Senior Full-Stack Engineer (Web3)

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time.

We are seeking a proactive and skilled Senior Full-Stack Engineer to join our lean, high-impact team and help shape the future of Web3. You’ll dive deep into building innovative financial and crypto-native products, services, and APIs, playing a pivotal role in delivering cutting-edge onchain solutions.

This role is ideal for engineers who are passionate about Web3 and who thrive in fast-paced, high-ownership environments.

As a senior member of the team, you’ll take on complex technical challenges across the entire stack—from crafting performant user interfaces to architecting backend services, as well as writing smart contracts that power next-generation financial products. You’ll work closely with product managers, designers, and fellow engineers to build intuitive, secure, and performant Web3 experiences.

WHAT YOU WILL DO

• Design, develop, and maintain full-stack Web3 applications—ranging from user interfaces and APIs to smart contracts and blockchain integrations.
• Implement smart contracts using languages such as Solidity (EVM) or Rust (SVM), and ensure they are secure, tested, and optimized for performance.
• Collaborate cross-functionally with engineers, designers, and product stakeholders to define, prototype, and deliver features end-to-end.
• Take ownership of the entire software lifecycle—scoping, implementation, testing, deployment, and maintenance.
• Integrate blockchain protocols and wallets to enable seamless Web3 user experiences.
• Leverage the latest AI tools (e.g., for code generation, documentation, or test coverage) to enhance productivity, accelerate delivery, and maintain high code quality.
• Stay up to date with the rapidly evolving blockchain ecosystem and bring best practices into the team.

WHAT YOU WILL NEED

• Proven experience building and shipping Web3 applications to real users.
• Strong command of frontend technologies, including React and modern JavaScript/TypeScript tooling.
• Deep knowledge of backend development, including RESTful APIs, databases, and secure infrastructure practices.
• Hands-on experience with smart contract development in Solidity (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 quality, including writing unit/integration tests and applying engineering best practices.

COMPENSATION & PERKS

• Full-time salary based on experience and meaningful equity in an industry-leading company
• This is a hybrid role based in our London office, with a mandatory in-office presence three days per week.
• Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year.
• ClassPass
• Budgets for learning & professional development
• Unlimited vacation policy; work hard and take time when you need it
• Apple equipment
• The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field
• Flexible work culture