# Charles Li

> Software Developer at ClassLink

Location: New York City Metropolitan Area, United States
Profile: https://flows.cv/charlesli

Stays informed on the latest in computer hardware and semiconductor technology. Looks forward to innovations in computing performance

## Work Experience
### Software Developer @ ClassLink
Jan 2022 – Present
• Continually maintain software, extend functionality, and resolve defects in ClassLink authentication services to ensure stability across 25 million unique logins per day
• Pragmatically assert architectural and development recommendations during technical planning phases of feature ideation and enhancement
• Regularly review code for implementation oversights, security vulnerabilities, performance optimizations, and software maintainability to meet product requirements and achieve quality standards
• Typescript | Angular | RxJS | Node.js | Javascript | HTML | CSS

Authentication
• Developed ClassLink's Angular Login Page supporting Active Directory, ADFS, Passkey, Google, Microsoft, and Email logins with MFA to upgrade over half of all clients from legacy jQuery login page
• Led refactor of ClassLink OAuth2 API with PKCE to enhance security during client authorization and align API behavior with standardized OAuth2 protocol, improving ClassLink SSO integration and developer experience for vendors
• Implemented frontend experience for account claiming system featuring multi-step UI with security question authentication, custom terms of service display, and password reset process, permitting users to obtain credentials for their newly-provisioned accounts
• Architected scalable and consumer-agnostic Multi-Factor Authentication system, introducing consistent MFA API consumption and UX across ClassLink web and mobile applications implementing SSO
• Integrated MFA through Duo Universal API with backwards compatibility to transition over 100,000 users from deprecated Duo Traditional API


## Education
### Bachelor of Science - BS in Computer Science
Rutgers University–New Brunswick


## Contact & Social
- LinkedIn: https://linkedin.com/in/charlesli404
- GitHub: https://github.com/ForeverACharles

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Source: https://flows.cv/charlesli
JSON Resume: https://flows.cv/charlesli/resume.json
Last updated: 2026-04-13