Senior Frontend Engineer - Monetization & Reward Pillar

WeWard SAS; Paris; Sur place; EUR 60 000 - 80 000; Plein temps

Avantages offerts par ce poste

Hybrid work model

Healthy work/life balance

Annual learning & development budget

Cool office atmosphere with snacks

Résumé du poste

WeWard SAS in Paris is seeking a Senior Mobile Engineer to enhance the user experience of their rewards app. You will be responsible for shipping mobile features, optimizing performance, and leading the reward experiences that turn user engagement into real value.

The role requires a minimum of 5 years of experience with TypeScript and React Native, a strong focus on conversion and performance, and a collaborative mindset. WeWard offers a hybrid work model with a balanced work/life culture, promoting continuous improvement and innovation.

Qualifications

• 5+ years of experience as a Mobile Engineer, proficient in TypeScript and React Native.
• Experience shipping production apps at scale.
• Ability to understand and debug complex codebases.
• Motivated by conversion, performance, and detail.

Responsabilités

• Ship mobile features end-to-end on iOS and Android.
• Lead reward experiences and build conversion-focused flows.
• Optimize performance and reduce long-term debt.

Connaissances

TypeScript

React Native

Mobile Engineering

Debugging complex codebases

Performance optimization

Agile methodologies

Outils

Sentry

Datadog

Firebase

Description du poste

About us

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

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

Today, we are trusted by 25M+ 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 directly to Ivan, you’ll work as a Senior Mobile Engineer on the pillar that turns WeWard's promise — walk, and get rewarded — into a delightful, trustworthy experience.

WeWard rewards walking — the Monetization & Reward Pillar is where those rewards come to life. We turn user engagement into real value through partners, affiliation and advertising, and we hand that value back to users as Wards. Your job is to make earning and spending Wards feel effortless, generous, and worth opening the app for.

You’ll face the challenge of operating a large‑scale international consumer app handling billions of interactions and strong peaks of activity every day, where the experience has to feel fast, fair, and trustworthy because real money is flowing back to real users.

The Monetization & Reward Pillar works on 3 core ambitions:

• A rewarding experience — make earning and spending Wards feel effortless, generous, and worth coming back for.
• Conversion that funds the mission — craft reward and partner journeys that users love and that sustain the whole reward economy.
• Integrity & trust — surface rewards, offers, and balances in a way users can always trust, because every Ward maps to real value.

Your impact / responsibilities

As a Senior Mobile Engineer inside the Monetization & Reward Pillar, you will:

Ship and own

• Ship mobile features end‑to‑end on iOS and Android.
• Lead the reward experiences — the reward store/catalog, partner & affiliation journeys, earning and spending Wards.
• Build conversion‑focused flows and experiments that grow monetization while keeping the experience generous and fair.

Drive technical excellence

• Optimize performance, load times, and resilience on screens that drive real revenue.
• Contribute to pillar‑level architecture with the CTO and Engineering Manager.
• Spot fragile areas, debt, and integration risks early.
• Reduce long‑term debt without derailing the roadmap.

Collaborate and mentor

• Frame trade‑offs with Product, Design, and the monetization team.
• Guide pillar engineers on complex technical decisions.

The app is built with React Native and TypeScript, with native Android (Kotlin) and iOS (Swift) modules where it matters.

Preferred experience

You’re the perfect match if…

• You have 5+ years of experience as a Mobile Engineer, with strong proficiency in TypeScript and React Native, and hands‑on experience shipping production apps at scale.
• You’re able to understand and debug large, complex codebases — and you enjoy it.
• You care about conversion, performance, and detail — the difference between a good and a great reward experience.
• You can leverage AI and are eager to grow your skills with it.
• You love combining continuous improvement and agility, always bringing new ideas to the table. At WeWard, our spirit is Test & Learn — we trust you to experiment (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 working close to the business — rewards, conversion, and the trust users place in us.
• You’re eager to evolve in an international environment — we have offices in NYC and operate worldwide.

Bonus

• Experience with monetization, e‑commerce, in‑app purchases, paywalls, or reward/loyalty mechanics.
• Experience running A/B tests and conversion experiments on mobile.
• Familiarity with mobile observability and monitoring tools (Sentry, Datadog, Firebase…).
• Passionate about clean, well‑tested, and maintainable code. Takes ownership and pride in code quality.

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.
• Hybrid work, with 2 days of remote work per week.
• Cool office in central Paris with snacks, a walking desk and a huge Wardy hanging around.

Recruitment timeline

1. 30‑min technical chat with your future manager — to dive into the role and missions.
2. At‑home case study followed by a 1 hour debrief with 3 collaborators, including time for mutual feedback.
3. 30‑min call with Kaënaath, our Talent Acquisition Specialist — to discuss your background, expectations, and answer your last questions about WeWard.
4. Office tour to meet other team members.