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AI Developer

Job in Reading, Berkshire, RG1, England, UK
Listing for: Diagonal Matrix Ltd
Full Time position
Listed on 2026-03-06
Job specializations:
  • Software Development
    AI Engineer, Machine Learning/ ML Engineer
Salary/Wage Range or Industry Benchmark: 60000 - 80000 GBP Yearly GBP 60000.00 80000.00 YEAR
Job Description & How to Apply Below

AI Developer / AI Engineer (LLM, RAG & Agentic AI)

We are seeking a highly skilled and innovative AI Developer to design, develop, and deploy advanced AI-powered applications using modern LLM, RAG, and Agentic AI architectures. The ideal candidate will have strong hands‑on experience in Python-based AI development and practical exposure to frameworks such as Lang Chain, Lang Graph, and OpenAI ecosystems.

You will play a key role in building scalable AI solutions, implementing Retrieval-Augmented Generation (RAG) systems, developing AI agents, and integrating embeddings with vector databases.

Key Responsibilities

AI & LLM Development
  • Design and implement AI applications using Large Language Models (LLMs).
  • Integrate OpenAI APIs and other foundation models into production systems.
  • Develop and optimize prompt engineering strategies for accuracy and performance.
  • Build and deploy scalable AI services and APIs.
RAG & Knowledge Systems
  • Design and implement Retrieval-Augmented Generation (RAG) pipelines.
  • Develop ingestion pipelines for document processing and embedding generation.
  • Implement semantic search using vector databases.
  • Optimize chunking strategies, embeddings, and retrieval logic.
Agentic AI & Orchestration
  • Build intelligent AI Agents using Lang Chain and Lang Graph.
  • Implement state management, multi-step workflows, and tool integrations.
  • Design agentic workflows for task automation and decision-making.
  • Work with specification-driven development approaches for AI systems.
Embeddings & Vector Databases
  • Generate embeddings using OpenAI or other embedding models.
  • Implement and manage vector databases (e.g., FAISS, Chroma, Pinecone, etc.).
  • Optimize similarity search performance and retrieval strategies.
AI Architecture & Integration
  • Develop AI-driven microservices using Python.
  • Integrate AI Foundry or enterprise AI platforms into enterprise solutions.
  • Ensure scalable, secure, and maintainable AI architectures.
  • Implement monitoring, evaluation, and observability for AI models.
Engineering Best Practices
  • Follow specification-driven development methodologies.
  • Write clean, modular, and testable Python code.
  • Conduct code reviews and maintain high engineering standards.
  • Collaborate with cross-functional teams (Product, Dev Ops, Data).
Required Technical Skills (High-Level)
  • Python (Advanced proficiency)
  • Lang Chain
  • Lang Graph
  • AI Agent Development
  • Embeddings & Vector Databases
  • OpenAI API Integration
  • Large Language Models (LLMs)
  • AI Foundry Platforms
  • Prompt Engineering
  • Specification Driven Development
  • Retrieval-Augmented Generation (RAG)
Additional Preferred Skills
  • Experience with FAISS / Chroma / Pinecone / Weaviate
  • Experience building REST APIs (FastAPI / Flask)
  • Understanding of Transformer architecture
  • Experience with cloud platforms (Azure / AWS / GCP)
  • Knowledge of CI/CD for AI systems
  • Experience with evaluation frameworks for LLMs
  • Exposure to fine-tuning or model optimization techniques
Soft Skills
  • Strong analytical and problem-solving ability
  • Ability to translate business requirements into AI solutions
  • Excellent communication skills
  • Self-driven and innovative mindset
  • Ability to work in fast-paced environments
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