Full Stack Software Engineer (React, TypeScript & Node.js)

Software Engineer – Full Stack About the Role We are looking for a Software Engineer to join a product-focused engineering team responsible for building and maintaining web, mobile, and internal platforms. In this role, you will develop and maintain full-stack features across web applications and APIs, working within a small product team. You will have ownership of features throughout the entire development lifecycle, from initial design and implementation to production deployment. The ideal candidate has strong experience with React, TypeScript, and Node.js, along with a solid understanding of backend development, databases, testing, and modern deployment practices. Key Responsibilities Build and maintain frontend applications using React and TypeScript. Develop, maintain, and support REST and GraphQL APIs using Node.js. Design database schemas and write efficient queries using PostgreSQL. Implement caching solutions using Redis. Write and maintain unit, integration, and end-to-end tests using tools such as Jest, Vitest, and Playwright. Containerize applications and services using Docker. Deploy and manage services on AWS EKS using Helm and GitHub Actions. Monitor application performance and troubleshoot production issues using Datadog. Integrate applications with third-party platforms and external APIs. Participate in code reviews, sprint planning, technical discussions, and production support activities. Required Qualifications 3+ years of professional experience in software development. Strong proficiency in JavaScript and TypeScript. Hands-on experience building and maintaining production applications using React. Experience developing and maintaining REST or GraphQL APIs with Node.js. Working knowledge of relational databases and SQL. Familiarity with Docker and CI/CD pipelines. Experience with Git, version control, and pull request workflows. Strong understanding of software development best practices. Clear written and verbal communication skills. Ability to collaborate within a small engineering team and take ownership of features from development through production. Nice-to-Have Qualifications Exposure to Kubernetes, Helm, or AWS services, particularly EKS, RDS, ElastiCache, and ECR. Experience with an ORM such as TypeORM. Familiarity with Tailwind CSS and component libraries such as Radix UI or shadcn/ui. Experience with React Query or similar data-fetching libraries. Previous experience working with high-traffic or transactional systems, such as ticketing platforms, e-commerce applications, or payment systems. Who is Insi? We are a consulting firm specialized in digital evolution. But above all, we are a company of people. People who listen before proposing. Who focus on what truly matters before presenting solutions. Who measure success by what has genuinely changed, not simply by what has been implemented. With more than three decades of history and a global presence, we believe that true transformation begins within: within people, teams, and organizations — and it is this conviction that guides every decision we make, every project we deliver, and every person we develop. Why build your career at Insi? Because here, you think, decide, and create together. We offer autonomy, clear goals, and an environment where Insiders have the opportunity to engage with different technologies, take part in challenging projects, bring new ideas, and work from anywhere in Brazil — and (why not?) the world. We are recognized as one of the best companies to work for in Brazil by Great Place to Work and are among the top 10 employers in Brazil according to TIME magazine. What are our values? We are people serving people We think and act like owners We have a strong drive for performance We grow and learn together We pursue excellence with simplicity We act with creativity and innovation Everyone is welcome regardless of their condition, disability, ethnicity, religious belief, sexual orientation, appearance, age, or any other characteristic. We want you to grow with us in a welcoming environment full of opportunities. If this resonates with you, then #ComeBeAnInsi!