Nikos Katirtzis
Tech Lead Distributed Systems & ML AI at Expedia Group
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolNikos Katirtzis is a tech lead specializing in distributed systems and AI/ML platforms with 12 years of experience building and operating large-scale infrastructure at Expedia Group. He architects vendor-agnostic, multi-model AI systems and pioneered internal adoption of agentic patterns and the Model Context Protocol, taking concepts from PoC to production while securing IP (patent pending). He has led reliability and cloud platforms for fleets of 40k+ nodes across hundreds of Kubernetes clusters, cutting log volume by >85% and improving LLM token efficiency and latency by >90% to deliver substantial cost and performance gains. Nikos combines research rigor—an MSc with published work on ML/NLP for code and API usage mining—with hands-on contributions to open source (notably enhancements to the widely used zoekt code-search tool). He’s a recognized conference speaker and organizational influencer who establishes standardized architectural patterns for generative AI services and embeds observability, chaos engineering, and developer productivity into platform design. Based in London, he thrives at the intersection of applied ML, systems engineering, and scalable developer tooling.
11 years of coding experience
7 years of employment as a software developer
Master of Science (MSc), Computer Science | Computer Systems, Software Engineering & High Performance Computing, Master of Science (MSc), Computer Science | Computer Systems, Software Engineering & High Performance Computing at The University of EdinburghMaster of Engineering - MEng, Electrical and Computer Engineering | Electronic & Computer Engineering, Master of Engineering - MEng, Electrical and Computer Engineering | Electronic & Computer Engineering at Aristotle University of Thessaloniki (AUTH)High School Diploma, Computer Science Studies, High School Diploma, Computer Science Studies at 3rd Lyceum of Serres
Greek, English, German
Github Skills (6)
git10
go10
cicd9
github-enterprise9
docker8
dockers8
Programming languages (11)
Github contributions (5)
google/zoekt
Nov 2018 - Jul 2019
Fast trigram based code search
Role in this project:
Backend Developer & DevOps Engineer
Backend Developer & DevOps EngineerContributions:5 commits, 4 comments, 8 issues in 8 months
Contributions summary:Nikos primarily focused on enhancing the project's infrastructure and expanding its compatibility with various Git hosting services. They added support for BitBucket Server by implementing the necessary API interactions and mirroring capabilities. Furthermore, the user made improvements to the indexing process and added the functionality to delete stale repositories in the BitBucket Server mirror, thereby improving the stability of the indexing service. In addition, the user incorporated GitHub Enterprise and made changes to the configuration of the index server.
pythonsearchcode-searchtrigram
nikos912000/grpcdemo
Jan 2020 - Feb 2022
Demo application for a Spring Boot service which exposes a gRPC endpoint. Built using Maven.
Contributions:9 commits, 3 PRs, 5 pushes in 2 years 2 months
spring-bootmavengrpcspringendpoint
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