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I am a full stack developer with hands-on experience building production-style applications using Java (Spring Boot), React, and FastAPI. I am experienced in designing REST APIs, working with PostgreSQL databases, and deploying applications using AWS. I am currently focused on building real-world projects and improving system design and backend architecture skills.…

YEJUN GUAN

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I am a full stack developer with hands-on experience building production-style applications using Java (Spring Boot), React, and FastAPI. I am experienced in designing REST APIs, working with PostgreSQL databases, and deploying applications using AWS. I am currently focused on building real-world projects and improving system design and backend architecture skills.…

Available to hire

I am a full stack developer with hands-on experience building production-style applications using Java (Spring Boot), React, and FastAPI.

I am experienced in designing REST APIs, working with PostgreSQL databases, and deploying applications using AWS. I am currently focused on building real-world projects and improving system design and backend architecture skills.

Skills

Experience Level

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Intermediate

Chinese

Fluent

Work Experience

Sales and IT Manager at Colorful Life Ltd

June 1, 2012 - Present

Led technical and operational aspects of a family-run e-commerce business. Designed and developed a fully functional e-commerce website using HTML, CSS, JavaScript, PHP, and MySQL, including user authentication, product browsing, search, shopping cart, and order processing. Created an internal inventory management system for Amazon FBA logistics, improving operational efficiency and reducing stock discrepancies; implemented responsive design with Bootstrap for desktop and mobile.