I will build java web apps, erp, and backend solutions

S
smh821025
S
smh821025
Zachary Sun
build java web apps, erp, and backend solutions
Full Screen
build java web apps, erp, and backend solutions
Full Screen
Full Screen
build java web apps, erp, and backend solutionsbuild java web apps, erp, and backend solutionsbuild java web apps, erp, and backend solutions

About this gig

I'm a professional Java backend developer with over 10 years of hands-on experience in building scalable and secure business systems. I specialize in custom backend APIs, ERP/CRM module development, database design, and legacy system optimization using Spring Boot, Spring MVC, and Hibernate.


What I offer:

RESTful API development for web and mobile apps

Complete ERP modules (inventory, order management, user roles, etc.)

Database design, optimization, and migration (MySQL, PostgreSQL)

Bug fixing, performance tuning, and code refactoring

Unit testing, integration testing, and deployment support


All orders include clean, well-structured, and production-ready code, clear documentation, and regular progress updates. Please contact me before placing an order to discuss your requirements in detail.

  • Programming language

    • Java

  • Expertise

    • Debugging
    • Performance
    • Design
    • Databases
    • Source control

  • Frontend framework

    • Angular
    • Bootstrap
    • jQuery
    • Vue.js

  • Backend framework

    • Other

Get to know Zachary Sun

Zachary Sun

AI Automation Chatbot Developer Java Web ERP and App Developer

  • FromChina
  • Member sinceApr 2026
  • Avg. response time1 hour

  • Languages

    English
Hi, I'm a full-stack developer specializing in AI automation and custom software solutions. 🚀 My core skills include: 🤖 AI chatbot & agent development with Dify, n8n, OpenAI, and RAG ☕ Java development for enterprise systems and business applications 🌐 Web development and custom ERP/management systems 📱 Mobile app development 🐳 Docker & virtual machine deployment I build reliable, well-documented solutions for small businesses and individuals, from simple AI tools to complete management systems. I focus on clear communication and delivering easy-to-use, maintainable work.

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