• Design and implement secure integration interfaces (RESTful APIs, SOAP, message queues, file-based) connecting vendor applications with client data systems • Develop data orchestration workflows using AWS services (Lambda, Step Functions, EventBridge, SQS/SNS) • Use VA-endorsed interoperability standards including FHIR R4, CDS Hooks, and SMART on FHIR • Build error handling, retry logic, and dead-letter queue patterns for distributed system reliability • Implement data transformation and validation logic to reconcile disparate source system formats • Create reusable integration patterns and libraries for scaling to 130+ system instances • Work with vendor-supplied containers to understand integration points and API requirements • Design and implement fault-tolerant integration patterns with automatic retry, circuit breaker, and graceful degradation strategies • Build multi-AZ deployment architectures ensuring integration availability during infrastructure failures • Develop idempotent APIs and workflows to handle duplicate processing and enable safe retries • Implement health checks, readiness probes, and self-healing mechanisms for integration endpoints • Create disaster recovery procedures including backup strategies, failover mechanisms, and recovery time objective (RTO) compliance • Design for horizontal scalability to handle variable workload demands across millions of client records • Implement secure integration patterns including encryption (at-rest and in-transit), authentication/authorization (OAuth, API keys, IAM roles), and input validation • Apply least-privilege IAM policies for cross-service and cross-account access • Implement audit logging and traceability for compliance requirements • Handle PII, PHI and other sensitive client data according to federal data protection standards • Support RMF/ATO process by documenting security controls and providing evidence for assessment • Develop comprehensive integration test suites (unit, integration, end-to-end) • Create test data sets and mocking strategies for isolated component testing • Perform load and performance testing on integration endpoints • Support security testing and vulnerability remediation activities • Document test plans, test cases, and test results for compliance review • Build serverless integration workflows using Lambda functions and Step Functions state machines • Configure API Gateway for RESTful endpoint exposure with throttling and authorization • Implement event-driven architectures using EventBridge, SNS, and SQS • Manage secrets and configuration using Secrets Manager and Parameter Store • Monitor integration health using CloudWatch metrics, logs, and alarms • Deploy infrastructure-as-code using AWS SAM, CloudFormation, or Terraform