Full Stack Engineer

About Ubiminds Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development footprint. Ubi custom-curates Brazil’s top 5% talent to support LATAM strategies through a unique combination of staff augmentation and employer-of-record services. We are assisting a U.S.-based company in expanding its engineering team with a highly skilled Full-Stack Engineer passionate about building scalable, performant, and maintainable systems using clean architecture and cloud-native practices. 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. Cloud & AWS Deploy and manage applications using AWS EC2, S3, Lambda , and related services. Implement event-driven architectures with SNS/SQS . Configure API Gateway , IAM , and monitoring via CloudWatch . Ensure scalability, security, and cloud best practices. What You Should Bring - 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) Angular  or other frontend frameworks. SQL Server  â€“ writing queries, stored procedures, indexing, and performance tuning - Solid understanding of  object-oriented programming ,  design patterns , and  enterprise architecture . - Experience with  DDD ,  CQRS , and clean layering of business logic and data access. - Experience with AWS - Familiarity with  multi-threading ,  asynchronous programming , and system performance tuning. - Experience with modern DevOps tooling, CI/CD pipelines, and Docker. - Strong debugging and troubleshooting skills. - Excellent communication skills (written and verbal) in English. - Experience working across multiple teams or squads. - Exposure to  event-driven architecture  or messaging patterns. - Knowledge of Microservices Architecture. - Required: Active daily use of AI development tools  like  GitHub Copilot ,  Claude , or similar in your workflow. Perks @Ubiminds Work with U.S.-based product teams . Remote-first culture + MacBook provided. English lessons, tech talks, referral bonus, and learning initiatives. Full back-office support: HR, career guidance, and admin services. 👉 Apply now and join an international team building cloud-native, scalable solutions with modern engineering practices. \n \n Please mention the word **ATTENTIVE** and tag RMTA0LjU2LjE1Ni4xOTM= when applying to show you read the job post completely (#RMTA0LjU2LjE1Ni4xOTM=). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.