Full Stack Engineer

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Overview

The Senior Full-Stack Engineer will be responsible for developing and implementing advanced LLM-powered autonomous agents aimed at automating internal workflows. The contractor will work closely with a team focused on designing and deploying robust and reliable agent systems, contributing expertise in both front-end and back-end development using React and Node.js. This role is ideal for a candidate with a strong foundation in full-stack development and relevant experience in agentic system design and orchestration.

Responsibilities

  • Develop and implement LLM-powered autonomous agents for internal workflows.
  • Design and maintain scalable web applications using React and Node.js.
  • Create and optimize API services and async workflows.
  • Collaborate with team members to define and improve tool-use pipelines and orchestration logic.
  • Conduct prompt engineering and evaluate LLM performance effectively.
  • Troubleshoot and resolve technical challenges in a fast-paced environment.

Requirements

  • Extensive commercial experience with React, including hooks and state management, using TypeScript.
  • Significant experience in Node.js, focusing on API design and asynchronous workflows.
  • Demonstrated background in building LLM-powered applications or agents with frameworks like LangChain or LlamaIndex.
  • Proficient understanding of prompt engineering and LLM evaluation techniques.
  • Familiarity with vector databases (e.g., Pinecone, Weaviate) is a plus.
  • Exposure to Python-based frameworks and tools is advantageous.
  • Experience with streaming responses or websockets is preferred.
  • Working knowledge of cloud deployment on platforms such as AWS, GCP, or Azure for AI workloads.
SkillsReact, TypeScript, Node.js, Python, AWS, GCP, Azure
LocationUnited Kingdom
TypeHybrid
Rate
£600/day
SourceLinkedIn
RecruiterExplore Group
Posted15/07/26