Ads : (Menlo Park, Seattle, New York): Our mission is to make meaningful connections between people and businesses. We work towards this mission by investing in interfaces to make our platform easier to use for advertisers, by investing in targeting, infrastructure, and machine learning to provide a more personalized experience for people and better results for advertisers, and by investing in insights and measurement products that make it easier for advertisers to understand these results. As our platform has become more powerful, we have also started investing more and more in ad tech to power advertising off of Facebook and extend the reach of this mission beyond Facebook's products. Our success in this requires solving hard problems across every part of the technology stack so there are great opportunities to have a huge impact in ads regardless of your particular background.

Core Growth : (Menlo Park): Core Growth works on getting everyone in the world onto Facebook and coming back every day! We use a lot of tactics to work towards our long term goal of getting 7 billion users to use Facebook to connect. Our methodology to grow Facebook is to work on new initiatives, like multiple start-ups, in small teams we call "Taskforce". Each Taskforce does a lot of experiments and fails fast -> summarizes the successful experiments and builds consistent products -> builds infrastructure to scale the products to a billion users -> and makes the product smart. Current Taskforce groups are working on acquisition, account activation, notifications, friending, contacts, and emerging markets. Our work spans high performance infrastructure in C++, ranking using machine learning, and building products using Hack to JavaScript, Android and iOS.

Engagement : (Menlo Park, Seattle, New York): We focus on making it easier for people to share and discover content, engaging with what matters most to them. We're responsible for Friend Sharing, Groups, Media (Video, News, Public Figures), Feed Ads, and Facebook@Work, working to bring the best content in the world to you, regardless of whether it's coming from your friends, co-workers, the New York Times, or Tom Brady. There's plenty of work across the stack whether it be testing the boundaries with new standalone apps, scaling and improving performance for video (including VR), or machine learning and ranking to improve how we can serve the best and most meaningful content and ads. We have lots of exciting projects in the works, as we work to create new experiences and make it easier and more fun to connect with the people in your world.

Enterprise Engineering : (Menlo Park, New York): Enterprise Engineering builds applications and systems to scale Facebook -the company- and beyond. We reimagine and build products for sales, marketing, recruiting and many other groups inside Facebook, to provide insights, streamline business processes and enable intelligent, data-driven decisions. Enterprise is a booming area nowadays and thus it is not uncommon to see entire Silicon Valley startups valued at $1B+ also trying to solve the same problems our teams work on. Our projects are truly end-to-end: We have backend, frontend and full-stack engineers working on ML and NLP problems, implementing systems that process in realtime billions of rows of data and building beautiful web and mobile UIs for Facebook's business professionals. If you are interested in pushing the boundaries of new Facebook technologies while learning how Facebook -the company- operates, we need your help!

GCS : (Menlo Park, Seattle): Our mission is to build frameworks and tools to help products in FB to grow. On the Internationalization (i18n) team, we focus on removing the language barrier through crowdsourcing and automatic translation based on linguistic characters. On the Promotions team, we combine technical skill, growth strategy, and data-driven tactics to drive the widespread adoption of a product like Messenger or Groups. On the Data Science Infra team, we build the foundation of logging that tracks the usage of all Facebook products with high reliability and scalability. We have projects that span PHP backend and front-end, as well as native Android and iOS.

Within GCS in Menlo Park, we have an Android Strategy project (internal code name Oxygen). During your internship, you will be building a lightweight Android app streamline the Facebook Android app installation flow for Android users, including the addition of advanced features like download pausing/resuming, smart installation with respect to the network status, device capability, geographical preferences, etc.. You will also learn how to bring this new app installation experience to the next level in a data-driven way, including running product experiments and research.

