1 to 25 of 44 web3js Jobs in London

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 ...

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 ...

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 ...

London, United Kingdom | Posted on 30/04/2026 The employer is a cryptocurrency launchpad for the Solana blockchain that enables users to create tokens and trade them immediately on the platform, as well ...

Location United Kingdom; London Employment Type Full time Location Type Remote Department R&D InfoSec About Chainalysis Blockchain technology is powering a growing wave of innovation. Businesses and governments around the world are using blockchains ...

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 ...

Senior Software Engineer, Block Production - Anza Who We Are Anza is a Solana R&D lab pushing the boundaries of blockchain performance and scalability. Anza was founded by experienced executives and core engineers solving the ...

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

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 ...

Blockchain Technology and Innovation Blockchain technology is powering a growing wave of innovation. Businesses and governments around the world are leveraging this technology to drive economic growth and streamline operations. At Chainalysis, we are at ...

Blockchain Technology and Innovation Blockchain technology is powering a growing wave of innovation. Businesses and governments around the world are leveraging this technology to drive economic growth and streamline operations. At Chainalysis, we are at ...

Senior Data Engineer Data, Analytics & Indexing Remote £100k – £200k Plexus is partnering with a leading Web3 data platform offering an exciting opportunity to join one of the most respected teams in the digital asset ecosystem. ...

Frontend Engineer London, UnitedKingdom Posted 10 months ago This is a job posted by our partner Jooble Tech stack JavaScript Next.js React Redis DataDog Frontend GitHub PostgreSQL TypeScript Node.js Google Cloud Platform Below is ...

Note: By applying to this position you will have an opportunity to share your preferred working location from the following: Frankfurt, Germany; Munich, Germany; London, UK . Minimum qualifications: Bachelor’s degree or equivalent practical ...

Develop and audit secure smart contracts for DeFi protocols and Web3 applications. Expertise in Solidity, Vyper, and blockchain security best practices. Experience with DeFi protocols and tokenomics design. 8+ years smart contract development required. WHY ...

Circle (NYSE: CRCL) is one of the world’s leading internet financial platform companies, building the foundation of a more open, global economy through digital assets, payment applications, and programmable blockchain infrastructure. Circle’s platform ...

GTM Strategy & Operations Senior Manager London, UK Please note this is for London, UK. You only need to apply to one location if there are multiple listed for the job. Apply Now At Ripple, we ...

Blockchain is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011, Blockchain ...

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 Us For nearly a century, our client has been building a firm as accountants, auditors, tax specialists and close advisors to clients operating in emerging markets, disrupting the status quo. This has accelerated thanks ...

Remote (Worldwide) • Contract • $50–150/hr We are building the first blockchain-based pet ecosystem in Brazil. 160M pets. $60B market. Zero blockchain infrastructure today. Web2 platform is 75% complete. Now building Web3 layer ...

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 ...