1 to 25 of 48 web3js Jobs in London

strict standards for reliability, scalability, and performance Strong proficiency in asynchronous programming paradigms and event‐driven architecture patterns Working knowledge of Web3 libraries (Web3J, Web3JS) and their application in enterprise contexts Demonstrated familiarity with Solidity and smart contract development best practices Solid understanding of DevOps principles, containerized application deployment ...

Experience and expertise developing web applications adhering to best practices and patterns for reliability, scalability, and performance* Familiarity with web3 libraries like Web3J and Web3JS is a plus* Familiarity with common and best practices for web3 applications is a plus* Familiarity of Solidity code and best practices ...

Experience and expertise developing web applications adhering to best practices and patterns for reliability, scalability, and performance Familiarity with web3 libraries like Web3J and Web3JS is a plus Familiarity with common and best practices for web3 applications is a plus Familiarity of Solidity code and best practices ...

test, and audit smart contracts written in Solidity or equivalent languages, ensuring security, correctness, and gas efficiency Integrate Web3 libraries and SDKs (e.g., Web3J, Web3JS, Ethers.js, Viem) into enterprise Java and/or Node.js backend services Implement asynchronous, event-driven architectures to handle on-chain events, transaction lifecycle management … Solidity smart contract development, including testing frameworks (Hardhat, Foundry, Truffle) and security best practices Hands-on experience with Web3 libraries such as Web3J, Web3JS, Ethers.js, or Viem Solid understanding of blockchain fundamentals — consensus mechanisms, transaction lifecycle, gas models, wallet infrastructure, and key management Experience with token standards ...

test, and audit smart contracts written in Solidity or equivalent languages, ensuring security, correctness, and gas efficiency Integrate Web3 libraries and SDKs (e.g., Web3J, Web3JS, Ethers.js, Viem) into enterprise Java and/or Node.js backend services Implement asynchronous, event-driven architectures to handle on-chain events, transaction lifecycle management … Solidity smart contract development, including testing frameworks (Hardhat, Foundry, Truffle) and security best practices Hands-on experience with Web3 libraries such as Web3J, Web3JS, Ethers.js, or Viem Solid understanding of blockchain fundamentals - consensus mechanisms, transaction lifecycle, gas models, wallet infrastructure, and key management Experience with token standards ...

Experience and expertise developing web applications adhering to best practices and patterns for reliability, scalability, and performance Familiarity with web3 libraries like Web3J and Web3JS is a plus Familiarity with common and best practices for web3 applications is a plus Familiarity of Solidity code and best practices ...

Job Title: Blockchain/DLT Developer Location: Ipswich, London or Remote As a Blockchain Developer at MACH, you will play a central role in designing, building, and deploying distributed ledger and smart contract solutions for ...

Blockchain/DLT Developer London - Hybrid/Remote Permanent £90,000 - £110,000 We are looking for an experienced Blockchain/DLT Developer to join a growing technology team delivering innovative blockchain solutions within the ...

Blockchain/DLT Developer If the following job requirements and experience match your skills, please ensure you apply promptly. London - Hybrid/Remote Permanent £90,000 - £110,000 We are looking for an experienced Blockchain ...

Behind every investment is a person with ambitions, motivations and values. While we know that every client is unique, they come to J.P. Morgan Personal Investing for the same reason: our straightforward and transparent approach ...

Software Engineer Build and scale APIs and data layers for cryptocurrency crime prevention and risk understanding. Location: London Job Tags: Software About The Role The engineering team at Chainalysis is inspired by solving the hardest ...

CoinDesk is the most trusted media, events, indices and data company for the global crypto economy. Since 2013, CoinDesk Media has led the story of the future of money and investing, illuminating the transformation in ...

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments ...

About Uphold Uphold is a financial technology company that believes on-chain services are the future of finance. We provide modern infrastructure for on‐chain payments, banking and investments. Offering Consumer Services, Business Services and ...

About Ledger We're a team of experts pushing the limits of what's possible, united by our common goal to unlock true freedom through digital ownership, making technology accessible for all. We believe in ...

Join Binance, a leading company at the intersection of technology, finance, and crypto. This is a fast-paced, demanding role for independent, proactive, energetic, and tenacious individuals who are ready to roll up their sleeves ...

Fireblocks is the company bringing global finance onchain. Backed by over $1 billion in capital, we are the premier digital asset infrastructure provider trusted by thousands of industry-defining financial institutions, including banks, payment providers ...

Citi is seeking a Blockchain Software Developer to join the Digital Assets Platform engineering team. This role focuses on building Web3-native components, on-chain integrations, and scalable backend services for institutional digital finance use ...

About Merkle Science: Merkle Science provides blockchain transaction monitoring and intelligence solutions for web3 companies, digital asset service providers, financial institutions, law enforcement and government agencies to detect, investigate and prevent illicit use of cryptocurrencies. ...

Appold is an independent blockchain technology and advisory company. We advise the full spectrum of companies within the blockchain industry, from major financial institutions through to Web3 Foundations, on all areas of blockchain technology-related ...

London, United Kingdom | Posted on 12/04/2025 The employer is an early stage Crypto startup developing a toolchain for shared, just‐in‐time applications that gives independent developers freedom to build powerful ...

Love technology, coding, AI and cryptocurrency but want a professional career? Join one of the UK's leading digital asset accounting teams, working with crypto exchanges, blockchain companies and Web3 startups while qualifying as a ...

Citi London is seeking a Lead Web3 Engineer to join the Digital Assets Platform. You will develop backend components linked to blockchain networks, implement wallet interactions, and deploy smart contracts in a fast-paced, enterprise ...

As part of the Fireblocks sales team, you will play a meaningful role in scaling one of the fastest-growing companies in the Blockchain and Cybersecurity field. You’ll target a mix of Crypto Native ...

The world of digital assets is accelerating in speed, magnitude, and complexity, opening the door to new ways for leveraging the blockchain. Fireblocks’ platform and network provide the simplest and most secure way for companies ...