Senior Full Stack Developer, Node + React

Workana; A distancia; MXN 1,253,000 - 1,791,000; Jornada completa

Descripción de la vacante

A U.S.-based SaaS startup is seeking a Senior Full Stack MERN Developer to own and evolve an existing MERN MVP into a scalable product. This role involves refactoring code for performance, designing MongoDB structures, and integrating AI services into production apps. The ideal candidate has deep knowledge of the MERN stack, strong backend skills, and excellent English communication. This remote position requires availability during U.S. West Coast working hours and offers opportunities for growth into leadership roles.

Servicios

Direct collaboration with CTO

Long-term role with production challenges

Opportunity to grow into a lead role

Formación

• Expertise in the MERN stack and cloud services.
• Proficient in creating scalable and maintainable code.
• Strong skills in debugging complex issues in production.

Responsabilidades

• Take ownership of an existing MERN MVP and evolve it into a scalable product.
• Refactor and improve code for clarity and performance.
• Design and optimize MongoDB schemas and triggers.
• Integrate AI services into production apps.
• Support Twilio-based messaging integrations.

Conocimientos

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)

Experience integrating AI services into production apps

Excellent English communication

Descripción del empleo

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