Notes — Catalog

Full-stack software engineer building useful tools. Constantly learning, with a habit of connecting dots across different domains.

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DRAWER NOTES

CAT. YN—N

05 ENTRIES

01 JUN 26 2026

Getting started with FastSpring Connecting FastSpring to your product so purchases grant access — and renewals, lapses, and cancellations keep it in sync.

fastspringwebhooksbilling

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02 JUN 15 2026

Handling Paddle Subscription Lifecycle Events: A Practical Webhook Integration Guide Keeping an internal entitlements system in sync with Paddle — and the undocumented edge cases that bite in production.

paddlewebhooksbilling

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03 JUN 02 2026

Our Self-Healing Cache Wouldn't Stop Healing A cached null in Redis, a silent TTL change, and millions of queued jobs.

rediscachingincident

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04 MAY 26 2026

From 1 Second to 55ms: How I Redesigned Concurrency and Locking for License Activation Making a hot, correctness-critical endpoint fast under load — by changing what we locked and how.

postgresredisperformance

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05 MAY 17 2026

Why Web Apps Hate Printers (And How I Fixed It with LLMs and CSS) A simple print task that turned into a deep dive on CSS pagination — and how different LLMs reason.

cssprintingai

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NOTES 05

WORKS 02

LIBRARY 41