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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 Latin America (Argentina, Brazil, Colombia, Chile, etc.) to align with U.S. West Coast (Los Angeles) working hours.
What You'll Do
We are prioritizing candidates based in Latin America (Argentina, Brazil, Colombia, Chile, etc.) 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)
- 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 Latin America (Argentina, Brazil, Chile, Colombia, etc.) for better time zone overlap
- 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
Key Skills
Ranked by relevance
saas
aws
reactjs
react
cicd
ai
s3
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- Posted
- Sep 30, 2025
- Type
- Contract
- Level
- Entry
- Location
- Argentina
- Company
- Workana
Industries
IT Services
IT Consulting
Categories
Engineering
Related Jobs
3 roles aligned with this opportunity
View Job Details
Related
Développeur Fullstack JS F/H
2026-06-17
Full-time
Not Applicable
France
IT Services
Engineering
View Job Details
Related
Cloud Networking Engineer
2026-06-16
Full-time
Mid-Senior
Argentina
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Engineering
View Job Details
Related
Fullstack Developer
2026-06-17
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Information Technology