Senior Full Stack Developer, Node + React

Workana; Ciudad de México; A distancia; MXN 1,468,000 - 2,203,000; Jornada completa

Descripción de la vacante

A U.S.-based SaaS startup seeks a Senior Full Stack MERN Developer to enhance their existing MVP and scale it into a production-grade platform. Key responsibilities include refactoring code, optimizing MongoDB schemas, and integrating AI services. This role is remote with a focus on candidates in Argentina or Brazil and requires availability during U.S. West Coast hours.

Servicios

Direct collaboration with a technical founder

Long-term role solving real production challenges

Opportunities for growth into a lead role

Formación

• Expert in the MERN stack with strong coding practices.
• Deep understanding of MongoDB performance and optimization.
• Strong backend skills with Node.js and AWS integration.

Responsabilidades

• Take ownership of an existing MERN MVP and evolve it.
• Refactor and improve code for maintainability and performance.
• Debug complex cross-layer issues quickly.
• Design and optimize MongoDB schemas and triggers.
• Integrate AI services into production apps.

Conocimientos

MERN stack (MongoDB, Express.js, React.js, Node.js)

Deep MongoDB knowledge

Node.js backend and infrastructure skills

AI services integration

Excellent English communication

Herramientas

AWS (EC2, S3, Lambda)

CI / CD pipelines

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.

We are prioritizing candidates based in Argentina or Brazil to align with U.S. West Coast (Los Angeles) working hours.

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