1. Assisted professors for CS5002 (Discrete Structures) and CS5520 (Mobile App Development) in preparing weekly lectures and office hours;2. Mentored students to solve their questions with data structures, algorithms, and full-stack mobile application development.

1. Built a full-stack web service within AWS Firewall Manager for customers to inspect and remediate overly permissive IP permissions from security group, protecting designated service against DDoS attack by audit policy;2. Implemented server-side backend with Java/Spring to interact with S3, DynamoDB, CloudWatch and Lambda, then encapsulated backend as APIs and Microservices, and developed Integration Test framework with Scala;3. Migrated frontend-side web application from Angular to React.js using TypeScript, designed Penetration Tests to ensure client-side security, also synthesized alarms generated from pipelines.