Senior Full Stack Developer, Node + React

This U.S.-based SaaS startup is seeking a Senior Full Stack Developer with expertise in MERN technology. The role involves ownership of an existing MVP, refactoring code, debugging issues, and designing scalable production-ready product architectures. Candidates should be based in Argentina or Brazil to align with US-based working hours.

Requirements

• Expert in MERN stack: MongoDB, Express.js, React.js, Node.js
• Deep MongoDB knowledge (indexes, performance, aggregation, triggers)
• Strong backend/infra skills: Node.js async/memory, AWS (EC2, S3, Lambda), CI/CD pipelines
• Experience integrating AI services into production apps
• Excellent English communication
• Availability during U.S. West Coast working hours (PST/PDT)

Benefits

• Direct collaboration with a technical founder/CTO
• Long-term role solving real production challenges
• Remote role with U.S. time zone collaboration
• Opportunity to grow into a lead role