Building invite flows that don't have race conditions in SvelteKit + Postgres

<p>Short answer: keep an invitation in a pending state, verify the claimant's identity, and create the user record only after that proof succeeds. For a B2B SaaS product, make the

<blockquote> <p><strong>TL;DR:</strong> In ParkEase, my peer-to-peer parking marketplace, two drivers can tap "Book" on the same slot at the same moment. The app doesn't prevent a

<p>Executive Summary: To eliminate race conditions in a high-concurrency ticketing system, I implemented PostgreSQL's FOR UPDATE clause for row-level database locking alongside Go

<p>Most Playwright suites stop right before the hard part of a signup flow: the "confirm your email" link, the emailed 6-digit code, the password-reset mail. The usual reasons are

<p>In a multi-tenant B2B platform, data leakage is an extinction-level event. If Property A logs into your dashboard and accidentally sees the guest data or revenue metrics for

<p>Modern backend applications handle thousands or even millions of requests every second. Users perform actions simultaneously: buying products, transferring money, updating

<blockquote> <p><em>JWT tutorials only teach the easy part. Here's what happens after.</em></p> </blockquote> <p>Most auth tutorials end at "user logs in, gets a token, done." And