Infrastructure : (Menlo Park, Seattle, New York): Infrastructure is an org encompassing many areas:
Core Data: Core Data's mission is to build and manage the storage and caching services that enable Facebook's product engineers to build the products that serve our users. We focus on the reliability and scalability of our services and aim to build APIs that make their access as easy as possible. The list of services Core Data owns includes MySQL, TAO, Dragon, Memcache, HBase, and ZippyDB. In addition to building and continually improving the efficiency, scalability, and reliability of these services, we also have teams dedicated to making our services easy to use. These teams include DBClient, Demand Control, Cache Client, EntQL, Node API, DevX, Social Hash, and RocksDB. Facebook continues to grow, and our product engineers are continually coming up with new ideas that push the limits of existing solutions. So, while we've already created many world-class services and products, our job is certainly not done. We have opportunities for developers interested in systems programming, internal tools development, API design and development, PHP/hack, C++, Python, etc., and with your help, we can build the solutions for the future.
Core Systems: Core Systems owns tools and services that enable Facebook to build, deploy, monitor, and maintain high performance services efficiently and reliably. In the world of Silicon Valley buzzwords, we would be Facebook's Cloud Services team. I hear it's very trendy! We work on a wide range of problems including configuration management, traffic and capacity management, disaster recovery, shard management, datacenter management tools, and power management. Teams within Core Systems include: Configerator, Laser, Async, CSI, DR, SMC, Zeus, Shard Manager, Service Router, Thrift, DC Tools and Evergreen. Our sister teams include Tupperware (a container system for running jobs) and Kernel ( Linux kernel used at FB, along with other 'system level' packages).
Developer Infra: Dev Infra's mission is to make Facebook engineers the most productive in the world. We build industry-leading infrastructure and tools that our engineers use every day. This covers a range of technologies from compilers, programming languages and source control, to company-facing products like search, tasks management and documentation systems. We build the core APIs and abstractions that Facebook's product engineers on to move fast for 1.6 billion people.
Working in Dev Infra means working across the entire stack of Facebook technology including Hack (PHP), JavaScript, Python, C++, Java and OCaml. We pretty much use all the languages at Facebook. And our extensive use of open source projects like MySQL, PHP, Python, Elasticsearch, Atom and more means we can move fast without reinventing the wheel.
Challenges within infrastructure involve scaling distributed systems. Really. For example, our continuous integration system has far more machines than most startups have in production! At Facebook's size, even simple problems like build and source control turn into huge distributed system and algorithmic work. Like making Mercurial scale to one of the biggest code repositories in the world and building HHVM, the PHP virtual machine that powers Facebook.
We also work extensively on products making sure communication and collaboration keep pace with company growth. Severals teams build everything from a Calendar tool that uses graph theory to optimally schedule meeting rooms, to React Native mobile versions of our internal tools for on-the-go, to an Atom-based next generation developer environment for Hack (PHP), Flow, React, C++ and more.
At the intersection of infrastructure and product work, Dev Infra also builds core frameworks used not only by Facebook, but throughout the rest of the industry. We ship frameworks like React, React Native, GraphQL, Relay, Draft.js, Hack, Flow, Infer, HHVM and dozens more (see https://github.com/facebook). We don't just consume open source; we produce the projects that help make engineers inside and outside of Facebook more productive.
Traffic and Networking: Facebook helps more than a billion people connect and share, and over the last decade our tools have played a critical part in changing how people around the world communicate with one another. At this scale and rate of growth, we face new challenges on a daily basis. As Facebook grows and evolves, new network workloads arise with increasingly demanding performance and reliability requirements. Our mission is to make it possible to support such workloads. At Facebook, we are constantly building the next generation systems that will scale while being efficient, reliable and easy to use.
From Layer 1-4, we write the software that helps build, deploy, control, and monitor the entire Facebook network, connecting all hundreds of thousands of servers in our fleet to each other and to the Internet. Traditional networking doesn’t work well at this scale, so we write a lot of software to make the network work. We work closely with Facebook’s datacenter, backbone, corporate, and operations teams and POPs. Increasingly, we provide network services to other infrastructure and engineering groups across Facebook.
From Layer 4-7, we build global and local load balancers, acceleration proxies, RPC frameworks, content delivery networks, and mobile networking stacks, plus the automation machinery that’s required to operate an internet scale edge network and handle all of Facebook’s DNS and HTTP traffic. We operate a large network of POPs around the world that we use to accelerate site traffic and cache CDN content. We glue these varied network services together in order to orchestrate the delivery of bits from our servers to your phone or desktop..
Storage/Warehouse and Data Tools: The team's mission is to deliver fast, reliable and easy to use infrastructure and user-facing tools for storing, managing, querying and analysis of data at Facebook scale. Data Infra enables all Facebook teams to make data-driven decisions and build data-intensive applications. Our Exabyte-scale Hadoop deployment is the largest in the world. Some core systems we own are: Hadoop File System, Cold Storage and WarmStorage for storing exabytes of data, Hive, Presto, Digraph, BumbleBee, Corona for processing large amounts of data, Metastore, Compendium that holds all metadata about millions of data sets Facebook teams define, Ergate, Copier Loader and Morse for ensuring fast data ingestion and data transfer across all Facebook DataCenters, Chronos and Dataswarm for making it simple for everyone to create a data workflow. At the end of this pipeline are our web tools. We create rich user interfaces that help other co-workers make sense of the massive amount of data we have with ease. We build tools for querying those data (Daiquery, Scuba), monitor systems (ODS, Alert Manager) and creating dashboards for visualizing data and organizing information (Argus, Unidash).
If you're interested in distributed systems, encryption, storage and compute efficiency, we have great opportunities in our teams. Lots of our systems are built in Java, Python, our web tools are in PHP/Hack/React/React Native and the new storage systems (ColdStorage and WarmStorage) are C++.


