opentripplanner/OpenTripPlanner
Jan 2026 – Jan 2026
1 Month active
Languages Used
Java
Technical Skills
Javabackend developmentrouting algorithmstest-driven developmentunit testing
Håkon Bliksås Carlsen
PROFILE
Håkon Bliksås Carlsen
Håkon Bliksas Carlsen enhanced carpool routing accuracy in the opentripplanner/OpenTripPlanner repository by refactoring the duration calculation for multi-stop carpools, shifting from a baseline approach to using the actual origin-to-destination duration. This adjustment improved routing precision and user experience for complex carpool scenarios. He also addressed test reliability by refactoring InsertionEvaluatorTest to use deterministic routing functions, ensuring consistent outputs for identical inputs and reducing flaky tests in continuous integration. His work demonstrated strong backend development skills in Java, with a focus on routing algorithms, unit testing, and test-driven development, resulting in more stable releases and safer deployment processes.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
259
Activity Months1
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59 peopleSame Organization
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Work History
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026 focused on enhancing carpool routing accuracy and reinforcing test reliability for the opentripplanner/OpenTripPlanner project. Key deliverable: Carpool Routing Duration Enhancement, which refactors duration calculation for multi-stop carpools to use the origin-to-destination duration instead of the baseline, improving routing precision and user experience (commit 33001d88b68276d699df7ba156f89077eb0607e9). Major bug fix: InsertionEvaluatorTest was refactored to use deterministic routing functions, ensuring identical outputs for identical inputs and boosting test reliability (commit ad6174dfa8d84c4ad5842a1cdc297458ae4287c5). Overall impact: higher quality carpool routing and more stable CI, enabling faster iteration and safer deployments. Technologies/skills demonstrated: Java, routing algorithm refinement, unit/integration testing, test determinism, and commit traceability.
2 Commits • 1 Features
Jan 1, 2026January 2026 focused on enhancing carpool routing accuracy and reinforcing test reliability for the opentripplanner/OpenTripPlanner project. Key deliverable: Carpool Routing Duration Enhancement, which refactors duration calculation for multi-stop carpools to use the origin-to-destination duration instead of the baseline, improving routing precision and user experience (commit 33001d88b68276d699df7ba156f89077eb0607e9). Major bug fix: InsertionEvaluatorTest was refactored to use deterministic routing functions, ensuring identical outputs for identical inputs and boosting test reliability (commit ad6174dfa8d84c4ad5842a1cdc297458ae4287c5). Overall impact: higher quality carpool routing and more stable CI, enabling faster iteration and safer deployments. Technologies/skills demonstrated: Java, routing algorithm refinement, unit/integration testing, test determinism, and commit traceability.
January 2026
Activity
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
Javabackend developmentrouting algorithmstest-driven developmentunit testing
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