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wei sun

@weisun1

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Full Stack Software Engineer building Java and Go services with Redis caching that cut MySQL query load by over 60%.

China

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I built a distributed management platform with Java Spring Boot and Go Gin services, using Redis caching to reduce MySQL query load by over 60%.

On that project, I implemented RBAC and JWT validation across the services and developed a Vue.js frontend connected through Axios.

At Qi-AnXin Group, I conducted web vulnerability assessments and documented remediation guidance for backend development teams. Later, at Guizhou Mengdong Technology Co., Ltd., I automated data verification with Python scripts and handled data cleansing and validation.

Experience

Work history, roles, and key accomplishments

Data Processing & Annotation Specialist

Guizhou Mengdong Technology Co., Ltd.

Mar 2025 - Jul 2025 (4 months)

Handled AI data cleansing, schema structuring, and validation workflows, sustaining an accuracy rate above 98%. Automated routine data verification tasks using Python scripts to ensure data integrity.

Data Cleaning Data Validation Python Automation Data Integrity Edge Case Detection

Penetration Testing / Security Intern

Qi-AnXin Group

Feb 2023 - Apr 2023 (2 months)

Conducted web vulnerability assessments and security scanning on target enterprise systems, analyzing API attack vectors. Identified and reproduced common backend vulnerabilities including SQL injection, XSS, and privilege escalation, and authored remediation reports.

Vulnerability Assessment Security scanning SQL Injection XSS OS Privilege Escalation API Security Remediation Reporting