Senior Full Stack Developer, Node + React

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 ...