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    Guided course · Architecture and Design in .NET

    .NET System Design Case Studies: back to the course

    Module 2 · Case Studies · Lesson 5 of 12

    Case: URL Shortener with Base62 Codes, Snowflake IDs and Collision Math

    20 min readTechInterviewNotes Editorial TeamUpdated 13 Oct 2026Save

    This lesson comes with Full Access

    Its text, video and cheat sheet open with Full Access. This course's free lessons open without an account. Start with Running a .NET System Design Case: Requirements, Capacity Math and the Answer Shape.

    See Full AccessCourse outline