👋 Hi, I'm
Dinesh Sandilyan
Senior DevOps Engineer
Building reliable AWS infrastructure, automated deployments, and production systems that scale.
10
yrs_professionalYears Professional
4
certificationsCertifications
IaC
infrastructureInfrastructure
My DevOps Stack
Technologies I work with to build, deploy and maintain reliable infrastructure.
dinesh@devops:~$ infrastructure status
AWSONLINE
KubernetesHEALTHY
DockerRUNNING
CI/CDREADY
DatabaseCONNECTED
dinesh@devops:~$ █
dinesh@devops:~$ deploy --simulate
✓ Terraform plan
✓ Docker build
✓ ECS deployment
✓ Health checks
simulation: SUCCESS
dinesh@devops:~$ █
dinesh@devops:~$ monitoring --demo
CPU32%
Memory48%
Requests1.2k/min
StatusHEALTHY
dinesh@devops:~$ █
core_stack
Tools I work with daily
Production-proven tools across cloud, automation, containers, CI/CD, and observability.
Cloud
Infra as Code
Containers
CI / CD
Observability
Security & Net
career.log
Work experience
10 years of professional experience, including 6+ years in DevOps, across hybrid datacenters, on-premises, and AWS cloud-native environments.
Oct 2019 — Present · 6 yrs 9 mos
Senior DevOps Engineer
Sedin Technologies (RailsFactory) · Chennai
- Designed hybrid infrastructure across datacenter, on-premises, and AWS
- Automated provisioning with Terraform and Ansible at scale
- Managed containerized workloads with Docker and Amazon ECS
- Built centralized observability — Grafana, Prometheus, New Relic, CloudWatch
- Implemented AWS WAF dashboards and firewall-level security controls
- Reduced alert noise through systematic alert tuning and runbook automation
Aug 2018 — Sep 2019 · 1 yr 2 mos
Technical Support Engineer
Poornam Technologies · India
- Remote infrastructure support across Windows and Linux environments
- Server deployment, WDS configuration, enterprise network troubleshooting
- Maintained uptime and operational stability across production endpoints
Sep 2016 — Aug 2018 · 2 yrs
System Engineer
Fourth Dimension Solutions · Tamil Nadu
- Managed Linux/Windows servers, networking, Active Directory
- Application-level troubleshooting and infrastructure asset management
incident.response
Production Troubleshooting
Investigation areas across cloud infrastructure, delivery, containers, databases, and observability.
dinesh@devops:~$ troubleshoot --production
AWS infrastructure
PostgreSQL performance
RDS CPU and performance analysis
CI/CD pipeline failures
ECS and container issues
Monitoring and alerting
AWS WAF and security
Infrastructure automation
Production incident investigation
production_deployments
Featured DevOps Projects
Project case studies covering architecture, automation, deployment, and observability.
Kubernetes Autoscaling with EKS and KEDA
Automated horizontal pod scaling with EKS and KEDA configured using Prometheus
custom metrics queue thresholds.
Queue-based autoscaling
Prometheus metrics
Terraform
Case study
- Problem
- Scale Kubernetes pods using queue demand.
- Solution
- Use KEDA with Prometheus custom metrics and queue thresholds to drive horizontal pod scaling.
- Architecture
- Prometheus → KEDA → EKS node group / Auto Scaling Group.
- Implementation
- Configure queue thresholds and infrastructure with Terraform.
- Key challenge
- Connect queue metrics to Kubernetes scaling signals.
GitOps Argo CD Deployment
Declarative GitOps engine using ArgoCD, Helm chart templates, and HashiCorp Vault
secrets orchestration.
GitOps
Helm
Vault secrets orchestration
Case study
- Problem
- Keep an EKS cluster aligned with a Git-managed desired state.
- Solution
- Use Argo CD to sync declarative configuration, with Helm templates and Vault secrets orchestration.
- Architecture
- Git repository → webhook → Argo CD → EKS reconciliation.
- Implementation
- Define deployment configuration with Helm chart templates and coordinate secrets with Vault.
- Key challenge
- Keep cluster state and deployment configuration consistent while managing secrets.
Serverless Data Ingestion
Serverless API architecture using API Gateway, Lambda, and DynamoDB.
Serverless
Event ingestion
AWS managed services
Case study
- Problem
- Process incoming events through a serverless API flow.
- Solution
- Use API Gateway to invoke Lambda and store processed data in DynamoDB.
- Architecture
- API Gateway → Lambda → DynamoDB.
- Implementation
- The listed stack includes Terraform and CloudWatch alongside AWS Lambda.
