Erik Bernhardsson

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Modeling conversion rates using Weibull and gamma distributions

2019-08-05 This is a blog post originally featured on the Better engineering blog. If you want to link to this article or share it, please go to the original post URL! Separately, I'm sorry it's been so long with no posts on this blog. Read more…

Why software projects take longer than you think: a statistical model

2019-04-15 Anyone who built software for a while knows that estimating how long something is going to take is hard. It's hard to come up with an unbiased estimate of how long something will take, when fundamentally the work in itself is about solving something. Read more…

Headcount goals, feature factories, and when to hire those mythical 10x people

2019-02-21 When I started building up a tech team for Better, I made a very conscious decision to pay at the high end to get people. I thought this made more sense: they cost a bit more money to hire, but output usually more than compensates for it. Read more…

Data architecture vs backend architecture

2019-01-10 A modern tech stack typically involves at least a frontend and backend but relatively quickly also grows to include a data platform. This typically grows out of the need for ad-hoc analysis and reporting but possibly evolves into a whole oil refinery of cronjobs, dashboards, bulk data copying, and much more. Read more…

The hacker's guide to uncertainty estimates

2018-10-08 It started with a tweet: New years resolution: every plot I make during 2018 will contain uncertainty estimates — Erik Bernhardsson (@bernhardsson) January 7, 2018 Why? Because I've been sitting in 100,000,000 meetings where people endlessly debate whether the monthly number of widgets is going up or down, or whether widget method X is more productive than widget method Y. Read more…

I don't want to learn your garbage query language

2018-08-30 This is a bit of a rant but I really don't like software that invents its own query language. There's a trillion different ORMs out there. Another trillion databases with their own query language. Another trillion SaaS products where the only way to query is to learn some random query DSL they made up. Read more…

Business secrets from terrible people

2018-08-16 I get bored reading management books very easily and lately I've been reading about a wide range of almost arbitrary topics. One of the lenses I tend to read through is to see different management styles in different environments. Read more…
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Erik Bernhardsson

... is the founder of Modal Labs which is working on some ideas in the data/infrastructure space. I used to be the CTO at Better. A long time ago, I built the music recommendation system at Spotify. You can follow me on Twitter or see some more facts about me.