Dimitris Kontokostas
Principal Software Engineer, Data Platform
Greece
Summary
🤩
Rockstar🎓
Top SchoolDimitris Kontokostas is a Principal Software Engineer focused on large-scale knowledge graphs, data quality and platform engineering with 14 years of experience, currently leading data platform work at Medidata Knowledge Graph. He combines academic rigor (PhD magna cum laude in large-scale knowledge extraction) with production experience from Diffbot and GeoPhy and a long history with the DBpedia community where he boosted extraction speed, precision and system stability. A co-author of "Validating RDF Data" and creator of RDFUnit, he played a key role in designing RDF validation standards—co-editing SHACL and chairing the ShEx community group. His open-source contributions include substantial refactors to the widely used DBpedia extraction-framework to replace legacy feeders and improve data quality. Based in Greece, he pairs machine-learning methods for knowledge fusion with pragmatic pipeline and platform engineering to keep massive knowledge graphs fresh, accurate and production-ready.
15 years of coding experience
19 years of employment as a software developer
Masters in Web Science, Mathematics and Computer Science, 92, Masters in Web Science, Mathematics and Computer Science, 92 at Aristoteleion Panepistimion ThessalonikisDoctor of Philosophy (PhD), Large-scale knowledge Extraction, publishing & Quality Assessment, magna cum laude, Doctor of Philosophy (PhD), Large-scale knowledge Extraction, publishing & Quality Assessment, magna cum laude at Leipzig UniversityPolytechnic 5-year degree, Electronic & Computer Engineering, 82.6, Polytechnic 5-year degree, Electronic & Computer Engineering, 82.6 at Polytechnion Kritis
English, Greek
Stackoverflow
913reputation
72kreached
21answers
5questions
text-files
top-5%
Github Skills (18)
java10
javas10
text-files9
wikidata9
api8
database-design8
api-doc8
mysql8
api-design8
rdf6
sparql6
web-scraping6
semantic-web6
linux6
ruby6
Programming languages (11)
Github contributions (5)
dbpedia/extraction-framework
Jan 2011 - Jan 2018
The software used to extract structured data from Wikipedia
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 releases, 14 reviews, 1402 commits in 7 years
Contributions summary:Dimitris appears to have focused on refactoring the code base and adding core functionality by replacing legacy components and improving performance. This is evident in the commit messages, which describe replacing older feeders with a general-purpose OAI feeder. They also made changes to improve the quality of the information extracted from the existing templates. The user also worked on improving the overall stability of the system.
pythonstructured-datastructuredwikipedia
dbpedia/dbpedia-live-mirror
Jun 2014 - Aug 2018
Keeps a mirror of DBpedia live in sync
Contributions:95 commits, 2 PRs, 8 pushes in 4 years 1 month
dbpediadatabasesync
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