3 Ways to Integrate Third-Party Metrics into Your Data Platform

November 24, 2015

From both a company and engineering standpoint, Wealthfront values making decisions backed by quantitative methods. As noted in our previous blog post, Statistics is Eating the World, the key to enabling decisions backed by data is to build a platform that is automated and can scale across all aspects of our business. One of the… Read more

How We Avoid A/B Testing Errors with Shrinkage

October 29, 2015

At Wealthfront, we use A/B tests to make our services more effective, informative, and convenient. Each A/B test consists of two or more variants of a feature or design, which we expose to visitors at random until we have have enough data to infer which is better. In a previous post, we explained why we… Read more

Testing JavaScript Modules

October 13, 2015

In our previous post we outlined benefits of writing JavaScript in modules. One benefit we didn’t mention was how much more testable JavaScript modules are. In your test file you can require the module under test and let the require system import any dependencies. The goal of this post is to outline some of the… Read more

Advice for the Transition from College to Industry

September 29, 2015

The transition from college to industry came with quite a few surprises and lessons. Reflecting back on own my experience, I want to share a few insights I’ve gained. Additionally I want to share habits I formed during my undergraduate that transitioned well, as well as those that required significant changes in order to assimilate… Read more

Why We Use Bayesian Inference

September 01, 2015

At Wealthfront, we’re constantly experimenting with our products to make them better. Like other internet companies, we use a metrics-driven approach to test product changes. Each change is validated with an A/B test (hypothesis test), where we evaluate the change on a subset of clients by measuring its impact on some business metric, like the… Read more

Unit Testing for Sass with Sassaby

July 09, 2015

At Wealthfront we use Sass to write all of our CSS stylesheets. Sass is a powerful CSS pre-processor that allows you to leverage features common in programming languages, but are absent from native CSS. Using Sass variables, conditionals, loops, and functions, you can write extensible CSS that is easier to maintain across a large front-end… Read more