Sr. Software Engineer – Backend Engineering (Core) / Integrations

Ontrac Solutions is seeking a Senior Software Engineer to support a state government professional licensing and regulatory compliance platform built on Google Cloud. The role focuses on developing Java and Spring Boot backend microservices, building event-driven services, integrating with external systems, implementing payment and workflow capabilities, and supporting security, testing, and CI/CD delivery.

Responsibilities:

• Design and implement Java 21 / Spring Boot microservices on Cloud Run (licensing, case management, payments, documents, notifications)
• Implement PostgreSQL (AlloyDB) persistence, including row-level data isolation and search indexing
• Build asynchronous event flows on Pub/Sub and Eventarc
• Implement scheduled and timer-driven processing with Cloud Tasks and Cloud Scheduler (renewal reminders, expiration sweeps, reconciliation)
• Author Cloud Workflows orchestrations for multi-service pipelines
• Build integrations with external state and federal systems over REST, SOAP, SFTP, and webhooks
• Implement payment flows, including hosted payment page integration and settlement reconciliation
• Meet platform security and compliance requirements for encryption and data isolation
• Deliver unit and integration test coverage, participate in code reviews, and support CI/CD deployment of owned services

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
• PostgreSQL, including schema design, indexing, and versioned migrations
• GCP serverless services: Cloud Run, Pub/Sub, Cloud Tasks, Cloud Workflows, Cloud Scheduler
• Event-driven architecture and messaging patterns (idempotency, retries, dead-letter handling)
• External system integration over REST, SOAP, SFTP, and webhooks
• API security with OAuth 2.0 / OIDC and JWT
• Automated testing (JUnit, integration tests) and CI/CD
• Workflow engines (Flowable, BPMN) and business rules engines
• AlloyDB, BigQuery
• Payment processing integrations
• Experience in government or regulated environments (FIPS, CJIS, HIPAA)
• Google Cloud Professional certifications