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ENGINEERING

How Companies Like Stripe and Uber Review Code at Scale

Engineering Manager

Core_Engineer

Date

DEC 12, 2025

Time

10 min

How Companies Like Stripe and Uber Review Code at Scale

Reviews That Matter

At small scale, code reviews are informal. At large scale, they become infrastructure.

Companies like Stripe and Uber review millions of lines of code per year without grinding development to a halt. This is not accidental.

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Code Review Is a Communication Channel

Reviews are not primarily about catching bugs.

They are about sharing context, spreading knowledge, and aligning on standards.

The most valuable comments explain why, not just what.

Small Changes Move Faster

Large diffs are harder to review correctly.

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Elite teams optimize for small, incremental changes that can be understood quickly.

This improves both quality and velocity.

Ownership Is Explicit

At scale, “anyone can review” becomes “no one owns.”

High-performing organizations define clear ownership for code areas.

Reviews reinforce accountability, not bureaucracy.

Automation Filters Noise

Formatting, linting, and basic correctness are enforced automatically.

Humans focus on architecture, correctness, and long-term impact.

This makes reviews intellectually engaging instead of exhausting.

Psychological Safety Is Non-Negotiable

Reviews fail when they become adversarial.

Great review cultures assume good intent and prioritize learning.

Feedback targets code, not people.

Speed and Rigor Are Not Opposites

Well-designed review processes increase speed by preventing rework.

Fewer bugs escape. Fewer incidents occur. Trust grows.

Reviews Encode Culture

What gets commented on signals what the organization values.

Consistency, clarity, and maintainability are taught one diff at a time.

Scaling Trust

At massive scale, no one understands the entire system.

Code reviews become how organizations distribute trust safely.

That is their real purpose.