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AI Full Stack Engineer at Randstad Technologies Recruitment – London | Jobyssey

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AI Full Stack Engineer

AI Full Stack Engineer

Randstad Technologies Recruitment · London, United Kingdom · 6 days ago

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Category: Fullstack
Salary: GBP 291 – 388 / day

agentic-ai ai api aws azure ci-cd cloud containerization embeddings gcp json langchain langgraph

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machine-learning

prompt-engineering

Contract AI Full Stack Engineer role in London (Fenchurch Street) building multi-agent, stateful LLM applications with Python, LangChain/LangGraph, Google ADK, and Gemini/OpenAI/Claude. Day to day covers secure Python API development, AWS OpenSearch vector search, prompt engineering and guardrails, plus LLM observability using LLM-as-a-Judge evaluation.

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.

AI Full-Stack Engineer: Multi-Agent Systems & LLMs

Randstad Technologies · London, United Kingdom

6 days ago

aiapicloudlangchain