Open to opportunities

James Yun

@jamesyun

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Principal SRE driving cloud-native reliability, security, and automation.

United States

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What I'm looking for

I seek a role where I can lead platform reliability and automation initiatives, drive cloud-native architecture, mentor teams, and improve observability and security while delivering measurable cost and reliability improvements.

I am a Principal Site Reliability Engineer with 9+ years building cloud-native, production-grade SRE and DevOps platforms across AWS and GCP, delivering highly available and secure deployment pipelines.

I architect multi-account AWS and multi-project GCP topologies, design multi-cluster Kubernetes platforms, and implement GitOps and CI/CD with Argo CD, GitLab CI, and Jenkins. I lead observability, service mesh, secrets management, and infrastructure-as-code initiatives that reduced incident recurrence and optimized costs.

I partner with application teams to enforce best practices—SLO/SLI, automated runbooks, security hardening, and cost optimization—while coaching teams on operating models, progressive delivery, and platform adoption to scale reliable operations.

Experience

Work history, roles, and key accomplishments

Current

Principal Site Reliability Engineer

Current

Capgemini

Sep 2022 - Present (4 years 1 month)

Architected multi-account AWS and multi-project GCP SRE platform and led rollout of multi-cluster Kubernetes/OpenShift with GitOps, reducing incident recurrence and improving deployment reliability. Implemented IaC, observability, service mesh, secrets management, and cost-optimization practices across production environments.

AWS GCP Kubernetes Terraform Istio Prometheus Vault Ansible

Software Engineer

CyberCoders

May 2019 - Aug 2022 (3 years 3 months)

Operated Kubernetes clusters on AWS/GCP and built CI/CD pipelines, Terraform modules, and centralized logging/monitoring to improve observability and reduce MTTR. Integrated Vault for secrets and automated image and configuration provisioning.

Kubernetes Terraform Helm Jenkins ELK Stack Prometheus Vault Packer Ansible

Software Developer

Upgrow

Feb 2016 - Apr 2019 (3 years 2 months)

Supported Linux hosts and Docker onboarding, maintained ELK logging pipelines, and helped provision AWS environments with CloudFormation/Terraform while automating tasks with Ansible to speed environment provisioning.

Linux Docker Jenkins ELK Stack Ansible CloudFormation Terraform Prometheus PostgreSQL

Education

Degrees, certifications, and relevant coursework

University of Southern California

Bachelor of Science, Computer Science

2017 - 2019

Completed a Bachelor’s Degree in Computer Science, focusing on software engineering fundamentals and systems relevant to cloud and distributed platforms.

Pasadena City College

Associate of Science, Computer Science

2014 - 2017

Completed an Associate’s Degree in Computer Science with coursework supporting fundamentals in programming and systems prior to transfer to a four-year program.