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Shawn (Dakota) Stier (Xephyr)
Mid-Level Software Engineer specializing in React front-end and web APIs
Roanoke, VAFront-end software engineer7 years experienceMid-LevelSoftwareWeb DevelopmentTelecommunications
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About
Backend-leaning full-stack engineer from Valcom who maintained Django/PostgreSQL services for mass-notification/paging servers used by education/commercial/government customers. Notable for hardening authentication and reliability (JWT refresh + rotation tokens, WebSockets/EventStream) and for modernizing a legacy Ext.js/PHP stack into a React + Django architecture with strong CI/testing and production incident ownership.
Experience
Front-end software engineerValcom, Inc
Full-stack developerEnquist Enterprises
Website contractingSelf-Employed
Education
Virginia Techbachelor, Computer Science
Virginia Western Community Collegeassociate, Computer Science (2020)
Key Strengths
- Built and stabilized JWT auth flows (refresh + rotation tokens) to reduce 401s and sync issues
- Diagnosed and mitigated production performance incidents caused by runaway client retries (prevented log/CPU flooding)
- Improved automated test coverage for Django REST APIs using Pytest integrated with GitLab CI/CD
- Modernized legacy front-end from Ext.js to React SPA (hooks, Redux, React Router) with improved maintainability
- Strong debugging/triage using system logs (Nginx/Apache), CI pipeline logs, and browser network tooling
- Designed PostgreSQL views/queries to offload computation from app layer and support sortable UI displays
- Disciplined engineering practices: narrow-scope commits, issue tracking, rapid patch releases, collaborative troubleshooting
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