Back End Developer - C# /.NET

Back End Developer C# /. NET

We’re hiring a skilled Back End Developer for our team at QUANTEAM – RAINBOW PARTNERS Group in Portugal.

Key responsibilities and qualifications:

• Design and implement solutions using . NET and SQL Server
• Develop, maintain, and optimize efficient, reusable, and reliable code
• Ensure high performance, quality, and responsiveness of applications
• Identify and resolve bottlenecks, bugs, and technical issues
• Maintain code quality, enforce best practices, and support team collaboration
• Contribute to application architecture and continuous improvement initiatives
• Strong experience with . NET Framework and . NET Core (3. 1+) up to. NET 8
• Skilled in C# backend programming and applying SOLID principles
• Hands‑on experience with Entity Framework / EF Core
• Knowledge of event‑driven architecture (Rabbit
  MQ, Mass
  Transit)
• Experience with API Gateways (Ocelot)
• Solid practice in unit and integration testing (Xunit, NSubstitute)
• Agile mindset with focus on craftsmanship and clean coding practices
• Good to have: exposure to CI/CD tools (Azure Pipelines, XLDeploy, XLRelease), code quality/security tools (Sonar
  Qube, Checkmarx), and end‑to‑end testing

Seniority Level

Mid‑Senior level

Employment Type

Full‑time

Job Function

Consulting

Industries

IT Services and IT Consulting and Financial Services

Referrals increase your chances of interviewing at QUANTEAM – Portugal (RAINBOW PARTNERS Group) by 2x

? If you feel this opportunity is for you, send your CV and join our team!