Casey W. Manion

Staff Full-Stack Software Engineer

Professional Summary

Staff Full-Stack Software Engineer with 20+ years architecting and migrating high-traffic full-stack applications in retail, real-estate, manufacturing, and automation. Deep expertise in React/Redux migrations from Angular, enterprise Google Tag Manager deployments, PHP/Zend, Ruby on Rails, and SCADA/SAP integrations. Proven at delivering 40%+ performance gains, regulatory compliance at scale, and leading distributed teams.

Core Skills

Professional Experience

Staff Software Engineer

Sam’s Club (Walmart Inc.) – Sunnyvale, CA (Remote)
2015 – 2025
  • Led multi-year Angular to React/Redux/Electrode migration for samsclub.com; owned checkout flow, authentication, and core services that powered final rollout impacting $1B+ annual e-commerce revenue
  • Designed and owned enterprise-wide Google Tag Manager rollout (100+ tags) plus CCPA opt-out flows serving 50M+ members — delivered ahead of Jan 2020 deadline
  • Improved marketing attribution accuracy 25% via analytics validation and real-time A/B testing
  • Cut page-load times 40% across mobile & desktop with zero downtime during parallel run

Senior Software Engineer

Trulia (Zillow Group) – Seattle, WA (Remote)
2012 – 2015
  • Converted legacy Marketing Center to multi-page Angular SPA, increasing agent adoption 30%
  • Rebuilt Silverlight media editor as cross-browser HTML5/Angular app, cutting dev time 50%

Software Engineer III

PV Powered (Advanced Energy) – Bend, OR (Hybrid)
2011 – 2012
  • Built and led Ruby/Sinatra API + Rails portal for global solar inverter monitoring
  • Created internal Backbone/Highcharts dashboard that reduced issue resolution time 40%

Senior Software Engineer & Earlier Roles

BlueMoon Ventures, Pike Street Industries, GEA Automation, Coca-Cola, Tektronix, and others
1999 – 2011
  • Designed reporting systems, Zend migrations, Bing Maps integrations, SCADA/Wonderware automation, SAP interfaces
  • Consistently delivered 30–70% efficiency gains through modular code and automation

Education

B.S. Computer Science, summa cum laude – Oregon State University
B.S. Chemical Engineering, magna cum laude – Oregon State University