Senior Frontend Engineer (Growth Pillar)

WeWard SAS; Paris; Hybride; EUR 70 000 - 110 000; Plein temps

Avantages offerts par ce poste

Global team in multiple cities

Healthy work-life balance

Learning & dev budget

Hybrid work with 2 remote days

Résumé du poste

WeWard SAS is seeking a Senior Frontend Engineer (React Native) to join the Growth Squad in Paris. You will own onboarding and key in-app surfaces, drive experimentation, and ship high-quality mobile experiences for a global user base.

You’ll collaborate with PMs, Designers, and leadership to push growth initiatives and improve retention and engagement. In this role, you’ll contribute to frontend architecture decisions and help reduce technical debt while delivering measurable value.

Qualifications

• 5+ years of experience as a Frontend Engineer.
• Able to craft polished, performant, instrumented interfaces.
• Interest in AI as a productivity multiplier.
• Experience with startups or fast-moving teams is a plus.
• Interest in health and wellness sector.”

Responsabilités

• Design, develop, test, and ship React Native code with strong ownership.
• Own onboarding, first-week flows, and in-app surfaces.
• Build and run end-to-end A/B tests behind feature flags and instrument analytics.
• Lead projects end-to-end from scoping to production.
• Collaborate with PMs, Designers, CTO and Platform teams on architecture and priorities.

Connaissances

Frontend engineering

React Native

Mobile apps

Ownership

Outils

RN tooling

Description du poste

Hi there!

About us

WeWard is the app that rewards you for walking and turns everyday steps into real-life rewards, connections, & positive impact!

Our mission is help people move more, feel better, and make movement meaningful.

Today, we are trusted by 30M+ users worldwide, with a fast-growing, international team and offices in Paris and New York.

Our ambition is to build the world's leading movement-and-rewards platform, scaling globally while using technology, data, and smart incentives to drive lasting behavior change and wellbeing at scale.

About the role

Reporting to the Growth team, alongside Charles, you'll work as a Senior Frontend Engineer (React Native) focused on the surfaces that turn strangers into daily active users: onboarding, in-app experiences, lifecycle touch-points and continuous experimentation.

At WeWard, we're entering an exciting new phase of evolution (expanding far beyond a simple step counter). You'll have the opportunity to work on major upcoming growth initiatives!

In a consumer app used worldwide, every percentage point of conversion, performance, or polish directly translates into user growth (or loss).

The Growth Squad at WeWard works on 3 core elements: Acquisition, Engagement & Retention. You'll own the client-side of that mission: shipping the screens and in-app moments users see first, and the experiments that tell us what works.

Your impact / responsibilities

As a Senior Frontend Engineer inside the Growth Squad, you will:

Ship and own

• Design, develop, test, and ship reliable, maintainable React Native code, with a strong sense of ownership over what you build

• Own high-impact in-app surfaces: onboarding & first-week flows, profile, milestones, Live Activities & widgets touch-points

• Build and run A/B tests end-to-end behind feature flags, instrument analytics cleanly, and iterate on the results

• Take initiative and lead projects end-to-end, from scoping to production

Drive technical excellence

• Hunt down client-side bottlenecks (renders, startup time, memory) and ship concrete fixes

• Contribute to frontend architecture decisions at the pillar level, in coordination with the CTO, Engineering Manager and Platform team

• Identify and elevate technical risks before they become incidents: fragile areas, critical debt

• Drive long-term technical debt reduction without derailing the roadmap

Collaborate

• Work upstream with PMs and Designers to assess feasibility, frame trade-offs, and build realistic delivery plans

• Share knowledge and raise the frontend bar across the pillar

Our app frontend is built in React Native (but we value the ability to craft fast, polished, measurable product experiences more than any single tool).

You should care as much as possible about UI quality while remaining pragmatic about delivering value to users. It's important to have a clear vision of the ideal experience we should aim at.

Beyond pure development, we expect you to understand what is at stake for the business, and help stakeholders give birth to their vision

Our commitments

• SUCCEED — You'll join a team of passionate people who share values of ambition and determination

• TRUST — We give you real autonomy, trusting you to reach your goals in your own way

• EXPLORE — You'll grow in a culture that is constantly evolving and curious about what's next

• PROGRESS — We'll support you through challenges, learn from mistakes, and move forward together

• SMILE — And every day, you'll be part of a fun and positive environment where humor is always welcome

Preferred experience

What we're looking for

You're the perfect match if…

• You have 5+ years of experience as a Frontend Engineer, with strong React Native expertise on large-scale, high-traffic consumer apps, and a strong sense of ownership over what you build.

• You can turn a product/design intention into a polished, performant and instrumented interface, ship it behind a feature flag, and iterate on the metrics.

• You treat AI as a daily productivity multiplier and are eager to push how far it can take your craft.

• You love combining continuous improvement and agility, always bringing new ideas to the table. At WeWard, our spirit is Test & Learn (we deploy to production more than ten times a week!).

• You have a natural interest in the startup world and want to make a tangible impact in your next adventure.

• You're motivated by contributing to the health and wellness sector.

• You're eager to evolve in an international environment (WeWard is now present in Spain, Italy, the US, Germany, the UK, and more!).

If this sounds like you, apply (we'd love to meet you).

What we offer

• A global, mission-driven team with teammates in Paris, NY, London, Boston!

• A healthy work/life balance (we walk the talk)

• Annual learning & dev budget (you grow, we grow)

• Hybrid work, with 2 days of remote work per week

• (Really, really) Cool office in central Paris with snacks, a walking desk and a huge Wardy hanging around

Recruitment Timeline

1. 30-min intro call with Valentine, our Talent Acquisition Lead — the friendly first hello to get to know your story, your expectations, and introduce you to WeWard.

2. 45-min technical chat with Charles, your future manager, to dive into the role and missions.

3. At-home case study followed by a 1-hour debrief with Charles

4. Final interview & office tour to meet the team .
   

And if it’s a match…Welcome to the adventure!