Senior AI Engineer

JR United Kingdom; Watford; Remote; GBP 100,000 - 130,000; Full time

Job summary

A prominent AI solutions company is seeking a Senior AI Engineer to build and optimise LLM integrations and agentic systems. With a focus on performance and real impact, the ideal candidate will have 3+ years of experience in full-stack development, particularly with Python, and a solid grasp of RAG pipelines. This role offers the chance to work on meaningful AI projects in a fast-paced environment, with opportunities for remote work.

Qualifications

• 3+ years' experience as a full-stack engineer with strong Python skills.
• Track record with LLMs, agentic systems, and RAG pipelines.
• Familiarity with containerisation and modern ML deployment tools.

Responsibilities

• Build and optimise RAG pipelines and integrations.
• Develop robust AI systems with tool chaining.
• Collaborate with researchers to productionise models.

Skills

Python

LLMs

Agentic systems

RAG pipelines

Containerisation

API design

Observability tools

React

Next.js

Tools

Docker

AWS

PyTorch

Elasticsearch

Job description

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Senior AI Engineer, Watford, Hertfordshire

Client: iO Associates - UK/EU

Location: Watford, Hertfordshire, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views:

1

Posted:

22.08.2025

Expiry Date:

06.10.2025

Job Description:

Hiring: Senior AI Engineer (LLMs, Agents, RAG)

Location: Remote (UK or Canada)

Type: Full-time | Permanent

Salary: Up to £130,000 or $240,000 Canadian

Are you passionate about building real AI systems that get used in production? Interested in LLMs, RAG pipelines, and agentic software, with the freedom to make a real impact?

My client is a well-funded early-stage team helping enterprise clients in regulated sectors deploy scalable AI without overhauling their infrastructure. They focus on performance, maintainability, and fast iteration. No fluff, just outcomes. They're now looking for engineers who want to help shape that future.

What You'll Be Working On:

• Building and optimising RAG pipelines including chunking, embeddings, and vector search
• Creating full LLM integrations using OpenAI, Hugging Face, and orchestration frameworks
• Developing robust AI agent systems with tool chaining and multi-step logic
• Building real-time frontend interfaces using React, Next.js, and Vercel AI SDK
• Containerising services using Docker and deploying to AWS (ECS, Lambda)
• Collaborating with researchers to productionise transformer models (e.g., PyTorch, HF)
• Using observability tools like Langfuse to monitor prompt and model performance
• Writing clean, modular, testable code that scales in production environments

What They're Looking For:

• 3+ years' experience as a full-stack engineer with strong Python skills
• Proven track record with LLMs, agentic systems, and RAG pipelines
• Experience with vector databases, embeddings, and semantic search
• Solid grasp of prompt engineering and LLM integration best practices
• Familiarity with containerisation, API design, and modern ML deployment tools

Bonus if:

• Experience with PyTorch or model fine-tuning
• Open-source contributions to LLM or AI infrastructure tools
• Experience with Elasticsearch or OpenSearch for retrieval
• Familiarity with Terraform, GitHub Actions, or infrastructure automation
• Built document processing pipelines involving PDFs, HTML, or structured data
• Interest in async workflows and distributed data processing

If you're ready to work on meaningful, high-impact AI problems in a fast-moving team, we'd love to hear from you.

Apply now or drop us a message to chat more.