Senior Payments Backend Engineer (PHP/Java/Kotlin)

PayXpert; España; Presencial; EUR 70.000 - 95.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Permanent contract

Flexible working hours

International, diverse teams across SP

Language courses

Descripción de la vacante

PayXpert in Spain seeks a Senior Backend Developer to design, build and evolve the backend services that support the Payment Gateway, Secure Store and other security‑sensitive components within the core payments platform.

The role spans mainly on the PHP‑based e‑commerce gateway but also on the Java/Kotlin payments platform components, working across these stacks to deliver and maintain secure transaction services.

Formación

• Bachelor's degree in Computer Science, Engineering, or related fields.
• 7–10 years of total backend development experience, including secure, high‑risk backend systems.
• 4–6 years in senior PHP/Java/Kotlin backend roles, owning production services and developing secure backend features.
• Experience with REST-based backend architectures and service-oriented systems.
• Strong familiarity with Git, GitLab, Docker, CI/CD pipelines, and issue-tracking tools.
• Hands‑on experience using AI coding assistants in a professional software development workflow, with security implications.
• Experience in payments/fintech or regulated environments is a strong plus.

Responsabilidades

• Design, develop, and maintain payment-oriented backend services across PHP (e-commerce gateway) and Java/Kotlin (core payments platform).
• Contribute to core payment backend applications with a focus on security-sensitive transaction flows.
• Identify gaps in core backend services and propose technical solutions aligned with business needs.
• Analyze requirements to assess feasibility and impact; own backend components end-to-end from design to production support.
• Co‑own the PHP e-commerce gateway, ensuring evolution, security and reliability.

Conocimientos

PHP

Java/Kotlin

REST APIs

Security

CI/CD

Git/GitLab

Docker

Educación

Bachelor's degree in Computer Science/Engineering

Herramientas

Git

GitLab

Docker

CI/CD pipelines

Descripción del empleo

PayXpert in Spain seeks a Senior Backend Developer to design, build and evolve the backend services that support the Payment Gateway, Secure Store and other security‑sensitive components within the core payments platform.

The role spans mainly on the PHP‑based e‑commerce gateway but also on the Java/Kotlin payments platform components, working across these stacks to deliver and maintain secure transaction services.