• Collaborate closely with product managers, designers, and cross-functional partners (Billing, Financial Data Engineering, etc.) to deliver reliable payments functionality. • Design, build, test, and maintain backend services and APIs powering financial transactions. • Work with metrics and logging systems to ensure visibility and observability of the payment infrastructure. • Focused on delivering high-quality, production-grade code on time. • Strong contributor to the team’s coding efforts and reviews. • Work on well-defined problems with guidance from senior engineers. • On-call work may be necessary occasionally to help address bugs, outages, or other operational issues.

• Diseñar, construir y operar servicios backend robustos y escalables sobre .NET (ASP.NET Core) y SQL Server, habilitando arquitecturas de microservicios y APIs seguras. • Asegurar calidad, performance, resiliencia y observabilidad de los servicios, incluyendo workers/servicios Windows para procesamiento asíncrono. • Participar en el diseño e implementación de gateways y reverse proxies (YARP/Ocelot), y fortalecer los esquemas de seguridad (JWT/OAuth2) y buenas prácticas de ciberseguridad (OWASP, hardening, gestión de secretos, auditoría). • Diseñar e implementar APIs y microservicios en .NET (ASP.NET Core) con estándares de seguridad y calidad. • Construir y optimizar capa de datos en SQL Server: SPs, vistas, funciones y triggers con enfoque en performance. • Implementar seguridad: autenticación/autorización JWT (roles/claims), políticas, expiración/refresh (si aplica). • Asegurar prácticas de ciberseguridad: validación de entradas, protección contra ataques comunes, hardening y secretos. • Aplicar observabilidad: logging estructurado, métricas, trazas distribuidas y dashboards para operación.

• Develop, test, and maintain applications using Java and Kotlin. • Design and implement cloud solutions using the AWS platform, ensuring efficiency and scalability. • Collaborate with developers, designers, and stakeholders to build software solutions that meet business needs. • Participate in code reviews and ensure the quality of delivered products. • Create and maintain clear and accessible technical documentation. • Monitor and optimize the performance of applications in production.

• Design and evolve relational schemas, including tables, indexes, constraints, and relationships. • Develop and optimise SQL queries, stored procedures, functions, and other database driven logic. • Analyse execution plans and identify improvements to performance and efficiency. • Work hands on with OLAP cube–based data models, including designing and modifying dimensions, hierarchies, and measures. • Develop, optimise, and troubleshoot OLAP related queries. • Support feature teams with developing and maintaining the database. • Diagnose and resolve issues involving locking, contention, inefficient joins, and indexing gaps. • Recommend and implement indexing, partitioning, or structural improvements. • Participate in load testing and capacity discussions related to the data layer. • Participate in design and peer reviews. • Mentor team members on SQL best practices, schema design, and performance techniques. • Work within a small agile team to deliver high quality features and continuously improve engineering practices. • Document data structures, conventions, and patterns for broader engineering use.