Manh P.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I help businesses build, maintain, fix and modernize complex software applications. With 10 years of software development experience, I specialize in backend and enterprise application development using Java, .NET/C# and PHP/Laravel. **WHAT I CAN HELP YOU WITH** - Java application development and maintenance - .NET / C# backend development - PHP / Laravel application development - REST API development and third-party integrations - Database design, optimization and SQL troubleshooting - Legacy application maintenance and modernization - Debugging, performance optimization and production issue resolution - Enterprise software development and system integration I am available for remote part-time engagements and long-term development partnerships. If you need an experienced developer to take ownership of your backend development, resolve challenging technical issues or maintain an existing application, let's discuss your project. Send me a message with your requirements, and I'll help you identify the best approach. **WHAT MY CLIENTS SAID** "Manh is a very talented developer who takes his task very serious. He even found a mistake in the document i sent him and informed me about it in the application phase. This convinced me to hire him and his was think along all the way through the process. Recommended and will work with Manh again" "Manh committed into doing his work. He tested and make sure as less bugs as possible. Am very happy I'm able to get him to work on my projects. Definitely I will find him back if there's future opportunity!"