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Sr. Backend Developer

Lifesum gives people personalized navigation for health and lifestyle improvement. By tapping in to mobile sensor technology and combining it with passion for design and applied psychology, we try to create delightful user experience that improves peoples lives.

Job Description

Our backend team is small, but experienced and extraordinary. Responsible for the APIs that the mobile clients consume, the team constantly strive to write well-tested code that is scalable to meet the needs of our growing user base. All of this to ultimately be the best health app on the global market that helps people live healthier and happier lives! We are now looking for a Senior Platform Engineer to join our backend team. 

Our stack

We are migrating towards a service based architecture, breaking up our Django monolith into smaller pieces to make us more flexible and maintainable. We are cloud hosted on AWS, running our Python and Go apps in containers against Amazon provided services.

Our services are primarily APIs which are consumed by mobile clients, asynchronous tasks running longer operations, and occasionally web-facing UIs. Our philosophy is to choose the right tool for every task, giving us flexibility in the way we work.

Your responsibilities will be to work in cross-functional teams, to help design and deliver new user experiences. We want you to help and mentor others when needed and technically contribute to the overall design of our infrastructure. You will be responsible for developing and maintaining services that drive our mobile and web clients, also with connecting with our partners by integrating 3rd party APIs. 

What we expect from you

  • Open, honest and collaborative co-worker
  • 3+ years of experience and confidence in architecture
  • Fluent in Python, Go or a related language
  • A passion for lean, clean and maintainable code
  • A high level of curiosity
  • Have a desire to grow and to share insights with others
  • Fluent in English (written and verbal) 

Helpful knowledge would be an understanding of network protocols and experience with production environments running on Linux. Other helpful experiences would be working with docker, AWS, terraform or dev ops generally, but also with databases, relational and/or document based. 

What you can expect from us

There’s a few things about Lifesum that you might not know:

  • Passion. All companies might claim this, but Lifesummers show real passion and dedication to their work. Our blame-free culture encourages experimentation, which helps us all learn and grow.
  • Trust. We built our culture upon trust, which means more freedom to suggest, champion and lead. This also means far greater personal responsibility - and we wouldn’t have it any other way. It works because we trust each other.
  • Diversity. Including more than 20 nationalities, we enjoy a rich mix of cultures, world views and working styles - this is more than your average tech gig: these different perspectives make sure we’re solving the right problems.
  • Balance. We want you to be happy - so go ahead! Talk food and health, exercise with others, live life and most of all, laugh! Learn what works for you and use that to help everyone.

If you think this sounds exciting, we'd love to hear from you and get to know you. Send us your resume right away and please tell us why you are interested in this particular position and why Lifesum is the place you want to be your next workplace. 

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of sex, transgender identity or expression, ethnicity, religion or other belief, disability, sexual orientation, or age.

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Dynamic, inspiring, always learning

Lifesum is a hub of energy and excitement, with new developments and updates everyday as we evolve alongside the tech industry. Where there's less hierarchy, there's more autonomy & collaboration.


Stockholm location, global culture

We’re a team of some Swedes, some German, some Icelandic, some Aussies, some Brazilians, some Americans…the list goes on. We come from over 20 different nationalities, but most importantly we’re a team. We work collaboratively; always focused, having fun, and remembering that we need each other in order to create something of real value.

To date the app has over 30 million registered users with new people joining daily. It’s important to us that as we grow - both as a company and as a team - our culture and office remains a place of collaboration, fun, creativity and great work.

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