Senior Backend Developer – .Net

Senior Backend Developer – .NETInfo on the Senior Backend Developer – .NET role.Want to get to the next step in your international career?We can support youUbiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development footprint.Ubi custom-curates the top 5% of Brazilian tech talent for their LATAM strategy, offering a unique combo of staff augmentation and employer-of-record services.Ubiminds is supporting a US-based product organization modernizing aManagement platform, focused on building shared core services to accelerate scalability, security, and consistency across the product suite.ChallengeWe're looking for aSenior Backend Developer – .NETto help design, build, and integratecore platform servicesthat will power the next generation of an HCM product portfolio.This role sits at the heart of platform modernization, working on foundational systems such asshared data models, unified authentication, and common administration tooling, while supporting product teams as they migrate to the new architecture.ResponsibilitiesBreak down large or complex problems into smaller parts, design clean solutions, and implement the core framework.Build and maintain RESTful APIs and backend services usingC#,.NET Core,Entity Framework, andWeb API.Apply software architecture patterns likeDomain-Driven Design (DDD)andCQRSto build modular and scalable systems.Work directly withSQL Server—designing databases, writing stored procedures, optimizing queries, and tuning performance.UseEntity 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 aShift Left / NoQAteam setup.Collaborate with product managers and other teams to understand requirements and deliver customer-focused features.Use AI development tools (required) — includingGitHub Copilot,Claude, or similar—to assist with code generation, refactoring, documentation, and development speed.Mandatory Skills5+ years of experience in enterprise or SaaS software development.Strong hands-on experience withC#,.NET Core,Web API.Entity Framework (EF Core or EF6).SQL Server—writing queries, stored procedures, indexing, and performance tuning.Solid understanding of object-oriented programming, design patterns, and enterprise architecture.Experience withDDD,CQRS, and clean layering of business logic and data access.Familiarity with multi-threading, asynchronous programming, and system performance tuning.Comfortable with Git and working in a modern development environment (CI/CD, Agile).Strong debugging and troubleshooting skills.Excellent communication skills (written and verbal) in English.Experience working across multiple teams or squads.Active daily use of AI development tools likeGitHub Copilot,Claude, or similar in your workflow.Nice to HaveReal-world experience building AI-powered features (e.g., smart forms, intelligent search, NLP features).Experience working in aShift Leftenvironment with full feature ownership—design to production.Exposure to event-driven architecture or messaging patterns.About UbimindsOur CulturePeople First.We are all about peopleChallenge yourself.There's always room for improvement and continuous improvement is in our essence.Make it happen.Be ready to take challenges as they come.It's all about attitude and commitment.We're in this together.We work as a team, thrive as a team, and evolve as a team.Averaging on awesome.We work hard to deliver high-quality services and look forward to exceeding expectations.Keep it real.We promise you honesty, transparency, and openness, regardless of the situation.Perks and BenefitsYou 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.Have access to growth opportunities with other amazing technology professionals, through tech talks, chapter meetings, and even remote happy hours for tons of funImprove your English through free lessons with a native English speaker.Candidate Referral bonus.Miss working in the office?Our cool Florianópolis headquarters is available, whenever you want, with weekly quick massages & tasty snacks, soft drinks, and games.How Our Process WorksInterview with Tech Recruiter (chat about the job opening and your experiences).Technical Assessment.Client Interview.Offer (yay).#J-*****-Ljbffr