Theofilos Kakantousis
Senior Engineering Manager at Klarna
Stockholm, Sweden
Summary
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Rockstar🎓
Top SchoolTheofilos Kakantousis is a senior engineering manager based in Stockholm with 10 years of experience building and scaling data platforms for ML and analytics in regulated environments. He currently leads Klarna’s Data Foundations organization, overseeing the central data lake, ETL/transformations, and workflow orchestration while driving GDPR and fintech compliance. A hands-on leader who began as a co-founder and core engineer at Hopsworks, he has deep distributed systems and big data credentials (Spark, Kafka, Flink, Airflow) and contributed backend improvements to the well-known Hopsworks platform. He combines product leadership experience—raising VC funding and serving on a company board—with practical engineering delivery, reducing data product SLAs by over 90% at Klarna. He also coaches engineering teams, shapes hiring pipelines, and runs large community programs (Klarna Engineering meetups), reflecting a blend of technical depth and organizational scale-up expertise. Notably, his background includes low-level YARN/Hadoop resilience work and multi-tenant production pipelines, signaling a rare mix of infrastructure rigor and product sensibility.
10 years of coding experience
10 years of employment as a software developer
Bachelor of Science (B.Sc.) Computer Science, Bachelor of Science (B.Sc.) Computer Science at Athens University of Economics and BusinessMaster of Science (M.Sc.) Software Engineering of Distributed Systems, Master of Science (M.Sc.) Software Engineering of Distributed Systems at KTH Royal Institute of Technology
Stackoverflow
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Github Skills (12)
task-management10
backend10
back-end-development10
python10
angularjs9
javascript9
docker8
rest-api8
dockers8
ui-design7
front-end-development7
uid7
Programming languages (9)
Github contributions (5)
logicalclocks/hopsworks
Jan 2018 - Jan 2022
Hopsworks - Data-Intensive AI platform with a Feature Store
Role in this project:
Back-end Developer
Back-end DeveloperContributions:23 releases, 117 reviews, 194 commits in 4 years
Contributions summary:Theofilos primarily contributed to the `hopsworks-web` and `hopsworks-common` modules. They focused on improving the Jobs UI, including fixing issues with logs, deleting executions, and enhancing pagination. Their work also involved adding Docker job capabilities and implementing fixes for Python job configurations, showing a focus on back-end functionalities related to job management and system operations.
gcppythonserverlessai-platformhopsworks
tkakantousis/feature-store-api
Oct 2020 - Dec 2021
Python - Java/Scala API for the Hopsworks feature store
Contributions:233 pushes, 21 branches in 1 year 1 month
apipythonhopsworksscalafeature-store
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