1 Year Contract role

Role: Kubernetes Manager

Level: L3 / Senior Kubernetes Administration & Operations

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

Mandatory Skills

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

Monitoring & Observability

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

CI/CD & DevOps Hands-on experience with:

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




- CI/CD troubleshooting

Kubernetes Operations

Responsible for

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

Security & Vulnerability Management

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

Networking

Solid understanding of

- DNS
- TCP/IP and L3 networking
- Load Balancers
- SSL/TLS termination
- Ingress
- Kubernetes Services
- Network troubleshooting
- Ingress Controllers




- Istio Gateway
- Service Mesh concepts
- NGINX
- Kong API Gateway

Storage Good understanding of Kubernetes storage and underlying infrastructure:

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

Platform Components

Working knowledge of

Component Required Knowledge

Istio

Service Mesh, Gateway, traffic management

NGINX

Ingress / reverse proxy

Kong

API Gateway

Redis

Cache / datastore

PostgreSQL

Database fundamentals & troubleshooting

Kafka

Messaging / event streaming

RabbitMQ

Message broker

Keycloak

IAM / authentication

Gatekeeper

Kubernetes policy enforcement

Harbor

Container registry

Prometheus

Monitoring

Grafana

Visualization

Alertmanager

Alert management

ELK

Centralized logging

Fluentd

Log collection

Customer & Operations Responsibilities

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

📌 Manager (Chennai)
🏢 Tata Communications
📍 Chennai