Senior / Lead iOS Engineer, Flo Health
£95-120k
+ Opportunity to participate in Flo’s performance incentive scheme
3 days a week in office
Period tracker app
Open for applications
Period tracker app
501-1000 employees
Open for applications
£95-120k
+ Opportunity to participate in Flo’s performance incentive scheme
3 days a week in office
501-1000 employees
Company mission
To improve the health and wellbeing of every girl and woman worldwide.
Role
Who you are
- 6+ years in software engineering, with at least 3 years focused on building, shipping, and maintaining production mobile applications
- Expert-level iOS development skills, with a proven track record of delivering high-quality apps at scale
- Hands-on experience building complex mobile applications with rich, performant UIs — experience in global consumer-facing products is a strong plus
- Deep proficiency in Swift; working knowledge of Objective-C and solid object-oriented design principles
- Strong familiarity with Apple's ecosystem — frameworks, HIG guidelines, and end-to-end App Store submission and maintenance processes
- Clear understanding of the mobile product lifecycle and comfortable working within Agile teams
- A collaborative, growth-oriented mindset with the drive to take ownership and deliver
Desirable
- Solid understanding of UX and interaction design principles, with the ability to collaborate effectively with designers and advocate for quality user experiences
- Proven experience optimizing mobile app performance over constrained networks, including building and maintaining offline-first architectures
- Hands-on experience with mobile CI/CD pipelines, including build automation, automated testing, and release workflows
- Experience integrating with BI and analytics platforms, with familiarity in designing and interpreting A/B tests to drive product decisions
What the job involves
- As an iOS Engineer at Flo, you'll help shape the mobile experience for millions of people, and do genuinely meaningful work in women's health. Our app is trusted by 1 in 4 women aged 18–44 in the US and used across 100+ countries, with machine learning and AI powering accurate cycle predictions and personalised, medically credible health insights
- We build large-scale mobile applications with rich, intuitive interfaces - optimised for speed, accessibility and privacy. You'll join a cross-functional team working across the full mobile lifecycle, from feature ideation through to release and iteration, with real ownership over value delivery end to end
- We're not a feature factory. Our engineers are pragmatic problem-solvers who thrive in fast-moving environments and care about what they ship. You'll have genuine scope to experiment, lead ambitious product initiatives and implement solutions that matter - not just clear a backlog. Flo is a constantly evolving product, and we give our engineers the trust and autonomy to evolve it
- Building and maintaining features using modern frameworks, libraries, and internal component systems, ensuring consistency, scalability, and code quality across the codebase
- Delivering polished, engaging user experiences that balance visual appeal with intuitive interaction design
- Owning and contributing to a robust Continuous Delivery pipeline, ensuring fast, reliable, and safe releases to production
Salary benchmarks
Our take
Flo is an AI-powered period tracking app that allows users to access health insights relating to their cycle by inputting experienced symptoms and cycle dates. AI is leveraged to improve the personalised predictions of upcoming symptoms or periods, allowing the platform to help predict irregular periods or highlight fertile periods in your cycle. They state that the app can also flag when symptoms might need medical attention.
What sets Flo apart from its competitors (Clue, Ovia, Glow) is its ability to change from a period tracker to a fertility tracker, and it can even offer valuable insights postpartum. The app is the number 1 period tracker in the UK and US and the most downloaded female health app worldwide, with over 77 million monthly users. And in the wake of the Supreme Court's 2022 decision to overturn Roe v. Wade, Flo has responded to its users' concerns by implementing an anonymous mode to prevent personal details from being linked to fertility data.
Historically, it has proved difficult for companies to get funding for products aimed at women. However, Flo has largely overcome this and secured significant investment through its funding rounds. This will allow the company to focus on implementing proactive care solutions in the app, amongst other developments, to evolve the service offered.
Steph
Company Specialist at Welcome to the Jungle
Insights
25% employee growth in 12 months
Company
Funding (last 2 of 7 rounds)
Jul 2024
$200m
SERIES C
Sep 2021
$50m
SERIES B
Total funding: $276.4m
Company benefits
- Participation in Flo’s success: We firmly believe every employee contributes to the company’s growth and its future success. All employees are eligible to participate in Flo’s Employee Share Ownership Plan (ESOP) and be awarded equity to participate in the long-term value creation of the business
- Family benefits: We know having a baby can be a big transition for the family, so we're proud to offer 1 month fully paid paternity leave to be there and bond with your baby and 6 months of fully paid maternity leave, with a $5000 bonus on your return to work to help you settle into this new chapter of your life. (Depending on your country there may be additional options for parental time off and shared parental leave beyond the early days)
- Resources you need to thrive: At Flo you will have access to internal and external learning resources and tools to challenge your knowledge and push yourself further every day. We support career progression from within through personal development plans and dedicated Learning & Development budget to help you thrive
- Holiday and sick leave: It’s important to take time off to recharge and spend time with family and friends. We offer 25 days (28 for vice presidents and above) paid holiday in addition to the local public holidays and 30 days fully paid sick leave per year
- Flexible workplace: We want to provide a setup that gives our employees the flexibility they need, while also getting important face to face time with the team. With this in mind, we encourage teams to spend 2 days/week in the office. Our popular Workation policy also allows you to work from anywhere for up to 2 months a year
Company HQ
St Katharine's & Wapping, London, UK
Leadership
Dmitry Gurski
(Co-Founder & CEO)Prior to co-founding Flo Health in 2015, Dmitry co-founded Edu4feature. They also founded IDEAnomix Digital and served as the Chief of Department at Piter Publishing House.
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