Rainer Kujala
Lead Data Scientist
Helsinki Metropolitan Area Finland
Summary
👤
Senior🎓
Top SchoolRainer Kujala is a Lead Data Scientist based in the Helsinki area with 11 years of experience building data-driven products that deliver measurable business value, particularly in supply chain and mobility. He blends hands-on modeling and engineering with people leadership, having progressed from researcher and founder to team lead and senior manager roles at RELEX and other data-focused organisations. His work spans the full lifecycle from concept and simulation to production deployments, with a strong background in Python, SQL, cloud tooling and algorithmic solutions for routing, pooling and replenishment. He retains a researcher's rigor from a doctoral background at Aalto University and has contributed open-source tooling for transport network analysis, reflecting a long-standing interest in human mobility and public transit. Known for moving back to hands-on roles to "be closer to where the magic happens," he pairs strategic product thinking with the practical skills to ship robust ML systems. Colleagues value his ability to translate complex domain problems into actionable models and measurable outcomes.
11 years of coding experience
11 years of employment as a software developer
Doctor of Science (Tech.) Computer Science, Doctor of Science (Tech.) Computer Science at Aalto University
English, German, Swedish, Finnish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (14)
sqlite10
gtfs10
python10
transit-data8
public-transport8
datasets8
transit7
steam7
mobility6
api6
public-transportation5
data-visualization5
xml3
openstreetmap2
Programming languages (2)
Github contributions (5)
rmkujala/ptn_temporal_distances
Oct 2016 - Jul 2017
Contributions:71 commits, 15 pushes, 3 branches in 9 months
CxAalto/gtfspy
Sep 2016 - Mar 2019
Public transport network analysis using Python 🚊🚇🚃🚌🛳️🚡🚠🚞
Contributions:3 releases, 373 commits, 1 PR in 2 years 6 months
pythongtfsroutingsqlite
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