Leonard Seffer
Director Of Engineering at Wolt
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolLeonard Seffer is a Director of Engineering based in Stockholm with a decade of experience building backend, data and machine learning systems, currently leading engineering at Wolt. He progressed internally from data scientist and engineer roles into management, combining hands-on expertise in stream processing and distributed computing with team and product leadership. Leonard’s background in insurance and financial mathematics gives him a strong quantitative foundation for designing robust data pipelines and ML-driven features. Known for bridging analytics and engineering, he focuses on scalable backends that operationalize models and real-time data. Colleagues describe him as a developer-first leader who still contributes technically while scaling teams and systems.
10 years of coding experience
9 years of employment as a software developer
Master of Science (M.Sc.) Insurance and Financial Mathematics, Master of Science (M.Sc.) Insurance and Financial Mathematics at Åbo Akademi UniversityBig Data Analytics Specialization studies Mathematics and Computer Science, Big Data Analytics Specialization studies Mathematics and Computer Science at Arcada University of Applied Sciences
Swedish, Finnish, English, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (76)
web-application10
bayesian-data-analysis10
python10
flask-restful10
stan10
stock-data10
finance10
alembic10
bayesian10
sqlalchemy10
cqrs9
docker-compose9
golang9
rabbitmq9
price9
Programming languages (7)
Github contributions (5)
lseffer/btc-guru
Jun 2019 - Mar 2020
predicting BTC/USD price
Contributions:32 commits, 2 PRs, 24 pushes in 8 months
usdpythonhighstocksdockerinfluxdb
lseffer/profile-page
Jan 2019 - Nov 2022
Personal profile page
Contributions:20 commits, 2 PRs, 34 pushes in 3 years 10 months
profile-pagesassstatic-sitegulpjavascript
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