Software Engineer, App Platform

Fitbit, US - Boston, US - San Francisco

Stay motivated and improve your health by tracking your activity, exercise, food, weight and sleep

At Fitbit, our mission is to help people lead healthier, more active lives by empowering them with data, inspiration and guidance to reach their goals.

We started our journey in 2007—as a team of two with one big idea. Since then, we’ve grown to over 1,500 employees, sold over 60mm devices, and built a health and fitness community across the globe.  In fact, the Fitbit Community has taken enough steps to walk from the Sun to Pluto!  Offering award-winning products, a top-rated mobile app and an easy-to-use online dashboard, Fitbit provides personalized experiences that help our users reach their goals. With a reenergized focus on innovative devices, interactive experiences, and enterprise health we are transforming the way consumers and businesses see health & fitness.

From your first steps as a Fitbitter, you will be at the forefront of developing new products. Our culture combines the spirit of startup with the perks of being public. We offer a competitive benefits package and amazing perks like unlimited snacks, Friday happy hours, onsite workout classes, and a strong focus on a healthy work-life balance. As part of our team, you’ll have the opportunity to grow your career, contribute your ideas to life-changing products and services, and—above all—have fun doing it.

Fitbit’s HQ campus is located in the heart of San Francisco with office locations in Boston, San Diego and around the world. Think you’ve found your fit?

The role:

The App Platform team is responsible for all core infrastructure used across the Fitbit services. Our goal is to allow the feature teams to do what they do best, which is build features. We will provide the components, frameworks, libraries and services for logging, RPCs, message queues, metrics gathering, caching and many more.

We spend our time thinking about scalability, reliability, security and performance. We solve problems that we know about now as well as problems we foresee months and years down the road.

Currently we leverage a lot of open source technology like Finagle, Thrift, Kafka, Elasticsearch, Memcached among others. However, we also believe that Fitbit has a lot of unique problems that require us to think creatively outside of what the open source world can provide.

What You’ll Work On

As a member of the Fitbit App Platform team you get to play a few different roles:

Architect: We are the ones that know how our large system should fit together.

Developer: We write lots of code. Some is purely for prototyping and what passes the prototyping phase is made ready for production and used by nearly all server teams.

Consultant: We work closely with all the server teams to understand their needs and lend assistance with the infrastructure we have built.

Leader: We need to be vocal about our experiences to internal teams as well as the outside world through blog posts, presentations and open source contributions.


  • 5+ years of experience as a software engineer
  • Strong Java knowledge
  • Experience working with high traffic, scalable web applications
  • Solid understanding of data structures, algorithms and framework internals
  • Ability to speak and write clearly and concisely
  • Ability to think creatively about solutions with a focus on the long term stability of our system.


  • Experience with SOA
  • Experience with at least one relational database (e.g. MySQL) and one NoSQL database (e.g. Cassandra)
  • Familiarity with asynchronous messaging systems, such as Kafka and ActiveMQ
  • DevOps experience

 We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

About Fitbit

We're a passionate team dedicated to health and fitness who are building products that help transform people's lives. While health can be serious business, we feel it doesn't have to be. We believe you're more likely to reach your goals if you're encouraged to have fun, smile, and feel empowered along the way.

Want to learn more about Fitbit? Visit Fitbit's website.