Bahn Project Manager — rail infrastructure portfolio platform
Platform for managing rail infrastructure and station-development projects across 14 technical departments, driven by a 1,298-project public dataset.
Problem
Infrastructure project portfolios live in spreadsheets split by department; cross-departmental dependencies and budget rollups are invisible.
Approach
Typed data model over a 1,298-project dataset, department-level rollups, dependency views, built test-first with Vitest. Built on public data only — no employer systems or internal data involved.
Outcome & proof
Public repository with the full data model and test suite.
TypeScriptReact 19ViteVitest