Maintaining product quality

As teams grow, product quality can drop. Features ship faster, but bugs increase, and technical debt builds up because urgent work always takes priority. The “ship it and fix later” approach that works in small teams becomes risky when millions use your product.

To maintain quality:

• Code reviews: Every change must be checked by another developer.
• Automated tests: Run tests automatically whenever code is updated.
• Staging environments: Use a copy of production to catch problems before release.
• Code coverage: Require at least 80% of new code to be tested. When building or updating features, write new tests to maintain that coverage and prevent bugs from slipping in.

These rules may slow down individual changes, but they prevent bigger problems and speed up overall delivery. Also, track quality metrics like crash rates, page load times, and support tickets. Set limits and treat any breach as urgent.