๐๐๐๐ ๐ฃ๐ข๐ง๐๐ก๐๐ฌ ๐๐๐ฌ๐ฆ ๐๐ก ๐๐๐ฆ๐ง๐ฅ๐๐๐จ๐ง๐๐ ๐ฆ๐ฌ๐ฆ๐ง๐๐ ๐ฆ
Systems send requests twice. This leads to double payments or duplicate orders.
Idempotency keys stop this.
Here is how they work:
- Your client sends a unique key with the request.
- Your server checks if this key exists in the database.
- The server processes the request if the key is new.
- The server returns the original response if the key exists.
Follow these rules for better backend engineering:
- Keep systems simple.
- Complexity kills reliability.
- Use data to find bottlenecks.
- Automate every manual step.
- Test edge cases before you deploy.
Build a simple version first. Improve it as you learn. Document your choices for your team.
Audit your systems this week. Find one gap. Fix it.