Senior Software Engineer – Backend, API Engineering

Stellenbeschreibung:

Design and implement Java 21 / Spring Boot microservices on Cloud Run for licensing, applications and renewals, case management, payments, documents, and notifications
Own the platform API surface; specify it in OpenAPI, maintain stable contracts for mobile, frontend, and integration teams, and version changes without breaking consumers
Implement PostgreSQL (AlloyDB) persistence, including row-level data isolation, search indexing, and migration strategy
Build asynchronous event flows on Pub/Sub and Eventarc and publish domain events for other services and the integration layer
Implement scheduled and timer-driven processing with Cloud Tasks and Cloud Scheduler, including renewal reminders, expiration sweeps, and reconciliation
Implement authentication and authorization across the API surface, including public applicant access and internal staff roles
Implement payment flows, including hosted payment page integration and settlement reconciliation
Meet platform security and compliance requirements for encryption, auditability, and data isolation
Deliver unit and integration test coverage, participate in code reviews, and support CI/CD deployment of owned services
Work closely with the client technical lead, integration engineers, mobile engineers, and frontend engineers from initial definition through final delivery

Requirements

8+ years of professional backend engineering experience with Java and Spring Boot
Production delivery experience on Google Cloud Platform
Bachelor's degree in Computer Science or equivalent practical experience
Java 21 and Spring Boot 3.x microservice development
API design and ownership: REST, OpenAPI specification, versioning, pagination, error contracts, backward compatibility
PostgreSQL, including schema design, indexing, query tuning, and versioned migrations
GCP serverless services: Cloud Run, Pub/Sub, Cloud Tasks, Cloud Scheduler
Event-driven architecture and messaging patterns (idempotency, retries, dead-letter handling)
API security with OAuth 2.0 / OIDC and JWT, including role- and attribute-based authorization
Automated testing (JUnit, integration tests) and CI/CD
Observability of owned services: structured logging, metrics, tracing, SLOs
Building APIs consumed by external partners, agencies, or public-facing applications
AlloyDB, BigQuery
Payment processing integrations and settlement reconciliation
GraphQL or gRPC alongside REST
Performance and load testing of high-traffic public services
Google Cloud Professional certifications

Core Competencies

Demonstrates expertise in designing and implementing Java 21 and Spring Boot microservices on Google Cloud Platform, with a strong focus on API design, database management, and security compliance. Proficient in building event-driven architectures and ensuring observability and automated testing for high-traffic public services.