Fullstack Engineer

Valiant Technologies LLC; Sunnyvale (CA); Presencial; USD 120.000 - 160.000; Jornada completa

Descripción de la vacante

VALIANT TECHNOLOGIES LLC is seeking a highly skilled Full-Stack Engineer to build and maintain production-grade web applications and to design AI-powered agents using LangChain and LangGraph. The role focuses on delivering scalable, secure APIs and backend services with a strong emphasis on AI integration.

You will work with React on the frontend and Python on the backend, implementing LLM-based tooling, memory, and multi-step reasoning, and crafting RAG-based solutions with embeddings and

Formación

• Experience building production-grade web apps with modern frontend (React) and backend (Python) frameworks.
• Hands-on with LangChain for LLM apps and LangGraph for agent orchestration.
• Strong understanding of REST APIs, security, and scalable backend design.
• Knowledge of embeddings and vector databases for RAG-based solutions.

Responsabilidades

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

Conocimientos

React

Python

LangChain

LangGraph

REST APIs

Full-stack architecture

Embeddings

Vector databases

Git

Herramientas

Git

Descripción del empleo

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

VALIANT 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. VALIANT 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 VALIANT 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