I will develop secure API integrations for erp and CRM systems

H
hansanghoon
H
hansanghoon
Sang Hoon Han
develop secure API integrations for erp and CRM systems
Full Screen
develop secure API integrations for erp and CRM systems
Full Screen
develop secure API integrations for erp and CRM systemsdevelop secure API integrations for erp and CRM systems

About this gig

I am a Senior Software Developer with expertise in PHP and Java. I build secure API integrations, ERP/CRM automation, and enterprise data solutions. My focus is reliability, scalability, and clear documentation. I deliver clean code, testing, and optimized systems that save time and reduce errors. Whether you need a simple API connection or a complex enterprise integration, I provide professional results tailored to your business needs.


FAQ:


Q1: What do you need to start? System/API docs and a clear goal.

Q2: Can you work with other languages? Yes, also Java and .NET.

Q3: Do you include testing and docs? Yes, always.

Q4: Is my data secure? Yes, with authentication and encryption.

Q5: Do you offer maintenance? Yes, via custom offers.

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Databases

  • Programming language

    • PHP

  • Frontend framework

    • Angular
    • jQuery
    • React.js
    • Tailwind CSS

  • Backend framework

    • Laravel
    • Spring Boot
    • Symfony

Get to know Sang Hoon Han

Sang Hoon Han

Senior Backend Systems Modernization Engineer

  • FromEcuador
  • Member sinceSep 2026

  • Languages

    English, Spanish
I am a highly reliable Senior Backend and Systems Modernization Engineer with over 14 years of experience designing and upgrading enterprise-grade systems. I specialize in Java and PHP ecosystems, with a proven track record in complex legacy migrations and mission-critical ERP integrations. I am an expert in leveraging AI-assisted engineering tools to optimize workflows and enforce code quality.

My Portfolio

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