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.