Senior Agentic AI Developer

Virgin Media Business Ireland; Bradford; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Competitive salary

25 days annual leave +5

Birthday leave +3 days after 5 years

Wellbeing benefits

Pension contribution 10%

Car benefit scheme

Learning platform access

Innovative, fast-paced team

Job summary

LibertyBlume is seeking two Senior Agentic AI Developers for Bradford/Leeds in a permanent, hybrid role. You will design and deploy agentic AI systems, build multi-agent workflows and robust RAG architectures, and integrate APIs and data sources to extend capabilities.

You’ll collaborate with product, data and research teams to translate complex AI concepts into scalable, production-ready solutions, while optimizing performance, reliability, and scalability of deployed AI systems.

Qualifications

• Significant commercial experience in software engineering with AI/ML delivery track record.
• Advanced proficiency in Python and AI frameworks (LangGraph, LangChain, OpenAI APIs).
• Experience building and deploying agentic AI systems and robust RAG architectures.
• LLM fine-tuning, prompt engineering, and context management skills.
• Knowledge graphs/semantic data modelling (RDF, LPG, Neo4j).
• Cloud platforms and MLOps tooling (GCP, Docker).

Responsibilities

• Design and develop agentic AI systems in Bradford/Leeds.
• Architect multi-agent workflows for reasoning, planning and memory.
• Build and optimise RAG solutions with LLMs and vector stores.
• Develop knowledge graph pipelines for semantic search and reasoning.
• Integrate external APIs and data into agentic frameworks.
• Collaborate with product, data and research teams to productionize AI concepts.
• Optimize AI systems for performance, scalability and reliability.
• Stay updated with AI orchestration research and practices.

Skills

Python

LangGraph

LangChain

OpenAI APIs

Agentic AI systems

LLM fine-tuning

Prompt engineering

Knowledge graphs

RAG architectures

Semantic data modelling

Education

Numerical degree

Tools

Docker

GCP

Job description

We’re looking for x2 Senior Agentic AI Developers to join our team in Bradford or Leeds on a permanent basis. This hybrid role offers flexibility, with two days in the office and three days working remotely.

What will you be doing?

• Design and develop agentic AI systems using LangGraph, Python, and related orchestration frameworks.
• Architect and implement multi-agent workflows encompassing reasoning, planning, memory, and tool usage.
• Build and optimise Retrieval-Augmented Generation (RAG) solutions integrated with LLMs, vector databases, and knowledge graphs.
• Develop and maintain knowledge graph pipelines to support context retrieval, semantic search, and reasoning.
• Integrate external APIs, data sources, and tools into agentic frameworks to extend agent functionality.
• Collaborate with product, data, and research teams to translate advanced AI concepts into production-ready solutions.
• Optimise deployed AI systems for performance, scalability, and reliability.
• Stay up to date with emerging research and advancements in LLM orchestration, agent frameworks, and AI reasoning.

We tend to look for people with:

• Essential: Significant commercial experience in software engineering, with a strong track record of designing, building, and delivering AI/ML solutions.
• Advanced proficiency in Python and modern AI frameworks, including LangGraph, LangChain, and OpenAI APIs.
• Demonstrated experience building and deploying agentic AI systems, including the development of robust RAG architectures (vector stores, document indexing, and retrieval pipelines).
• Hands-on expertise in LLM fine-tuning, prompt engineering, and effective context management.
• Practical knowledge of knowledge graphs and semantic data modelling, using technologies such as RDF, LPG, Neo4j, and SpannerGraph.
• Strong understanding of modern cloud platforms and MLOps tooling, including GCP and containerisation with Docker.
• Excellent problem-solving skills, with the ability to translate research concepts into scalable, production-ready systems.
• Desirable: Experience with LangGraph and agent orchestration frameworks.
• Desirable: Background in AI reasoning, planning, or multi-agent systems.
• Desirable: Familiarity with transformer architecture and vector database technologies (Pinecone, Weaviate, Chroma).
• Desirable: Contributions to open-source AI/agentic projects.
• Degree in a numerical degree preferred.

What’s in it for you?

• Competitive salary.
• 25 days annual leave with the option to purchase 5 more.
• Enjoy your birthday off, plus receive an additional 3 days of annual leave once you reach 5 years of service.
• Access to wellbeing and mental health benefits such as the Calm app, personal medical, critical illness cover and dental insurance, plus many more.
• Matched pension contribution up to 10%.
• Access to our car benefit scheme.
• Access to our online learning platform to continue to develop and grow your career with us.
• The chance to join an innovative, fast-paced and passionate team.

Who we are:

#LibertyBlume a Liberty Global company, is a rapidly growing business services provider, specialising in tech-enabled back-office solutions. Our mission is to deliver efficiency, scale and value to our customers through Business, Procurement and Financial Solutions. If you’re curious, customer centric and enjoy being one step ahead, join us on our scale up journey and unlock your freedom to grow!

Liberty Global is an equal opportunity employer, committed to an inclusive environment and accommodating all candidates.

We’re eager to hear from you, no matter your background. Our growth is creating great opportunities! Our team is expanding, and we want to hire the most talented people we can. Continued success depends on it!

Thanks for your interest in working on our team!!