Senior Backend Engineer

Hi there 👋

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

Reporting to the Tech team, alongside Aurélien, our CTO, you’ll work as a Senior Backend Engineer focused on improving our overall architecture to support WeWard’s growth and ambitions. You’ll contribute to the development of new, innovative features for our application.

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 initiatives

You’ll face the challenge of operating a large-scale international platform handling billions of interactions and strong peaks of activity every day. Excellence is key: in a consumer app used worldwide, every percentage point of performance, stability, or quality directly translates into user growth—or loss.

Your impact/responsabilities

As a Senior Backend Engineer at WeWard, you will:

• Design, develop, test, and deploy reliable and maintainable code (APIs or scripts).

• Optimize and improve the performance of SQL queries and Python code.

• Take initiative and be capable of leading projects from start to finish.

We’re looking for someone with a strong command of Python, ideally with experience in Flask (though we’re also open to other Python web frameworks such as Django or FastAPI).

You should be comfortable building and consuming APIs, care deeply about code quality, and know that Automation and CI/CD aren’t characters from Hogwarts 🧙— but key parts of a solid deployment process.

Beyond pure development, we expect you to challenge the infrastructure, propose meaningful improvements, and collaborate effectively with DevOps, Product, and Marketing teams 🤝

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’s 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

You’re the perfect match if…

• You have 5+ years of experience as a Backend Engineer, with hands-on exposure to large-scale, high-traffic systems and a strong sense of ownership over what you build.

• 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 around 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. 🎉

• ✈️ 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

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 introduce you to WeWard.

4. Office tour to meet other team members.

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