Full Stack Engineer

About UbimindsUbiminds 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 & AWSDeploy 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 APIEntity Framework (EF Core or EF6)Angular or other frontend frameworks.SQL Server – 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 @UbimindsWork 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\nPlease mention the word **ATTENTIVE** and tag RMmEwMjo0NzgwOjNmOjE3OTc6MDpiYWI6OTgwNDox when applying to show you read the job post completely (#RMmEwMjo0NzgwOjNmOjE3OTc6MDpiYWI6OTgwNDox). 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.