Yifei Wang
Actively seeking a full-time SDE starting in 2026 | MS in Software Engineering @ UCI | Backend / Full-Stack Developer
- Role
- Software Engineer Internship at Office of Information Technology @ UC Irvine
- Location
- Irvine, CA, US
- LinkedIn followers
- 500 followers
About Yifei Wang
Actively seeking a full time Software Engineering role starting in 2026. I bring…
Experience
Software Engineer Internship
Office of Information Technology @ UC Irvine
Jul 2025 — Present · Irvine, CA, US
Order Management System: Developed ongoing order management Spring Boot APIs handling subscription lifecycle tracking, implementing multi-status order processing with complex data aggregation across 8+ database tables and dynamic order action resolution for cancellations, returns, and refunds. Real-time Notification Service: Developed real-time user notification service using Redis message queuing and RPC-based APIs; implemented event-driven workflows for order state changes, achieving 99.5% delivery success rate and securing internal API access with JWT-based authentication. Third-party Integration: Implemented OAuth2 authorization flows with PKCE enhancements for integrating Stripe Connect, enabling secure third-party billing and reducing manual reconciliation workload by 85%. API Development Integration: Built review and rating RESTful API endpoints with Hibernate ORM, implementing duplicate prevention logic through database constraints and custom validation; developed rating aggregation functions for weighted merchant scoring algorithms. Cloud Infrastructure Optimization: Optimized AWS deployment, configuring EC2 auto-scaling groups and RDS Multi-AZ setup that reduced infrastructure costs by 30% vs fixed instances while ensuring zero-downtime processing for high-volume subscription orders.
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