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, 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 Argentina or Brazil
- 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
Average salary estimate
If an employer mentions a salary or salary range on their job, we display it as an "Employer Estimate". If a job has no salary data, Rise displays an estimate if available.
Mid-level Cloud Engineer to support cloud migrations, automation, and operations for DoD customers as part of Credence's Cloud Managed Services team in McLean, VA.
Whatnot is hiring an experienced Fullstack Engineer on Seller Merchandising to design and build high-performance listing, checkout, and seller tools using modern web technologies.
Experienced Senior Software Engineer needed to lead design and delivery of map services for autonomous driving at Woven by Toyota’s Palo Alto office.
Senior-level Cloud Software Engineer needed to architect and build complex Big Data cloud and distributed information-retrieval systems for classified programs.
A hands-on Full Stack Product Developer role focused on end-to-end feature delivery, UI/UX improvements, and AI/LLM integrations in a fast-moving, remote-friendly US-based team.
NVIDIA seeks a Principal Systems Software Engineer to lead development of CUDA/C++ libraries that accelerate Apache Spark I/O and DataFrame processing for multi-node GPU deployments.
Experienced backend engineer needed to build and maintain scalable, secure cloud services and APIs that power Mitek’s identity and fraud-prevention products.
Senior Backend Engineer needed to build scalable, Kotlin-based financial tools and shape backend architecture at a rapidly growing B2B SaaS startup in New York.
Lead architecture and full-stack development at Seeq, building scalable JVM-backed services and large React single-page applications in a fully remote, product-focused engineering team.
Lead engineering and modernization of a high-performance C++ catastrophe risk modeling platform, driving reliability, performance, and a move to a cloud-native architecture while mentoring a small team.
Palo Alto Networks is hiring a Principal Machine Learning Platform Engineer to architect and scale a high-performance ML inference platform for the Prisma AIRS AI security product.
Bring Netic’s AI agents to life by owning end-to-end customer deployments that turn messy real-world operations into automated workflows delivering measurable revenue.
Replit is hiring a Staff Site Reliability Engineer to lead observability, incident response, and infrastructure automation for its large-scale, Kubernetes-based platform.
🔮
Hi, I'm Risa! Your AI Career Copilot
you, just ask me below!
