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Flo Health Inc. Tech Stack

Period and ovulation tracking app for 400M+ women globally

Technology, Information and Internet London 501–1,000 employees Founded 2015 Privately Held

Flo is a mobile-first health app serving 400 million women with cycle tracking, ovulation prediction, and pregnancy support. The tech stack—Kotlin, Swift, Java, Scala across iOS/Android, plus Python and cloud infrastructure on AWS/GCP—reflects a mature native mobile engineering operation. Current hiring skews heavily toward marketing (22 roles) and growth infrastructure, while active projects focus on paid user acquisition, video creative optimization, and a monetization roadmap. Pain points center on scaling acquisition efficiency and improving engagement metrics, suggesting the company is in a revenue-growth phase following their Series C.

Tech Stack 77 technologies

Core StackScala Java Kotlin Swift Looker Tableau Python AWS NetSuite Google Ads Figma Adobe Illustrator After Effects React TypeScript Next.js Jest Playwright Contentful Jira Confluence Objective-C SQL GCP Facebook Ads Manager TikTok Ads Snapchat Excel Google Sheets Photoshop+47 more

What Flo Health Inc. Is Building

◆Challenges

Scaling user acquisition
Improving user comprehension and engagement
Improving video creative performance
Hipaa compliance roadmap
Reducing operational overhead
Privacy compliance
Vendor management
Campaign demand spikes
Optimising paywalls and pricing
Strengthening subscription value proposition

▲Active Projects

App user acquisition campaigns
Scalable frameworks and systems for growth
Paid video campaigns across social platforms
Privacy-first ai-powered health tools
Monetisation roadmap
Design features and experiments for engagement and retention
Soc2 certification
Compliance automation platform
Creative brief development
Boost motion design capacity

Hiring Activity

Steady70 roles · 25 in 30d

Department

Marketing

22

Engineering

15

Product

14

Design

5

Ops

4

Finance

3

Data

2

Security

2

Seniority

Senior

41

Mid

9

Manager

8

Lead

6

Director

2

Junior

1

Principal

1

Staff

1

Notable leadership hires: Director of Engineering, Creative Lead

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About Flo Health Inc.

Founded in 2015 and headquartered in London, Flo is a period, fertility, and pregnancy tracking application used by 77 million monthly active users, including approximately 25% of US women. The company operates a freemium model with premium subscriptions and has established partnerships—notably with UNFPA—to provide free premium access to women in underserved regions. Beyond the mobile product, Flo maintains a health content library, pregnancy-to-menopause guidance, and a peer community feature. The organization employs over 100 medical experts to curate clinical guidance. Current operational focus includes SOC 2 and HIPAA compliance infrastructure, privacy-first AI tooling, and subscription value optimization.

HeadquartersLondon

Company Size501–1,000 employees

Founded2015

Hiring MarketsUnited Kingdom, Lithuania, Poland

Frequently Asked Questions

What tech stack does Flo Health use?

Flo's core stack spans Kotlin and Swift for mobile (iOS/Android), Java and Scala for backend, SQL for data, and AWS/GCP for cloud infrastructure. Analytics run on Looker and Tableau, with React/TypeScript for web experiences.

Where is Flo Health headquartered?

Flo Health is headquartered in London, United Kingdom. The company also hires in Lithuania and Poland, reflecting distributed Eastern European engineering presence.