Senior Full Stack Engineer - AI Agent Apps (React + TS)

Dover; Mountain View (CA); Hybrid; USD 180,000 - 240,000; Full time

Benefits offered by this job

Unlimited PTO

Parental leave (generous)

Entrepreneurial culture

Open management communication

Small dynamic teams with impact

Medical, dental, vision coverage

Disability & Life insurance

Mental health support

Annual bonus program

Employee stock purchase program

Team building experiences

Mentorship and sponsorship

Job summary

Cogniify in Mountain View, CA seeks a Senior Full Stack Engineer to build product experiences around AI agents. You will work with React and TypeScript as core tools while programming APIs and backend services to deliver complete features.

Prior experience building production applications from scratch is highly valued. You will craft interfaces to follow agent progress, review actions, and understand results or errors, ensuring clarity and reliability of the experiences behind agents, tools, and

Qualifications

• 6–9 years of professional software engineering experience preferred.
• Deep production experience with React and TypeScript, including frontend architecture and API integration.
• Full‑stack experience with backend services and integrations.
• Experience building substantial product features from scratch and shipping to production.
• Hands‑on familiarity with AI agents and agentic app development.

Responsibilities

• Build enterprise applications and new product features focused on React and TypeScript.
• Own features from frontend design through API and backend integration, testing, deployment, and production support.
• Create reusable components and design workflows for agent capabilities.
• Build interfaces for multi‑step agent workflows including actions, approvals, progress, results, and errors.
• Connect frontend to backend services, agent orchestration layers, and APIs; contribute to backend code when needed.
• Integrate agent capabilities involving tool calls, context/state, and retrieval in enterprise systems.
• Provide clear controls, validation, and robust failure handling.
• Use AI development tools for coding, debugging, testing, and prototyping.

Skills

React

TypeScript

Full‑stack

AI agents

Frontend architecture

Testing

Tools

LangGraph

OpenAI Agents SDK

Anthropic tooling

Codex/Claude Code

Job description

Cogniify in Mountain View, CA seeks a Senior Full Stack Engineer to build product experiences around AI agents. You will work with React and TypeScript as core tools while programming APIs and backend services to deliver complete features.

Prior experience building production applications from scratch is highly valued. You will craft interfaces to follow agent progress, review actions, and understand results or errors, ensuring clarity and reliability of the experiences behind agents, tools, and