alt-f6/edtech-billing-core
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Concurrency-safe billing on PostgreSQL: append-only ledger, idempotent webhooks, randomized invariant tests
3 mentions on Hacker News by 1 person: 1 story, 2 comments · first 2026-10-06 · latest 2026-11-12
20082026
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…CRM + LMS for a study-abroad company used daily by 25 staff across 3 branches. Public billing core: https://github.com/alt-f6/edtech-billing-core (append-only ledger, race-safe payments, 110 integration tests on real Postgres; a randomized…
comment by Proph8 · 2026-11-12 · in Ask HN: Who wants to be hired? (November 2026) -
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Show HN: A billing ledger on Postgres, tested with randomized invariantsstory by Proph8 · 2026-10-23 · 0 comments
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…CRM + LMS for a study-abroad company used daily by 25 staff across 3 branches. Public billing core: https://github.com/alt-f6/edtech-billing-core (append-only ledger, race-safe payments, 104 integration tests on real Postgres; a randomized…
comment by Proph8 · 2026-10-06 · in Ask HN: Who wants to be hired? (October 2026)