Scaling Beyond MySQL

June 07, 2017

Wealthfront is growing fast, and the quantity of data we collect is growing faster. With the launch of Path, we’ve seen a large increase in the number of non-Wealthfront accounts our customers have linked over time (see below). We have plans to increase the breadth of automated financial advice we provide for our clients, so… 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

Lessons Learned when Scaling our Data Analytics Platform

August 20, 2014

Over the past year, we’ve gone from a single Java server running all analytics to a multi-node data pipeline. Along the way, we’ve refined our metrics for all parts of the business: from web and mobile analytics, to investment research, to trading and operations. We build metrics dashboards for everything we do, empowering us to… Read more

Worlds Collide

November 08, 2013

Before I ever became interested in finance or big data, I was working on software for real-time, concurrent embedded systems. I was the main contributor for the Soft Walls project, a 9/11-inspired project where we were designing aircraft control algorithms to prevent pilots from entering no-fly zones. I was later a contributor to the Ptolemy… Read more

Testing Cascading applications

October 15, 2013

This post explores how we apply our test-driven-development philosophy to analytics problems. In particular, it shows how use test-driven development with Cascading, which we’ve recently started using to drive analytics at Wealthfront. Cascading let’s us specify complicated analytics pipelines in Java. It works well for problems that would normally require multiple MapReduce jobs to get a… Read more

The first week at Wealthfront

May 17, 2013

I just finished my first week at Wealthfront. In my first three hours I fixed a small production bug. By the end of the week, I had shipped my first feature: the backend code to serve up the commit statistics feeding the visualization at our new engineering page. Moving this quick was empowering, and it… Read more