For six years we’ve been hammering away on this little website of ours, feeding the needs of a steadily growing user-base with awesome features, freaky-good SEO and an elegant, performant architecture. What started out as a couple of guys in a room together is now nearly forty engineers developing a diverse set of systems that serve over 35 million unique visitors per month. We’ve come a long way in that time and covered a lot of ground — but our source control log still has blame lines from PayPal co-founder and initial Yelp investor Max Levchin, so it’d be hard...

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