Instagram : (Menlo Park, New York): We're building Instagram to allow you to experience moments in your friends' lives through pictures as they happen. We imagine a world more connected through photos. We have one of the world's most used and best loved apps, and we'd like to build a team of world-class engineers to help us make our app even better.

Internet.org : (Menlo Park): Today, 4 billion of people in the world don't have access to the internet. Internet.org is leading the efforts to connect those people. We are a small start-up like engineering team building solutions that allow people to use basic internet services for free in a way that is sustainable for carriers. Our works cover a wide range of areas, including mobile web, android, machine learning and backend infrastructure. We are aiming to launch our products to 100 carriers in 2015 and we are looking for passionate and dedicated engineers to join us and enable the first internet experience for billions of people around the world.

Messenger : (Menlo Park, Seattle): Communication is a basic human need, and mobile messaging is changing people’s lives similarly to how telegraphs, telephones, and e-mail did for previous generations. The Messenger team’s mission is to reinvent everyday communication for 1B+ people. We need help on all layers of the stack from infrastructure to native mobile clients and web to build the world's most expressive, trusted and reliable instant communication medium for people to use with everyone – from privately with loved ones to engaging with businesses or interacting with their very own digital assistant – M. Messenger growth has been dramatic with more than 800 M people depending on it every month and VoIP and Video calls made on Messenger have now passed 10% of global VoIP minutes. It's a great time to join this fast moving innovative team.

News Feed / Interfaces : (Menlo Park, Seattle, New York): The News Feed team is responsible for the end-to-end experience of Facebook’s core News Feed product that is used by over 1 billion people a day. News Feed is designed to show you the most interesting and important stories about your friends and family as well as the world around you. Our teams span the entire stack. We build the backend infrastructure to process and store billions of events per day, continually test and incorporate new features for machine-learned ranking optimizations, create the core APIs and product infrastructure for querying stories, and design and craft the News Feed experience across the web, mobile web, iOS and Android. We’re looking for engineers from a variety of disciplines who are excited about building systems and product experiences to deliver a relevant, personalized set of News Feed stories that foster connections and conversations both online and in real life.

The Interfaces teams are responsible for defining the main Facebook experience on the web, iOS and Android. Each platform serves different needs and has different design and engineering principles. The Interfaces teams are composed of specialists on each platform that focus on the overall look and feel of our apps, our primary and secondary navigation systems, our tablet experience, our startup infrastructure, as well as specialized problems like Android 2G connectivity in emerging markets. We’re looking for engineers with deep platform knowledge of the web, mobile web, iOS or Android who can think through a holistic product experience or do a deep dive on a pressing technical challenge.

