Senior Backend Developer - PHP (Cataluña)

The Senior Backend Developer is responsible for designing, building, and evolving the backend services that support PayXpert’s Payment Gateway, Secure Store, and other security‑sensitive components within the core payments platform.

Key Responsibilities

• Backend Development & Secure Domain Ownership:
  • Design, develop, and maintain payment-oriented backend services across both PHP (e‑commerce gateway) and Java/Kotlin (core payments platform) codebases
  • Contribute to core payment backend applications with a strong focus on security‑sensitive transaction flows
  • Identify gaps or limitations in core backend services and propose technical solutions aligned with business needs
  • Analyze business and technical requirements to assess feasibility and implementation impact
  • Own backend components end‑to‑end, from design and implementation through production support, and act as a co‑owner of the PHP e‑commerce gateway