Hung P.

Need an experienced developer to build, fix, or scale your web application? I'm a Senior Full-Stack Developer with 14+ years of experience building production web applications, eCommerce platforms, APIs, and custom business systems. With 500+ completed Upwork jobs, 18,000+ hours, 100% Job Success, and Top Rated Plus status, I focus on reliable development, clean code, and long-term client relationships. I can help you with: ✓ Laravel / PHP backend development ✓ Node.js APIs and integrations ✓ React.js / Vue.js frontend development ✓ OpenAI API & AI chatbot integration ✓ Shopify & Magento customization ✓ REST / GraphQL / third-party APIs ✓ SaaS and custom web applications ✓ Legacy application modernization ✓ Performance optimization & bug fixing AI & API Development I can integrate OpenAI and other AI services into existing applications, build custom chatbots, AI-powered workflows, internal tools, and connect AI features with your existing APIs and databases. Why work with me? ✓ Careful review of the existing system before recommending changes ✓ Clear scope, practical estimates, and early communication about dependencies ✓ Regular progress updates and explanations you can understand ✓ Maintainable code and a focus on long-term support Send me a brief description of your application, the issue or feature you need help with, and your priorities. I can help clarify the scope and recommend the next steps.