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- šÆ Move fast and break things
šÆ Move fast and break things
Lessons from Facebook's early engineering culture
Read time: 5 minutes 3 seconds

So it turns out this is breakdown #100.
Only realised this when I was updating the website and had one of those moments where 100 existential thoughts hit you at once.
Thought #1: Wild how much your life can change when you give something a solid crack 100x in a row.
Thought #2: Also wild that Iām probably only 10-20% of the way to 10,000 hours of writing these, considering its how I spend half my working week for the past 2 years.
Thought #3: Also wild that it only took 100 breakdowns to grow to 100,000 readers.
ā¦
Thought #100: Starting this newsletter was best decision Iāve ever made.
Thank you so much for being here.
(Sending extra love to the 1322 of you who were here on launch day and are still reading!)

Hereās to the next 100.
ā Tom


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Chess Move
The what: A TLDR explanation of the strategy
āMove fast and break thingsā
Facebookās motto.
Originally a spiky stance - now a Silicon Valley cliche.
If you ask any venture-backed startup about their āvaluesā or ācultureā, theyāll unconvincingly regurgitate something about speed.
Donāt get me wrong - itās the correct input.
But too often folks miss the most important part of the motto.
Whatās always fascinated me about āMove fast and break thingsā is the admission of the trade-off.
Speed means imperfection.
āMove fastā creates an unspoken fear.
āMove fast and break thingsā acknowledges and tolerates the consequences.
A while back I came across this epic blog post from early Facebook engineer Aditya Agarwal exposing a handful of specific practices that propagated their culture of breakneck product velocity.
Iām a sucker for original startup content that is so practical it becomes a manual, and I always wanted to go deeper on this topic.
Todayās piece represents a few weekās worth of scouring the internet for early facebook lore, packaged into a playbook for how to actually create a fast-moving, ownership-driven company.
A note before we jump in: The story of Facebookās early culture is a story of extremes. Extreme speed, extreme empowerment, and extreme outcomes.
Itās not the right playbook for everyone. It has both positive and negative implications.
But I think youāll know if this is right for you.
āIf you never break anything, youāre probably not moving fast enough.ā





Breakdown
The how: The strategic playbook boiled down to 3x key takeaways
1. Day 1 pacesetting
From the moment you logged in, the clock started.
Facebook had an internal guideline called āThe 45 Minute Ruleā that said: new employees should start working on something productive within their first 45 minutes.
45 minutes in = Start something productive
End of Day 1 = Dev environment set up.
End of Day 2 = Shipped a change to live users.
"We like to teach what's important very early on, on Day One... Each new recruit needs to take a deep breath. Within a few days, all are expected to be pushing live software updates out to the better part of a billion users."
"By [my] first week [I] had shipped more software code at Facebook than [I] did in seven years at VMware."
To scale this philosophy from a hacker house to 1000ās of developers, Facebook created an infamous onboarding program called āBootcampā.
For 6 weeks, every engineer (from fresh college grads to incoming directors who wouldnāt even be writing code themselves):
Rotated across projects and teams of their choosing
Fixed real bugs
Shipped small features
Got granted access to the entirety of Facebookās codebase, with the trust that they could dive in and contribute anywhere.
A senior Bootcamp mentor would review their commits before they went live, but the message was clear: you (a) own your impact, and (b) are empowered to have impact immediately.
Instead of assigning you to a team at hiring, Facebook let you choose your home at the end of Bootcamp. This forced you to explore the surface area of the product, meet people across the org, and self-assess where you can have the highest impact.
Early engineer Andrew āBozā Bosworth (now CTO), who started the Bootcamp, explained āWhen I started Bootcamp⦠I didnāt teach the culture as it was. I taught the culture as I wished it were.ā
The idealised hacker culture Boz taught ābecame the culture. It was self-fulfilling.ā

2. You are what you celebrate

Facebook hard-wired speed into its cultural source code by rewarding it consistently: post-mortems, performance reviews, and hackathons were all designed to celebrate taking initiative.
The company fostered a āblameless post-mortemā culture where even serious screw-ups were treated matter-of-factly rather than with finger-pointing, which āencouraged engineers to learn from their mistakes and to take risksā.
As long as you owned the recovery and fix, breaking something big could even boost your reputation internally as someone willing to take action. Instead of condemnation, you got a nod of respect for pushing the envelope.

