Fullstack Engineer

Artifintech; Sunnyvale (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

ARTIFICIAL INTELLIGENCE TECHNOLOGIES LLC in Sunnyvale, CA seeks a highly skilled Full-Stack Engineer to build production-grade web applications and AI-powered agents. You will design and implement robust React frontends with Python backends, integrating LangChain and LangGraph to drive intelligent workflows.

The role requires hands-on experience with LLM integration, REST APIs, and scalable architectures. You will contribute to secure, maintainable code and collaborate across teams in a

Qualifications

• Experience building full‑stack web applications with React frontend and Python backend
• Experience with AI agents and integrating LLMs
• Familiarity with REST APIs, testing, and CI/CD pipelines

Responsibilities

• Design, build, and maintain full‑stack web applications using React and Python
• Create scalable, secure APIs and backend services
• Implement AI agents and intelligent workflows with LangChain and LangGraph
• Integrate LLMs into applications with tool-calling, memory and multi-step reasoning
• Design RAG-based solutions using embeddings and vector databases
• Orchestrate agent state, control flow, and execution with LangGraph
• Ensure code quality through testing, code reviews, and best practices

Skills

React

Python

Full-stack architecture

REST APIs

Git

LLM integration

Tools

LangChain

LangGraph

FastAPI

Job description

We are looking for a highly skilledFull-Stack Engineerwho can build and maintainproduction-grade web applicationswhile also designing and implementingAI-powered agentsusingLangChain and LangGraph.

Responsibilities

• Design, develop, and maintainfull-stack web applicationsusingReact (frontend)andPython (backend)
• Build scalable, secure, and production-readyAPIs and backend services
• ImplementAI agents and intelligent workflowsusingLangChain and LangGraph
• IntegrateLLMsinto applications, including tool-calling, memory, and multi-step reasoning
• Design and implementRAG-based solutionsusing embeddings and vector databases
• Orchestrate agent state, control flow, and execution using LangGraph
• Ensure code quality throughtesting, code reviews, and best engineering practices
  

Required Skills

• Strong experience inReact(modern hooks, component design, state management) andPython(FastAPI / Flask / Django)
• Solid understanding offull-stack architecture, REST APIs, and backend development
• Hands-on experience withLangChainfor LLM application development
• Hands-on experience withLangGraphfor building and orchestrating AI agents
• Knowledge ofRAG architectures, embeddings, and vector databases
• Proficiency withGit, version control, and collaborative development workflows

ARTIFICIAL INTELLIGENCE TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. ARTIFICIAL INTELLIGENCE TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will ARTIFICIAL INTELLIGENCE TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract