education

• PhD, 2026 - ongoing
  Karlsruhe Institute of Technology
• 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 productive 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 & Datastructures 2, WS 22/23
  • Tutor Algorithms & Datastructures 1, SS 22

publications

• T-REX: Fast and Dynamic Journey Planning for Continental-Scale Public Transit Networks (pdf)
  34th Annual European Symposium on Algorithms (ESA 2026)
  Co Authors: Jonas Sauer, Sascha Witt
• FLASH-TB: Integrating Arc-Flags and Trip-Based Public Transit Routing (pdf)
  Transportation Science
  Co Authors: Ernestine Großmann, Jonas Sauer, Christian Schulz, Sascha Witt
• Parallel Hub Labeling for Reachability on DAGs (pdf)
• Optimal FIFO grouping in public transit networks (pdf)
• Arc-Flags Meet Trip-Based Public Transit Routing (pdf)
  Co Authors: Ernestine Großmann, Jonas Sauer, Christian Schulz

(code) projects

• T-REX (GitHub)
  Code for my Master 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-Thesis (pdf)
• FLASH-TB Talk (pdf)
• Master-Thesis (pdf)
• Master-Thesis Defense (pdf)
• T-REX Talk (pdf)