Full stack with Agentic AI & React - USA Onsite (Mountain View, CA)

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

The Role

Cogniify is hiring a Senior Full Stack Engineer to build product experiences around AI agents. React and TypeScript are central to this role, but you will also work with APIs and backend services to deliver complete features. We are looking for someone who has built applications from scratch and shipped them to production.

The work includes interfaces where users can follow an agent’s progress, review actions, approve steps, and understand results or errors. You should be able to make these experiences clear and reliable while understanding how the agents, tools, and services behind them work.

What You'll Do

• Build enterprise applications and new product features, with a strong focus on React and TypeScript.
• Own features from frontend design through API and backend integration, testing, deployment, and production support.
• Create reusable components, manage application state, and design workflows that make agent capabilities easy to use.
• Build interfaces for multi-step agent workflows, including actions, approvals, progress, results, errors, and human review.
• Connect the frontend to backend services, agent orchestration layers, APIs, and enterprise systems. Contribute to backend code when needed.
• Integrate agent capabilities involving tool calls, context and state, retrieval, multi-step workflows, and actions in enterprise systems.
• Give users clear controls, validation, and ways to handle failures or elevate an issue.
• Use Codex, Claude, Claude Code, or similar AI development tools for coding, debugging, testing, and prototyping, and review the output carefully.
• Take part in product and architecture discussions, design reviews, and code reviews.

What We're Looking For

• 6-9 years of professional software engineering experience preferred.
• Deep production experience with React and TypeScript, including frontend architecture, state management, API integration, and testing.
• Full-stack experience beyond frontend development, with the ability to work on backend services and integrations.
• Experience building substantial product features from scratch and shipping user-facing applications to production.
• Hands-on familiarity with AI agents and agentic application development.
• Understanding of multi-step workflows, tool or function calling, context and state, retrieval or RAG, and agent integration with APIs.
• Familiarity with an agent framework or SDK such as LangGraph, OpenAI Agents SDK, Anthropic tooling, or a comparable technology.
• Familiarity with Codex, Claude Code, or a similar AI-assisted development workflow.
• Strong testing, debugging, performance, reliability, and production engineering practices.

Preferred Qualifications

• Backend experience with Java, Kotlin, Python, Node.js, or comparable production technologies.
• Experience designing human-in-the-loop interfaces and complex workflows.
• Experience with streaming AI interfaces or long-running workflows.
• Experience with agent evaluation, observability, guardrails, and failure handling.
• Experience building SaaS, financial, or other enterprise applications where reliability and user control matter.

Perks And Benefits Of Working With Us

• Unlimited PTO.
• Please ask us about our very generous parental leave, much above industry standards!.
• Entrepreneurial culture where pushing limits and taking risks is everyday business.
• Open communication with management and company leadership.
• Small, dynamic teams = massive impact.
• Medical, Dental and Vision coverage for employees.
• Access to Disability & Life insurance.
• Mental health and wellbeing support
• Annual bonus program
• Employer Stock Purchase Program (ESPP)
• Yearly Team building experiences
• Mentorship and sponsorship opportunities
• Manager resources and support

We are an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or any other protected characteristic.