Expert/Senior .NET Developer

Senior • Hybrid

130 - 150 PLN

Warsaw, Poland

We’re looking for an Expert/Senior .NET Developer to join a long-term project for a leading client in the banking industry.

Project Type: Enterprise banking systems – backend & API development, code optimization, and mentorship

Responsibilities:

Design, develop, and maintain software solutions
Analyze, refactor, and troubleshoot legacy code
Conduct code reviews and uphold high-quality standards
Collaborate with QA and Business Analysts
Mentor junior developers and provide technical leadership

Must-Have Experience:

Strong knowledge of C# and the .NET framework
Expertise in ASP.NET Core and API development
Experience with SQL Server (design & development)
Ability to work with and troubleshoot legacy code
Solid understanding of OOP and software engineering best practices

Nice-to-Have:

Familiarity with Git, Jenkins, and testing frameworks
Understanding of cloud concepts & web security best practices
Knowledge of frontend technologies (Angular, HTML, CSS, JavaScript)

Tools & Tech Stack:Visual Studio, Postman, Swagger, Bitbucket, SQL Server Management Studio, T-SQL, Bootstrap (or similar)

B2Bnetwork

B2Bnetwork appears to be a technology-focused company operating in the business-to-business (B2B) sector. It specializes in building modern, scalable software solutions, with an emphasis on microservices architecture and contemporary web technologies. The company demonstrates a strong commitment to industry best practices, clean documentation, reusable design systems, and high-quality user interface standards. Its collaborative approach to development and focus on configurable, standardized platforms suggest a mission centered on delivering efficient, adaptable digital solutions for business clients.

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