Fullstack Engineer

We are looking for a highly skilledFull-Stack Engineerwho can build and maintainproduction-grade web applicationswhile also designing and implementingAI-powered agentsusingLangChain and LangGraph.ResponsibilitiesDesign, develop, and maintainfull-stack web applicationsusingReact (frontend)andPython (backend)Build scalable, secure, and production-readyAPIs and backend servicesImplementAI agents and intelligent workflowsusingLangChain and LangGraphIntegrateLLMsinto applications, including tool-calling, memory, and multi-step reasoningDesign and implementRAG-based solutionsusing embeddings and vector databasesOrchestrate agent state, control flow, and execution using LangGraphEnsure code quality throughtesting, code reviews, and best engineering practicesRequired SkillsStrong experience inReact(modern hooks, component design, state management) andPython(FastAPI / Flask / Django)Solid understanding offull-stack architecture, REST APIs, and backend developmentHands‐on experience withLangChainfor LLM application developmentHands‐on experience withLangGraphfor building and orchestrating AI agentsKnowledge ofRAG architectures, embeddings, and vector databasesProficiency withGit, version control, and collaborative development workflowsETHEREUM 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. ETHEREUM 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 ETHEREUM 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