Majid Hajiheidari
Senior Machine Learning Engineer at Picnic Technologies
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolMajid Hajiheidari is a Senior Machine Learning Engineer with 11 years of experience building production ML and big-data systems across marketplaces and consumer platforms. He has driven measurable impact—boosting mapping/grouping rates and pricing accuracy at Vio.com and cutting pipeline cost/time by 30% at Divar—by combining Apache Spark, PyTorch, Kubernetes and DVC into robust, scalable pipelines. As a technical leader at Cafe Bazaar he managed a team of seven, delivered internal data products, and redesigned auction and recommendation systems that materially improved engagement and ad conversion. Comfortable from infrastructure to modeling, he pairs a statistics background with hands-on engineering to push research-quality models into reliable production. Outside work he channels his interest in robotics and cycling into practical tinkering that often inspires new data-driven ideas.
11 years of coding experience
5 years of employment as a software developer
High School Diploma Mathematics and Physics, High School Diploma Mathematics and Physics at Allame Helli 7Bachelor of Science - BS Statistics, Bachelor of Science - BS Statistics at University of Tehran
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (53)
apache-spark10
spark10
python10
nearest-neighbors10
r10
big-data10
machine-learning10
similarity10
apache10
hadoop10
jdbc10
analytics10
java10
large-scale10
numpy10
Programming languages (6)
Github contributions (5)
hhdri/pizza
Mar 2017 - Jan 2019
A simple algorithm for dividing a circle into 'n' equal areas from a point
Contributions:7 commits, 2 PRs, 30 pushes in 1 year 9 months
hhdri/notebooks
Dec 2022 - Dec 2024
Contributions:22 pushes, 2 branches in 1 year 11 months
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