• Handled and led multiple large local desktop application projects related to hotel management, POS, asset management, queuing system, integrations to PABX, accounting softwares, and others. • Participate in writing technical documentations using UML (Use Cases, Class diagrams, Activity diagrams) • Responsible for the design and implementation of a variety of software solutions. • Involved in analyzing user requirements, researching, designing and writing software programs. • Correct errors by making appropriate changes and then rechecking the program to ensure that the desired results are produced. • Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements. • Write or contribute to instructions or manuals to guide end users. • Consulting clients concerning the maintenance and performance of deployed systems and providing them support for various concerns. • Provide onsite and remote support to clients