineering teams, with a track record of successfully delivering complex technical projects. Hands-on experience with blockchain technologies, with at least deep knowledge in Ethereum, Bitcoin, smart contracts, and decentralized finance (DeFi) applications, and the broader industry landscape. Strong problem-solving skills, thinking strategically and translating business needs into technical solutions. Thrive in a fast More ❯

or Master’s degree in Computer Science, Engineering, or a related field. 7+ years in enterprise IT or software engineering, including 3+ years with blockchain/DLT. Proficient in Ethereum, Hyperledger, or comparable platforms. Hands-on experience developing smart contracts (e.g., Solidity) and integrating blockchain with enterprise systems. Familiarity with financial services, particularly in asset management and fund distribution. Proven More ❯

protocols. Proven track record of designing and implementing large-scale, distributed systems in a cloud environment (AWS preferred). Deep understanding and practical experience with multiple blockchain protocols (e.g., Ethereum, Bitcoin, Solana, Optimistic rollups, ZK rollups). Demonstrated ability to lead and mentor engineering teams, driving technical excellence and innovation. Strong architectural skills, with the ability to design and implement More ❯

or Master’s degree in Computer Science, Engineering, or a related field. 7+ years in enterprise IT or software engineering, including 3+ years with blockchain/DLT. Proficient in Ethereum, Hyperledger, or comparable platforms. Hands-on experience developing smart contracts (e.g., Solidity) and integrating blockchain with enterprise systems. Familiarity with financial services, particularly in asset management and fund distribution. Proven More ❯

or Master’s degree in Computer Science, Engineering, or a related field. 7+ years in enterprise IT or software engineering, including 3+ years with blockchain/DLT. Proficient in Ethereum, Hyperledger, or comparable platforms. Hands-on experience developing smart contracts (e.g., Solidity) and integrating blockchain with enterprise systems. Familiarity with financial services, particularly in asset management and fund distribution. Proven More ❯

scalable, high-performance backend systems. You will be responsible for designing and implementing RESTful and GraphQL APIs , working with microservices and AWS Lambda functions , and integrating with Solana and Ethereum blockchains .This role requires strong problem-solving skills, a deep understanding of backend development , and the ability to collaborate closely with frontend engineers, DevOps, and the product team . Communication … processes Work closely with the product team, frontend engineers, and DevOps to deliver high-quality features Monitor production backend systems to ensure stability and performance Integrate with Solana and Ethereum blockchains (Solana experience is highly important) Write unit and integration tests to ensure code quality and reliability Tech Stack Languages: Node.js , Golang Databases: DynamoDB with AppSync, PostgreSQL on AWS RDS … plus) AWS Services: Lambda, ECS, ECR, RDS, CloudWatch, SQS, SNS, SES, Cognito, Redis, S3, CloudFront Testing: Jest Blockchain: Solana (Helius RPC, Helius webhooks, Anchor framework, SPL token, Metaplex Core), Ethereum Requirements 3+ years of backend development experienceStrong experience with Node.js Experience building RESTful and GraphQL APIs Hands-on experience with AWS services (Lambda, ECS, RDS, etc.) Experience working with microservices More ❯

decentralized infrastructure initiatives. We’re growing our team and are looking for a Senior Python Software Engineer to join us and become part of our journey. Our stack is Ethereum-like, so familiarity with – and passion for – the space is key. Some of the areas we tackle include blockchain infrastructure optimized for financial use-cases, protocols for specific applications (such … experience in Python software development Bachelor’s degree in Computer Science or a related technical field Strong Python skills with experience in network and concurrent programming An understanding of Ethereum protocols and proof of stake consensus Experience developing REST APIs, backend services, and automated pipelines Proficiency with SQL databases, GraphQL sources, and time series data Good knowledge of Unix shell … your most relevant or significant projects? What were your contributions to those projects? What skills and technologies did you employ to achieve your goals? Please describe your level of Ethereum knowledge and relevant blockchain development experience. Briefly explain what makes you a great candidate for this position. #J-18808-Ljbffr More ❯

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 integration patterns (MetaMask, WalletConnect, etc.) Understanding of decentralised user flows and Web3 security best practices Experience working in cross-functional teams, especially More ❯

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 integration patterns (MetaMask, WalletConnect, etc.) Understanding of decentralised user flows and Web3 security best practices Experience working in cross-functional teams, especially More ❯

Web3 technologies, especially smart contracts, decentralized storage, and crypto economics. Solid experience with AI/ML infrastructure, GPU clusters, or compute-heavy environments is a big plus. Familiar with Ethereum, Cosmos, Solana, or other modern blockchain ecosystems. Experience managing remote and cross-functional engineering teams. Passion for open-source and decentralized infrastructure. Excellent communication and executive presence. Preferred Tech Stack More ❯

Web3 technologies, especially smart contracts, decentralized storage, and crypto economics. Solid experience with AI/ML infrastructure, GPU clusters, or compute-heavy environments is a big plus. Familiar with Ethereum, Cosmos, Solana, or other modern blockchain ecosystems. Experience managing remote and cross-functional engineering teams. Passion for open-source and decentralized infrastructure. Excellent communication and executive presence. Preferred Tech Stack More ❯

Web3 technologies, especially smart contracts, decentralized storage, and crypto economics. Solid experience with AI/ML infrastructure, GPU clusters, or compute-heavy environments is a big plus. Familiar with Ethereum, Cosmos, Solana, or other modern blockchain ecosystems. Experience managing remote and cross-functional engineering teams. Passion for open-source and decentralized infrastructure. Excellent communication and executive presence. Preferred Tech Stack More ❯

in automated testing at unit, integration and system level. Experience with CI/CD platforms, ideally gitlab. An Interest in crypto currencies and the leading blockchain technologies, such as Ethereum and Bitcoin. Experience in Fintech/Banking is highly desirable. What's in it for you? Our people are constantly striving to be the best through operational excellence. The professional More ❯