About the Author

John Ian Medilo is a Senior DevOps Engineer and SRE Architect with 15+ years of experience scaling infrastructure from physical data centers to multi-cloud platforms serving millions of users.

John Ian Medilo

Senior DevOps Engineer | SRE Architect | Lean Six Sigma Black Belt

15+ years building infrastructure, automating everything, and helping engineering teams ship faster with fewer incidents. From data center power and cooling to sub-millisecond trading systems to multi-cloud Kubernetes platforms.

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Professional Summary

I've spent the last 15 years at the intersection of infrastructure, automation, and software delivery — starting from racking servers in data centers and progressing to designing multi-cloud platforms that serve millions of users. My career spans high-frequency trading systems at NYSE Technologies, content delivery platforms at Samsung Research, and modern cloud-native architectures across multiple organizations.

The consistent thread: automate everything, measure obsessively, and build platforms that make teams self-sufficient. I specialize in reducing operational toil through infrastructure-as-code, implementing security as a first-class citizen in CI/CD pipelines, and designing observability systems that catch problems before users notice them.

Currently focused on platform engineering, FinOps optimization, and building internal developer platforms that reduce "time to first commit" from weeks to hours. My Lean Six Sigma Black Belt training means I approach every problem with a data-driven, process-improvement mindset — measuring baselines, implementing changes, and validating results.

Certifications

Experience Highlights

Samsung Research

Led the migration of 50+ microservices from legacy infrastructure to AWS EKS, implementing zero-hardcoded-secrets policies with HashiCorp Vault, and building automated provisioning pipelines that reduced developer onboarding from 4 days to 2 hours.

Mark Anthony Group

Drove Datadog automation initiative with Terraform, implemented FinOps tagging strategy across 15 AWS accounts, and deployed Policy-as-Code (OPA) for Kubernetes admission control — achieving 100% resource tagging compliance and 25% cloud cost reduction.

Data Center Infrastructure (Early Career)

Built data centers from the ground up — power distribution (PDU, UPS, generator), cooling (CRAC, hot/cold aisle containment), structured cabling (CAT6, fiber), and rack/stack of compute, storage, and network equipment. This foundational experience provides deep understanding of the full infrastructure stack that informs cloud architecture decisions today.

High-Frequency Trading Infrastructure (NYSE Technologies)

Designed and operated sub-millisecond latency trading infrastructure, including kernel-bypass networking (DPDK), FPGA-accelerated market data feeds, and co-located trading servers. Learned the discipline of performance measurement, capacity planning, and fault tolerance under extreme constraints.

Technical Proficiencies

Contact

How to Navigate This Wiki

This wiki contains 30+ pages across 8 sections covering the full spectrum of modern platform engineering, DevOps practices, and infrastructure automation.

Feedback and Contributions

This wiki is a living document. I welcome feedback, corrections, and suggestions for new content. If you find an error, want to request a topic, or have a question about any of the implementations shown here:

References