AI Full Stack Engineer

Job Overview

• Role: AI Full Stack Engineer (AI & ML Engineer)




• Location: Fenchurch Street, London




• Duration: Oct 12, 2026 - Dec 15, 2026 (9 Weeks, 2 Days)




• Hours: 40 hours/week




• Rate: 291 PAYE / 388 Umbrella

Core Technical Stack

• Programming & APIs: Python, RESTful API development, JSON Schema, Pydantic.




• AI & LLMs: Gemini, OpenAI, Claude.




• Frameworks & Orchestration: Google ADK, LangChain, LangGraph.




• Data & Search: AWS OpenSearch (Indexing and Vector embeddings - Highly emphasized), Database Architecture (Intermediate).




• Infrastructure: Public Cloud (GCP, AWS, or Azure), containerization, CI/CD pipelines.

Key Responsibilities

• Agentic Systems: Build multi-agent, stateful, and asynchronous workflows.




• LLM Management: Handle prompt engineering, context/memory management, hallucination controls, guardrails, and fallback logic.




• Observability: Implement tracing and evaluation frameworks, specifically utilizing LLM-as-a-Judge patterns.




• Backend Engineering: Develop secure Python APIs and maintain strong testing and deployment disciplines.