Senior .NET Engineer

We are seeking a hands-on Senior .NET Engineer to design, build, and deliver high-quality, scalable enterprise SaaS applications.

About our client Our client provides comprehensive HR software for the public sector, covering the full employee lifecycle - recruiting, onboarding, performance management, and compliance for government organizations.

What you'll do

• Break down large or complex problems into smaller parts, design clean solutions, and implement the core framework.

• Build and maintain RESTful APIs and backend services using C#, .NET Core, Entity Framework, and Web API.

• Apply software architecture patterns like Domain-Driven Design (DDD) and CQRS to build modular and scalable systems.

• Work directly with SQL Server—designing databases, writing stored procedures, optimizing queries, and tuning performance.

• Use Entity Framework (EF Core or EF6) for ORM and data access.

• Write clean, testable, and maintainable code with proper documentation.

• Take full ownership of testing your own code—unit, integration, and performance testing—as part of a Shift Left / No QA team setup.

• Collaborate with product managers and other teams to understand requirements and deliver customer-focused features.

• Use AI development tools (required)—including GitHub Copilot, Claude, or similar—to assist with code generation, refactoring, documentation, and development speed.

What you bring (must-haves)

• 5+ years of experience in enterprise or SaaS software development.

• Strong hands-on experience with C#, .NET Core, and Web API.

• Deep understanding of Entity Framework (EF Core or EF6).

• Proficiency in SQL Server – writing queries, stored procedures, indexing, and performance tuning.

• Familiarity with Angular or other frontend frameworks.

• Solid understanding of object-oriented programming, design patterns, and enterprise architecture.

• Experience with DDD, CQRS, and clean layering of business logic and data access.

• Familiarity with multi-threading, asynchronous programming, and system performance tuning.

• Comfort working with Git and modern development environments (CI/CD, Agile).

• Strong debugging and troubleshooting skills.

• Excellent communication skills in English (conversational English is mandatory).

• Experience working across multiple teams or squads.

• Active daily use of AI development tools like GitHub Copilot, Claude, or similar in your workflow.

Bonus points for (nice-to-haves)

• Real-world experience building AI-powered features (e.g., smart forms, intelligent search, NLP features).

• Experience working in a Shift Left environment with full feature ownership—design to production.

• Exposure to event-driven architecture or messaging patterns.

Perks & benefits 💻 Equipment provided — none of that "bring your own device" stuff here 🛡️ Full back-office support — Legal, Accounting, HR Business Partner, and Delivery team 🧭 Career and cultural mentoring — how to show up, stand out, and navigate US work culture 🗣️ Free English lessons with a native speaker 🤝 Referral bonus — recommend Ubi to your tech friends and get paid for it 🏖️ Florianópolis HQ always open — 100% remote, but the office is there whenever you want it.

How the process works

1. Interview with our Tech Recruiter (+ quick AI assessment, if needed)

2. Client interview process (varies by company)

3. Offer 🎉

4. Onboarding with full Ubiminds support

Why Ubiminds? With 9 years in the market and GPTW-certified, Ubiminds connects Latin American tech professionals with software companies in the US and Canada. Hundreds of professionals in data, design, product, and engineering are already growing in North American teams with our support. We're with you throughout the entire journey — Recruitment, Legal, Accounting, PeopleOps, and career guidance — so you can thrive internationally with confidence.

Ready to go global? Apply now — it takes less than 5 minutes.