DeFi Software Engineer

Fionics; Greater London; On-site; GBP 90,000 - 150,000; Full time

Job summary

Fionics is hiring DeFi Software Engineers for a leading DeFi trading operation in London. The team is small and technically focused, offering a path toward trader/developer hybrids for those who want it.

Roles are pure individual-contributor positions with ownership of work end-to-end within a lean engineering team, in a fast-moving market with high-performance demands.

Qualifications

• Strong software engineering experience in trading/fintech/high-performance environments.
• Proficiency in C++, Java, C#, Rust or similar systems languages (no Python).
• Track record of shipping real systems via professional work or technical achievement.
• Candidates in short notice or with non-compete periods are welcome to apply.
• Engineers from outside crypto with strong engineering bar are welcome to apply.

Responsibilities

• Build and ship production systems powering live DeFi trading.
• Tackle technically demanding problems in a fast-moving market.
• Own your work end-to-end as a core member of a lean engineering team.

Skills

Software engineering

Production systems

Systems languages

Tools

C++

Java

C#

Rust

Job description

We're hiring DeFi Software Engineers for one of the leading DeFi trading operations in the world.

The team is small, technical, and operates at the top of the DeFi space. These are pure individual-contributor roles, with a genuine path toward trader/developer hybrid positions for those who want it.

What you'll do

• Build and ship production systems that power live DeFi trading
• Work on technically demanding problems in a fast-moving market
• Own your work end to end as a core member of a lean engineering team

What we're looking for

• Strong software engineering experience, ideally with production systems in a trading, fintech, or high-performance environment
• Proficiency in C++, Java, C#, Rust, or similar systems languages (this role does not use Python)
• A track record of shipping real systems, demonstrated through either professional experience or technical achievement
• Candidates currently within a short notice or non-compete period are well placed for this search
• Engineers from outside crypto (including top technology firms) are welcome where the engineering bar is met

Location

This role is fully on-site in London. The full team is based there. Remote arrangements are not available for this position.

Compensation

Competitive with the top of the market, commensurate with experience.