Senior Full Stack Software Engineer - .NET / Angular (424)

Challenge

Responsibilities:

• 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 structure modular, maintainable systems.
• Work hands-on with SQL Server: database design, stored procedures, indexing, query optimization, and performance tuning.
• Use Entity Framework (EF Core or EF6) for ORM and efficient data access.
• Write clean, testable, maintainable code—with proper documentation.
• Take full ownership of testing (unit, integration, performance) as part of a Shift Left / No QA engineering culture.
• Participate in architectural decisions, code reviews, and continuous improvement initiatives.

Mandatory Skills:

• 5+ years of experience in enterprise or SaaS software development.
• Strong hands-on experience with: C#, .NET Core, Web API, Entity Framework (EF Core or EF6)
• SQL Server (queries, stored procedures, indexing, tuning)
• Solid understanding of OOP, software design patterns, and enterprise architecture.
• Experience with DDD, CQRS, and clean separation of business logic/data layers.
• Knowledge of multithreading, async/await, and system performance tuning.
• Strong Git skills and familiarity with CI/CD pipelines and Agile environments.
• Excellent debugging and troubleshooting skills.
• Strong communication skills in English (written and verbal).
• Experience collaborating with multiple squads/teams.
• Required: Active daily use of AI coding tools (Copilot, Claude, etc.).

Nice to Have:

• Experience building AI-powered features (smart forms, intelligent search, NLP, etc.).
• Experience in Shift Left / Full Ownership environments—from design to deployment.
• Exposure to event-driven architecture or messaging patterns (Kafka, RabbitMQ, etc.).
• Familiarity with Angular or another modern frontend framework.

Team & Environment:

• Collaborative environment working closely with PMs, QA, and designers.
• Engineers are fully responsible for testing and code quality (shift-left development culture).
• Balanced workload of new feature development and ongoing system maintenance.
• Encourages ownership, accountability, and continuous improvement.

Perks and Benefits

• You are placed in a product-based company, with the same treatment as their full-time employees.
• Have our full back-office support, from career guidance to HR and concierge services.
• Enjoy our remote-first policy – we are a distributed team, after all.
• Get your own MacBook (none of that "bring your own device" stuff here).
• Have access to growth opportunities with other amazing technology professionals, through tech talks, chapter meetings, and even remote happy hours for tons of fun!
• Improve your English through free lessons with a native English speaker - get to the next level on your communication skills!
• Candidate Referral bonus (promote Ubi to your tech friends, and get paid for it!)
• Miss working in the office? Our cool Florianópolis headquarters is available, whenever you want, with weekly quick massages & tasty snacks, soft drinks, and games