Jobtailor

Senior Backend Engineer – .NET, Cloud, APIs

📍 Location
sintra, lisboa
⏰ Job Type
Full-time
📅 Posted
July 15, 2026
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Job Description

  • Design, develop, and maintain backend services using C# and .NET Core.
  • Build secure, scalable, and high-performance REST APIs.
  • Implement backend solutions aligned with approved architectural patterns and technical guidelines.
  • Develop services capable of handling high concurrency and production-scale workloads.
  • Write optimized and maintainable database queries while ensuring data integrity and performance.
  • Troubleshoot and resolve backend and production issues efficiently.
  • Write clean, maintainable, testable, and production-ready code.
  • Apply SOLID principles and safeguard architectural practices such as Clean Architecture, Onion Architecture, Hexagonal Architecture, and Domain-Driven Design (DDD).
  • Implement and maintain unit tests, integration tests, end-to-end tests, and performance/load tests.
  • Participate actively in code reviews and engineering quality initiatives.
  • Work clo...

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