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.

If interested kindly email me your updated CV to dona. thomas@ randstaddigital. com.

Randstad Technologies is acting as an Employment Business in relation to this vacancy