Senior Software Engineer - Backend - Billing Team

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer - Backend - Billing Team based in Spain.

• Join a small, high-impact engineering team building and scaling reliable backend systems for a rapidly growing digital product.
• Take ownership of backend features, APIs, services, and business logic that support critical product capabilities.
• Work on complex technical challenges while keeping simplicity, reliability, and long-term scalability at the center of engineering decisions.
• Contribute across the development lifecycle, from architecture and implementation through testing, code reviews, and production support.
• Help strengthen infrastructure resilience and redundancy as systems and workloads continue to scale.
• Collaborate closely with experienced engineers and product stakeholders in a flat, entrepreneurial environment.
• Have meaningful influence over technical direction and product evolution while working with a modern cloud-native technology stack.