Expert/Senior .NET Developer

Net

n/a, Warszawa+2 Locations

B2Bnetwork

130 - 150PLN

Net per hour - B2B

Full-time

B2B

Senior

Hybrid

Tech stack

English

C1

SQL Server

advanced

ASP.NET

advanced

API Development

advanced

C#

regular

.Net

regular

SQL

regular

Job description

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)

Published: 13.08.2025

Office location