Would you like to join a fast-growing international fintech startup  with a product already handling hundreds of millions of euros?
We are looking for a Senior Backend Engineer  who wants to have a high impact from day one  and be part of a small, international, and highly collaborative team.
 What you’ll do 
- Design and scale resilient, efficient backend systems .
 
 
- Write clean, high-quality code in Python/Django  (hands-on, daily coding).
 
 
- Take ownership of architecture and infrastructure decisions  (AWS: RDS, ECS, Kafka, synchronous/asynchronous tasks).
 
 
- Collaborate with a multidisciplinary team (backend, frontend, product, security, data).
 
 
- Contribute to the evolution of a product with 150,000+ users , growing at double-digit rates month over month.
 
 
What they’re looking for 
- Solid experience in Python  (Django is a plus, but not strictly required).
 
 
- Strong knowledge of AWS infrastructure  and distributed systems.
 
 
- Previous experience in startups or scaleups  with growing products.
 
 
- Ownership mindset and ability to bring technical vision.
 
 
- Strong English communication skills.
 
 
- Bonus: interest in AI development platforms (e.g., Cursor).
 
 
What they offer 
- Competitive salary.
 
 
- Real impact on a fintech product that helps thousands of people.
 
 
- Open, collaborative, and highly international culture (team members from across Europe and LatAm).
 
 
- Office in the heart of 22@ (Barcelona), just three blocks from the beach.
 
 
- 2 days of teleworking per week.
 
 
- Dynamic environment with afterworks, team events, and two company-wide gatherings per year.