Staff Backend Engineer (Hiring Day - March 6)
Flohealth
Posted: February 23, 2026
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Quick Summary
We're looking for a skilled Backend Engineer to join our team as a Staff Backend Engineer, with a focus on building a scalable and secure backend for our health and fitness app. The ideal candidate will have a strong background in backend development, experience with Node.js, and knowledge of AWS and database design. You'll be working closely with our engineering team to build the next generation of digital health, with a focus on privacy and user experience.
Required Skills
Job Description
500M+ downloads. 80M+ monthly users. A decade of building – and we’re still accelerating.
Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down.
With 7M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better.
The job
Join us on March 6 for a streamlined Backend Engineering hiring event where you could land a job offer in just a few hours. We're condensing our standard interview process into a couple of hours: you meet the team, showcase your abilities, and walk away with a job offer and EUR 5,000 welcome bonus!
Ready to join our team?
Our tech stack & approach:
• Server-side programming in Scala or Python
• Polyglot persistence (we take the database that matches a particular case)
• API-first approach; UI comes second
• Distributed scalable environment
• Continuous delivery
• Real-Life big data application
What we're looking for:
• 12+ years experience building distributed applications and services
• Deep understanding of high availability, performance, and security—and when to prioritize each
• Strong proficiency in Scala, Python, or similar backend languages (Java, .NET, Golang, etc.), plus DevOps, SQL, and NoSQL
• Agile mindset ability to pivot quickly when priorities shift
• Passion for designing and building APIs
Nice to have:
• Experience with stream processing and public cloud platforms
• Production experience with eventual consistency
• Track record with systems serving 1+ million daily active users
#LI-AJ1 #LI-H
Salary Range - gross per month (ranges may vary based on skills and experience)
€8.500—€11.000 EUR
How we work
We’re a mission-led, product-driven team. We move fast, stay focused and take ownership – from brief to build to impact. Debate is encouraged. Decisions are shared. We care about craft, ship with purpose, and always raise the bar.
You’ll be working with people who take their work seriously, not themselves. It takes commitment, resilience, and the drive to keep going when things get tough. Because better health outcomes are worth it.
What you'll get
We support impact with meaningful reward. Here’s what that looks like:
• Competitive salary and annual reviews
• Opportunity to participate in Flo’s performance incentive scheme
• Paid holiday, sick leave, and female health leave
• Enhanced parental leave and pay for maternity, paternity, same-sex and adoptive parents
• Accelerated professional growth through world-changing work and learning support
• In-person collaboration and work in a hybrid model, with 3 days per week spent in the office
• 5-week fully paid sabbatical at 5-year Floversary
• Flo Premium for friends & family, plus more health, pension and wellbeing perks
Diversity, equity and inclusion
Our strength is in our differences. At Flo, hiring is based on merit, skill and what you bring to the role – nothing else. We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities. Read our privacy notice for job applicants.