Title : AI Developer Location : Wrexham
We’re the leaders in outsourced calls, live chat and more, delivering brilliant conversations on behalf of businesses of all sizes. Fast-forward two decades and what started as a single, dedicated PA (who’s still with us today) looking after calls for a handful of local clients, is now a 1000-strong team working across continents from our state-of-the-art UK headquarters in Wrexham, and our US office in Atlanta.
The role – AI Developer – AI Agent Voice Assistant Platform:
Moneypenny’s AI voice agent is live, handling thousands of customer calls across the UK and US. We are seeking an experienced Python developer to help us scale faster. You will be developing, maintaining, and enhancing Chinwag, the AI system that powers our voice agents. Your work will cover voice processing, agent orchestration, task scheduling, and external integrations with MCP servers.
This is an exciting opportunity to work on patent-pending technology at production scale, delivering real-world AI solutions used daily by our customers.
Strong proficiency in Python 3.11+, with a deep understanding of asyncio, threading, and concurrent programming patterns.
Knowledge of modern development practices, including pytest testing and Git version control.
Applied AI/LLM Development
Essential experience in LLM prompt engineering and optimisation, including designing effective system prompts, managing conversation context, and structuring prompts to ensure reliable AI agent responses and tool usage.
Keen interest in and passion for AI technologies and their practical applications.
Strong understanding of security principles and data governance, with a focus on maintaining strict control over where sensitive data is stored and processed.
Experience building commercial solutions with LLMs from Google and OpenAI.
Knowledge of microservices architecture, particularly with MCP servers.
Experience with cloud platforms (AWS/Azure) and CI/CD pipelines.
Familiarity with monitoring and observability tools, particularly DataDog for LLM observability.
Frontend experience with VueJS or Streamlit.
Python 3.11+ • FastAPI • asyncio • OpenAI • Docker • MongoDB • pytest • Git • Twilio • Deepgram • ElevenLabs • LiteLLM • Groq • LangChain • MCP servers • AWS/Azure • DataDog • SendGrid • ActivePieces
As an AI Developer at our award-winning headquarters in Wrexham, you’ll enjoy welcoming, spacious, state-of-the-art offices, plus communal spaces including a treehouse – we like to do things differently around here! Permanent contract
~25 days annual leave plus bank holidays (pro rata)
~ Mental health support (through our Employee Assistant Programme) with access to an on-site mental health counsellor
~ Access to our wellbeing room to help enhance your physical and mental wellbeing
~ Free on-site gym access
~ If you require any adjustments to the recruitment process, please let us know so we can help you to be at your best!