# Warren Guan

> Infrastructure @ Attentive | Kubernetes, AWS

Location: San Francisco, California, United States
Profile: https://flows.cv/warrenguan

Experienced Lead Software Engineer with a focus on reliability engineering, backend development, and infrastructure with a deep understanding of the whole software development cycle, from developing applications from scratch to managing multiple Kubernetes clusters with 100+ nodes at scale.  Passionate in building scalable, secure, reliable infrastructure that enables teams to deliver consistent user experience that aligns with the company's vision and bottom line.

## Work Experience
### Senior Software Engineer - Infrastructure @ Attentive
Jan 2024 – Present | San Francisco Bay Area

### Technical Cofounder @ Fanfly
Jan 2023 – Present | San Francisco Bay Area
Connect with people through live music

### Senior Software Engineer - Infrastructure @ OpenSea
Jan 2021 – Jan 2023 | San Francisco Bay Area
- Managed and troubleshooted multiple Kubernetes clusters with 100+ nodes with ArgoCD and Terraform
- Reduced operating cost by thousands of $$ per month from inefficiencies in obversability
- Centralized all operating secrets to lower  engineering resources used to debug and maintain them.  Improved security posture as a result
- Enhanced autoscaling capabilities in K8s with customized data via KEDA integration
- Streamlined and audited all monitoring alerts across all teams, lowering false positives, flakiness, and on-call burnout

### Lead Software Engineer - Infrastructure @ PAX Labs, Inc.
Jan 2019 – Jan 2021 | San Francisco, California, United States
- Lead engineers and collaborated with multiple teams to migrate CI/CD to Cloudfoundry Concourse and lowered avg failure rates, test durations, and cost by replacing or caching heavy dependencies, rightsizing, and parallelizing workloads
- Mentored and provided guidance for other teams to follow the new standard and ways to improve build times and lower failures
- Managed Cloudfoundry to support a service oriented architecture with multiple tech stacks
- Collaborated with firmware team to deploy infrastructure to support signing firmware image with Cloud HSM

### Lead Software Engineer, Infrastructure @ Houzz
Jan 2014 – Jan 2019 | Palo Alto, CA
- Main author/maintainer of core infrastructure code with Saltstack that handles all infrastructure operations (deployments, configuration management, etc.)
- Mentored teams to use the same methodology to maintain consistency
- Authored and streamlined Jenkins CI pipeline to ensure provisioning consistency
- Prepared cost analysis and savings recommendations for executive meetings
- Identified/fixed performance bottlenecks and handled production incidents
- Lead cross team effort to introduce custom alerts and metrics with Nagios/Ganglia

### Founding Engineer @ Goodjoe, Inc.
Jan 2013 – Jan 2016 | San Francisco Bay Area
Full-stack development, maintenance, observability of http://www.goodjoe.com e-commerce website

### Lead Software Engineer / DevOps/ DBA @ iOffer
Jan 2006 – Jan 2014 | San Francisco Bay Area
Wore multiple hats and touched all parts of the stack.

As a lead software engineer:
- Lead weekly scrums and tracked project progress including:
  * Web scraper to scrape competitor listings
  * Integration with Chinese payments 99Bill and Alipay
  * Admin graphing tools to identify buying/selling trends
  * Automating DMCA takedowns and fraud detection
- Lead migration of legacy Java Struts application to Rails
- Deployed and troubleshooted with NewRelic

As a DevOps Eng:
- On call 24/7 for production issues using NewRelic
- Lead discussions and tracked progress around incident responses
- Managed releases with 100+ virtual servers via Capistrano and Puppet

As a MySQL DBA:
- Cached and optimized slow-running and resource-heavy db queries
- Optimized db relevancy and performance by maintaining separate hot/cold datasets
- Migrated database from MySQL to Clustrix with master-master setups
- Wrote custom scripts to help identify data inconsistencies, slave lag, etc.
- Wrote complex SQL queries required for in-house datalake
- Oversaw new schema designs while maintained data relevancy
- Physical management of server racks in a co-location

### Senior Software Engineer @ iOffer
Jan 2004 – Jan 2006 | San Francisco Bay Area
Wrote internal administrative tools in Java Struts to handle various areas of the website , including:
- Customer service
- Fraud Detection/Prevention
- Scraper tools for competitor websites

Helped manage and maintain a series of MySQL databases in a master-master setup with multiple replication slaves.

### Software Engineer @ OneBPO
Jan 2004 – Jan 2004
Responsible for designing, implementing, and testing new intranet web applications to facilitate and log tasks performed by the finance department.


## Education
### BS in Computer Science & Engineering
University of California, Davis

### Minor in Japanese
University of California, Davis

### Minor in Managerial Economics
University of California, Davis

### Ben Franklin MS


## Contact & Social
- LinkedIn: https://linkedin.com/in/warrenguan
- Website: http://www.ioffer.com
- Website: http://www.goodjoe.com

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Source: https://flows.cv/warrenguan
JSON Resume: https://flows.cv/warrenguan/resume.json
Last updated: 2026-04-01