Senior / Lead iOS Engineer

• 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

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- Hands-on experience building complex mobile applications with rich, performant UIs — experience in global consumer-facing products is a strong plus

• A collaborative, growth-oriented mindset with the drive to take ownership and deliver
• 6+ years in software engineering, with at least 3 years focused on building, shipping, and maintaining production mobile applications
• Strong familiarity with Apple’s ecosystem — frameworks, HIG guidelines, and end-to-end App Store submission and maintenance processes
• Expert-level iOS development skills, with a proven track record of delivering high-quality apps at scale
• Deep proficiency in Swift; working knowledge of Objective-C and solid object-oriented design principles
• Clear understanding of the mobile product lifecycle and comfortable working within Agile teams
• Experience integrating with BI and analytics platforms, with familiarity in designing and interpreting A/B tests to drive product decisions
• Hands-on experience with mobile CI/CD pipelines, including build automation, automated testing, and release workflows
• Proven experience optimizing mobile app performance over constrained networks, including building and maintaining offline-first architectures
• Solid understanding of UX and interaction design principles, with the ability to collaborate effectively with designers and advocate for quality user experiences