Sebastian Köhler
AI LLM Engineer at EPI Company
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolSebastian Köhler is an AI LLM Engineer with 15 years of experience building high-precision, production-grade AI systems that bridge symbolic knowledge and generative models. He combines deep academic rigor—PhD-trained in bioinformatics with 60+ peer-reviewed publications and co-founder of the Human Phenotype Ontology—with hands-on engineering of RAG pipelines, autonomous agents, and test-case-driven LLM development. At Ada Health he designed synthetic data frameworks, knowledge-grounded NLP, and prototypes that improved entity and intent F1 by up to 20% while cutting cost and latency. Sebastian focuses on auditable, grounded AI for high-stakes environments (clinical diagnostics, regulatory settings), blending ontologies/knowledge graphs (Neo4j, RDF/OWL) with robust observability and guardrails. Based in Berlin, he is driven by turning complex semantic standards and Bayesian inference into practical, zero-error production systems.
15 years of coding experience
8 years of employment as a software developer
Doctor of Philosophy (PhD), Biomathematics, Bioinformatics, and Computational Biology, Doctor of Philosophy (PhD), Biomathematics, Bioinformatics, and Computational Biology at Freie Universität Berlin
German, English
Github Skills (128)
variants10
ontology10
semantic-web10
metadata10
owl10
genomics10
ontologies10
genes10
semantics10
reasoning10
foundry10
open-science10
rdf10
protege10
concert10
Programming languages (11)
Github contributions (5)
Phenomics/phenomics.github.io
Aug 2016 - Jan 2021
Website for the Phenomics and Machine Learning Team
Contributions:80 commits, 2 PRs, 82 pushes in 4 years 6 months
phenomicsmaterials-informaticsmachine-learningdata-science
obophenotype/zebrafish-phenotype-ontology-build
Apr 2011 - Feb 2018
:fish: Zebrafish Phenotype Ontology: Build Tools
Contributions:68 commits, 1 PR, 1 push in 6 years 11 months
owlzebrafishsemanticsphenotypefish
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