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Web3 Software Engineer

Startup Talents

London, City of London, United KingdomPermanentPosted Dec 4, 2025

Job description

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 shared apps. It is an interoperable, low cost, quick to build, easy to manage, copilot-friendly and platform independent platform. MISSIONS : Your role will be to ship code, iterate with customers, and join us in prototyping next-gen products and protocols.

This role could grow into an leading research role, senior architect role or engineering executive role as Tonk grows. Core responsibilities include: Implementing cutting-edge cryptographic systems across diverse tech environments. Designing and architecting protocols. Secure and efficient smart contract development. Frontend development.

Profil

  • Agility to touch all parts of the stack, from frontend to database and distributed systems.
  • Familiarity with applied cryptography, including hash functions, encryption schemes, proof schemes, etc, as well as the mathematical education to back it up.
  • Expertise in designing and deploying distributed systems.
  • Deep understanding of relevant protocols and the general landscape of blockchain infrastructure.
  • Expertise deploying smart contracts to mainnet.
  • Prior work on software dev infra and tooling.
  • Apps generated by the platfor, come pre-bundled with React, Typescript, Tailwind. Ideally you can also work with Rust, Solidity, Go and Javascript.
  • You have a personal portfolio site and/or active Github with active projects and links to projects to show A plus :
  • Ideally you have experience in web technologies, distributed systems, cryptography
  • Ideally you have worked on a notable product / project
  • Ideally you have contributed to FOSS
  • Ideally you have worked on a startup as founding engineer Informations contractuelles Contract : Permanent Location : London ( full time on site office ) Salary : 70 to 130k USD Benefits : Competitive salary + equity + token rights + Paid travel + personal wellness budget + Generous equipment budget + 20 days PTO on top of 8 UK bank holidays + Private health & dental insurance Recruitment process : HR Call + CTO Interview + Technical Interview

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