Job Description

1 Year Contract role

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Role: Kubernetes Manager

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Level: L3 / Senior Kubernetes Administration & Operations

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Primary Focus: Linux Administration, Kubernetes Administration, Production Operations, SRE, Monitoring, Security, Upgrades and Customer Escalation

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Mandatory Skills

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- CKA certification (Preferred)
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- Robust/deep knowledge of Linux administration and troubleshooting
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- Strong hands-on experience in Kubernetes administration and L3 troubleshooting
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- Knowledge on virtualization like vSphere, OpenStack, Ovirt , KVM
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- Production experience in Kubernetes cluster operations, incident management and troubleshooting
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- Strong knowledge of Kubernetes architecture, control plane, worker nodes, networking, storage and workloads
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- Ability to handle P1/P2/P3 incidents and customer escalations within SLA
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- Hands-on experience with Kubernetes upgrades, patching and maintenance
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- Strong understanding of container runtime technologies:
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- containerd
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- CRI-O
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- Docker
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- CRI
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- Experience with container registries, preferably Harbor
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Monitoring & Observability

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- Configure and administer Prometheus
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- Configure and manage Alert manager
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- Grafana dashboard creation and monitoring
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- Kubernetes cluster health monitoring
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- Alert investigation and resolution within SLA
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- Alert tuning and noise reduction
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- Identify duplicate/repeated alerts and optimize alert rules
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- Experience with ELK/EFK and Fluentd
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- Log collection, analysis and troubleshooting
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CI/CD & DevOps

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Hands-on experience with:

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- Jenkins
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- GitLab CI/CD
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- Git
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- Container image build and deployment
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- Kubernetes deployment automation
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- CI/CD troubleshooting
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Kubernetes Operations

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Responsible for:

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- Day-to-day Kubernetes cluster administration
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- L3 troubleshooting of Kubernetes issues
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- Kubernetes upgrade and patching activities
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- Cluster health checks
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- Node and pod troubleshooting
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- Control-plane and worker-node troubleshooting
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- Kubernetes networking troubleshooting
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- Kubernetes storage troubleshooting
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- Resource and performance analysis
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- Incident/problem management
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- Root Cause Analysis (RCA)
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- Vulnerability remediation
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- Production change implementation
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- Customer-specific Kubernetes requirements
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Security & Vulnerability Management

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- Kubernetes security best practices
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- Vulnerability identification and remediation
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- Container image vulnerability management
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- Registry security
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- Kubernetes RBAC
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- Network/security policy concepts
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- SSL/TLS certificate management
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- Experience with security tools such as Gatekeeper
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- Ability to coordinate vulnerability fixes across OS, Kubernetes and container layers
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Networking

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Strong understanding of:

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- DNS
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- TCP/IP and L3 networking
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- Load Balancers
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- SSL/TLS termination
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- Ingress
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- Kubernetes Services
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- Network troubleshooting
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- Ingress Controllers
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- Istio Gateway
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- Service Mesh concepts
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- NGINX
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- Kong API Gateway
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Storage

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Good understanding of Kubernetes storage and underlying infrastructure:

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- NFS / File storage
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- Block storage
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- Object storage
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- PV/PVC
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- Storage Class
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- CSI
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- Storage troubleshooting
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- Mount and I/O issues
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- Storage performance concepts
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Platform Components

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Working knowledge of:

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Component Required Knowledge

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Istio

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Service Mesh, Gateway, traffic management

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NGINX

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Ingress / reverse proxy

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Kong

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API Gateway

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Redis

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Cache / datastore

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PostgreSQL

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Database fundamentals & troubleshooting

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Kafka

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Messaging / event streaming

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RabbitMQ

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Message broker

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Keycloak

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IAM / authentication

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Gatekeeper

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Kubernetes policy enforcement

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Harbor

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Container registry

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Prometheus

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Monitoring

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Grafana

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Visualization

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Alertmanager

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Alert management

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ELK

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Centralized logging

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Fluentd

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Log collection

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Customer & Operations Responsibilities

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- Provide 24×7/on-call customer support as required
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- Handle customer escalations at OS and Kubernetes levels
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- Understand and resolve customer production issues
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- Participate in incident bridges and technical discussions
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- Perform RCA for critical incidents
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- Track and resolve tickets within defined SLA
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- Handle day-to-day customer requirements
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- Coordinate with development, compute, network, storage, security and application teams
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- Ensure production changes follow the approved change-management process
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- Prepare technical documentation and operational procedures
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📌 Manager (Tamil Nadu)
🏢 Tata Communications
📍 Tamil Nadu