About Us

lark™ | Work With Us


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We're on a mission to improve lives

At lark, we're changing the game in mobile health and wellness technology. We design wearable sensors and real-time, empathetic coaching that make people healthier and happier. Our mission is to improve lives by combining cutting-edge technology, behavior change science, and human-centered design.

We're a fun, close-knit bunch of Stanford and MIT nerds. We like great design, tough engineering challenges, and moving quickly. We strongly believe in work-life balance, and we thrive in a supportive, creative culture where the best ideas win.

We're always looking for passionate, exceptional people to join our team in Palo Alto, California. If you're excited to help us tackle the biggest, baddest challenges in healthtech, please drop us a line at jobs@lark.com.

Data Scientist / Machine Learning Engineer

We’re looking for an engineer to join our data team. Help us interpret raw sensor data and turn it into best-in-class personalized activity coaching. You’ll leverage all of our data to increase the product’s intelligence and delight our users. If you love data and applying advanced machine learning techniques directly to the product, please get in touch.


  • You’re excited about using sensor data to extract meaningful behavioral insights about human beings.
  • You’ve developed efficient systems that can cluster/classify a large data set in real-time
  • You like analytics and can find insights in large sets of user data
  • You love shipping code, and are excited to join a fast-moving startup


  • Experience with SciKitLearn, PCA, and decision trees

If you're interested, please send us your resume and share your GitHub (or other public code sample). 


Mobile UI/UX Designer

Excellent interaction design is core to lark's mission and is the driving force behind our products. Help us create beautiful, engaging, and empathetic products that will coach our users to better health.

The Role:

You'll work closely with our engineers and health experts to create beautiful, engaging and empathetic products that will coach users to be fit and happy. Our mission is to improve lives by combining cutting-edge technology, behavior change science, and human centered design, and you'll be the core to this ambitious goal. 


  • Outstanding portfolio and experience with rapid prototyping
  • 3+ years experience designing user experience on web, iOS, and Android
  • Expert knowledge of industry tools (Photoshop, Illustrator, Balsamiq, etc.)
  • Degree in interaction design, human computer interaction, industrial design, or equivalent preferred


  • You've got HTML, CSS, and JavaScript experience


Senior Backend Engineer

We're solving tough challenges in performance and scalability. We've got a huge amount of health data, and even bigger plans for it. You’ll lead the charge to improve the lives of our users by architecting efficient, scalable systems that interpret the world’s sensor data and improves lives.


  • You've held previous roles as a senior engineering leader at a startup or two
  • You have deep understanding and experience with both SQL and NoSQL technologies
  • You've been a lead architect before, and you tackled challenging problems by designing a custom, highly-scalable solution
  • You've grown systems to handle hundreds of thousands and users and over 1000 queries per second in an efficient and cost-effective way
  • You’re eager to build a game-changing product in the wearables space


  • You’ve done the above for the backend of a consumer, mobile application

Software  Engineer

We’re looking for a full-stack engineer to come join our software team. You’ll help build the engine that is interpreting the world’s health sensor data and empowering people to live fitter and happier lives.

This is a role that involves working in many different environments/languages. You should be excited by the opportunity to learn a lot in a short period, or to test your skills across the stack if you’re already a master of everything. :)


  • You’re excited to solve hairy problems and design systems that have never been built before
  • You have experience working with databases, ideally both SQL and NoSQL technologies
  • You’re comfortable in both frontend and backend environments
  • You love shipping code, and are excited to join a fast-moving startup
  • Minimum 1-2 years experience building products through code


  • You have machine learning experience
  • You’ve released a product (personal projects are fine!)


Android Developer

Join our engineering team and lead the development of Android applications that will coach and inspire people to improve their lives.


  • 2+ years experience in Android development and expertise with Android 4.x
  • Experience with HTML5 and Bluetooth development is a plus
  • Startup experience and a desire to move quickly
  • Minimum of Bachelor's degree in Computer Science (or equivalent)