- Key challenge
- Coordinate API request handling, serverless processing, and persistent storage.
verified_credentials
Certifications
AWS cloud operations and Cisco networking credentials.
AWS Certified Cloud Practitioner
Amazon Web Services
ACTIVE
AWS Certified SysOps Administrator – Associate
Amazon Web Services
ACTIVE
CCNA — Cisco Certified Network Associate
CCNA Routing & Switching
Cisco
COMPLETED
Training: Understanding Cisco Network Devices · Cisco · Level 200
blog.md
From the terminal
Real-world DevOps write-ups, tutorials, and deep-dives from production experience.
terraform · aws
Architecting a Production-Ready 3-Tier AWS Platform with Terraform
A complete engineering walkthrough of building an enterprise-grade 3-tier AWS infrastructure using modular Terraform, ECS Fargate, Multi-AZ RDS PostgreSQL, and GitHub Actions OIDC.
ci/cd · deployment
Rolling vs Blue-Green vs Canary: Choosing the Right Deployment Strategy
A deep-dive into zero-downtime deployment patterns, Kubernetes & AWS
implementations, traffic shifting, rollback speed, and database compatibility trade-offs.
snowflake · data
Configure a Snowflake Storage Integration to Access Amazon S3
A complete end-to-end guide to connecting Snowflake to S3 using IAM role trust — no
long-lived credentials, just secure STS token assumption and Snowpipe automation.
ci/cd
GitHub Actions vs Jenkins: Choosing the Right CI/CD Tool
A practical side-by-side comparison of GitHub Actions and Jenkins covering
architecture, pipeline examples, OIDC secrets, matrix builds, and cost analysis.
observability
Prometheus Architecture Explained: Server, TSDB, Exporters, and Alertmanager
Animated architecture walkthrough covering Prometheus Server, TSDB, Exporters,
Service Discovery, Pushgateway, Client Libraries, AlertManager, and PromQL.
terraform
Terraform State Management Best Practices: S3 Backend + DynamoDB Lock
Configure a production-safe remote state backend with S3 versioning, KMS encryption,
DynamoDB state locking, workspace isolation, and CI/CD partial backend config.
aws
DevOps Cost Optimization Checklist: 30 Checks Across Compute, Storage, and Observability
A comprehensive FinOps checklist covering Kubernetes rightsizing, Spot instances,
log bloat, data transfer, database optimization, CI/CD runner costs, and tagging strategy.
terraform
Provision your first AWS VPC with Terraform in 10 minutes
A step-by-step walkthrough of writing your first Terraform module — from init to
apply, with real reusable code.
observability
Why your Grafana dashboards are lying to you
Common Prometheus scrape mistakes that silently corrupt your dashboards. Lessons
learned from real production incidents.
bash-scripting
Automated Disk Space Alerts: A Production-Ready Bash Script
An advanced, production-grade shell script to monitor disk usage, exclude virtual
mounts, and alert Slack or Teams.
aws
Using AWS ECS Spot Capacity Providers with Terraform
A practical guide to running workloads on Spot with ECS capacity providers and
handling spot termination warnings.
linux
Mastering Linux Performance: A DevOps Guide to CPU, Memory, and I/O
A structured troubleshooting framework to diagnose server bottlenecks under pressure
using standard system tools.
ssl-monitoring
SSL Certificate Monitoring: Prevent Outages Before They Happen
How to track certificate expiration dates using Bash/OpenSSL scripts and Prometheus
Blackbox Exporter configuration.
aws
Amazon S3 Cross-Account Access: A Practical DevOps Guide
A step-by-step guide to configuring secure, multi-account S3 bucket access using
Bucket Policies, IAM Role assumption, and Terraform.
networking
From DNS to CDNs: Demystifying Modern Web Infrastructure
How requests traverse DNS root servers, establish TCP/TLS sessions, fetch assets at
edge CDNs, and route via reverse proxies.
nginx
Demystifying Nginx: Web Server, Reverse Proxy, Load Balancer, and Caching
The four critical roles Nginx plays in scaling application workloads, terminating
SSL, distributing connections, and caching assets.
aws
AWS IAM Roles vs IAM Users: When to Use Each
A security deep dive comparing AWS users and roles, explaining temporary security
credentials, trust policies, and best practices.
observability
AWS CloudTrail + CloudWatch Logs: Continuous Audit Setup
Build a real-time security logging pipeline to stream API actions to CloudWatch Logs
and trigger alerts via Terraform.
aws
AWS Cost Optimization Checklist for Small Teams
An actionable checklist to clean up detached storage, release unattached IPs,
automate dev environment schedules, and cut your AWS bill.