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MERN Stack Developer with AI Integration React, Node & AI at FIZNEX

OpenRemoteWorldwide

About the Role

Join FIZNEX as a MERN Stack Developer with AI skills. Build full-stack apps with React, Node.js, MongoDB & integrate AI APIs like OpenAI & Claude. Create SaaS platforms and AI-powered tools.

We are looking for a skilled MERN Stack Developer with AI integration experience to join the FIZNEX team. In this role, you'll build modern, scalable web applications from front to back and bring them to life with AI features like chatbots, automation, and smart integrations. From clean React interfaces to robust Node.js APIs, you'll own the full development cycle.

You'll work closely with our team to build SaaS platforms, admin panels, dashboards, and AI-powered tools for projects across web and mobile. If you love writing clean code, solving real problems, and working with the latest AI APIs, we'd love to meet you.

What You'll Do

  • Build full-stack web applications using the MERN stack (MongoDB, Express, React, Node.js)

  • Develop responsive, modern user interfaces with React and Next.js

  • Design and build REST APIs and backend services with Node.js and Express

  • Integrate AI features — chatbots, content generation, and automation

  • Work with AI APIs like OpenAI, Claude, and Gemini

  • Build RAG systems and connect AI to custom business data

  • Manage databases (MongoDB, PostgreSQL) and write efficient queries

  • Write clean, maintainable, and well-documented code

Skills & Tools You Should Know

  • React & Next.js — modern frontend development

  • Node.js & Express — backend APIs and services

  • MongoDB — database design and management

  • JavaScript & TypeScript — strong, modern coding skills

  • AI APIs — OpenAI, Claude, Gemini integration

  • RAG (Retrieval-Augmented Generation) and AI chatbot development

  • REST API design and third-party integrations

  • Git, version control, and clean coding practices

  • PostgreSQL and cloud deployment (a strong plus)

What We're Looking For

  • A strong portfolio or GitHub showcasing full-stack and AI projects

  • Solid problem-solving skills and clean coding habits

  • Experience integrating AI into real applications

  • Ability to handle multiple projects and meet deadlines

  • Good communication and a collaborative mindset

  • Passion for learning new tools, frameworks, and AI advancements

Why Join FIZNEX

At FIZNEX, you'll work on diverse and exciting projects from SaaS platforms to AI-powered tools for startups and established brands. You'll grow your skills, build an impressive portfolio, and be part of a team that values clean code and innovation. If you're ready to build the future with AI, this is the place to do it.

How to Apply

To apply for this role, you must share your portfolio, GitHub, or samples of your previous work along with your application. We want to see your best projects full-stack apps, AI integrations, or any work that shows your skills. Applications without work samples will not be considered.

Ready to apply? Click here to apply now and submit your application along with your portfolio or GitHub.

Interested in this role?

Send us your resume and portfolio.

Job Details

Remote
Worldwide
Development
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