Full Stack Mobile App Software Engineer

Top 3 reasons to join us

• Attractive salary
• Fun, flexible and challenging work
• A purpose: improve the life of thousands of women

Job description
Our Mission

• Perifit is a profitable and fast-growing femtech startup based in Paris, France, with a software team based in Ho Chi Minh City. Turnover was multiplied by 100 in 5 years

Our goal is to assist women worldwide with the most challenging moments in their lives – moments that are heavily under-addressed – and provide fun and effective self-care solutions.

Our first product, the Perifit (a connected probe and its mobile games), launched in 2018, has become the #1 connected solution for pelvic floor rehabilitation. As of now, it has helped more than 500,000 women and is the best-ranked app in its category.

We now develop innovative pelvic floor trainers and breast pumps that use the most recent technologies to help women improve their lives. Our mission is to empower women to take control of their health and improve their overall well-being.

At Perifit, we stand for equality, inclusivity, benevolence, and wellbeing for both our clients and our employees.

Joining Perifit means being part of a dynamic, mission-driven team that is making a real difference in women's lives, and having the opportunity to contribute to a growing and innovative startup in the Femtech industry

We're very proud of our values FREEDOM – FEMINISM – STARTUP MINDSET – REAL IMPACT – NO EGO

Why we need you

Our apps (Perifit Care and Perifit Pump) are technically ambitious: hybrid mobile applications that combine Bluetooth connectivity, game logic coded in Unity, and a React Native user interface, with a backend based on MySQL PHP. We need a technical leader who can ensure the robustness, scalability, and reliability of this stack, while guiding the mobile app team.

You will initially focus on Perifit Pump. You will be the go-to technical reference for the apps, capable of understanding the big picture and going deep into specific parts when needed.

What you will be doing

• Technical Leadership: Lead the development of our mobile applications, set technical standards, and mentor junior engineers in the Ho Chi Minh City team.
• React Native Development: Own the front-end architecture, ensuring high performance, maintainability, and a smooth UX.
• Unity Development: Contribute to and oversee the implementation of Unity game modules integrated within the mobile apps.
• Backend & Database: Interface with our backend (Firebase + PHP/MySQL) to ensure smooth data management, and contribute to backend improvements when necessary.
• Algorithms & Signal Processing: Implement and optimize real-time algorithms for signal processing, noise reduction, and decision-making within the app.
• App Deployment: Support app releases on iOS and Android stores, manage CI/CD pipelines, and ensure smooth updates.
• Cross-team Communication: Act as the bridge between engineering and product teams, translating technical challenges into clear explanations for stakeholders.
• Regulatory-readiness mindset: Work in coordination with QA/RA teams to ensure features are developed with robustness and traceability in mind, in line with CE/FDA requirements.

You will shine if

• You've already deployed complex React Native + Unity applications at scale.
• You have experience with Bluetooth-connected consumer devices.
• You've worked in a regulated healthcare or medtech environment.
• You are familiar with CI/CD and DevOps pipelines for mobile applications.

Your skills and experience

• React Native Mastery: Strong experience in React Native development for cross-platform apps.
• Unity Development: Proficiency in Unity game development and its integration into mobile applications.
• Backend & Database: Knowledge of Firestore and SQL/MySQL databases.
• Algorithms & Signal Processing: Solid understanding of applied mathematics, real-time data processing, and algorithm design.
• Full-Stack Awareness: Ability to work across the stack (mobile, backend, database) and ensure coherent architecture.
• Mobile Deployment: Familiarity with publishing apps to the App Store and Google Play.
• English Proficiency: Excellent written and spoken English for technical reporting and cross-team collaboration.

Why you'll love working here

You'll be building applications that directly impact the lives of hundreds of thousands of women – and their families. Your role will combine hands-on development with leadership responsibilities, giving you both technical depth and strategic influence.

• Insurance benefits provided through PTI
• Flexible and Friendly Work Environment: Dynamic startup culture, international team, and a focus on wellbeing.
• Annual bonus up to 20% of total annual salary (includes 13th-month salary and performance bonus)
• Company bonus based on the company's performance

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