OverviewWe are a U.S.-based SaaS startup looking for a Senior Full Stack MERN Developer to work directly with our hands-on CTO. This is a senior role for someone who can not only ship features but also improve architecture, enforce clean code practices, and scale an MVP into a production-grade SaaS platform. We are prioritizing candidates based in Latin America (Argentina, Brazil, Colombia, Chile, etc.) to align with U.S. West Coast (Los Angeles) working hours.ResponsibilitiesTake ownership of an existing MERN MVP and evolve it into a scalable, production-ready productRefactor and improve messy or inefficient code for clarity, maintainability, and performanceDebug and resolve complex cross-layer issues quickly (MongoDB, Node.js, React, CI/CD)Design and optimize MongoDB schemas, indexes, Atlas Search, and triggersBuild event-driven workflows with MongoDB triggersIntegrate AI/LLM services (OpenAI, AWS Comprehend, embeddings, NLP features) into production appsSupport and improve Twilio-based messaging and webhook integrationsContribute to new product features end-to-end (backend + frontend)RequirementsExpert in MERN stack: MongoDB, Express.js, React.js, Node.jsDeep MongoDB knowledge (indexes, performance, aggregation, triggers)Strong backend/infra skills: Node.js async/memory, AWS (EC2, S3, Lambda), CI/CD pipelinesExperience integrating AI services into production appsExcellent English communication (mandatory)Availability during U.S. West Coast working hours (PST/PDT)Based in Latin America (Argentina, Brazil, Chile, Colombia, etc.) for better time zone overlapBenefitsDirect collaboration with a technical founder/CTOLong-term role solving real production challenges (not just CRUD apps)Remote role with U.S. time zone collaborationOpportunity to grow into a lead role as the team expands
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