Senior C# Trading Systems Engineer

Technologies we use

About the project

This is how we organize our work

This is how we work

Your responsibilities

• Design and implement robust software solutions for FX trading systems using C# .NET.
• Collaborate with other teams to research and implement changes to the trading system.
• Create thorough test cases to ensure software stability and reliability.
• Collaborate with operations teams regarding building new features and improving existing functionality.
• Support production issues, including independently completing root-cause analysis and diagnosis.
• Process business requirements with minimal guidance, derive implementation proposals, and implement them with a team or individually.
• Mentor junior developers.

Our requirements

• 7+ years of professional C# .NET development experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries.
• Good knowledge of the data structures: familiarity with the .NET collections library, depth of understanding of the commonly used data structures, and intuition on what to use when.
• Proven experience building backend services for front-office trading systems.
• Deep understanding of front-office workflows and electronic trading platforms (any asset class).
• Built or contributed to the development of an electronic trading system (any asset class).
• Expertise in multi-threading, event-driven systems, and performance tuning.
• Ability to break down complex workflows into maintainable, high-quality solutions.
• Strong communication skills and comfort working in high-stakes, trader-facing environments.
• Knowledge that is required for building low-latency (measured in microseconds) trading systems.
• Familiarity with the FIX protocol.
• Ability to align your work with a 6-hour overlap with US Eastern business hours.

Optional

• Familiar with Broadway FX.
• Familiar with Java.
• A computer science degree from a top Polish school.

What we offer

• Work that matters in the financial domain: You’ll be building a high-performance trading system at an established financial institution.
• Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment.
• Direct collaboration: You will work directly with the client team in North America and in Poland.
• 1st-tier work: This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team.
• Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term.
• Flexibility & remote work: Fully remote position based in Poland.
• Competitive Compensation: Top pay and ample time-off options.

Why Join Us?