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Riding the Sour Train: Building surtoget.no wit...

Avatar for John John
March 21, 2026
Programming
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Riding the Sour Train: Building surtoget.no with Gleam

A two-part talk: first on how technical skills can help shed light on real-world societal problems — using surtoget.no as a case study — then on driving correctness through the type system.

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John

March 21, 2026
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Transcript

  1. Riding the Sour Train: Building surtoget.no with Gleam

  2. • Developer/tech lead/architect • Worked with startups, healthcare, insurance, banking,

    transportation and stuff. • Bad at FE

  3. This talk

  4. This talk

  5. None
  6. None

  7. But what is a Sørlandsbanen anyway? Lunde

  8. But what is a Sørlandsbanen anyway? Lunde Type 73 (20)

    Strømmen

  9. But what is a Sørlandsbanen anyway? Lunde

  10. But what is a Sørlandsbanen anyway? Lunde

  11. But what is a Sørlandsbanen anyway? Lunde

  12. But what is a Sørlandsbanen anyway? Lunde

  13. But what is a Sørlandsbanen anyway? Lunde

  14. But what is a Sørlandsbanen anyway? Lunde

  15. But what is a Sørlandsbanen anyway? Lunde

  16. But what is a Sørlandsbanen anyway? Lunde

  17. None
  18. None
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  20. None
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  23. Developers are uniquely equipped to turn their craft into social

    impact

  24. Typing

  25. Link: https://www.youtube.com/watch?v=3lYHFctx2Ks

  26. None

  27. Is this a valid email?

  28. None

  29. Dependencies and tight coupling

  30. Validation failure Communication failure

  31. None
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  37. email_validator.gleam welcome_sender.gleam

  38. welcome_sender.gleam email_validator.gleam newsletter_sender.gleam dark_pattern_sender.gleam

  39. welcome_sender.gleam Web API Batch jobs Other? All forced to validate!

  40. None
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  44. “Make Illegal States Unrepresentable” - Yaron Minsky

  45. Use your technical skills to amplify your voice (for good)

    What I want you to remember: Use types to make illegal states a compile-time issue
  46. None