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Guest Spotlight: Rich Liebling

Rich Liebling, Senior Director of Engineering at Learneo
Rich Liebling
Learneo | Engineer

About Rich Liebling

Rich Liebling is Senior Director of Engineering at Learneo, the company behind Course Hero. As the first engineering hire at Shop It To Me, he helped grow the service from 50,000 to one million subscribers in nine months on the back of 300 A/B tests a year, and he has championed engineering-led experimentation ever since, including Learneo's multi-armed bandit framework.

Notable Quotes

"Someone has a hypothesis and you wanna test it, great, but also test the opposite of that hypothesis."

"It was surprising how often the opposite direction actually won. But also even just knowing that something had an effect, it tells you that this thing, this knob matters."

"We set our goal to do 300 A/B tests by the end of the year, and we felt if we can do that, we'll get enough winners, and we can become viral."

"Their second merge request was very often an idea of their own to A/B test."

"The more focused your tests are, I think the more clear your learnings."

Learneo on testing the opposite of every hypothesis with Rich Liebling
Rich Liebling
Learneo | Senior Director of Engineering

Learneo on testing the opposite of every hypothesis

Go to S1 | E38

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Takeaways

All Takeaways

Analysis friction sets the ceiling on testing velocity. Three days of ad hoc SQL per test quietly discourages teams from running more.

Go to S1 | E38

Make experimentation part of hiring and onboarding. Every new engineer's second merge request was their own test idea.

Go to S1 | E38

Translate a growth goal into an execution count. One million subscribers is not actionable. 300 A/B tests by year end is, and everyone can influence it.

Go to S1 | E38

Keep tests small and focused. Redesign a whole page and lose, and you learn that version failed but not what to change next.

Go to S1 | E38

Test the opposite of every hypothesis. At Shop It To Me the inverse won surprisingly often, and even when it lost it proved the variable mattered.

Go to S1 | E38
The experimentation edge podcast logo with a picture of host Ashley Stirrup