Nikos Karayannidis
Data Engineering Lead
Greece
Summary
🤩
Rockstar🎓
Top SchoolNikos Karayannidis is a Data Engineering Lead with 13 years of experience shaping enterprise data platforms and leading large engineering teams across Greece and international telco/tech organizations. He has led cloud migrations and unified analytics initiatives—designing Data Vault, dimensional and lakehouse architectures—and currently heads a 20+ engineer team building pipelines on Azure Databricks and Snowflake. A PhD in databases fuels his deep expertise in query processing, data modeling and performance optimization, while industry roles at OTE, Pex and IOHK show a rare blend of academic rigor and hands-on system building. He mentors chapters and defines engineering standards, driving consistent, secure data practices at scale. Outside of enterprise work he contributes to functional-programming projects (notably to a Plutus IR compiler) and is an Emacs/Linux/Haskell enthusiast, reflecting a persistent interest in formalism and robust tooling.
13 years of coding experience
26 years of employment as a software developer
Ph.D. Computer Science / Databases / Query Processing and Optimization in Data Warehouses, Ph.D. Computer Science / Databases / Query Processing and Optimization in Data Warehouses at National Technical University of Athens
Github Skills (3)
compiler10
blockchain9
smart-contracts9
Programming languages (19)
Github contributions (5)
IntersectMBO/plutus
Jan 2020 - Jan 2023
The Plutus language implementation and tools
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 releases, 746 reviews, 172 commits in 3 years
Contributions summary:Nikos primarily worked on the Plutus IR compiler, modifying its behavior to handle let-bindings correctly. They addressed issues related to the order of definition for let-bindings in the PIR compiler, and fixed code style through re-running stylish-haskell. Furthermore, they added comments on let-scoping and adjusted the PIR.Let constructor for improved functionality, including refactoring the compiler to take a NonEmpty list.
programming-languageblockchainsmart-contractsplutus
bezirg/abs2haskell
Feb 2014 - Feb 2016
Contributions:214 commits, 121 pushes, 1 branch in 2 years
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