Johnson was a director of engineering at FB for six years, responsible for scaling the site from millions to billions of users.
Abraham invented a specialized database called SCUBA while at Facebook. It's a visual analytics tool adopted by over half of the company’s employees that lets Facebook see how Facebook's technology is performing in real time.
Together with Johnson's wife Ann, they founded Interana, a self-service data analytics tool. Customers include Sony, Tinder, and Jive.
Facebook alum: Philip Liu
Funding: $28.5 million, total
Liu was a software architect at Facebook where he developed software that helped Facebook setup and monitor IT systems.
He went on to co-found SignalFX that detects patterns about the health of the IT infrastructure. Yelp and Tapjoy are customers.
Facebook alum: Avinash Lakshman
Funding: $30.5 million, total
While an engineer at Facebook, Lakshman created Apache Cassandra, a popular "big data" database originally built to handle Facebook’s Inbox Search feature. Facebook gave Cassandra away as a free and open-source software project and its now a very popular databased used by oodles of companies.
Lakshman went on to found Hedvig, which offers software that makes all of a company's computer storage system act is if it was just one really big, really fast hard disk. Hedvig also runs on ordinary, low-cost x86-based servers, similar to Cassandra.
Thusoo and Sen Sarma built and led Facebook’s data infrastructure team, one of the largest data processing and analytics platforms in the world.
They went on to found Qubole in 2011, a big-data-as-a-service firm that manages every aspect of analyzing data in the cloud. Customers include Pinterest, Quora, and Answers.com.
Facebook-led Open Compute Project alum: Cole Crawford
The Open Compute Project (OCP) was started by Facebook to let anyone help design data center hardware, sharing the designs for servers, storage, network for free, a concept known as "open source hardware." Crawford was OCP's first executive director.
Vapor IO makes open-source hardware and software for building and managing data centers inspired by, and aligned with the designs created by the OCP community.
Facebook alum: Bret Taylor
This startup, founded by former Facebook CTO Bret Taylor, is a little different than the rest. Instead of concentrating on infrastructure, Quip took what Taylor learned about how employees collaborate at Facebook.
The startup is making a set of tools for workers to be more productive on their mobile phones. It started with a collaborative mobile word processor and later added a spreadsheet. Most recently, Quip expanded to the desktop with a native client there, taking on Google for Work and Microsoft Office a little more directly.