BackendData6 min read
An idempotent daily backfill that's safe to run twice
A backfill that isn't safe to re-run is a liability you put on a cron. Here's how we made every step a no-op the second time.
Sanskar Soni
Jun 17, 2026
Backend
4 posts tagged Backend.
BackendData6 min read
At-least-once webhooks with a one-row claim table
How a single unique constraint turns a noisy, duplicate-prone event stream into exactly-one webhook delivery per lead.
Sanskar Soni
Jun 17, 2026
BackendArchitecture6 min read
One active notification per lead: taming event storms with a partial unique index
A loan journey emits events faster than nudges can fire. Here's how we guarantee an applicant only ever gets the right one.
Ratnesh Maurya
Jun 17, 2026
BackendPerformance8 min read
Building a URL shortener that never guesses a code
Why we encode the primary key instead of generating random short codes, and what that decision removed from the system.
Ratnesh Maurya
Jun 17, 2026