Senior Full Stack MERN Developer

Workana
Full-time Belo Horizonte, Minas Gerais TI, tecnologia e SAP
Posted:
March 02, 2026
Location:
Belo Horizonte, Minas Gerais, Brazil

Job Description

Senior Full Stack MERN Developer

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, AW...

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Job Overview

Job Type: Full-time
Location: Belo Horizonte, Brazil
Posted: March 02, 2026
Deadline: April 11, 2026