Senior C# Developer with Fintech experience

Margo Group; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Senior C# Developer position at a global financial institution. You will join an international team developing core systems in XVA, Liquidity, and Financial Resource Management, migrating to a modern event-driven back-end architecture. The role supports hundreds of users in a dynamic market environment within an agile, clean-code culture.

Your work requires autonomy, strong teamwork, and proactive problem solving in a high-stakes front-office IT setting.

Qualifications

• High autonomy with strong teamwork.
• Excellent communication, analytical, and organisational skills.
• Attention to detail under time pressure.
• Proactive, flexible approach to daily engineering challenges.
• Motivation to work directly with front-office IT.
• Integrity and discipline.
• Role model supporting a culture of good conduct.
• Proactivity, transparency, and accountability in managing conduct risks.
• Considering the impact of decisions on colleagues, partners, and clients; escalation in case of doubts.

Job description

On behalf of our client – a global financial institution – we are looking for an experienced specialist for the position of Senior C# Developer.

ABOUT THE PROJECT & TEAM:

You will join a distributed, international team responsible for the development of core systems in the areas of XVA, Liquidity, and Financial Resource Management. The project is currently at an exciting turning point – migrating to a modern, highly advanced event-driven architecture on the back-end side. The developed UI tools support the daily operations of hundreds of users in a dynamic market environment. We work in a collaborative, agile environment with a strong emphasis on clean code and software craftsmanship.

CONDUCT & ATTITUDE EXPECTATIONS:

• High autonomy combined with excellent teamwork skills.
• Excellent communication, analytical, and organisational skills.
• Attention to detail (especially under time pressure).
• Proactive, flexible approach to daily engineering challenges.
• Motivation to work directly with front-office IT.
• Integrity and discipline.
• Role model supporting a culture of good conduct.
• Proactivity, transparency, and accountability in managing conduct risks.
• Considering the impact of decisions on colleagues, partners, and clients; escalation in case of doubts.