About the Role
Envíe su solicitud a continuación después de leer todos los detalles y la información de apoyo sobre esta ocasión de trabajo. You will join a team that builds and runs payment connectivity services integrating a large-scale online payments platform with external payment service providers. You will own features end to end across backend services, serverless components, cloud infrastructure, and CI/CD, and contribute to the customer-facing payment flows.

What You'll Do
* Design, build, and maintain backend services that integrate with payment service providers for payment initiation and status retrieval.
* Develop and support webhook and callback handlers that process asynchronous payment events reliably and securely.
* Implement secure data exchange, including payload encryption and decryption and managed secrets.
* Define and maintain well-documented APIs that follow internal standards and are validated through automated checks.
* Secure inbound and outbound traffic using API gateway, edge, and cloud security controls.
* Manage cloud infrastructure as code and deploy services on a serverless, container-based platform.
* Build and improve CI/CD pipelines covering testing, validation, release automation, and deployment.
* Support production through monitoring, incident triage, root-cause analysis, and payment status reconciliation.
* Contribute to platform and edge improvements and to technical documentation.




* Collaborate with platform teams and external provider contacts. Required Skills
* Strong backend experience in Kotlin (or Java with a readiness to work in Kotlin) and a modern framework such as Micronaut or Spring Boot.
* Hands-on experience with Google Cloud Platform (serverless compute, messaging, load balancing, security, secret management).
* Experience designing and consuming REST APIs and OpenAPI specifications, and working with API gateways.
* Solid understanding of webhook and callback patterns, idempotency, retries, and failure handling.
* Working knowledge of encryption and secure data exchange.
* Infrastructure as Code with Terraform.
* CI/CD with GitHub Actions or an equivalent tool.
* Strong testing discipline (unit, integration, contract) and observability practices. Nice to Have
* Experience in payments or fintech, including PSP integrations, reconciliation, and PCI-DSS awareness.
* Knowledge of CDN and edge security (WAF, routing, security rules).
* Frontend skills (TypeScript, React or similar) for payment, redirect, or status-handling flows and internal tooling.
* Familiarity with regional payment methods and regulatory guidelines.
* Experience with event-driven architectures and microservices. xcskxlj
* Experience with monitoring tools such as Dynatrace, Splunk, Prometheus, or Grafana.

📌 Full Stack Engineer (Madrid)
🏢 Confidential
📍 Madrid