Measuring AB Tests: SQL for p-value graphs in Redshift

So, in deciding when an AB test is actionable using p-value graphs we saw some cool charts that looked like:

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Tags: experiments, data warehousing, redshift, sql

Deciding When to Call an AB Test: p-value Graphs

So, you've read about how to get your event data in Redshift, you've read about the experiment exposure event, you've got your AB test ready to run, now... how do you decide if you've got a winner?

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Tags: experiments

AB Testing at ezCater Part 2: Tracking Experiments & The Exposure Event

What events should I fire to track an experiment?

A fabulous question and one with a number of different answers. During my travels I've found that there are 4 basic ways to try and tackle the problem

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AB Testing at ezCater Part 1: Event Taxonomy & Warehousing

Experiments! AB tests! On one hand it seems like everybody's doing it and on the other hand I regularly get the impression that a lot of people have found it to be more cumbersome than it’s worth. Worse, some blog posts I see imply that it’s leading folks down a path of micro-optimizations based on totally insignificant amounts of data. So what does it look like to have an AB testing framework that actually works?

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Tags: experiments, data warehousing

Zero to Production - Part 1: Architecture

We started the ezCater iOS app in August 2016. We had a basic working API, an opportunity to build an app from scratch, and six engineers ready to do it. Right on time, four months later, we launched our first iOS app. Within hours, we had a brand new customer successfully place an order.

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About ezCater

We're the #1 online – and the only nationwide – marketplace for business catering in the United States. We make it easy to order food online for your office. From routine office lunches to offsite client meetings, from 5 to 2,000 people, we have a solution for you. ezCater connects business people with over 50,000 reliable local caterers and restaurants across the U.S.

ezCater is hiring!

We’re always looking for highly skilled full stack and iOS engineers to help execute our technology goals while riding this rocket ship of growth. Our people are terrifically talented straight-shooters who love what they do. And everyone is generous and kind, too — we have a strict no jerk policy.

View ezCater Opportunities