Jerin

Hello, I'm Jerin Rathnam

Senior DevOps Engineer | Platform & Cloud Infrastructure

I design scalable, secure, and highly available cloud infrastructure. 4+ years building platforms on AWS and GCP, reducing costs and improving reliability.

View Projects Contact Me
Portrait of Jerin Rathnam

About

Cloud infrastructure that just works

I'm a DevOps Engineer with 4+ years of experience designing scalable, secure, and highly available cloud infrastructure across AWS and GCP environments.

I specialize in Kubernetes (EKS/GKE), Terraform, CI/CD automation, observability, and cloud security. I've managed production-grade microservices and AI workloads, improved deployment reliability, reduced infrastructure costs, and implemented zero-downtime deployment strategies.

AWS Certified Solutions Architect and HashiCorp Terraform Associate.

Key Achievements

  • 30%cloud cost reduction via VPC endpoint optimization
  • 18production EKS clusters managed
  • 70%deployment time reduction through reusable Terraform modules
  • 14kauthentication tokens recovered during production incident

Skills

Tools and technologies I work with

Cloud Platforms

AWS GCP Azure

Container & Orchestration

Kubernetes Docker Helm Argo CD EKS GKE

Infrastructure as Code

Terraform CloudFormation Ansible

CI/CD & Automation

GitLab CI/CD Azure DevOps AWS CodePipeline GitHub Actions

Monitoring & Observability

Prometheus Grafana AWS CloudWatch OpenSearch Signoz

Security & Compliance

HashiCorp Vault AWS IAM AWS Secrets Manager AWS WAF

Networking

AWS VPC ALB/NLB Client VPN

Scripting

Python Node.js Bash

Experience

Where I've worked

DevOps Engineer

Nielsen Media

July 2024 - Present
  • • Managed 18 production EKS clusters supporting multiple applications as part of a 2-person platform engineering team.
  • • Migrated 40+ Node.js Lambda functions to ExpressJS services on EC2 Auto Scaling Groups, improving scalability and reducing cold-start latency.
  • • Centralized application logging into AWS OpenSearch to improve observability and incident troubleshooting.
  • • Reduced infrastructure costs by 30% by implementing VPC private endpoints for Kinesis and Firehose workloads.
  • • Led recovery of 14k authentication tokens from DynamoDB during a production incident using Python automation and Athena queries.

DevOps Engineer

EasyDeploy Technologies

June 2022 - July 2024
  • • Reduced deployment time by 70% and Terraform code duplication by 50% through reusable infrastructure modules.
  • • Architected highly available cloud environments using ECS/Fargate, RDS, ALB/NLB, Lambda, and API Gateway.
  • • Deployed and managed Kubernetes platforms on EKS and GKE using Helm charts for Prometheus, Grafana, Thanos, and ingress.
  • • Engineered HashiCorp Vault infrastructure for centralized secrets management and automated credential rotation.

AWS DevOps Engineer

Freelancer

April 2021 - April 2022
  • • Developed Terraform and CloudFormation templates for automated AWS infrastructure provisioning across multiple client environments.
  • • Built Prometheus and Grafana monitoring platforms for infrastructure observability and alerting.
  • • Managed EC2 configuration automation using Ansible for persistent infrastructure consistency.

Projects

Selected work

AWS Multi-Account Architecture with Blue/Green Deployment

Designed and implemented a secure, scalable multi-account AWS architecture using Control Tower and Organizations, supporting blue/green deployments.

AWS Control TowerAWS OrganizationsECS FargateAurora PostgreSQLCloudFront
  • ✓ Globally distributed Aurora PostgreSQL with cross-region failover
  • ✓ AWS Cognito authentication for secure mobile backend
Read case study →

Managing 18 Production EKS Clusters

Sole-owner platform for 18 production EKS clusters supporting multiple applications across environments, with zero-downtime AI and microservices workloads.

EKSKubernetesHelmArgo CDAWS OpenSearch
  • ✓ 18 production EKS clusters managed by a 2-person team
  • ✓ Zero-downtime rolling deployments for AI workloads
Read case study →

Lambda to ExpressJS on EC2 Auto Scaling

Migrated 40+ Node.js Lambda functions to ExpressJS services on EC2 Auto Scaling Groups to improve scalability and reduce cold-start latency.

AWS LambdaEC2Auto Scaling GroupsExpressJSNode.js
  • ✓ 40+ Lambda functions migrated to long-running ExpressJS services
  • ✓ Reduced cold-start latency for latency-sensitive APIs
Read case study →

30% Cost Reduction with VPC Private Endpoints

Replaced public egress for Kinesis and Firehose with VPC private endpoints, eliminating unnecessary NAT Gateway traffic.

AWS VPCKinesisFirehoseNAT GatewayTerraform
  • ✓ 30% reduction in overall cloud infrastructure costs
  • ✓ Lower latency for AWS service traffic
Read case study →

Blog

Recent writing

Contact

Let's work together

Open to DevOps, platform engineering, and SRE opportunities.

Email Me LinkedIn