Senior .NET Engineer (C# Full Stack)

Job Title: Senior .NET Engineer (C# Full Stack)

Location: Remote / Brazil

Duration: 3+ Months

Role Overview

As a Senior .NET Engineer, you will analyze complex technical challenges, decompose them into manageable components, and design scalable, maintainable solutions. You will play a key role in building robust backend systems while collaborating closely with cross-functional teams to deliver high-quality, customer-centric features.

Key Responsibilities

• Analyze complex business and technical problems, design clean architectures, and implement core frameworks.
• Design, develop, and maintain RESTful APIs and backend services using C#, .NET Core, Web API, and Entity Framework.
• Apply software architecture principles such as Domain-Driven Design (DDD) and CQRS to create modular and scalable applications.
• Design and manage SQL Server databases, including writing optimized queries, stored procedures, indexing, and performance tuning.
• Use Entity Framework (EF Core or EF6) for efficient ORM-based data access.
• Write clean, well-documented, testable, and maintainable code following best practices.
• Take end-to-end ownership of code quality by performing unit, integration, and performance testing in a Shift-Left / No-QA environment.
• Collaborate with product managers and cross-functional teams to gather requirements and deliver business-focused solutions.
• Leverage AI-powered development tools (mandatory), such as GitHub Copilot, Claude, or similar, to improve productivity, code quality, and documentation.

Required Experience & Skills

• 5+ years of experience in enterprise or SaaS application development.
• Strong hands-on expertise in:
  • C#, .NET Core, and Web API
  • Angular or other modern frontend frameworks
  • Entity Framework (EF Core or EF6)
  • SQL Server, including query writing, stored procedures, indexing, and performance optimization