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 company that is transforming the way organizations discover, engage, and hire the best talent. Connecting companies and candidates anytime, anywhere, end-to-end hiring platform features video interviewing, assessments, and conversational AI. As an industry leader in science-backed, modern hiring solutions powered by ethical AI, they have hosted more than 70 million video interviews and 200 million chat-based candidate engagements for over 1,200 pioneering customers around the globe. Apply now! This is a unique opportunity for you to not only accelerate your international career but also work in a groundbreaking company. Challenge We are seeking a Senior Full Stack Software Engineer to join our platform team. You will help maintain and enhance a critical codebase, focusing primarily on backend systems built with .NET and frontend components using React and TypeScript. This role involves close collaboration with other engineers and cross-functional teams to resolve issues, improve reliability, and deliver incremental improvements, with opportunities to expand into more feature-driven work over time. What you'll do - Design, implement, and maintain robust .NET Core services and APIs within a microservices architecture. - Build responsive and accessible front-end experiences using React and TypeScript. - Write clean, testable, and scalable code, following modern engineering best practices. - Support automated test coverage for high-quality releases. - Participate in design reviews, code reviews, and technical planning. - Help identify and reduce technical debt across the platform. In order to succeed in this position, you will need: Mandatory skills - 7+ years of professional experience with .NET Core / C# for web applications. - Solid experience with REST APIs and microservices design. - Experience with cloud platforms and tooling (e.g., Azure, AWS, or GCP). - Strong proficiency with JavaScript, HTML, CSS, and frameworks like React. - Experience with relational databases and ORMs such as Entity Framework Core. - Familiarity with Git workflows and source control best practices. - Basic reading and writing skills in English (used for reading documentation, variable naming, and code comments). - Ability to collaborate in distributed, remote teams. Nice to Have - Experience working on high-scale enterprise platforms. - Familiarity with automated testing tools: xUnit, NUnit for .NET; Jest, Cypress for front- end. - Experience with Docker, Kubernetes, or other container orchestration tools. - Experience with observability tools such as OpenTelemetry, Datadog, etc. - Exposure to legacy-to-modern migration projects. - Knowledge of secure coding practices. Perks and Benefits **As a Senior Full Stack Software Engineer @Ubiminds, 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 How our process works • Interview with Tech Recruiter (specific chat about the job opening) • Client process (including technical challenges and on-demand assessments) • Offer