Natural Cycles° is a leading women’s health company that developed the world’s first birth control app, used by millions globally. We are a fast growing startup, and we promote an international working environment filled with smart and ambitious colleagues based in Stockholm, Geneva, New York, and remotely. Our mission is to pioneer women’s health through research and passion, empowering every woman with the knowledge she needs to take charge of her health.
We're looking for a Senior Frontend Engineer to join our Product Growth team with a focus on optimizing the web sign-up funnel. In this role, you will take ownership of the technical direction of our web sign-up experience – shipping high-quality, accessible, and performant user interfaces, and helping more people discover and get started with Natural Cycles.
You will play a key role in shaping the first touchpoints of our web experience, working in a fast-paced, data-informed environment where your code has a direct and visible impact on conversion and growth. You will also be a technical mentor for junior engineers on the team and contribute to raising the bar across the codebase.
Please note that we are hiring for this role in Sweden.
What you will be doing
Owning and driving the technical delivery of the web-based sign-up funnel, from architecture decisions to shipping polished user interfaces.
Building and running A/B experiments, iterating rapidly based on real-time results and data insights.
Setting the standard for code quality, performance, and accessibility within the team.
Mentoring and supporting junior engineers through code reviews, pairing, and technical guidance.
Collaborating closely with product managers, designers, and analysts to deliver user-facing features of the highest quality.
Contributing to a healthy, scalable, and sustainable codebase.
Working hands-on with analytics and data, taking a data-driven approach to frontend decisions wherever possible.
Ensuring continuous delivery of new releases while working in an agile way.
What skills and experience we think you have
5+ years of professional experience in frontend development, with a strong portfolio of shipped web products.
Experience working with backend or full-stack development
Deep expertise in TypeScript and the Angular framework (or equivalent experience with another modern component-based framework and the ability to ramp up quickly).
A strong command of modern CSS – Flexbox, Grid, and experience with pre/post-processors such as SASS or PostCSS.
Solid experience building responsive, performant, accessible, and inclusive user interfaces.
Experience with A/B testing and conversion rate optimization.
Comfort working with data and analytics tools to inform and validate decisions.
Experience with Git, GitHub, pull requests, and conducting thorough code reviews.
The ability to communicate clearly and collaborate effectively across disciplines.
It's a plus if you also have
Leadership experience
Background in growth-focused product teams or experience with web sign-up funnels.
Commercial acumen and an understanding of business drivers.
A passion for women's health.
Our technology stack includes:
TypeScript, Node.js, Express.js running on GCP
React Router 7, React, Angular, Capacitor, Ionic on the Frontend
Firebase Hosting
Highly automated CI pipelines (Github Actions)
AppStore/GooglePlay releases on a biweekly basis
We <3 Open Source, encourage Open Source contributions and often open our general-purpose repositories
What we offer
Flexible work arrangement - you will be part of a team based in and around Stockholm that values effective collaboration and transparent communication, irrespective of work location
Professional development - you will collaborate with industry leading developers, promoting continuous growth and skill enhancement
Modern technology - you will leverage innovative technologies and tools, within an environment that empowers you to contribute ideas and take ownership of your work
Impactful projects - you will contribute to groundbreaking projects that redefine industry standards and create tangible value
Commitment to quality - you will join a dynamic and progressive organization that prioritizes profitable, long-term product development
Location
We are remote-friendly, but we find great value in being able to connect with our teams in person. Most of the Product Growth team you will work with is located in Stockholm, and the team occasionally meets in the office for collaboration and face-to-face time.
Sounds interesting?
If you want to be part of a successful team, we encourage you to apply for this position as soon as possible.
We look forward to hearing from you!
How to apply
To apply, just upload your CV and answer the questions on the application form. Keep in mind that we can't accept applications through email because of GDPR, and only applications submitted via the career site (and in English) will be considered.
At Natural Cycles we value diversity and inclusion because we know that teams with people from different backgrounds and experiences are stronger. We welcome candidates from all walks of life and are committed to creating an inclusive environment for all employees and candidates.
Note: We are not looking for consultants or help from recruitment agencies

We have developed the only digital method of birth control cleared by regulators both in the US and in Europe. Effective, natural, and backed by clinical research - Natural Cycles has been cleared by the US FDA and CE marked in Europe. Today we have a growing user base, who are happy to have found a method of birth control that is right for them and that allows them to get to know their bodies and cycles. No matter what your choice is, we believe that every woman should know that understanding how your cycle works matters.
Natural Cycles was created when our founders, Elina and Raoul, were in search of an effective method of natural birth control. Their journey took them from physics straight into health tech for women. The couple were unsatisfied with what they found, so they decided to apply their experience and knowledge in advanced mathematics and data analysis to develop a solution to meet their needs. This turned out to be an algorithm that detects and predicts ovulation and fertility.
In the early days, they used the algorithm for their own purposes but quickly realized that there was a vast unmet need for this type of method. They decided to develop a mobile app so women from all over the world could easily access and use Natural Cycles.
Our company has been up and running since 2013 and has been rapidly growing since our CE certification in February 2017. At Natural Cycles we are always looking for passionate talents to help us strive for change in such a complex, scientific, and controversial field. We have women's best interest at heart and work hard every single day to ensure that we provide the best possible solution. That’s why each and every team member is passionate about what we do.
Gathered from all corners of the world we are a tight-knit international team located right in the center of beautiful Stockholm. If you would like to join us, check our open job positions below, go ahead and connect with us.