Flo Health Inc.

At Flo, our purpose is to build a better future for female health. We are the world’s leading period and ovulation tracker, empowering over 420 million women globally to take control of their health. With 75 million monthly active users, including 25% of US women, Flo has become a trusted partner in women's health. As the first European femtech unicorn, following a $230M Series C in July 2024, we're proud to lead the way in innovation and investment in women's health. With over 120+ medical experts, Flo is committed to supporting women at every stage of their health journey, from menstruation to conception, pregnancy, and menopause. We provide curated cycle and ovulation tracking, tailored health insights, daily bite-sized visual content, and a private community for users to share their questions and concerns. Flo addresses critical challenges in women’s health by: *Expanding access: Through partnerships like UNFPA, Flo provides free Premium access to up to 1 billion women in 66 countries, with 17 million subscriptions donated, helping bridge healthcare disparities. *Improving health literacy: By delivering accurate, accessible information and daily insights, Flo empowers millions to better understand their health and make informed decisions. *Advancing women's health research: Collaborating with leading institutions, Flo contributes to evidence-based women’s health research. In a world where women's health data is increasingly vulnerable, Flo is dedicated to providing a safe and secure platform. Recognized for its commitment to privacy, Flo's Anonymous Mode feature was named one of TIME's Best Inventions of 2023 and a finalist for Fast Company's 2023 World Changing Ideas Awards. Anonymous Mode allows users to access Flo's health features without associating personal information with their health data, setting a new industry standard for reproductive health data privacy.

flo.health

Flo Health Inc.

flo.health

HQGB

Team Size696

Open Jobs38

Total Funding$83M

Latest FundraiseUnknown

TL;DR

Sector: Femtech / Women's health app

Founded: 2015

Scale: ~70 million monthly active users (company-reported range 2024–2025)

Unicorn status: Valued > $1B after Series C in July 2024

Notable investor: General Atlantic (Series C, >$200M)

ISO 27001 and ISO 27701 certifications

Privacy/security:

Related Companies

Company	HQ	Industry	Total Funding
Cleo	🇬🇧GB	Finance	$138M
Elliptic	🇬🇧GB	Security	$101M
ZOE	🇬🇧GB	Health	$100M
Flawless	🇬🇧GB	Software	-
Lendable	🇬🇧GB	Finance	$294M

Company Overview

Problem Domain

Female reproductive and menstrual health; personalized health insights and lifecycle care.

Founded

2015

Industry

IT Services and IT Consulting

Funding Track Record

Series C- July 30, 2024

> $200,000,000

Minority investment that valued the company above $1 billion post-money.

Series B- September 9, 2021

$50,000,000

Investor Signal

“General Atlantic led a >$200M Series C in 2024, providing growth-stage investor support and resulting in a >$1B valuation.”

Join the Team

Data Science Lead

HybridLondon, GB

Hybrid • London, GB

About the Company

Flo is the world’s #1 health app on a mission to build a better future for female health. With over 400 million downloads and 75 million monthly users, we have established ourselves as a leader in the industry. Backed by a $200 million investment led by General Atlantic, we became the first product of our kind to reach a $1 billion valuation in 2024.

With 6 million paid subscribers and the highest-rated experience in the App Store’s health category, we have spent a decade earning trust at scale. We are now focused on building the next generation of digital health—AI-powered, privacy-first, and clinically backed—to help our users know their bodies better.

About the Role

Data Science Lead London Full-time Data Science

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Technical Writer

Part-timeRotterdam, NL

Part-time • Rotterdam, NL

Mobile Developer

Part-timeCambridge, GB

Part-time • Cambridge, GB

Machine Learning Engineer

Full-timeCambridge, GB

Full-time • Cambridge, GB

Frontend Developer

InternshipNovi Sad, RS

Internship • Novi Sad, RS

DevOps Engineer

Full-timeAmsterdam, NL

Full-time • Amsterdam, NL

Frontend Developer

InternshipTel Aviv

Internship • Tel Aviv

Employment Type:

Lead and develop a team of 4+ ML and Backend engineers, including hiring, mentoring, and setting technical direction.
Own the predictive lifetime value (pLTV) strategy, architecting and evolving core models that inform user acquisition decisions.
Build production ML systems, including Marketing Mix Modeling (MMM) algorithms and real-time forecasting models handling millions of daily predictions.
Drive cross-functional impact by partnering with Growth, Product, and Finance to translate business problems into ML solutions.
Shape technical architecture by guiding MLOps infrastructure, monitoring, and rapid iteration cycles.
Stay hands-on by contributing to modeling, architecture decisions, and technical problem-solving as needed.

Technical Leadership

7+ years of applied ML experience building and deploying models in production.
4+ years managing technical teams (ML engineers, data scientists, or similar).
Expert knowledge of ML fundamentals: supervised/unsupervised learning, time series, causal inference.
Experience with modern ML frameworks (PyTorch, TensorFlow, scikit-learn, CatBoost).

Growth & Product Experience

Experience with growth analytics, attribution modeling, or marketing effectiveness.
Understanding of user acquisition funnels and retention optimization.
Comfortable translating business requirements into technical roadmaps.
Strong communication skills, able to explain complex models to executive stakeholders.

Production ML Systems

Experience deploying ML models at scale (millions+ predictions/day).
Knowledge of MLOps practices: model versioning, monitoring, automated retraining.
Understanding of data engineering fundamentals and cloud platforms.

Experience with Marketing Mix Modeling, attribution, or ad tech.
Background in consumer tech, mobile apps, or health tech.
Knowledge of privacy-preserving ML techniques and A/B testing methodology.

We are a mission-led, product-driven team that values speed, focus, and ownership. We encourage debate and share decisions, caring about our craft and shipping with purpose. We believe that better health outcomes are worth the commitment, resilience, and drive to keep going when challenges arise.

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 and home working, with up to 2 months a year working abroad.
5-week fully paid sabbatical at 5-year Floversary.
Flo Premium for friends and family, plus additional health, pension, and wellbeing perks.

Flo Health Inc.

Flo Health Inc.

TL;DR

Related Companies

Company Overview

Problem Domain

Founded

Industry

Funding Track Record

Investor Signal

Founders

What we do

Join the Team

Data Science Lead

About the Company

About the Role

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Technical Writer

Mobile Developer

Machine Learning Engineer

Frontend Developer

DevOps Engineer

Frontend Developer

Responsibilities

Qualifications

Technical Leadership

Growth & Product Experience

Production ML Systems

Nice to Have

Company Culture

Benefits