1 to 25 of 42 Permanent ethers.js Jobs in England

EVM) or Rust (SVM). Familiarity with Ethereum, Solana, or similar blockchain ecosystems, and tools like Hardhat, Foundry, Anchor, etc. Experience working with Web3 libraries and tools such as ethers.js, web3.js, or wagmi. A strong sense of ownership and the ability to drive projects independently. Ability to navigate ambiguity and work effectively in a fast-changing environment. Commitment to code More ❯

EVM) or Rust (SVM). Familiarity with Ethereum, Solana, or similar blockchain ecosystems, and tools like Hardhat, Foundry, Anchor, etc. Experience working with Web3 libraries and tools such as ethers.js, web3.js, or wagmi. A strong sense of ownership and the ability to drive projects independently. Ability to navigate ambiguity and work effectively in a fast-changing environment. Commitment to code More ❯

This role is with a Calyptus partner. Responsibilities Ship the first version of the companies web application, starting from designs. Build a landing page that converts visitors into users. Implement the trading interface for minting, redeeming, and managing Leveraged Tokens. More ❯

This role is with a Calyptus partner. Responsibilities Ship the first version of the companies web application, starting from designs. Build a landing page that converts visitors into users. Implement the trading interface for minting, redeeming, and managing Leveraged Tokens. More ❯

3. Familiarity with Blockchain Experience with blockchain technologies, including: Proficiency in client-side signing and handling crypto transactions (e.g., Bitcoin, Ethereum). Familiarity with Web3 libraries (such as web3.js, ethers.js) and wallet integrations. Experience with decentralized applications (dApps) and understanding of blockchain protocols. #J-18808-Ljbffr More ❯

systems (architecture, design patterns, reliability, and scaling) Problem-solving mindset, able to tackle challenges and optimize solutions in a fast-paced environment Nice-to-Haves Experience with web3 libraries (ethers.js, go-ethereum, etc.) Familiarity with Hexagonal Architecture Experience within a trading environment Must be a UK Citizen Company Culture and Values Ambition: We aim to conquer an impactful place in More ❯

core (BTC/LTC) nodes—manage UTXO sets, fee estimation, mempool monitoring, and wallet RPCs for high-volume deposit and withdrawal flows. Build and maintain Ethereum transaction pipelines using ethers.js —handle ERC-20/ERC-721 token transfers, reorgs, transaction signing/broadcasting, and nonce management. Integrate additional L1/L2 networks by abstracting blockchain-specific logic behind a unified … Strong understanding of blockchain fundamentals, especially UTXO vs. account-based models Hands-on experience with Ethereum, Bitcoin, and L2s (e.g., Arbitrum, Optimism, Polygon) Familiarity with Web3 libraries such as ethers.js , web3.js , and experience interacting with RPC APIs Deep understanding of secure wallet management practices and MPC technology Proficiency in front-end development using React and Web3 provider integrations Experience in More ❯

Conduct and support security audits, addressing vulnerabilities and integrating best practices Collaborate closely with protocol engineers to support integrations across L1 and L2 chains Work with 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 … with exposure to Yul, Vyper, or Huff (a plus) Solid grasp of DeFi concepts: DEXes, lending protocols, stablecoins, and staking mechanisms Proficient with Foundry, Hardhat, and comfortable working with ethers.js, web3.js, viem, or web3.py Strong security mindset, familiar with common attack vectors and the auditing process Practical coding experience in Python and JavaScript/TypeScript Nice to Have Experience in More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

development (including 2+ years on live smart contract deployments) Deep understanding of EVM architecture, blockchain consensus, gas mechanics, and DeFi primitives. Proficiency with Solidity and tools 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 More ❯

Minimum 3 years of DeFi development experience working with EVM, Solana, and other blockchain ecosystems. Minimum 3 years experience using JavaScript/TypeScript, NodeJS, and relevant SDKs (e.g. web3.js , ethers.js ). Deep understanding of Smart Contracts, AMM, Farming, etc. Experience with websocket programming. Experience with Linux system programming. Good to have: Trading system experience in connectivity, model pricing. Good to More ❯

the ability to work quickly, efficiently, and to multitask Desire and ability to innovate and improve upon current processes Positive attitude and a team player Experience with web3.js or ethers.js, and developing DeFi applications and/or FinTech applications is a plus #J-18808-Ljbffr More ❯

architecture, design patterns, reliability, and scaling). Problem-solving mindset, able to tackle challenges and optimize solutions in a fast-paced environment. Nice-to-Haves Experience with web3 libraries (ethers.js, go-ethereum, etc.). Familiarity with Hexagonal Architecture. Experience within a trading environment. Must be a UK Citizen. Company Culture and Values At Flowdesk, our culture drives our success. Here More ❯

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 More ❯

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 More ❯

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 More ❯

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 More ❯