Core System Engineer (Python)

Join a lean, highly effective engineering team powering one of the most advanced digital-asset trading infrastructures. Our client marries the high-performance engineering standards of traditional quantitative trading with the agility and innovation typical of a tech startup. Their digital-asset platform isn't just another asset class, they're building what’s next in compliant, scalable trading infrastructure.

You’ll be embedded within a tight-knit Core Development team, working across diverse and impactful domains:

• Ingest and expose trading activity data from multiple global exchange venues into internal systems.
• Build and maintain a high-performance reconciliation engine delivering near-real-time positions, alerts, and reporting.
• Develop the front-end interface used daily by traders.
• Automate settlement workflows with direct liquidity partners (beyond centralised exchanges).
• Support tooling and storage systems used by quantitative researchers for machine-learning features.

You’re a pragmatic, passionate engineer who writes clean, efficient code. You thrive in flat, collaborative environments and work well alongside cross-functional partners (traders, C++ engineers, researchers, middle office, DeFi teams).

• Must-have: Minimum 2 years of experience in Python 3 development.
• Bonus: Experience in C++ for high-performance work.
• Proficient with SQL databases (preferably PostgreSQL).
• Comfortable working in Linux environments (both servers and desktops).
• Interest in finance or crypto a plus—but not mandatory.

• Ownership of high-stakes, high-impact systems—far more responsibility and visibility than traditional roles.
• Work in a vibrant and informal environment featuring team events, gaming socials, and regular celebrations.
• A centrally located London office with flexible desk configs, breakout areas, games (think table tennis and foosball), and communal zones.
• Flat structure that rewards merit and output over titles.
• Competitive total compensation includes a meaningful performance-based component.
• Standard UK benefits package (pension, private health, etc.).
• Relocation assistance and support with UK work visas are available.
• Fully remote candidates cannot be considered, but significant flexibility around hybrid and hours is supported.

If you love clean engineering, solving tough problems, and building systems that scale and matter—this is an exceptional opportunity to work at the intersection of tech and finance, in a culture that values autonomy, collaboration, and innovation.