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

Senior Software Engineer (Backend / Integrations)We are seeking a highly skilled and experienced Senior Software Engineer (Backend / Integrations) to join a contractor program supporting a critical customer engagement: a state government professional licensing and regulatory compliance platform built on Google Cloud. This role is ideal for a senior backend engineer with deep Java experience who builds event-driven microservices and has integrated with external systems over REST, SOAP, and SFTP. The successful candidate will build core platform services and the external integration layer, working closely with the client technical lead, the mobile and frontend engineers, and customer stakeholders to ensure project success from initial definition through final delivery.Expected start date: 5 October 2026.Required credentials:8+ years of professional backend engineering experience with Java and Spring BootProduction delivery experience on Google Cloud PlatformBachelor's degree in Computer Science or equivalent practical experienceRequired qualifications:Java 21 and Spring Boot 3.x microservice developmentPostgreSQL, including schema design, indexing, and versioned migrationsGCP serverless services: Cloud Run, Pub/Sub, Cloud Tasks, Cloud Workflows, Cloud SchedulerEvent-driven architecture and messaging patterns (idempotency, retries, dead-letter handling)External system integration over REST, SOAP, SFTP, and webhooksAPI security with OAuth 2.0 / OIDC and JWTAutomated testing (JUnit, integration tests) and CI/CDUseful qualifications:Workflow engines (Flowable, BPMN) and business rules enginesAlloyDB, BigQueryPayment processing integrationsExperience in government or regulated environments (FIPS, CJIS, HIPAA)Google Cloud Professional certificationsScope and solution expectations:Below covers the scope of work we anticipate the contractor supporting throughout the project timeline.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 indexingBuild asynchronous event flows on Pub/Sub and EventarcImplement scheduled and timer-driven processing with Cloud Tasks and Cloud Scheduler (renewal reminders, expiration sweeps, reconciliation)Author Cloud Workflows orchestrations for multi-service pipelinesBuild integrations with external state and federal systems over REST, SOAP, SFTP, and webhooksImplement payment flows, including hosted payment page integration and settlement reconciliationMeet platform security and compliance requirements for encryption and data isolationDeliver unit and integration test coverage, participate in code reviews, and support CI/CD deployment of owned services