OurOffice, a U.S.-based SaaS startup, is seeking a senior Full Stack MERN Developer to own production systems and collaborate with the CTO. You will design secure multi-tenant APIs, scale the MERN app, and build data-export features for Power BI and external platforms. The role spans frontend, backend, databases, and AWS, requiring excellent English, self-direction, and willingness to work on U.S. West Coast hours from Latin America.