Senior Full Stack Engineer - NET ecosystem (545)

Want to get to the next step in your international career? We can support you!

Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development footprint. Ubi custom-curates Brazilian top 5% talent for their LATAM strategy, offering a unique combo of staff augmentation and employer-of-record services.

Ubiminds is assisting a growing SaaS company that is modernizing its technology platform and investing in scalable, AI-assisted software development practices. As part of this journey, they are expanding their engineering team to build secure, high-performance applications while leveraging modern architecture, cloud technologies, and AI-powered development workflows.

We’re looking for a Senior Full Stack Engineer with strong experience in the .NET ecosystem to help build scalable, secure, and high-performance SaaS applications.

In this role, you'll be responsible for hands-on software development, architecture and design, troubleshooting complex technical challenges, and planning technical solutions. You'll work across both backend and frontend technologies while collaborating closely with cross-functional teams to deliver reliable, high-quality software.

The ideal candidate embraces modern engineering practices, enjoys solving challenging technical problems, and is excited to leverage AI-powered development tools to improve productivity and software quality.

• Design, develop, and maintain scalable, secure, and high-performance SaaS applications.

• Participate in architecture and technical design decisions across the application stack.

• Develop and maintain backend services using the .NET ecosystem.

• Build and maintain modern web applications using Angular.

• Troubleshoot complex application issues and optimize system performance.

• Design and optimize relational databases, SQL queries, and stored procedures.

• Write clean, maintainable, and well-tested code following engineering best practices.

• Contribute to planning, technical discussions, and solution design.

• Work in a Shift Left engineering environment with strong ownership of software quality.

• Leverage AI-powered development tools to accelerate software delivery and improve engineering efficiency.

• 5+ years of professional experience building web applications using C#, SQL, and Angular.

• Experience working with stored procedures, relational databases, and performance-sensitive SQL.

• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field (B.E., B.Tech, MCA, B.Sc), or equivalent practical experience.

• Strong troubleshooting, debugging, and performance optimization skills.

• Experience writing unit and integration tests.

• Comfortable working in a Shift Left development environment.

• Strong commitment to delivering high-quality, reliable software.

• Self-driven, proactive, and collaborative mindset.

• Excellent written and verbal communication skills in English.

• Willingness to embrace AI-powered development tools such as GitHub Copilot, Cursor, Claude Code, or similar.

• Basic to intermediate understanding of modern AI concepts including LLMs, MCP, RAG, or related technologies.

• Experience modernizing ASP.NET Web Forms or similar server-rendered applications.

• Strong knowledge of Microsoft SQL Server, including indexing and query optimization.

• Familiarity with AWS services such as EC2, S3, SES, or similar cloud platforms.

• Exposure to modern API technologies such as GraphQL.

• Experience working with coding agents or AI-assisted development workflows.

• Solid understanding of HTML and CSS in traditional web application environments.

• Collaborative engineering team focused on modernizing enterprise SaaS applications.

• Strong engineering culture centered on quality, ownership, and continuous improvement.

• Opportunity to work with modern AI-assisted software development workflows.

• Collaborative environment with architecture discussions and cross-functional planning.

• Fast-paced product organization focused on scalability, innovation, and engineering excellence.

People First. We are all about people!

Challenge Yourself. Continuous improvement is in our essence.

Make it Happen. We value attitude, ownership, and commitment.

We’re in This Together. We work, grow, and evolve as a team.

Averaging on Awesome. We deliver high-quality services and exceed expectations.

Keep it Real. Honesty, transparency, and openness — always.

As a Senior Full Stack Engineer @Ubiminds, you:

• Are placed in a product-based company, treated like a full-time team member.

• Count on our full back-office support: career guidance, HR, and concierge services.

• Enjoy our remote-first policy.

• Get your own MacBook (no BYOD here!).

• Access tech talks, chapter meetings, and a strong community of top engineers.

• Improve your English through free lessons with a native English speaker.

• Earn a referral bonus when recommending new Ubiminders.

• Want office vibes sometimes? Our Florianópolis HQ is open — snacks, massages, drinks, and games included.