L2 Technical Support Leader; Integration & Middleware

Responsibilities

• Strategic Technical Leadership
• End-to-End Traceability:
  Lead the team in tracing transaction flows from the API Gateway, API Connect, through the Enterprise Service Bus (ACE) to the backend Microservices (Spring Boot).
• Root Cause Analysis (RCA):
  Spearhead deep-dive investigations into middleware failures such as message losses in MQ, synchronization errors in ACE, or JVM crashes in Spring Boot.
• Platform Governance:
  Oversee the stability of integration components running on Red Hat Open Shift, ensuring optimal CPU, Memory allocation, and pod scaling.
• Security Enforcement:
  Manage and troubleshoot security protocols including Mutual TLS (mTLS), OAuth2 and JWE/JWS within the integration layer.

• A. IBM Cloud Pak for Integration (CP4I)
• App Connect Enterprise (ACE):
  Troubleshoot message flows, ESQL logic errors, adapter connectivity issues (SAP, Database, File).
• IBM MQ:
  Manage queue managers, resolve channel retries, investigate dead-letter queues or message persistence issues.
• API Connect:
  Resolve issues related to API definitions, security policies, and Gateway/Data Power latency.
• B. Backend Microservices (Spring Boot)
• Performance Tuning:
  Analyze JVM thread dumps and heap dumps to resolve memory leaks or high CPU utilization in microservices.
• Connectivity Debugging:
  Troubleshoot Spring Boot integration with databases (JPA, Hibernate) and external messaging systems (JMS, Kafka).
• Log Aggregation:
  Utilize ELK & Splunk to correlate logs across multiple microservices to identify points of failure in a distributed architecture.

• Integration Platforms:
  Mastery of IBM CP4I, specifically ACE, MQ, and API Connect.
• Development Frameworks:
  Advanced knowledge of Java, Spring Boot, Spring Integration, Spring Cloud.
• Containerization:
  Expert-level proficiency in Red Hat Open Shift and Kubernetes.
• Protocols & Standards:
  Expert understanding of REST, SOAP, JSON, XML, AMQP, and MQTT.
• Monitoring Tools:
  Hands‑on experience with IBM Instana, Dynatrace, Prometheus, Grafana.