They had an internal saying that āCode wins argumentsā - ideas were best proven by building rather than debating.
Performance reviews focused on impact, not intellectual jockeying.
Doing things to make everyone faster was explicitly rewarded. Prolific shippers progressed the fastest.

The first Facebook Hackathon took place in 2007 when engineer Pedram Keyani emailed colleagues asking if anyone wanted to stay late and hack; dozens showed up, and they coded until dawn. āThe next day, Mark [Zuckerberg] approached [Keyani] saying how awesome it was,ā and from then on they organised a hackathon every 6ā8 weeks.
If you attended a Hackathon, you werenāt allowed to āwork on the same thing that your day job is,ā forcing people to step out of their usual comfort zones and experiment. And if it was your first time at a hackathon, participation was mandatory ā no spectators allowed.
Many of Facebookās signature features began as hackathon projects:
Facebook Messenger was created in 2008 by a couple of engineers after an all-night hackathon and launched to users the next day.
Same story with the āLikeā button.
In late 2010, a team of two engineers, one intern, and a designer built a prototype of Timeline in a single hackathon - a small team continued to push it forward, and today its one of the most popular (and profitable) products of all time.
If the idea was good, the demo would speak for itself. The ultimate manifestation of āCode wins arguments.ā

3. Donāt focus on the break, focus on the fix

Moving fast was a requirement
and moving fast meant breaking things
but broken things need fixing fast
so moving fast meant fixing fast too
Facebook was one of several pioneers who brought the concept of āChaos Engineeringā to mainstream development practices. First crystalised at Netflix in 2011, Chaos Engineering is the discipline of intentionally breaking systems to prove theyāre resilient.
In the following years, Facebook was one of the first tech companies to run aggressive failure injection and large-scale disaster drills to test their own ability to bounce back from unexpected outages.
"Facebook created Project Storm in the wake of 2012's Hurricane Sandy. Although the hurricane itself didn't affect Facebook, it served as a wake-up call... In 2014, Facebook took the step of turning off traffic to one of their data centers."
Facebook also popularised the concept of āfeature flagsā - separating deploy from release to safely ship, test, and progressively roll out features to selected users.
"With Gatekeeper, your feature could be rolled out slowly to any specific subset of users (country, age, device, etc), and rolling back changes took minutes⦠It was ultra-fast and safe to get code into productionāwe continuously pushed code 24/7. Your code would slowly roll out to different tiersāfirst to employees, then to 1% of the population, then gradually to all regions and users."
In 2014, Zuckerberg announced that Facebook had āchanged our internal motto from:
āMove fast and break thingsā ā āMove fast with stable infrastructure.āā
Part tongue-in-cheek, part acknowledgement that building systems with billions of users required a different engineering philosophy to building college student profiles.



Rabbit Hole
The where: 3x high-signal resources to learn more
[3 minute read]
Come for the nostalgia of peak Facebook. Stay for the shocking ratio: 1.2 million users per engineer.
Written by Boz when the company headcount was crossing āDunbar's numberā (~150, the maximum number of stable social relationships a human can maintain), this is the blueprint that defined how Facebook thought about:
Throwing new hires into production on day one
Letting engineers choose their own teams
Preventing organisational silos before they form
[5 minute read]
Noah Kagan was employee number #30 at Facebook. He got fired 9 months later, and went on to build AppSumo, a software marketplace doing $100m per year.
Here are 10 things he learned from his time at early Facebook.
āWe shipped several updates to the site every day. In comparison, companies like Microsoft would take months to write out product details, discuss them in a lot of meetings, and finally build them.ā
[10 minute read]
First distributed when the company reached 1 billion users in late 2012, the Little Red Book contains Facebookās distilled philosophy.
This is the full 148-page scan that defined a generation of startups figuring out how to scale startup culture.

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