SDET Code @SDETCode
The coding platform where you find the bugs. Write pytest. Kill mutations. Prove your QA skills. Built for QA engineers and SDETs. Free to start. sdetcode.com sdetcode.com Joined March 2026-
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We ran an AI through 670 mutation testing challenges (195 sessions): - Type bugs: 28.6% kill rate - Validation bugs: 46.2% - Logic bugs: 47.5% - Boundary bugs: 63.8% - Overall: 51.8% That 28.6% number is not a typo. sdetcode.com
QA engineers have no LeetCode equivalent. LeetCode trains you to write code. QA work is the opposite — finding what's wrong with code someone else wrote. Mutation testing fills that gap: dev.to/sdetcode/why-m…
100% line coverage ≠ your tests catch bugs. A function can execute every line and still let an off-by-one ship. The real metric: kill ratio — what % of injected bugs your tests detect. That's mutation testing.
No account. No setup. Just go to sdetcode.com and write a pytest test right now. 3 mutation testing challenges, free, in your browser. If you've never killed a mutant before — this is the fastest way to start.
Something is launching tomorrow for QA engineers. No algorithms. No linked lists. Just bugs. Hidden in real code. Waiting for your tests to find them. Tomorrow, 12:01 AM PT. #SDET #MutationTesting #QAEngineering
How do you measure test quality? A) Code coverage B) Mutation score (kill ratio) C) "It works on my machine" D) We don't Be honest. #QAEngineering #SDET #SoftwareTesting
How do you measure test quality? A) Code coverage B) Mutation score (kill ratio) C) "It works on my machine" D) We don't Be honest. #QAEngineering #SDET #SoftwareTesting
QA Engineer, SDET, or test automation engineer? This was built for you. Try your first challenge: sdetcode.com What bug types do you find hardest to catch? #QAEngineering #MutationTesting #SDET #pytest
The AI Benchmark is something I'm proud of. You solve a challenge. Then you see how GPT-4o-mini, GPT-4o, and GPT-5.2 performed on the same problem. If you catch a mutation that an AI missed — that's a real, measurable skill signal.
Introducing SDET Code: the first coding challenge platform built specifically for QA Engineers. Write pytest tests. Kill code mutations. Prove your skills. 655+ challenges. AI coaching. Runs in your browser. Free to start. sdetcode.com
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