Solidity Engineer - Junior / Mid-Level in London

Solidity Engineer (London/Paris/Amsterdam)- Hybrid

We’re working with a crypto startup focused on on-chain securitisation who arelooking for a Solidity engineer to help build secure, scalable smart-contract systems that support real-world financial applications. You’ll work across the stack, contribute to key architectural decisions, and help shape reliable infrastructure used by both institutional and crypto-native users.

Responsibilities

• Develop upgradeable, gas-efficient, production-ready smart contracts.
• Build and maintain transaction indexing, monitoring, and reporting tools.
• Work closely with external auditors and take part in thorough security reviews.
• Integrate security best practices across all layers of development.
• Contribute to broader product architecture and technical decision-making.

Requirements

• 2 years of hands-on experience building advanced Solidity contracts and using modern tooling (Foundry, established patterns, EIPs, etc.).
• Strong security mindset.
• Solid understanding of Git workflows and CI/CD pipelines.
• Strong analytical skills, attention to detail, and a focus on reliability.

What You’ll Get

• Competitive pay.
• Ability to take on meaningful ownership and grow with the team.
• Flexible hours and remote-friendly culture.
• Supportive, technically driven environment.
• Exposure to cutting-edge blockchain and financial-infrastructure work.