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J

JoT

Personal blog · fffej.substack.com · on HN as jefffostercareerprogramming

JoT is a personal blog at fffej.substack.com about career and programming. Since 2025, 7 different Hacker News readers have linked it 28 times, most often “Fix your flaky tests first”. It is still writing: the last post was on 2026-11-02, and you can follow it by feed.

Visit the blog
28mentions?
7HN people?
2025–2026first – last linked?
Links on Hacker News per year · peak 19 in 2025

A place for me to practice writing on things that interest me, usually something to do with technology or leadership.

The author on HN?

jefffoster · 1,547 karma · member since 2007

Based in Cambridge, UK. Contact me at jeff.foster AT acm.org I write words at https://fffej.substack.com/

From their public HN profile, which links to this site.

Most-linked posts?

  1. Fix your flaky tests first
    2 people · 2 mentions · first linked 2025-03-05
  2. Code reviews as a tool to build capability
    2 people · 2 mentions · first linked 2025-09-02

What Hacker News says?

  1. I’ve been thinking about this too. There’s this notion of variety popularized by cybernetics folks a long time ago. Variety is like the state space of the system. Then there’s a law that says “only variety absorbs variety”. So if a method has high variety then it must have an equally complex implementation to handle the variety. When there is a mismatch it means that either the method has parameters that aren’t usef…

    Comment linking /p/only-variety-can-absorb-variety

    on “Benchmarking Opus 5 on SlopCodeBench”
  2. Submitted Measuring Engineering as a story · 37 points

    HN discussion
  3. Submitted Accountability as a story · 4 points

    HN discussion
  4. Submitted The Root Cause Fallacy as a story · 3 points

    HN discussion
  5. Submitted The cost of producing code is approaching zero as a story · 3 points

    HN discussion
  6. Submitted The Overton Window as a story · 3 points

    HN discussion
  7. Submitted The Viable Systems Model as a story · 3 points

    HN discussion
  8. Submitted Things Traffic Flow can teach us about software development as a story · 3 points

    HN discussion
  9. Submitted Things Queueing Theory can teach us about software development as a story · 3 points

    HN discussion
  10. Submitted Nineteen Features, Zero Architecture as a story · 2 points

    HN discussion
  11. Submitted Cheap Code means more Governance as a story · 2 points

    HN discussion
  12. Submitted Hotelling's Law as a story · 2 points

    HN discussion
  13. Submitted Quick Questions for Better Strategy as a story · 2 points

    HN discussion
  14. Submitted Entropy Is Spare Capacity as a story · 1 points

    HN discussion
  15. Submitted Training was just a side effect as a story · 1 points

    HN discussion
  16. Submitted Software Engineering is dead (again) as a story · 1 points

    HN discussion
  17. Submitted The Spam Economy Comes to Work as a story · 1 points

    HN discussion
  18. Submitted From Correctness to Recoverability as a story · 1 points

    HN discussion
  19. Submitted Exploration vs. Exploitation as a story · 1 points

    HN discussion
  20. Submitted Authority Gradients as a story · 1 points

    HN discussion
  21. Submitted Code reviews as a tool to build capability as a story · 1 points

    HN discussion
  22. Submitted Code reviews as a tool to build capability as a story · 1 points

    HN discussion
  23. Submitted Supporting your mid-level engineers as a story · 1 points

    HN discussion
  24. Submitted Leverage as a story · 1 points

    HN discussion
  25. Submitted Changing Culture as a story · 1 points

    HN discussion
  26. Submitted Fix your flaky tests first as a story · 1 points

    HN discussion
  27. Submitted How should you use AI? as a story · 1 points

    HN discussion
  28. Submitted Fix your flaky tests first as a story · 1 points

    HN discussion

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