Senior C# Developer with Fintech experience

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  • Company MARGO
  • Employment Contract
  • Location 🇵🇱 Poland
  • Submitted Posted 23 hours ago - Updated 5 hours ago

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.


170 zł - 230 zł an hour

⚙️ TECH STACK:

  • Language & Frameworks: C# .NET, Windows Services, ASP.NET Web API, SignalR

  • Communication: Asynchronous message-driven communication (Rebus)

  • Databases & ORM: MS SQL, ORM (Dapper)

  • Tools & DevOps: GIT (Bitbucket), TeamCity, Jenkins, Ansible

🎯 REQUIRED TECHNICAL COMPETENCIES:

  • Deep understanding & experience: OOP, patterns, principles.

  • Deep understanding & experience: .NET C# and its ecosystem.

  • Deep understanding & experience: service-oriented architectures.

  • Deep understanding & experience: MS SQL.

  • Demonstrable experience: DevOps tools.

  • Understanding of LLM capabilities in software development; practical experience with agentic AI engineering in an enterprise environment.

💼 FUNCTIONAL / FINANCIAL KNOWLEDGE: Candidates are required to have expertise in at least 2 areas from the following list:

  • Financial products (Listed / OTC)

  • PnL Explain, risks (Delta, Gamma, Theta, Vega...)

  • XVA (CVA, FVA, ColVA...)

  • Liquidity Risk (RNFB, NSFR...)

  • Cash Forecasting

  • Balance Sheet Metrics (Leverage Exposure...)

  • Pre-trade calculation and booking workflow

🌟 NICE TO HAVE:

  • Web development experience: HTML, JavaScript / TypeScript, React, Redux.

💡 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.

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