Senior Software Engineer

Design and Build:

• →Own a defined part of our next-generation trading platform, from design through release.
• →Design for failure: durability, failover and recovery.
• →Keep business logic deterministic and testable in isolation, separate from the code that sends messages.

Verify and Review:

• →Create discrete tasks with executable acceptance criteria from business specifications.
• →Build checks that are independent of the implementation.
• →Share code review with the team’s existing reviewers.

AI Tools and productivity:

• →We use Claude Code; fluency with it or similar is expected.
• →Work with the team to develop shared agent practice.
• →Be ready to show us how you actually work with these tools; it’s part of the interview.

Support: 

• →Take part in the production support rotation.

• 5+ years of professional software engineering, including designing systems where failure has serious financial or regulatory consequences.
• Strong programming and critical code review in statically typed, compiled languages, including C++.
• Production software shipped using AI coding agents, with a method you can explain.
• Experience designing tests that check correctness independently of the implementation.
• Able to turn a business specification into discrete tasks with clear acceptance criteria.
• Basic working use of Python and SQL; deeper experience is a plus.
• Clear communication: you say what you have and have not verified.
• Experience with trading systems or financial markets is a plus.

You will work on the platform that runs the business today and on its replacement, where the design is still open. The team is small, the work is consequential, and good engineering judgment is what we value most.