Senior .NET Engineer (SaaS)

TL;DR

Senior .NET Engineer (SaaS): Building and delivering scalable enterprise SaaS applications and modular backend systems with an accent on RESTful APIs, microservices, database performance, and architectural design. Focus on applying DDD and CQRS, solving complex concurrency and distributed-systems challenges, and owning quality from implementation through production deployment.

Location: Remote, based in São Paulo, Brazil

Company

A nearshore staff augmentation provider delivering technology solutions for U.S. companies through a distributed Latin American engineering network.

What you will do

• Deconstruct complex business problems into modular, maintainable solutions.
• Build foundational frameworks and apply DDD, CQRS, and enterprise architecture patterns.
• Develop, maintain, and optimize RESTful APIs and microservices using C# and .NET.
• Design and tune SQL Server databases, stored procedures, indexes, and queries.
• Own unit, integration, and performance testing in a Shift Left environment without a dedicated QA team.
• Collaborate with Product Managers and engineering squads to deliver customer-centric features, using AI coding assistants throughout the development workflow.

Requirements

• 5+ years of enterprise or SaaS software development experience with C#, .NET Core, Web API, Entity Framework, and SQL Server.
• Strong knowledge of object-oriented programming, design patterns, enterprise architecture, multithreading, and asynchronous programming.
• Practical experience with DDD, CQRS, and separation of business and data-access layers.
• Daily experience using AI coding assistants such as GitHub Copilot or Claude.
• Familiarity with Angular or another modern frontend framework, Git, CI/CD, and Agile development.
• Excellent written and verbal English communication skills are required.

Nice to have

• Production experience building AI-powered product features such as intelligent search, smart forms, or NLP workflows.
• Experience with full feature ownership from design through production deployment.
• Exposure to event-driven architectures, asynchronous messaging, or distributed systems.

Culture & Benefits

• 100% remote work with autonomy over working hours and location.
• Paid time off and a focus on well-being and work-life balance.
• Opportunities to work on high-impact projects for leading U.S. companies.
• Collaboration with a multicultural network of 600+ professionals across 25+ countries.
• Work alongside experienced senior technology professionals.