Backend Engineer at Flo Health

With over 500 million downloads and 80 million monthly active users, we are the world's leading health and fitness app. Our mission is to build a better future for female health, and we have spent the last decade earning trust at scale. Backed by a 200 million USD investment, we reached a 1 billion USD valuation in 2024, and we are continuing to push the boundaries of digital health. We are currently looking for a Senior Backend Engineer to join our AI Platform team and help us build the backbone of our personalization efforts.

What you'll be doing

• You will take ownership of the User Profile service, a high-scale system that powers AI and experimentation for our massive global user base.
• You will lead the development of User Profile 2.0, creating advanced data representations and integrating them with machine learning feature stores.
• You will foster an inner-source ecosystem by establishing architectural standards and quality gates that allow other product teams to contribute to the platform safely.

What you'll bring

To succeed in this role, you should have at least 7 years of professional experience building distributed backend systems. We are looking for someone who is fluent in Scala, Java, or Python, with a willingness to focus primarily on Scala. You should be comfortable working with AWS services, specifically DynamoDB, EKS, and serverless architectures. A deep understanding of SQL and NoSQL databases is essential, as is experience designing high-throughput, low-latency APIs. Since you will be working in a hybrid capacity across our offices in Lithuania and the United Kingdom, strong communication skills in English are vital for collaborating with our cross-functional teams.

What you'll get

We offer a monthly gross salary range of €8,000 to €12,000 EUR, depending on your specific skills and experience. In addition to your compensation, you will enjoy a variety of benefits designed to support your professional and personal well-being:

• A flexible hybrid work model that balances office collaboration with remote flexibility.
• Comprehensive professional development opportunities to help you grow your career.
• Access to various wellness programs to support your physical and mental health.
• Generous paid time off, including holiday, sick leave, and a fully paid 5-week sabbatical after five years with the company.