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Category: Backend

All Frontend Backend Data & AI
Posted on: August 28th, 2025

How to Understand Zero-Knowledge Proofs (ZKP): “I Know It, But I Won’t Tell You”

A zero-knowledge proof lets me convince you a statement is […]

  • 1) ZKP: The Short, Human Version
  • 2) What Is It Good For? (Not just blockchains)
  • 3) Hands-On in One Afternoon (Pick ONE path first)
  • 4) The 10-Minute “Paper Demo”
  • 5) Five Newbie Pitfalls (and fixes)
  • [...]
Lucask
Posted on: August 24th, 2025

Idempotency Keys for Payments & Orders: No More Double-Charges, No More Drama

TL;DR — Give each potentially repeatable write (charge card, place […]

  • Why Idempotency Keys Still Matter (Yes, in 2025)
  • What Exactly Is an Idempotency Key?
  • Key Design: Scope, Format, and TTL
  • Storage Patterns: Postgres vs Redis (Fight! …Just Kidding)
  • Concurrency & Locking (No, Not the Thread Kind)
  • [...]
Lucask
Posted on: August 24th, 2025

API Versioning Made Clear: URL vs Header vs Schema

TL;DR — Start with URL path versioning for clarity and […]

  • Table of Contents
  • Why API Versioning Still Matters in 2025
  • Three Approaches: URL vs Header vs Schema
  • Compatibility Rules That Prevent Fire Drills
  • Caching, Gateways, and Routing
  • [...]
Lucask
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