Stefan Kizim
Senior Software Engineer at Rivian
Malmo, Sweden
Summary
👤
Senior🎓
Top SchoolStefan Kizim is a Senior Software Engineer with 11 years of experience building performance-critical back-end systems, currently working on EV navigation and routing at Rivian. He has deep expertise in C++, Rust, and real-time systems, with a track record at Mapbox improving offline search indexes and at Wargaming optimizing game client performance and stability. Stefan contributes to open-source routing (Valhalla), focusing on maintenance and correctness that directly improve routing accuracy for OpenStreetMap users. He has led teams and teaching efforts, redesigned curricula, and sped up infrastructure processes—reducing search index generation time fourfold and cutting memory use in half. Based in Malmö, Sweden, he combines low-level systems thinking with product-focused delivery for automotive and embedded domains.
11 years of coding experience
9 years of employment as a software developer
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Belarusian State UniversityPhysics and Mathematics, Physics and Mathematics at BSU Lyceum
Русский, English, Swedish
Github Skills (7)
openstreetmap10
routing-slip10
c-language10
routes10
cprogramming-language10
boost10
testing10
Programming languages (7)
Github contributions (5)
valhalla/valhalla
Aug 2024 - Apr 2025
Open Source Routing Engine for OpenStreetMap
Role in this project:
Back-end Developer
Back-end DeveloperContributions:68 reviews, 22 PRs, 94 comments in 8 months
Contributions summary:Stefan primarily focused on removing unused headers and making minor code adjustments across various files within the Valhalla routing engine. The commits demonstrate a focus on code cleanup and maintenance, with changes made to files related to transit ingestion, testing, and route summary generation. The user also addressed specific issues, such as fixing oneway ferry connections and blocked route reclassification, which directly impacts the routing logic and accuracy of the engine.
osrmmulti-modalnominatimtileddijkstra
kinkard/StepicCppCourse_final_test
Mar 2016 - Nov 2021
Contributions:25 pushes, 1 branch in 5 years 9 months
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