Education

• PhD, 2026 - ongoing
  Karlsruhe Institute of Technology
  Advisor: Peter Sanders
• Master of Science, 2023-2026
  Karlsruhe Institute of Technology
• Bachelor of Science, 2019-2023
  1. University of Heidelberg (2020-2023)
  2. Hochschule Mannheim (2019-2020)
• Abitur, 2019
  Hohenstaufen Gymnasium Kaiserslautern

Work Experience

• Apple, 2027
  • Apple Maps Intern, 07/2027 – 09/2027 (upcoming), Cupertino, California
• Tramli GmbH, 2025 - ongoing
  • Software Developer, 06/2025 – ongoing
    1. Extended backend services to flexibly support various public transit data sources (GTFS and GTFS-RT).
    2. Collaborated closely with the founder on the German market launch, contributing to UI design, testing, and data validation features.
• MENTZ GmbH, 2024
  • Internship, 04/2024 - 06/2024
    1. Prototype of a RAPTOR-based public transit router (Range-RAPTOR, McRAPTOR), including SIMD and prefetching optimizations, in C++20.
    2. Validated the implementation against a custom CSA implementation and adapted it to practical requirements such as non-transitive footpaths.
    3. Extended a production public transport router for the dynamic generation of connection links.
• Institut für Theoretische Informatik, Algorithm Engineering, 2023
  • Student Research Assistant, SS 23 - WS 23/24
• Algorithm Engineering Group, 2022 - 2023
  • Student Research Assistant, WS 22/23
  • Tutor Algorithms & Data Structures 2, WS 22/23
  • Tutor Algorithms & Data Structures 1, SS 22

Publications

• T-REX: Fast and Dynamic Journey Planning for Continental-Scale Public Transit Networks
  34th Annual European Symposium on Algorithms (ESA 2026), 2026
  DOI: 10.4230/LIPIcs.ESA.2026.9 | paper | arXiv | code
  Co-authors: Jonas Sauer, Sascha Witt
• FLASH-TB: Integrating Arc-Flags and Trip-Based Public Transit Routing
  Transportation Science 60(2), 242–263, 2026
  DOI: 10.1287/trsc.2023.0481 | arXiv | code
  Co-authors: Ernestine Großmann, Jonas Sauer, Christian Schulz, Sascha Witt
• Parallel Hub Labeling for Reachability on DAGs
  arXiv preprint, 2025
  arXiv:2507.21204 | paper | code
• Optimal FIFO Grouping in Public Transit Networks
  arXiv preprint, 2023
  arXiv:2308.06629 | paper | code
• Arc-Flags Meet Trip-Based Public Transit Routing
  21st International Symposium on Experimental Algorithms (SEA 2023), LIPIcs 265, 16:1–16:18, 2023
  DOI: 10.4230/LIPIcs.SEA.2023.16 | paper | arXiv | code
  Co-authors: Ernestine Großmann, Jonas Sauer, Christian Schulz

(Code) Projects

• T-REX (GitHub)
  Code for my master’s thesis.
• FLASH-TB Code (GitHub)
  Code for my paper "FLASH-TB: Integrating Arc-Flags and Trip-Based Public Transit Routing".
• CCH (GitHub)
  Code for the "Routenplanungs-Praktikum" at the KIT. Implements Customizable Contraction Hierarchies.
• More on GitHub.

Documents

• Bachelor’s Thesis (pdf)
• FLASH-TB Talk (pdf)
• Master’s Thesis (pdf)
• Master’s Thesis Defense (pdf)
• T-REX Talk (pdf)