Staff Software Engineer, Core Exchange · Core Exchange

Sat, 25 Apr 2026 20:52:17 GMT
Engineering

Core Exchange · Ljubljana, Slovenia · onsite

Join us in building the future of finance.

Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading.

Our Core Exchange team is responsible for all trading interfaces , including the Exchange REST API, FIX API, WebSockets, and market data services. The team’s mission is to deliver a best-in-class trading experience for API users, with a relentless focus on latency, reliability, and data correctness.

As a Staff Software Engineer, you will help scale our trading infrastructure to meet the evolving needs of our most sophisticated users. This is a high-impact role for engineers who love low-latency systems, deeply care about precision, and want to directly shape the tools used by active traders worldwide.

Responsibilities:

Design and build performant, reliable, and scalable services for our API trading ecosystem.

Optimize low-latency data flows and trading paths, ensuring correctness under pressure.

Own and evolve core components of our REST, FIX, and WebSocket APIs.

Collaborate with product, infrastructure, and frontend teams to deliver seamless API solutions.

Participate in the team’s on-call rotation, supporting mission-critical systems used by our most active clients.

Continuously measure, monitor, and improve the trading API experience.

What you bring:

10+ years of backend engineering experience.

Proven experience designing high-performance systems with low-latency and high-throughput requirements.

Familiarity with cloud infrastructure, especially AWS services.

Solid database experience: SQL (MySQL) and/or NoSQL (DynamoDB).

Experience working on or with production-grade trading APIs or high-volume systems.

Structured thinker with strong communication skills and a customer-first mindset.

Nice to have:

You’ve built or operated your own automated trading bot or trading system.

Hands-on experience with the FIX protocol and order management systems.

Knowledge of WebSockets, streaming market data, or real-time API performance tuning.

Passion for financial markets and an interest in building tools for professional traders.