Senior React Native Engineer, Mexico City

About Lab49 Lab49 is an NYC-based award‑winning specialist consultancy that creates bespoke technology in partnership with the world's leading financial institutions. Founded in 2002 to bring Silicon Valley engineering practices to Wall Street, we've delivered hundreds of high‑impact projects across global investment banks and buy‑side firms, spanning distributed systems, high‑performance automation, enterprise UX, cloud, and data‑driven platforms. At Lab49, engineers work directly with clients to design and deliver production systems. We combine technology, design, and business to solve real problems where quality, performance, and clarity matter. We are currently seeking a Senior React Native Engineer to design and build a new, greenfield mobile application for buy‑side investment management research workflows. The mobile app will integrate into an existing web‑based platform and will be built for iOS and Android from day one. The Role As a Senior React Native Engineer, you are an experienced, autonomous contributor who takes ownership of significant parts of a system and helps elevate the engineers around you. This role sits at the intersection of hands‑on mobile engineering, architecture, and consulting. You will be the first mobile engineer on the initiative, responsible for defining the application foundations, establishing patterns, and making practical tooling decisions that enable long‑term success. You will work directly with clients and collaborate closely with designers and backend engineers to ensure the mobile experience aligns cleanly with an existing platform, including shared design systems, domain models, and authentication. This is a hybrid role, requiring 1 day per week at the office in central CDMX (Insurgentes Sur). What You Will Be Doing