Software Engineer

The Senior Software Engineer will join our Technical Architecture Team to design, build, and enhance the core components (services and internal libraries) that power our Payments Hub platform. This role requires deep expertise in Java and the Spring ecosystem, as well as strong engineering fundamentals in building resilient, scalable, and maintainable systems. This role is ideal for someone who thrives in complex domains, enjoys solving system-level challenges, and collaborates closely with architects and engineering teams. As a Senior Software Engineer, you will:

• Design, build, and maintain backend services and components using Java (preferably version 21 at least) and Spring (Boot, Cloud), ensuring high performance, reliability, and scalability.
• Develop reusable libraries and cross-cutting components to support multiple engineering teams and promote consistent standards across the organisation.
• Apply resilience patterns (circuit breaker, retries, fallbacks, bulkheads, caching, idempotency, etc.) to ensure robust behaviour in distributed environments.
• Drive quality through automated testing, clean code principles, and effective code reviews.
• Contribute to the design and optimisation of distributed systems, including asynchronous processing, event-driven architectures, and transactional workflows.
• Collaborate with DevOps and SRE teams on observability, performance optimisation, build-time/run-time tooling, and cloud-native best practices.
• Mentor and support other engineers, helping raise engineering standards and knowledge across the team.

Do you have experience in Scalability?, * Strong professional experience developing backend systems in Java (at least 10 years), with deep knowledge of Spring (Spring Boot + commonly used Spring modules).

• Experience developing and maintaining shared libraries, tools, or frameworks used across multiple teams.
• Demonstrated experience applying resilience and reliability patterns in production environments.

Education:

• Degree in: Systems/Computing Engineering

Technical Skills:

• Solid understanding of microservices, distributed systems, and common integration patterns (REST, messaging, asynchronous processing).
• Good understanding of software design principles.
• Strong problem-solving skills and the ability to reason about system-level interactions.
• Nices to have:

• Knowledge of JVM performance tuning and profiling tools.
• Familiarity with CI/CD, cloud platforms (AWS), and container orchestration (Kubernetes).
• Experience with build tooling (Gradle)

Medical insurance Dental insurance Wellhub Life insurance Annual healthcare Transportation allowance Meal voucher/food voucher Profit sharing program Access to self-development programmes Hybrid Collaborative environment: Successful candidate must be prepared to work 60% on site Next step Apply and if you know someone who might be looking for this opportunity, share it.

PagoNxt Payments | Your talent drives our future 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 over 10 countries, our mission is clear: to simplify payments and empower businesses through secure, flexible, data-driven technology. We operate on a cloud-native architecture designed to scale and adapt to the needs of global organizations. Our platform supports international transactions, FX, multi-currency accounts, regulatory compliance, and fraud prevention - all under a unified approach. PagoNxt Payments combines the agility of a fintech with the reliability of a global bank. With teams across Spain, Brazil, Mexico, Portugal, the UK, and Germany, we are building the future of payments at global scale. If you want to be part of the next generation of financial solutions - this is the place. Imagine your future. Care for your career. Simplify your journey. This means you'll have the opportunity to build impactful solutions, grow with real development opportunities, and thrive in a culture that values well-being, inclusion, and clarity. We combine flexibility, autonomy, and global collaboration - so you can focus on what matters, connect with purpose, and shape what's next. You'll find space to grow, real opportunities to lead, and a culture where everyone belongs and contributes.