Senior Fullstack Engineer Agentic Infrastructure Job ID 2025-9881

Internet Brands•El Segundo, CA

14d

About The Position

Senior Fullstack Engineer: Agentic Infrastructure Team Internet Brands is looking for a Senior Fullstack Engineer to join our Agentic AI team. You'll help build our AI capabilities from the ground up, designing and shipping tools, services, and intelligent agents that power AI experiences across our entire product ecosystem.

Requirements

5+ years shipping production code (frontend and backend)
Strong programming fundamentals: We’ll primarily use JavaScript, Python and PHP, but value problem-solving skills over specific language expertise
Backend development experience: Building workflows, APIs, state management, and async systems
Database knowledge: Working with both SQL and NoSQL databases
Frontend skills: Building responsive interfaces with modern frameworks (React, Vue, Angular, Svelte, etc.)
Experience applying AI/ML in production: You've worked with LLMs or ML models in real applications, not just tutorials
Ownership mindset: You identify problems, take initiative, and see things through
Pragmatic and adaptable: You choose the right tool for the job and aren't afraid to learn new technologies
Systematic problem-solver: You can debug complex systems and think through tradeoffs

Nice To Haves

Knowledge of AI evaluation, error analysis, and building feedback loops
Experience with agentic frameworks (LangGraph, Google ADK) or Model Context Protocol (MCP)
Background in information retrieval or search systems

Responsibilities

Build and ship full-stack AI applications: Create frontend experiences and backend systems that power real AI capabilities, iterating based on performance and user feedback
Own the full lifecycle: Take projects from idea through production deployment, ensuring quality, reliability, and scalability
Build foundational infrastructure: Develop search/retrieval services, tool execution layers (MCP servers), workflows, and intelligent agents
Establish measurement systems: Create feedback loops and performance tracking to continuously improve AI system behavior
Solve complex problems: Debug issues across the stack, identify root causes, and implement robust solutions

Benefits

health insurance options such as medical, dental, and vision coverage
flexible spending accounts (FSA) for medical and dependent care
short-term and long-term disability insurance
life and AD&D insurance
401(k) retirement savings plan with a company match
paid time off (PTO)
paid holidays
commuter benefits
access to our Employee Assistance Program (EAP) and well-being coaching services
voluntary benefits such as home, auto and pet insurance, and discounted legal and financial services