Full Stack Engineer (React / TypeScript / Nest.js)

Remote position, only for professionals based in Argentina or Uruguay We're looking for a full stack engineer with a strong frontend focus to join our lean, high-impact engineering team for a 3–6 month engagement. You’ll play a key role in building and iterating on user-facing experiences that power our energy marketplace, while also contributing to backend services when needed. This is a high-ownership role where you'll work in a fast-paced startup environment, shipping production-ready features quickly and collaborating closely with a small, highly technical team. We’re looking for someone comfortable wearing multiple hats and leveraging AI-augmented development practices to move fast and deliver impact. What You'll Do - Build and enhance modern, responsive frontend applications using React and TypeScript - Collaborate on backend services using Node.js / Nest.js to support new and existing features - Work across the stack to deliver end-to-end product functionality in a fast-moving environment - Partner with product and cross-functional teams to translate requirements into scalable and intuitive user experiences - Contribute to modernizing and improving the frontend architecture - Integrate with APIs, third-party services, and marketplace systems - Ship features quickly in a team with frequent production deployments - Take ownership of features and projects, from design to deployment - Collaborate closely with a small team where your technical decisions have immediate impact - Leverage AI tools and workflows to accelerate development and improve productivity What You Bring - 5+ years of experience in full stack or frontend-heavy engineering roles - Strong expertise in React and TypeScript - Experience working with Node.js backend services, ideally with Nest.js - Proven experience working in startup or small team environments with high ownership - Solid understanding of REST APIs, async data flows, and modern web architecture - Ability to move quickly while maintaining code quality and scalability - Comfortable working across the stack when needed - Experience using AI coding tools and interest in AI-augmented development workflows - Strong product mindset and ability to operate in ambiguous, fast-paced environments Nice to Have - Experience with marketplace platforms or data-driven products - Familiarity with cloud environments (GCP preferred) - Experience with real-time data or event-driven architectures - Interest in energy, climate tech, or pricing systems