Deployment practices: feature flags and tenancy versus environments

Charles-Axel advocates decoupling release from deploy using feature flags and discusses pros/cons of tenancies and staging environments.

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What does it take to do well at a hyper-growth company? In this episode of The Pragmatic Engineer, I sit down with Charles-Axel Dein, one of the first engineers at Uber, who later hired me there. Since then, he’s gone on to work at CloudKitchens. He’s also been maintaining the popular Professional programming reading list GitHub repo for 15 years, where he collects articles that made him a better programmer.

In our conversation, we dig into what it’s really like to work inside companies that grow rapidly in scale and headcount. Charles shares what he’s learned about personal productivity, project management, incidents, interviewing, plus how to build flexible skills that hold up in fast-moving environments.

Jump to interesting parts:

• 10:41 – the reality of working inside a hyperscale company

• 41:10 – the traits of high-performing engineers

• 1:03:31 – Charles’ advice for getting hired in today’s job market

We also discuss:

• How to spot the signs of hypergrowth (and when it’s slowing down)

• What sets high-performing engineers apart beyond shipping

• Charles’s personal productivity tips, favorite reads, and how he uses reading to uplevel his skills

• Strategic tips for building your resume and interviewing

• How imposter syndrome is normal, and how leaning into it helps you grow

• And much more!

If you’re at a fast-growing company, considering joining one, or looking to land your next role, you won’t want to miss this practical advice on hiring, interviewing, productivity, leadership, and career growth.

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Timestamps

(00:00) Intro

(04:04) Early days at Uber as engineer #20

(08:12) CloudKitchens’ similarities with Uber

(10:41) The reality of working at a hyperscale company

(19:05) Tenancies and how Uber deployed new features

(22:14) How CloudKitchens handles incidents

(26:57) Hiring during fast-growth

(34:09) Avoiding burnout

(38:55) The popular Professional programming reading list repo

(41:10) The traits of high-performing engineers