Senior Full Stack Developer, Node + React

hace 7 días

Ciudad de México Workana A tiempo completo

We 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.
**What You’ll Do**:

- Take ownership of an existing MERN MVP and evolve it into a scalable, production-ready product
- Refactor and improve messy or inefficient code for clarity, maintainability, and performance
- Debug and resolve complex cross-layer issues quickly (MongoDB, Node.js, React, CI/CD)
- Design and optimize MongoDB schemas, indexes, Atlas Search, and triggers
- Build event-driven workflows with MongoDB triggers)
- Integrate AI/LLM services (OpenAI, AWS Comprehend, embeddings, NLP features) into production apps
- Support and improve Twilio-based messaging and webhook integrations
- Contribute to new product features end-to-end (backend + frontend)

**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 (mandatory)
- Availability during U.S. West Coast working hours (PST/PDT)
- Based in Argentina or Brazil

**Benefits**:

- Direct collaboration with a technical founder/CTO
- Long-term role solving real production challenges (not just CRUD apps)
- Remote role with U.S. time zone collaboration
- Opportunity to grow into a lead role as the team expands

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