Backend Developer (QA)

PagoNxt Payments is Santander Group’s global payments platform, focused on providing tailored financial infrastructure for companies, banks and fintechs – both inside and outside the Santander ecosystem. With operations in more than 10 countries, our mission is to simplify payments and empower businesses through secure, flexible, data‑driven technology. We use a cloud‑native architecture to support international transactions, FX, multi‑currency accounts, regulatory compliance and fraud prevention, all under a unified approach. The team spans Spain, Brazil, Mexico, Portugal, the UK and Germany, building the future of payments at a global scale.

What you’ll do:

• Develop microservices and test suites (unit, integration, regression).
• Automate certification of integrations (APIs, queues, files) and integrate into CI/CD.
• Design simulation and contract testing scenarios.
• Document results and contribut...