Stefan Schröder
Co-Founder at GraphHopper GmbH
Munich, Bavaria, Germany
Summary
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RockstarStefan Schröder is a software engineer and entrepreneur with 13 years of experience focused on vehicle routing, transport simulation, and logistics software. As Co-Founder of GraphHopper GmbH and long-time lead developer on the open-source jsprit toolkit, he blends product leadership with deep back-end engineering in Java. His research background at KIT and DLR informs pragmatic implementations of complex algorithms, from regret insertion strategies to custom scoring functions for routing and freight carriers. Active in prominent open-source projects like GraphHopper and MATSim, he has contributed transport-specific features such as carrier-based freight runs and geojson-driven location integration. Based in Munich, he is comfortable moving between research-grade simulations and production routing services, often building infrastructure that makes advanced insertion and scoring strategies easier to extend. Colleagues describe him as someone who turns academic rigor into maintainable, real-world logistics software.
12 years of coding experience
9 years of employment as a software developer
Github Skills (12)
data-structures10
javas10
algorithms10
mat10
data-structure10
java10
transport9
agent-based-simulation9
transit9
public-transportation9
planning9
public-transport9
Programming languages (4)
Github contributions (5)
graphhopper/jsprit
Jun 2013 - Oct 2022
jsprit is a java based, open source toolkit for solving rich vehicle routing problems
Role in this project:
Backend Developer
Backend DeveloperContributions:17 releases, 2123 commits, 83 PRs in 9 years 6 months
Contributions summary:Stefan's primary focus was on implementing new features related to regret insertion and building infrastructure to simplify the creation of new insertion strategies. The commits indicate the addition of a new scoring function and a default scorer as well as refinements of the general code. The user also worked on implementing features that improve the overall solution and code clarity of the existing vehicle routing problem.
starcraftvrpsolvingproblemsrouting
matsim-org/matsim-libs
Oct 2015 - Nov 2015
Multi-Agent Transport Simulation
Role in this project:Back-end Developer
Back-end DeveloperContributions:19 commits, 9 pushes, 4 comments in 6 days
Contributions summary:Stefan contributed to the `matsim-libs` repository by adding a freight run with a single carrier. They modified Java files within the `playgrounds/sschroeder` directory related to scoring functions and pharmacy-related code. The changes appear to integrate geojson data for pharmacy locations. They also added files for a fake scenario with carrier vehicle definitions.
agent-basedtransportation-planningagentagent-based-modelmatsim
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