
C# (.NET) Developer (approx. 3 months)
- Remote
- Warsaw, Mazowieckie, Poland
- High Code
Job description
Sourceful ICT, part of IG&H, creates custom applications that help our clients stand out and make an impact. We believe in first understanding our clients to build real partnerships. Our goal is to turn complex business needs into secure, scalable solutions with a focus on user experience. Our development process is a team effort with multiple stages, from identifying key features in the customer journey to creating wireframes and mock-ups. We work with clients to turn these ideas into a clear development plan, ready for building. We are a certified OutSystems partner.
We’re currently looking for a C# API/.NET Developer to join us immediately for a fixed-term migration project (until the end of 2026).
Job requirements
What you will do:
Migrate the existing application to new technology stack using C#/.NET
Develop and enhance RESTful APIs and backend services
Collaborate with Product Owners, Business Analysts, QA Engineers, and other Developers to deliver high-quality solutions
Participate in architectural discussions and technical decision-making
Perform code reviews and promote development best practices
Troubleshoot, debug, and optimize application performance
Contribute to CI/CD pipelines and deployment processes
Create and maintain technical documentation
What you will bring:
5+ years of experience as a Back End Developer using C#
Strong experience with:
C# / .NET 8+
SQL Server – T-SQL, reading an existing schema, stored procedures
Experience with migration projects
Experience developing and consuming REST APIs
Understanding of software development principles, design patterns, and object-oriented programming
Familiarity with source control systems such as Git
Experience working in Agile/Scrum environments
Familiarity with AI tools such as Claude or Codex
Strong analytical and problem-solving skills
Good communication skills in English
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