Senior Full-Stack Engineer - AI Agent Interfaces (React/TS)

Dover; Mountain View (CA); Hybrid; USD 140,000 - 180,000; Full time

Job summary

Cogniify is hiring a Senior Full Stack Engineer with deep expertise in React and TypeScript to build enterprise product experiences that incorporate agentic AI. This is a hands-on, frontend-dominant role that also requires backend integration skills and the ability to build applications from scratch.

You will turn AI agent capabilities into polished, reliable interfaces for users. You should be comfortable working across the UI and the services behind it, including agents, tools, APIs,

Qualifications

• 6-9 years of professional software engineering experience preferred.
• Deep production experience with React and TypeScript.
• Genuine full-stack engineering capability, including backend integration and development.
• Experience building enterprise applications or substantial product features from scratch.
• A track record of shipping user-facing applications into production.

Responsibilities

• Design and build enterprise applications and product features from scratch.
• Own full-stack features from UI architecture through backend and API integration, testing, deployment, and production support.
• Build 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, including agent actions, approvals, results, status, errors, and human-in-the-loop interactions.
• Connect frontend applications with backend services, APIs, agent orchestration layers, and enterprise systems.
• Contribute to backend development when needed to deliver features end to end.
• Build and integrate agentic capabilities such as tool calling, multi-step workflows, context and state handling, retrieval, and enterprise actions.
• Provide users with appropriate controls, validation, failure states, and escalation paths in agent experiences.
• Use Codex, Claude, Claude Code, or similar AI development tools for coding, debugging, testing, and prototyping.

Skills

React

TypeScript

Full-stack engineering

API integration

Frontend architecture

Tools

LangGraph

OpenAI Agents SDK

Anthropic tooling

Codex

Claude

Job description

Cogniify is hiring a Senior Full Stack Engineer with deep expertise in React and TypeScript to build enterprise product experiences that incorporate agentic AI. This is a hands-on, frontend-dominant role that also requires backend integration skills and the ability to build applications from scratch.

You will turn AI agent capabilities into polished, reliable interfaces for users. You should be comfortable working across the UI and the services behind it, including agents, tools, APIs,