Senior Backend Dev - Fintech Payments, Secure & Scalable

Payxpert; País Vasco; Híbrido; EUR 60.000 - 85.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible hours

Wellbeing summer schedule

Free language courses

Descripción de la vacante

PAYXPERT seeks an experienced Senior Backend Developer to design, build, and evolve backend services for its Payment Gateway, Secure Store and core payments platform. You will work across PHP (e-commerce gateway) and Java/Kotlin components, focusing on security, reliability and scalable performance.

You will own backend components end-to-end, contribute to CI/CD and testing, and collaborate with Product Managers in an Agile environment.

Formación

• Bachelor’s degree in Computer Science, Engineering, or related fields.
• 7–10 years 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 working with REST‑based backend architectures and service‑oriented systems.
• Git, GitLab, Docker, CI/CD pipelines, and issue‑tracking tools.
• Hands‑on experience using AI coding assistants in a professional software development workflow, with an understanding of their security and data‑confidentiality implications.
• Exposure to or ability to collaborate on systems built with Java / Spring Boot is a great plus.
• Fluent English is mandatory.
• French and/or Spanish are a plus.

Responsabilidades

• Design, develop, and maintain payment-oriented backend services across PHP and Java/Kotlin codebases.
• Own backend components end-to-end, from design and implementation through production support.
• Apply secure coding practices and participate in incident analysis related to payment services.
• Design and perform unit and integration testing; participate in code reviews.
• Collaborate with Product Managers using agile methodologies.

Conocimientos

Fluent English

REST APIs

Agile methodologies

Code review

Problem solving

Educación

Bachelor's degree in Computer Science or related

Herramientas

Git

GitLab

Docker

CI/CD pipelines

Java Spring Boot

AI coding assistants

Descripción del empleo

PAYXPERT seeks an experienced Senior Backend Developer to design, build, and evolve backend services for its Payment Gateway, Secure Store and core payments platform. You will work across PHP (e-commerce gateway) and Java/Kotlin components, focusing on security, reliability and scalable performance.

You will own backend components end-to-end, contribute to CI/CD and testing, and collaborate with Product Managers in an Agile environment.