People, Places, and Things : (Menlo Park, Seattle, New York): Our mission is to leverage the rich knowledge graph of people, places, and things on Facebook to build compelling products that make people's lives better. We are organized into three main product groups:
Profile: The Profile team's mission is to make Facebook the best place for people to express and share their identity. The team is tasked with scaling out a reliable and efficient infrastructure for storing and querying across the historical record of all the actions our users have ever taken on the site - a stunningly large data set. In addition the team develops the user experiences and interfaces to let people manage their online identity, building easy to use, fun, and secure products to help people to share and connect, to keep their information accurate and up to date, and to get the information they want about the people around them.
Local: The mission of the Local team is to be the best place for finding, learning about, and connecting with places and local businesses. We do so by surfacing useful and engaging content about places in a context-optimized way as well as enable people to search for places around them. We help people tell richer stories by tagging their stories with their location and what they are doing. We also enable people to help others know more about places by enabling them to rate, write reviews, and add to and update information about places. We continue to grow our worldwide database of places and build new products that make use of it.
Events: The mission of Events Team is to help people spend time together in the real world. Making it easier to discover things to do and people to do it with, get together with friends nearby, celebrate a special occasion, or meet up for a shared interest/activity is one of our biggest opportunities to make the world more open and connected. The Events team focuses on creating tailored experience for these use cases, covering the stage of planning, coordinating, discovering and actually attending these get-togethers in person.


Platform : (Menlo Park, Seattle): The Platform team builds the products and APIs that allow external developers to build, grow, and monetize their apps utilizing many core Facebook services. Platform owns two large pieces of infrastructure used across the entire company: the Graph API and the payment processing system. Platform also owns a number of developer focused products including the mobile SDKs, Facebook Login, social plugins (e.g. the Like and Share buttons), the Games on Facebook platform, Audience Network, app install ads, and Analytics for Apps.

Protect and Care : (Menlo Park, Seattle): Our mission is to reduce bad experiences and make people feel cared for when problems arise. We protect people's access to their accounts; fight spammers and malware with large-scale distributed systems, data processing and machine learning; and engineer systems to make our code bases more secure. When people have negative experiences on Facebook, we build the products to support them, whether due to bugs, bad actors, or interpersonal issues. These products let people find help and let them tell us about the issues, and on top of them we build the data analysis, machine learning and rule engines handle them, and we build tools to make Facebook's enormous international operations workforce productive in helping people. We give people options for resolving their problems, applying state of the art research on abuse detection, compassion and empathy to systems and product design, and supporting features like reporting, untagging and blocking used by tens of millions of people every day. We optimize for people feeling secure, cared for, and satisfied. Our work spans high performance infrastructure in C++ and Haskell processing trillions of classifications per day through front end products on every platform, from Hack to JavaScript, Android and iOS.

Search : (Menlo Park, Seattle): Our mission is the allow people to find anyone in the world and to draw on the wisdom of over a billion people. When people want to understand who someone is or learn more about them, we want them to search on Facebook. When people want to understand something, we want them to use Facebook Search to see a feed of personally relevant stories and perspectives about the topic. This is a huge, multi-year bet that Facebook is making, and we need your help. Search is a ‘full stack’ team ranging from its own infra through to product pixels on web and mobile. We solve problems in machine learning and ranking, measurement, speed, NLP, and good old high quality software engineering. We’re excited to have you working on Search. Many of our previous interns have contributed great projects to the team and we’re looking forward to yours!

Social Good + Goodwill : (Menlo Park): Our mission is to build product experiences that give back to the world, and in the process improve Facebook's relationship with the people we serve. There are three teams in SGG: Social Good, Goodwill, and Privacy. On Social Good, we are focused on helping people in times of need through products like the Crisis Center, Donations, Amber Alerts, and more. On Goodwill, we are focused on helping people celebrate the important moments in their life, such as birthdays, anniversaries, and friendships. On Privacy, we are focused on helping people feel in control of their information and understand Facebook privacy so that they can use it to share with the right audience. We have lots of exciting projects on both web and mobile and are looking for engineers who are passionate about making people happy.