---
title: 'Security Architect at Flo Health'
canonical: 'https://feeny.ai/job/security-architect-flo-health-vilnius-9fhzexd3sr54'
type: 'job'
last_seen: '2026-11-10'
---

# Security Architect at Flo Health

- **Company:** Flo Health
- **Location:** Vilnius, Lithuania
- **Compensation:** €8k–€10k
- **Posted:** 2026-11-06
- **Last confirmed live:** 2026-11-10
- **Apply:** https://job-boards.greenhouse.io/flohealth/jobs/8012871003

## 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

Millions of people trust Flo with their most personal health data. As our Security Architect, you’ll make sure we deserve that trust. This is a hands-on individual contributor role. You’ll work side by side with engineering, product and platform teams to shape secure architectures and build the guardrails that let both humans and AI coding agents ship quickly and safely. The role combines security architecture, product and application security engineering and security risk expertise: you will set secure patterns and standards, lead threat modelling and design reviews, embed security into the SDLC and CI/CD, and translate security risk into clear, pragmatic decisions.

## What you’ll do

- Shape secure architecture from day one. Partner with teams early in design, lead security design reviews for new services and major changes, and record key decisions and risk trade-offs.
- Build security harnesses for human and AI-agent development. Design guardrails, sandboxing, least-privilege access for agents and tools, secrets handling, policy-as-code and automated checks that run inside developer and agent workflows.
- Lead on AI and agentic security. Define secure patterns for LLM integrations, MCP servers and tool use, and tackle risks like prompt injection, data leakage, excessive agency and supply-chain compromise.
- Create paved roads. Publish reusable patterns, reference architectures and standards that teams adopt because they’re the easiest option.
- Scale threat modelling. Build tools and skills that let engineers run threat models themselves, and carry out internal security assessments.
- Remove whole classes of vulnerabilities. Automate vulnerability triage and investigation, find systemic root causes, and feed the fixes back into patterns and guardrails.
- Turn risk into clear decisions. Explain security risk in pragmatic terms so the business can prioritise based on risk and value.
- Advise and enable. Be a trusted partner to engineering, product and leadership, coach engineers, and help evaluate third-party and AI tools so they can be adopted securely. Support ISO 27001/27701 so that controls are built into how we engineer, not bolted on afterwards.

## What you’ll bring

- 7+ years in security engineering, application/product security or security architecture, including hands-on work securing cloud-native systems
- Deep knowledge of Secure SDLC: threat modelling, security testing, app security review and CI/CD security
- Hands-on experience with AWS and Cloudflare (or equivalents) and Terraform or similar IaC
- A strong grasp of the OWASP Top 10 and the ability to assess exploitability and impact
- Solid coding skills (e.g. Python, Go, Scala) and experience building security tooling or automation
- Practical understanding of the risks in AI-assisted and agentic development and LLM applications (e.g. OWASP Top 10 for LLMs)
- Experience with security risk analysis and risk management methods
- The ability to explain trade-offs clearly to engineers and senior stakeholders, and to win people over

## Nice to have

- Experience building guardrails, sandboxes or policy-as-code (e.g. OPA) for developer platforms or AI coding agents
- iOS or Android security experience
- Experience with ISO 27001, ISO 27701 or SOC 2 audits
- A background in health tech, femtech or another regulated, privacy-sensitive industry
- Certifications or degrees such as CISSP, CCSP, OSCP or an MSc in Information Security

## Why Flo

You’ll protect data that matters deeply to millions of people. You’ll also help set the standard for how a company adopts agentic engineering safely, and you’ll have real ownership: you design and build the first version, then hand it off to the teams who will run it. Salary Range - gross per month (ranges may vary based on skills and experience) €8.000—€10.000 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](https://flo.health/privacy-policy-for-job-applicants).

## About Flo Health

## Company Overview
- **One-liner**: Flo is a women’s hormonal health app that provides personalized, data-driven, and science-backed cycle, ovulation, fertility, and pregnancy tracking from first period to perimenopause.
- **Entity Type**: Private (Series C, raised $276.4M in total funding; reached unicorn status in July 2024)  
  [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
- **Headquarters**: London, United Kingdom (additional offices in Vilnius, San Francisco, and Amsterdam)  
  [flo.health](https://flo.health/about-flo) | [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
- **Founded**: 2015  
  [flo.health](https://flo.health/about-flo)
- **Founders**: Not publicly available

## Core Business
- **Primary industry**: Women’s health / digital health / consumer health technology
- **Target customers**: B2C – women and people who menstruate across all life stages (period, fertility, pregnancy, perimenopause)
- **Mission**: “Female health has been underfunded and undervalued for way too long. … [We] ensure you can trust Flo by verifying everything we share with our team of 120+ doctors and medical experts.”  
  [flo.health](https://flo.health/about-flo)

## Products & Services
- **[Flo App]**: All-in-one mobile application for cycle and symptom tracking, ovulation and fertility guidance, pregnancy and postpartum support, tailored health insights, and access to private health communities. Includes the **Flo Assistant** – an AI-powered feature for personalized advice.  
  [flo.health](https://flo.health/about-flo)
- **[Virtual Clinics]**: A new service area (under development) aimed at offering clinical support, as indicated by job postings for a Senior Product Designer (Virtual Clinics).  
  [Greenhouse](http://job-boards.greenhouse.io/flohealth)

