Senior Infrastructure Engineer
Flo HealthKandidatuoti400M+ downloads. 75M+ monthly users. A decade of building – and we’re still accelerating.
Flo is the world’s #1 health app 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 6M 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
We’re not chasing product–market fit. We’ve found it. Flo is used by 1 in 4 women aged 18-44 in the US. Last month alone, 8.6M new installs and a 2.8M user jump. That kind of scale doesn’t just happen. It’s engineered. That’s where you come in.
We’re hiring a Senior Infrastructure Engineer to join Velocity, our internal platform team. Velocity exists to make engineering at Flo faster, safer, and more innovative. Your mission? Build the systems that empower our devs to ship like pros without breaking things.
What Velocity does:
- Automates everything worth automating
- Hides complexity behind clean, intuitive tooling
- Bakes in security and standards so teams don’t have to think twice
What you’ll help build:
- Distributed systems that handle millions of real-time health interactions
- Privacy-first features like Anonymous Mode (named in TIME’s Best Inventions)
- Self-service tools that give teams speed without chaos
- A stack that scales - fast, available, and secure, always
You’ll thrive here if you:
- Have 6+ years in Infra, SRE, DevOps or similar roles in high-scale environments
- Know AWS, Kubernetes, and CI/CD like the back of your hand
- Understand observability (metrics, logs, tracing) and why it matters
- Can debug at the Linux kernel level and aren’t scared of a flame graph
- Have experience with multiple languages (Python, Bash, Scala, Go, etc.)
- Communicate, document well, and collaborate like a pro
Bonus points if you’ve:
- Hardened infra with security best practices
- Shipped at scale in a consumer tech environment
What’s in it for you:
- Own our core infrastructure stack (Terraform, Kubernetes, Sentry, EKS, Ansible)
- Shape and scale infra-as-code with autonomy
- Equip engineers with best-in-class observability so issues get fixed before they’re felt
- Play a lead role in reliability and resilience through on-call and business continuity planning
- Take security seriously - and help raise the bar across the company
You're not just keeping the lights on. You're building the grid. If that sounds like your kind of challenge, let's talk.
#LI-Hybrid #LI-L#LI-Hybrid #LI-L
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
- Flexible office + home working, up to 2 months a year working abroad
- 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.