Application Support Engineer

Job Summary We are seeking an experienced Application Support Engineer to support a large-scale Data Center Migration and Infrastructure Transformation initiative. The successful candidate will be responsible for application assessment, dependency analysis, migration planning, configuration validation, cutover support, post-migration stabilization, and stakeholder coordination. The role requires close collaboration with Application, Infrastructure, Network, Database, Storage, Security, and Business teams to ensure successful migration and operational readiness of critical banking applications. Key Responsibilities Governance, Planning & Readiness Application Assessment & Dependency Analysis Identify and analyze applications hosted in the Data Center environment. Categorize applications based on: Production and Disaster Recovery environments Business criticality levels Recovery Time Objective (RTO) Recovery Point Objective (RPO) Conduct comprehensive application dependency mapping: Upstream and downstream systems External integrations API interfaces MQ services Service gateways Shared application services Identify hardcoded dependencies including: IP addresses Hostnames VLAN configurations Firewall rules SSL/TLS certificate Compliance & Risk Management Ensure compliance with regulatory and security standards. Validate environment segregation requirements. Review application architecture against: Environment isolation standards Access control policies Audit requirements Logging and monitoring standards Perform application impact assessments. Identify risks associated with: Migration failures Data corruption Network latency Rollback complexity Single points of failure Design & Architecture Validation Network & Connectivity Review Review network architecture and connectivity requirements. Validate: IP addressing VLAN segmentation Network routing Firewall configurations Traffic flow requirements Assess connectivity between applications and integrated systems. Application Configuration Validation Review and update: Application configuration files Property files Connection strings API endpoints MQ channels and queues Identify and remediate hardcoded application configurations. Assess readiness for: IP changes Hostname changes DNS updates Non-Functional Readiness Validate application performance requirements. Assess: Availability Scalability Latency sensitivity Bandwidth requirements Verify High Availability (HA) and clustering configurations. Ensure readiness in the target infrastructure environment. Pre-Migration Preparation Environment Standardization Remove obsolete application configurations. Decommission unused services and components. Ensure environment consistency and readiness. Backup & Recovery Verify completion of full system and database backups. Validate backup restoration procedures. Confirm rollback and data retention strategies. Security & Certificate Management Validate SSL/TLS certificates. Coordinate certificate renewal and re-issuance activities. Review secrets management processes, keystores, and vault integrations. Migration & Cutover Support Change & Release Management Raise and manage change requests. Support Change Advisory Committee (CAC) processes. Prepare: Impact assessments Rollback plans Deployment procedures Coordinate migration activities with business and technical teams. Application Migration Execution Support application shutdown and startup activities. Perform configuration validation after migration. Coordinate with: Infrastructure Teams Database Teams Network Teams Storage Teams Security Teams Post-Migration Validation & Stabilization Functional Validation Execute application validation checklists. Verify: User authentication Transactions Batch processing Message queues External integrations Validate successful completion of business-critical processes. Disaster Recovery Validation Validate Disaster Recovery (DR) environments. Verify: Replication status Connectivity Recovery readiness Participate in DR drills and simulation exercises. Performance Monitoring Monitor: Application performance Error rates System throughput Network latency Support Hypercare activities and transition to BAU support Documentation & Knowledge Management Maintain and update: Application architecture diagrams Network topology diagrams Operational documents Runbooks Standard Operating Procedures (SOPs) Conduct knowledge transfer sessions for support teams. Update support documentation and FAQs. Stakeholder & Communication Management Serve as the Single Point of Contact (SPOC) for: Application Teams Infrastructure Teams Business Users Project Teams Provide regular updates on: Migration progress Risks and issues Cutover status Go-Live readiness Support audit, compliance, and evidence collection activities. Post-Implementation Review (PIR) Participate in Post-Implementation Review sessions. Document lessons learned and improvement opportunities. Support closure of change records. Recommend improvements in: Automation Configuration management Operational support processes Required Skills & Experience Application Support Application Support Production Support Incident Management Problem Management Change Management Release Management Root Cause Analysis (RCA) Infrastructure & Networking Data Center Migration Network Connectivity TCP/IP DNS VLANs Firewall Concepts Load Balancers High Availability (HA) Disaster Recovery (DR) Middleware & Integration APIs Message Queues (MQ) SOA Architecture Application Integrations Service Gateways Cloud & Platforms Windows Server Linux/Unix Cloud Infrastructure Application Hosting Platforms Security SSL/TLS Certificates Access Control Secrets Management Cybersecurity Best Practices