Leo Messen
Technical Consultant
- Agentic AI and Generative AI
- AWS Cloud Architecture
- Full-stack engineering (Python, TypeScript, .NET)

Leo is a Software Engineer at Cortex Reply, specializing in agentic AI solutions. He has developed AI agents capable of handling complex customer queries by drawing on live data, with architecture designed to operate across email, WhatsApp and SMS, and has contributed to Digital Colleagues, Reply's own platform for accelerating clients' Generative AI initiatives. He has also worked on AWS-based communication platforms for major brands, including easyJet. A Computer Science graduate of the University of Manchester with a specialization in AI, Leo holds multiple AWS certifications and brings rigorous, technically grounded expertise in translating generative AI from concept into practical, customer-ready solutions.
Writing by Leo

AI Enablement
Prompt caching in agentic systems: cut the cost of every loop
Discover how prompt caching significantly reduces costs in agent loops, and how to optimise prompt structure for cache hits.
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Digital Colleagues
Early Challenges of Utilising MCP Servers
Model Context Protocol (MCP) is a recently introduced open standard designed to facilitate seamless interactions between AI models and external tools and resources. Recently, this…
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