Senior Mern Stack Engineer (GenAI & LLMOps Platform)

Job description

Experience : 4-5 Years

Job Type : Full-time

About Katonic : We are a young Australian generative AI startup headquartered in Sydney, Australia.

Job Description :

We are seeking a highly skilled Senior MERN Stack Developer with 4-5 years of experience to design and build the core application layers of our enterprise-grade GenAI and LLMOps platform. You will bridge the gap between our responsive frontend and our robust AI backend.

Since our core AI and backend services are already established, your primary focus will be on integration —using Node.js to orchestrate workflows, consume internal Python-based microservices, and deliver seamless, real-time GenAI experiences to the React frontend.

Key Responsibilities :

• Design and develop scalable web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js).
• Integration & Orchestration : Act as the bridge between the UI and the backend / AI team; build the Node.js middleware that consumes existing Python / FastAPI microservices and serves data to the frontend.
• Build intuitive React interfaces for GenAI features, including real-time chat, prompt playgrounds, and dashboards.
• Implement real-time data handling using WebSockets / SSE to stream LLM tokens from the backend to the user.
• Collaborate with Backend and AI Engineers to define and consume API contracts (REST / gRPC) for model serving and RAG pipelines.
• Optimize front-end performance and state management (Redux / Context API) to handle complex JSON outputs from AI models.
• Write clean, maintainable code with unit and integration tests to ensure the "glue" between systems is robust.

Required Skills :

Preferred Skills (Integration Focus) :

What We Offer :

"Please apply only if you match the criteria.”

To apply, please fill out this form here : https : / / shorturl.at / Of9gU

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