## Market Standing
- **Valuation/Market Cap**: Unicorn status (valuation >$1B) achieved with its Series C round in July 2024; exact valuation not disclosed.  
  [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
- **Key Metric**:
  - Total Funding: $276.4M (9 rounds)  
    [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
  - Annual Revenue: Not publicly available (private company)
  - Users: 420 million downloads, 10 million monthly active users, 85% would recommend to a friend  
    [flo.health](https://flo.health/about-flo)
- **Notable Investors/Partners**: Not explicitly listed in search results; public partnerships include **Mayo Clinic** (studying period symptoms across 800,000 cycles) and **United Nations Population Fund** (global female health education).  
  [flo.health](https://flo.health/about-flo)
- **Growth Signals**:
  - First European female health unicorn  
    [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
  - Headcount ~450–550 (YoY growth slightly negative per LinkedIn, but actively hiring 41+ roles across engineering, marketing, product, design)  
    [uk.linkedin.com](https://uk.linkedin.com/company/flohealth) | [Greenhouse](http://job-boards.greenhouse.io/flohealth)
  - Expanding into Virtual Clinics and perimenopause content  
    [Greenhouse](http://job-boards.greenhouse.io/flohealth)
  - Available in 22 languages globally  
    [flo.health](https://flo.health/about-flo)

## Competitive Advantages
- **Medical credibility**: Team of 120+ doctors, scientists, and medical experts review all content; #1 OB-GYN recommended period tracker.  
  [flo.health](https://flo.health/about-flo)
- **AI & machine learning**: Integrated predictive algorithms for period and ovulation accuracy.  
  [flo.health](https://flo.health/about-flo)
- **Privacy-first**: Anonymous Mode allows users to track health without personal identifiers.  
  [uk.linkedin.com](https://uk.linkedin.com/company/flohealth)
- **Large, engaged community**: 420M downloads and strong word-of-mouth (85% would recommend).  
  [flo.health](https://flo.health/about-flo)

## Strategic Focus
- Expand into new health verticals (e.g., perimenopause, virtual clinics) and deepen AI personalization.
- Continue global growth (22 languages, partnerships with UNFPA and Mayo Clinic).
- Strengthen medical credibility through proprietary research and expert review.
- Scale the Pass It On Project to provide free health information to 1 billion women in underserved communities.  
  [flo.health](https://flo.health/about-flo) | [flo.health](https://flo.health/)

## Why Work Here
- **Total rewards**: Employee Share Ownership Plan (ESOP) for all employees, competitive holiday (25 days + public holidays), 30 days fully paid sick leave, 6 months fully paid maternity leave + $5,000 return bonus, 1 month fully paid paternity leave.  
  [flo.health](https://flo.health/careers)
- **Flexible work**: Hybrid model (2 days/week in office); Workation policy (work from anywhere up to 2 months/year).  
  [flo.health](https://flo.health/careers)
- **Growth & learning**: Dedicated Learning & Development budget, personal development plans, career progression from within.  
  [flo.health](https://flo.health/careers)
- **Culture**: “Servant leadership” – managers ask “What can I do for you?”; high bar for talent; mission-driven environment focused on impact.  
  [flo.health](https://flo.health/careers)
- **Locations**: Major hubs in London and Vilnius, with smaller offices in San Francisco and Amsterdam.  
  [flo.health](https://flo.health/careers)

## Sources
1. [flo.health/careers](https://flo.health/careers)
2. [flo.health/about-flo](https://flo.health/about-flo)
3. [Greenhouse job board](http://job-boards.greenhouse.io/flohealth)
4. [flo.health homepage](https://flo.health/)
5. [LinkedIn company page](https://uk.linkedin.com/company/flohealth)

## Other roles at Flo Health

- [Senior Medical Advisor](https://feeny.ai/job/senior-medical-advisor-flo-health-london-eq5dh40ay47k) — London, United Kingdom
- [Security Architect](https://feeny.ai/job/security-architect-flo-health-london-vdgqn8ef9q7d) — London, United Kingdom
- [Freelance Performance Copywriter (3 months, full time)](https://feeny.ai/job/freelance-performance-copywriter-3-months-full-time-flo-health-united-kingdom-05d3w7a0we9v) — United Kingdom
- [Principal Infrastructure Engineer](https://feeny.ai/job/principal-infrastructure-engineer-flo-health-london-82e44t4mkdhs) — London, United Kingdom
- [Senior/Staff Product Designer (Virtual Clinics)](https://feeny.ai/job/senior-staff-product-designer-virtual-clinics-flo-health-london-3q61pbpkk86v) — London, United Kingdom
- [Senior Growth Product Manager - Monetisation](https://feeny.ai/job/senior-growth-product-manager-monetisation-flo-health-vilnius-0b9xh5qksm3c) — Vilnius, Lithuania
- [Senior Growth Product Manager – Monetisation](https://feeny.ai/job/senior-growth-product-manager-monetisation-flo-health-london-zb0r7yjqdgr1) — London, United Kingdom
- [Senior Product Manager - Web Onboarding](https://feeny.ai/job/senior-product-manager-web-onboarding-flo-health-vilnius-rpsbxgstvw4j) — Vilnius, Lithuania
- [Senior Product Manager - Web Onboarding](https://feeny.ai/job/senior-product-manager-web-onboarding-flo-health-london-rmw7xy21jge9) — London, United Kingdom
- [Senior Machine Learning Engineer](https://feeny.ai/job/senior-machine-learning-engineer-flo-health-london-49k4c7rph7ph) — London, United Kingdom