Role Summary
The Senior Backend Developer will implement backend services powering the Notification Hub, including routing logic, preference synchronization workflows, webhook ingestion components, and vendor adapter integrations. This role focuses on building highly reliable, event-driven microservices deployed on GKE using Pub/Sub and Avro.
Key Responsibilities
Develop Java/Spring Boot microservices for routing, preference sync, webhook ingestion, and batch jobs.
Implement Pub/Sub consumers with concurrency controls, retry logic, DLQ, and idempotency handling.
Process Avro payloads and implement schema validation, transformation, and enrichment.
Build API integrations with Listrak and other messaging/MarTech systems using the adapter pattern.
Integrate with internal APIs (MDM, CRM, profile services) for data enrichment.
Contribute to secure webhook handling and event publishing.
Implement resilience features: circuit breakers, exponential backoff, and message-level deduplication.
Participate in code reviews, performance tuning, and operational troubleshooting.
Required Skills & Experience
6–10 years backend engineering experience.
Strong expertise with Java, Spring Boot, REST APIs, and microservices.
Experience with event-driven platforms (Pub/Sub, Kafka, RabbitMQ, etc.).
Familiarity with Avro or schema-based messaging formats.
Experience with Kubernetes/GKE deployments.
Strong integration experience with external APIs.
Preferred
Experience in messaging platforms, ESP integrations, or customer engagement systems.
Knowledge of webhook design and security
Photon Interactive UK Limited is a technology company that develops API services, with particular expertise in payment gateway integration and secure data handling. The company operates in the fintech and payment processing sector, serving clients who require robust security and compliance with industry standards. They focus on building secure, compliant systems that meet rigorous standards such as PCI DSS and other security frameworks.
