Alexander Stefanov
Lead Data Engineer
Sofia, Sofia-City, Bulgaria
Summary
👤
Senior🎓
Top SchoolAlexander Stefanov is a Lead Data Engineer with nine years of hands-on experience designing and migrating large-scale data platforms, currently leading data engineering at Apex Group in Sofia. He has driven cloud migrations from AWS to Azure, transformed Alteryx workflows into production-grade Airflow DAGs, and re-architected DBT orchestration to improve reliability and save roughly $1M in operational costs. Comfortable across the stack, he blends ML/NLP experience—building roBERTa-based sentiment models and semantic search—with robust ETL, Airflow, and data visualization work for multinational clients. A former university full-stack developer and teaching assistant, he pairs practical production engineering with a knack for mentoring and onboarding new engineers. Fluent in German and English, he brings an analytical, research-informed approach to ambiguous business questions, favoring useful approximations over false precision.
9 years of coding experience
4 years of employment as a software developer
Master of Engineering - MEng Computer Science, Master of Engineering - MEng Computer Science at University of AberdeenGerman with English Foreign Languages and Literatures General, German with English Foreign Languages and Literatures General at Foreign Language High School “Zaharii Stoyanov”
English, German, Bulgarian
Stackoverflow
239reputation
3kreached
10answers
5questions
Github Skills (182)
minecraft10
bignum10
fabric10
editing10
minecraft-forge10
gnome-shell10
scrollable10
computercraft10
window-management10
quilt10
integer-arithmetic9
interval-arithmetic9
integer9
api9
chromeos9
Programming languages (21)
Github contributions (5)
umnikos/Bare-Metal-Encryption
Dec 2020 - Jan 2023
Contributions:7 releases, 92 pushes, 5 branches in 2 years 1 month
AlexStefanov2/nodegame
Jan 2017 - Sep 2018
Contributions:9 commits, 2 PRs, 3 pushes in 1 year 8 months
nodesprompt
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