Security Engineer

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

As a key member of Flo’s Security Architecture team, you will lead the design and operation of our US Healthcare security controls. You'll work directly with Product and Engineering teams to translate HIPAA and SOC 2 requirements into technical security controls across Flo's AWS multi-account environment - including EKS, Lambda, RDS, S3, VPC networking, IAM, and KMS.

You'll own the roadmap for HIPAA compliance and SOC 2 Type II certification, working closely with external auditors and professional services partners, and partnering with Engineering and Legal to build a secure, compliant platform for millions of users.

Annual Salary Range (ranges may vary based on skills and experience)

£100,000—£130,000 GBP

• 7+ years in security, compliance, or risk management (3+ in a leadership capacity), with a Bachelor's degree in a related field or equivalent experience.
• Deep expertise in SOC 2 within the AWS environment (familiarity with HIPAA frameworks would be considered a big plus).
• Familiarity with PHI handling, GRC and compliance automation platforms, and exposure to enterprise architecture frameworks such as TOGAF.
• Strong ability to manage multiple concurrent audit and certification workstreams.
• Excellent written and verbal communication, with the ability to translate complex compliance requirements into clear actions for engineering and business teams.
• CISA, CISM, or CISSP certifications
• Experience with NIST 800-53, Cloud Security Alliance (CSA), and Center for Internet Security (CIS) frameworks
• Experience in healthcare or another regulated industry; HITRUST experience a plus
• Experience building compliance roadmaps in early-stage startups
• Exposure to containerization (Docker/Kubernetes), serverless, and big data platforms
• Exposure to DevSecOps and sprint-based Agile development
• Vendor management experience

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.

We support impact with meaningful reward. Here’s what that looks like: