# Christopher Miller > Staff Infrastructure Engineer Location: New York, New York, United States Profile: https://flows.cv/christophermiller1 Cloud Infrastructure/Platform Engineer interested in building tools and scalable cloud infrastructure for purpose driven development teams. Professional experience Developing and Operating tools and Platforms for Development teams with hundreds of Developers. Strong believer in the value of a DevOps culture. Lifelong learner and teacher with deep curiosity for all things related to Software and Infrastructure. If I don’t know how to do something today, I strive to be able to tomorrow. ## Work Experience ### Staff Infrastructure Engineer @ Ramp Jan 2025 – Present | New York City Metropolitan Area ### Lead Site Reliability Engineer @ Klaviyo Jan 2022 – Jan 2025 | Greater Boston Lead Engineer on SRE Paved Path Team (April 2025 - Current) • Co-owned and managed the Klaviyo Developer Platform (Kubernetes, Prometheus, ArgoCD, Istio), housing 700+ Argo Applications, enforcing standards and enabling self-service onboarding. Lead Engineer for Web Infrastructure & Gateway Team (2024-2025) • Proposed, planned, and implemented an API Gateway (Kong) to replace legacy Nginx proxies • Scaled Web Servers 7x (from 13k rps to 91k rps) over 5 years, eliminating overload-induced full site outages and growing backend service count from 5 to 44. • Established BFCM capacity planning methodology for web servers, ensuring BFCM success annually Lead Engineer for Platform Services SRE Team (2022-2024) • Developed the Klaviyo Messaging System (KMS): an async Python Task Execution framework (Chariot) that publishes to Apache Pulsar on AWS EKS, replacing dozens of legacy message brokers. • Helped scale KMS to >392k rps across >4k topics while establishing 99.995% 30-day success rate SLO. • Planned and orchestrated 2 separate Aurora MySQL Major Version upgrades on Klaviyo’s most availability sensitive database with 0 customer impact using custom Blue/Green tooling. • Grew team from 3 to 7 engineers, providing mentorship and prioritizing technical work. ### Senior Site Reliability Engineer @ Klaviyo Jan 2020 – Jan 2022 | Greater Boston Area ### Senior Site Reliability Engineer @ QuantumBlack Jan 2018 – Jan 2020 | Cambridge, MA • Designed, built, and operated the full stack of an internal Data Science Workspace management platform. • Wrote Terraform defining secure Data Science workspaces using AWS, Okta, Vault, and Jupyterhub. • Tested infrastructure using Kitchen and InSpec in CircleCI CI/CD pipelines. • Adhered to immutable infrastructure principals for AMI deployments. • Managed lifecycle of thousands of workspaces in multiple environments with custom Python service. • Wrote Serverless API in Python with AWS Lambda + API Gateway. • Wrote custom Terraform provider for Box using Golang, including tests and CI/CD. • Introduced security tooling and best practices for AWS accounts, and remediated security concerns. • Mentored other engineers through code and design reviews and performed interim scrum master responsibilities for distributed team. ### Senior Member Technical Staff DevOps/Cloud Engineering @ athenahealth Jan 2017 – Jan 2018 | Greater Boston Area • Wrote CloudFormation templates and automation in Bash, Python, Packer, and Ruby to provision and manage over 120 distinct AWS accounts. • Started with 4 central AWS accounts and scaled up to 120 decentralized accounts over 3 months. • Wrote and distributed standard templates and configurations for VPCs, AMIs, IAM resources, CloudTrail logging, Route 53 domains, EC2 resources, S3 buckets, Lambda functions, and AWS Config rules in all 120+ accounts. • Coordinated with Network Engineers to automate VPC & VPN provisioning for over 200 VPCs. • Built and operated DC/OS clusters in AWS used by 100+ developers to run dozens of services with over 1000 individual concurrent tasks. • Participated in SOX audits of AWS infrastructure and maintained a HIPAA compliant AWS environment. • Provided support, education, and consulting on implementations of AWS, DC/OS, and Docker. • Implemented Single Sign On strategy for AWS accounts, replacing 150+ handmade IAM users. • Packaged and distributed SSO login utility script written in Python for AWS CLI and API users. ### DevOps Engineer II @ AppNexus Jan 2014 – Jan 2016 | Greater New York City Area Developed and maintained internal tools and infrastructure software which enable AppNexus Engineers to do their most effective work within our Cloud Infrastructure in both Production and Test. My work addressed all manner of problems common to a mid-size Service Oriented Software Engineering organizations: from Development Environment Setup, to Testing and CI Infrastructure, to Deployment Automation. Most of our DevOps stack has been written in Python (2.7), with some components written in PHP, NodeJS, and front-end Javascript (JQuery, React). Was an active contributor to the engineering and ongoing operation of the Autoenv system, which automatically constructs and provisions expendable Prod-Like, Docker-driven Test Environments. This system has become a staple of AppNexus Engineering culture, and has helped foster an increased culture of integration and regression testing at AppNexus. Owned and administered AppNexus's internal Jenkins CI cluster, and consult with Engineering teams how best to leverage Jenkins for their CI/CD and Testing pipelines. This system is central to testing, and Continuous Integration efforts across most teams.The Cluster includes ~95 Worker Nodes, 1 Master, and nearly 1 Thousand distinct jobs. Technologies used regularly at AppNexus include Python (2.7), Docker, Bash, Unix, Jenkins, Puppet, vim, Git, NGinX, Apache, NodeJS. ### Customer Service Representative @ University of Rochester IT Services Jan 2012 – Jan 2014 | Rochester, New York Area Provided students, faculty, and staff with IT help and services at the University. Daily interaction with customers on the phone and in person makes use of and strengthens interpersonal skills, while trouble shooting IT issues strengthens technical ones. ### Mobile and Web Development Intern @ University of Rochester IT Services Jan 2011 – Jan 2012 Primary developer of Mobile iOS and Web application, Quip, intended to be a photo sharing and networking application for University of Rochester students and alumni. Experience with a variety of programming languages such as Java, Ruby, Objective C, PHP, JavaScript, etc. Experience with SVN repositories, UNIX systems, and rudimentary software engineering practices. ### DevOps Intern @ AppNexus Jan 2013 – Jan 2013 | New York, New York ### Research Assistant @ University of Rochester Computer Science Jan 2011 – Jan 2013 Worked in the Roc HCI lab with Prof. Jeffrey Bigham and Ph.D. student Walter Lasecki on Legion:Scribe, a system that uses crowdsourcing to enable real-time audio transcription of course lectures and similar domains. Gained experience with research methods, system building and testing, and academic publication authorship. ### General Customer Service Representative @ Area 51 Entertainment Jan 2010 – Jan 2010 | Roswell, Georgia Assisted customers in a variety of capacities including ushering the theaters, working the cash register, and marshaling the miniature golf course. Constantly honed customer service and communications skills. ## Education ### Master of Science - MS in Computer Science Georgia Institute of Technology ### Bachelor of Science (B.S.) in Computer Science University of Rochester ### AIT-Budapest ### Roswell HS ## Contact & Social - LinkedIn: https://linkedin.com/in/cmill32 --- Source: https://flows.cv/christophermiller1 JSON Resume: https://flows.cv/christophermiller1/resume.json Last updated: 2026-04-07