You will work on evolving a SaaS platform used daily by thousands of users in the United States. It is an established product with continuous operations, frequent production releases, and direct business impact. We are seeking a Senior Full Stack Developer with technical maturity to work on real-world systems, make responsible decisions, propose improvements, and contribute to the platform’s quality, performance, scalability, and sustainability. At Tech6, you will have the opportunity to participate in key technical decisions, discuss architecture, propose structural improvements, and collaborate closely with the team—contributing beyond task execution. **Your responsibilities** * Develop and enhance front-end features using React and back-end features using .NET. * Design, build, and evolve REST APIs with focus on security, performance, maintainability, and observability. * Participate in technical decisions regarding architecture, scalability, performance, and platform evolution. * Work with relational databases in high-volume, continuously operating environments requiring optimization. * Investigate production issues, identify root causes, and propose solutions to prevent recurrence. * Participate in code reviews to elevate the technical quality of deliverables. * Contribute to refactors, architectural improvements, and continuous evolution of the codebase. * Evaluate impacts, risks, and trade-offs before implementing new solutions. * Provide technical support to other team members, sharing knowledge and reinforcing sound engineering practices. **Requirements** * Solid experience as a Full Stack Developer in production systems. * Solid experience with React, including component architecture, state management, performance, and front-end best practices. * Advanced experience with C# and .NET. * Strong ability to analyze, model, and optimize relational databases. * Experience with REST APIs, service integration, and application architecture. * Hands-on experience with automated testing and modern development practices. * Familiarity with CI/CD pipelines and continuous deployment environments. * Experience working on production systems, with emphasis on stability, monitoring, and end-user impact. * Ability to make autonomous technical decisions, considering context, risks, and solution sustainability. **Nice-to-have** * Experience with Azure or AWS. * Experience with highly available systems. * Experience with observability: logs, metrics, and tracing. * Prior experience with SaaS products or platforms supporting continuous operations. * Experience with system architecture, application modernization, or legacy system evolution. * Experience providing technical mentorship to other developers on the team. **What we expect from you** * Autonomy to lead complex technical deliveries responsibly. * Strong analytical skills and sound decision-making ability. * Critical thinking to propose practical and feasible technical improvements. * Continuous focus on quality, performance, security, and production impact. * Active collaboration with the team and consistent participation in technical discussions. * Technical leadership posture, helping raise the bar for deliverables and decisions. * Ownership mindset, commitment to the product, and accountability for final outcomes. **Work model** **Contract: PJ or Cooperative.** **Perks** * Health insurance subsidy. * Employee referral program. * Environment with technical autonomy and active participation in product decisions. Work on an established international product, tackling real technical challenges with direct business impact. If you seek genuine technical challenges, active involvement in evolving an established product, and room to contribute beyond implementation, we want to meet you. **Join Tech6!**
João Silva
Indeed · HR
João Silva
Indeed · HR
