Senior C# Developer for FinTech Backend (Event-Driven)

MARGO; Polska; On-site; PLN 180,000 - 240,000; Full time

Job summary

MARGO is assisting a global financial institution in finding a Senior C# Developer to join an international team focused on core back-end systems for XVA, Liquidity, and Financial Resource Management. The role emphasizes modern event-driven architecture and high-quality, scalable code.

You will work in an agile, collaborative environment with front-office IT contact, contributing to critical daily operations and delivering robust software in a fast-paced market setting.

Responsibilities

• 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.

Job description

MARGO is assisting a global financial institution in finding a Senior C# Developer to join an international team focused on core back-end systems for XVA, Liquidity, and Financial Resource Management. The role emphasizes modern event-driven architecture and high-quality, scalable code.

You will work in an agile, collaborative environment with front-office IT contact, contributing to critical daily operations and delivering robust software in a fast-paced market setting.