Senior Principal Engineer - Applications Development

Company: Marsh Corporate Description: We are seeking a talented individual to join our Marsh Tech - TE2A (Enterprise Systems Engineering) team, part of our Marsh Tech business at Marsh. This role will be based in Pune/Noida. This is a hybrid role that has a requirement of working at least three days a week in the office.   Senior GCP Apigee X Administrator (API Platform & Network Engineering)   We are looking for an experienced GCP Apigee X professional with strong platform administration and cloud networking expertise to operate, secure, and scale our enterprise API management platform. The ideal candidate will own Apigee X organization and environment administration, hybrid runtime operations, network architecture and connectivity, platform security, and reliability — partnering closely with development, security, and network engineering teams across the full API platform lifecycle.   We will count on you to: Administer and maintain Apigee X organizations, environments, environment groups, and instances, including hybrid runtime components (message processors, routers, and Synchronizer) deployed on GKE. Own Apigee X platform operations: upgrades, patching, capacity planning, autoscaling, and maintenance windows with minimal service disruption. Configure and manage Cloud Load Balancing (external/internal HTTPS, TCP/SSL proxy) and Cloud DNS for Apigee endpoints and hybrid connectivity. Implement network security controls — firewall rules, Cloud Armor/WAF policies, VPC Service Controls — to protect API traffic and enforce zero-trust principles. Manage IAM, RBAC, and service accounts for Apigee orgs/environments and related GCP projects, following least-privilege and organization policy best practices. Administer TLS/mTLS certificates, keystores, and truststores, and manage credential/secret rotation for proxies and target endpoints. Monitor platform health, API traffic, and network performance using Cloud Monitoring, Cloud Logging, and Apigee Analytics; define SLOs/SLIs and alerting policies. Design and implement high-availability, multi-region deployment, and disaster recovery strategies for Apigee X. Troubleshoot connectivity, latency, DNS, and routing issues across Apigee, backend services, and hybrid/on-prem networks (VPN, Cloud Interconnect). Enforce API security policies in production — OAuth 2.0, JWT, mTLS, API key lifecycle, quota, and threat protection — in partnership with development teams. Manage and evolve CI/CD pipelines and Infrastructure-as-Code (Terraform preferred) for Apigee X configuration-as-code deployments. Collaborate with network engineering, security, and platform teams to align Apigee X deployments with enterprise network and security architecture. Maintain operational runbooks, network diagrams, and platform documentation; lead incident response and root-cause analysis for platform/network issues. Mentor engineers on Apigee X administration, GCP networking fundamentals, and platform…