Senior Front End Developer

Description

Job Summary: We are seeking a Senior Front End Developer to design, implement, and maintain high-quality software solutions, collaborating in a continuous learning environment to transform the financial system. Key Highlights: 1. Digital platform used by over 1 million people 2. Team of top professionals with user at the center 3. Culture of innovation, collaboration, and financial education **At Cocos, we believe investing is simple and for everyone!** That’s why we’ve built a 100% digital, simple, and secure platform already used by over 1 million people. Our mission is to transform the financial system and democratize access to the capital markets through innovative and personalized solutions—integrating all financial products into a single app. We have an outstanding team composed of the best professionals across every area, always placing the user at the center of everything we do. We have an opportunity for you: we are currently looking for a **Senior** **Front End Developer** for our **IT** team. You will be a key player on our team; the role’s objective is to contribute to the development team’s success by designing, implementing, and maintaining high-quality software solutions that meet performance and scalability standards within a continuous learning and collaborative team environment. You will work closely with a large IT team, contributing to strengthening security across all aspects of our application development. This is a **hybrid** position; our offices are located in Florida, Vicente López. **What will you do daily?** * Design, develop, and maintain high-quality software solutions. * Collaborate closely with the team to implement and maintain our applications. * Optimize applications to ensure optimal performance and scalability. * Proactively identify and resolve technical issues, delivering effective and timely solutions. * Provide technical guidance within your area of expertise, fostering knowledge sharing and continuous team development. * Maintain constant and fluent communication with the design team for solution implementation. **What do we expect from you?** * Minimum 5 years of experience working with React.js. * Solid knowledge of TypeScript. * Proficiency in React Native (core features, lifecycle, performance). * Knowledge of HTML and CSS. * Experience managing local and global state (e.g., Zustand, Redux, Jotai, etc.). **What would be a plus?** * Experience with **Expo** (EAS / custom dev clients). * Knowledge of React\-Query. * Prior participation in a migration from React to React Native is a plus. * Knowledge of Node.js. * Experience implementing Unit Testing (Jest, Mocha, etc.). * Familiarity with CI/CD processes (GitHub Actions, EAS, etc.). * Experience with advanced authentication (OAuth, biometrics, WebAuthn). **What’s it like to work at Cocos?** * We are a fintech that doesn’t believe in limits—we set challenging goals and constantly strive to surpass them. * We learn on the move: we’re curious, agile, and love experimenting and improving. * We value every voice and idea, believing there’s always something new to learn. * We have a talented, friendly, and motivated team eager to build transformative solutions. * We foster a culture where financial education, innovation, and collaboration sit at the heart of everything we do. * And we aim not only to grow as a company but also to help every team member grow.