Senior Java Full-Stack Engineer | React & AI for Enterprise

Quantum Technologies. LLC; Mountain View (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Quantum Technologies. LLC in Mountain View, CA is seeking a Senior Java Full Stack Engineer with deep frontend expertise in React and TypeScript to build enterprise-grade product experiences with agentic AI capabilities.

This hands-on role requires strong UI/product development, backend integration, and experience delivering end-to-end features from scratch. Ideal candidates have 7+ years of experience and a proven track record shipping production applications with AI agents.

Qualifications

• 7+ years of professional software engineering experience.
• Deep production experience with React and TypeScript.
• Strong frontend architecture, UI engineering, API integration, and testing.
• Full-stack capability including backend work and production shipping.
• Experience with AI agents and agentic development.

Responsibilities

• Design and build enterprise applications and product features from scratch.
• Own full-stack feature delivery from UI architecture through backend/API integration, testing, deployment, and production support.
• Build sophisticated enterprise user experiences using React and TypeScript.
• Design reusable UI components, application state patterns, workflows, and interactive experiences around AI/agent capabilities.
• Build interfaces for multi-step agent workflows, agent actions, approvals, results, status, errors, and human-in-the-loop interactions.
• Integrate frontend applications with backend services, APIs, agent orchestration layers, and enterprise systems.
• Contribute to backend development as required for end-to-end feature ownership.
• Build and integrate agentic capabilities involving tool calling, multi-step workflows, context/state, retrieval, and enterprise actions.
• Ensure agent experiences expose appropriate user controls, validation, failure states, and escalation mechanisms.

Skills

React

TypeScript

Full-stack engineering

UI engineering

API integration

AI agent experience

Testing

Education

Bachelor's degree in CS or related field

Tools

Java

Node.js

Kotlin

OpenAI SDK

Anthropic tooling

Job description

Quantum Technologies. LLC in Mountain View, CA is seeking a Senior Java Full Stack Engineer with deep frontend expertise in React and TypeScript to build enterprise-grade product experiences with agentic AI capabilities.

This hands-on role requires strong UI/product development, backend integration, and experience delivering end-to-end features from scratch. Ideal candidates have 7+ years of experience and a proven track record shipping production applications with AI agents.