Back End Developer

At Luni, we build and scale B2C mobile apps used by millions of users worldwide. Our portfolio includes apps like Shorts, Astro Club and Scanner.

We operate in a subscription-driven environment where every product decision has a direct impact on revenue, retention, and long-term value. Most of our revenue comes from in-app subscriptions in the US.

Our culture

We value flexibility, collaboration, and ownership. Team members have the freedom to take initiative, share ideas, and challenge the status quo - all within a culture built on trust, attention to detail, and continuous learning.

About the role

We’re looking for an experienced Backend Developer to strengthen the Shorts team. You’ll join a team of senior Backend Developers and contribute at a high level from day one, with strong ownership over your scope.

What you will do?

• Design and architect scalable backend systems, write clean and maintainable production-ready code, and ensure reliability, performance, and security through solid engineering practices.
• Optimize application performance and design efficient data models, ensuring high availability, scalability, and integrity through thoughtful database management, caching strategies, and query optimization.
• Collaborate closely with Product, Frontend, and DevOps teams, actively contribute to team rituals, clearly communicate technical decisions, and proactively share knowledge to improve overall engineering quality and team performance.

Who you are?

Hard Skills

• Solid TypeScript/NodeJS backend framework experience (NestJS, AdonisJS or similar)
• Strong knowledge of SQL (MySQL / MariaDB / PostgreSQL)
• Experience with Redis (caching strategies)
• Experience with message queues (SQS or equivalent)
• Comfortable with Docker
• Good understanding of AWS (bonus but valuable)

Soft Skills

• Naturally curious : side projects, active in tech communities, interest in AI tools (Claude, Cursor, etc.)
• Comfortable in a fast-moving environment (changing priorities, evolving specs, quick iterations)
• Product-oriented mindset
• Ownership and autonomy
• Flexible Time Off & Work : Unlimited vacation, 2 remote days/week and work remotely for up to 30 consecutive days abroad.
• Daily Comforts : €14.64 meal vouchers (50% covered by Luni), and a brunch once a month with the team.
• Financial Well-Being : Company and retirement savings plans.
• Work-Life Balance with Benefiz : €1,800 annual allowance for personal services, culture, sports, remote-work equipment, vacations, and more.
• Wellness Perks : On-site gym in Bordeaux or Gymlib in Paris, plus a 100%-covered Benefiz health plan for you and your children.
• Family Support : Dedicated nursery spots, extra paid parental leave, and customized family-friendly benefits.
• Continuous Growth : Access to conferences, workshops, and training.
• Vibrant Culture : Choose to work from Bordeaux, Paris, or remotely, and connect through team-building events and seminars.

Equal opportunity employer

Research shows that women and other marginalized groups tend to only apply for a job when they meet every single criteria. Does this role sound like it was made for you, yet you don’t check every box? Reach out anyways! We’re an equal opportunity employer and are dedicated to fostering an inclusive and diverse environment for employees from all walks of life. We hire based on talent, and we’re proud of our global perspective.