Apply for Senior Software Engineer at PagoNxt in Boadilla del Monte, MD, ES. This full‑time, on‑site position offers opportunities for career growth.
PagoNxt Payments is Santander Group's integral payments platform, focused on providing tailored financial infrastructure for companies, banks, and fintechs. We operate on a cloud‑native architecture designed to scale for global organizations, supporting international transactions, FX, multi‑currency accounts, regulatory compliance, and fraud prevention.
Responsibilities
- Design and implement new functionalities based on user stories, ensuring scalability and maintainability.
- Lead technical ownership of squad products from development to production, including incident management and performance optimization.
- Drive architectural and design decisions, conduct code reviews, and mentor junior team members.
- Define and implement comprehensive automated testing strategies, including unit, integration, and end‑to‑end tests.
- Leverage AI‑powered development tools to accelerate workflows and improve code quality.
- Evaluate, integrate,



and champion AI/ML‑assisted coding solutions within the team.
- Contribute to the definition of technical standards, coding guidelines, and architectural patterns for the squad.

Qualifications
- 5+ years of hands‑on experience developing microservices in Java Spring Boot in production environments.
- Strong knowledge of REST API design, implementation, and versioning best practices.
- Proven experience with Agile/Scrum methodologies in cross‑functional teams.
- Excellent English proficiency (B2+ or higher).
- Strong leadership mindset, proactive, independent, with excellent teamwork and mentoring skills.
- Ability to anticipate and mitigate technical risks.
- Solid understanding of relational data models, SQL, query optimization, and database performance tuning.
- Experience with messaging queues (Kafka preferred) and batch processing architectures.
- Demonstrated experience using AI‑assiste

📌 Senior Software Engineer at PagoNxt (España)
🏢 PagoNxt
📍 España