Oleg Lem
Senior Product Analyst at Data-Driven Lab
Belgrade, Central Serbia
Summary
👤
Senior🎓
Top SchoolOleg Lem is a Senior Product Analyst with 9 years of analytical and engineering experience, currently focused on product-led growth and data quality for fintech and AI startups in Belgrade. He designs experimentation frameworks and self-serve analytics stacks (GrowthBook, SQL/Python, Tableau/Looker Studio) and has run 10+ end-to-end A/B tests while building KPI trees and product-health dashboards that cut decision time by up to 35%. Oleg combines engineering rigor from his early aerospace design career with hands-on data work—automating monitoring, alerting, and reporting pipelines that raised CSAT and reduced verification time. He has a track record of diagnosing live KPI regressions, optimizing fraud detection, and migrating rule engines with zero critical regressions, preventing operational losses. Comfortable training cross-functional teams, he has tripled PMs’ self-serve SQL usage and freed analyst capacity through templating and workshops. Pragmatic and detail-oriented, he favors measurable impact: improved retention and revenue via targeted experiments and ML-enabled personalization.
9 years of coding experience
8 years of employment as a software developer
Master's degree in Engineering Aircraft and helicopter industry Engineering, Master's degree in Engineering Aircraft and helicopter industry Engineering at Moscow Aviation Institute (National Research University)
Russian, English, Spanish
Github Skills (9)
machine-learning6
python6
docker-image6
data-science5
postgresql-database5
xgboost5
docker4
packaging4
postgresql3
Programming languages (2)
Github contributions (5)
LoGoFiOS/data_analyst
Apr 2021 - Dec 2022
Contributions:9 commits, 8 pushes, 1 branch in 1 year 8 months
LoGoFiOS/roadmap_python_junior
Dec 2020 - Apr 2022
Contributions:48 commits, 47 pushes, 1 branch in 1 year 3 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.