Short essays

North Star Metrics Lie

Tracking the North Star metric is like looking through a telescope. You clearly see your goal but if you do it too long you may miss anything that happens at your feet.

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A/B testing

Aggregation bias in A/B tests

A Data Scientist tries to run an A/B test not considering Aggregation Bias. You won't believe what happens next!

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How to prioritise everything in Data Science

Three simple rules which can help you to triage your backlog in a right way.

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Knowledge is a jigsaw puzzle

A few thoughts on learning process and knowledge

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