AI-Powered Fullstack Engineer

Ethereum Technologies LLC; Sunnyvale (CA); On-site; USD 140,000 - 200,000; Full time

Job summary

Ethereum Technologies LLC is seeking a versatile Full-Stack Engineer to build production-grade web apps and design AI-powered agents using LangChain and LangGraph. You will implement responsive interfaces with React and robust backends with Python, while ensuring secure, scalable APIs and efficient workflows.

The role emphasizes integrating LLMs, tool-calling, memory, and multi-step reasoning, plus crafting RAG-based solutions with embeddings and vector databases.

Qualifications

• Proficiency in building production-grade web apps with React frontend and Python backend.
• Strong understanding of full-stack architecture, REST APIs and scalability.
• Hands-on experience with LangChain for LLM app development and LangGraph for orchestration.
• Knowledge of RAG, embeddings, vector databases and secure code practices.

Responsibilities

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

Skills

React

Python

LangChain

LangGraph

REST APIs

RAG architectures

Embeddings

Vector databases

Tools

Git

Job description

Ethereum Technologies LLC is seeking a versatile Full-Stack Engineer to build production-grade web apps and design AI-powered agents using LangChain and LangGraph. You will implement responsive interfaces with React and robust backends with Python, while ensuring secure, scalable APIs and efficient workflows.

The role emphasizes integrating LLMs, tool-calling, memory, and multi-step reasoning, plus crafting RAG-based solutions with embeddings and vector databases.