At Mercado Libre, we are democratizing commerce and financial services to transform the lives of people across Latin America. Join us in this mission! Imagine working on challenging, dynamic, and innovative projects **and being responsible for:** * Developing and evolving key functionalities of Reservations MP within the Digital Accounts ecosystem, focusing on impact and performance. * Participating in the design of scalable technical solutions that prioritize accessibility, user experience, and efficiency. * Collaborating with UX, Product, and other technical teams to define and implement end-to-end features. * Ensuring product operation and health (monitoring, alerts, war rooms) and contributing to its technical evolution. * Applying artificial intelligence tools (such as AI-assisted editors like Cursor or automated analysis) to boost productivity, quality, and continuous learning. * Maintaining a continuous improvement mindset: contributing ideas, participating in retrospectives, training, and proposing new practices. **Requirements:** * Solid experience with React and modern web application development. * Knowledge of Express.js, Fastify (desirable), and programming with JavaScript (mandatory) and TypeScript (desirable). * Familiarity with component-driven design and good accessibility practices. * Basic or intermediate knowledge of Golang (will be valued). * Experience with monitoring tools such as Datadog or NewRelic. Technology is the essence of our product. Our development, architecture, database, user experience, cybersecurity, and data & analytics teams co-create and are responsible for the leading e-commerce platform in Latin America and one of the most visited sites worldwide. In an industry that reinvents itself every day, our teams are recognized for their vision and leadership. From mobile applications to machine learning, our innovation has a clear focus: simplifying life for those who use our products. **We offer you** * Being part of an entrepreneurial company where thinking big and long-term is in our DNA. * Taking ownership of your development in an environment full of opportunities, learning, growth, expansion, and challenging projects. * Sharing and learning together with outstanding professionals and specialists. * An excellent work environment, with everything needed for you to have a great experience. :)