Web3 Software Engineer

Startup Talents; Greater London; On-site; GBP 51,000 - 96,000; Full time

Job summary

An innovative crypto startup in London is seeking a talented developer to create cutting-edge cryptographic applications. Your role will involve shipping code, collaborating with customers, and prototyping next-gen products. Ideal candidates will have expertise in distributed systems, smart contract development, and a strong understanding of cryptographic protocols. This position offers competitive compensation, equity, and generous benefits including paid travel and personal wellness budget.

Benefits

Competitive salary

Equity

Token rights

Paid travel

Personal wellness budget

Generous equipment budget

20 days PTO plus 8 bank holidays

Private health & dental insurance

Qualifications

• Experience with cryptographic systems and architectures.
• Understanding of blockchain protocols.
• Personal portfolio showcasing previous projects.

Responsibilities

• Ship code and iterate with customers.
• Prototype next-gen products and protocols.
• Implement cryptographic systems.

Skills

Agility in full-stack development

Applied cryptography

Distributed systems expertise

Smart contract deployment

Experience with web technologies

Tools

GitHub

Job description

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 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.

Requirements

• 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.
• You have a personal portfolio site and/or active Github with active projects and links to projects to show.
• 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.

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