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May 5, 2026

Senior .NET Developer – Banking and Financial Solutions

Senior • Hybrid

16,800 - 21,840 PLN

Warsaw, Poland

Innovate online banking and join the team as a Senior .NET Developer!

Warsaw-based opportunity with hybrid work model (2 times in the office/month).

As a Senior .NET Developer, you will be working for our client, one of the leaders in online banking, supporting the development and maintenance of secure, high-performance financial solutions. You’ll be contributing to a team responsible for building and enhancing banking functionalities, ensuring reliability and innovation. Working in a distributed Agile environment, you’ll play a key role in both implementing complex backend logic and actively collaborating with cross-functional teams. 

Your main responsibilities:

  • Design and develop new features in .NET 8
  • Implement and optimize SQL-based data access
  • Build and maintain containerized applications using Docker and Kubernetes
  • Collaborate with distributed teams in an Agile environment
  • Participate in the development of secure payment solutions
  • Share knowledge and support less experienced team members
  • Ensure code quality through code reviews and testing
  • Maintain existing functionalities and resolve production issues
  • Manage your own time and responsibilities while working remotely

You're ideal for this role if you have:

  • Strong experience in developing IT systems (min. 4 years of experience)
  • Solid hands-on experience with .NET
  • Strong knowledge of PostgreSQL and MS SQL
  • Practical understanding of Agile software development
  • Excellent communication and collaboration skills in distributed teams
  • Ability to work independently and manage your time effectively
  • Experience in developing new features and maintaining existing ones
  • A passion for software development and continuous learning
  • Experience with Docker and Kubernetes

Nice to have:

  • Knowledge of banking domain such as payments and transactions (e.g. Elixir, Sorbnet)