Lead Storage Management team- Develop & maintain features about Data & Storage of Zalo app: + Local resources, data readiness + Cloud storage (zCloud / MyCloud), backup/restore, transfer message- Design technical workflows, write technical specs- Planning tasks and review codeMentor team members and foster their growth. Work closely with them to enhance their logical thinking abilities, ensure the delivery of clean code, and improve their error-handling skills.Working directly with Product Manager, Technical Manager, Server, Data and UI/UX team.

Develop Zalo Android app:- Develop & maintain features about Chat & Messages.- Refactor codebase to MVP architecture with Clean Code, SOLID principles, unit testing.Working directly with Product Owner, Server, QC and UI/UX team.

Develop Zalo Android app:- Develop ZAM monitor system to detect performance issues. - Using Big Data tech stack (Kafka, Hadoop, Hive, Postgres, Presto,..)

Technical Writer. Focused on Android Development.

Develop survey/HR/CRM Android apps:- xlsform, OpenDataKit, javarosa.- VOIP Call for rtApps (CSipSimple, Linphone).- SOLID principles, design patterns, architectural patterns (MVP with DI), Reactive Programming (using Rx).- Lead the process of profiling & improve app performance.- Write unit test/UI test using JUnit, Mockito and Espresso.- Build a custom Continuous Integration system using Jenkins CI.Agile and SCRUM workflow. Working directly with Clients, Product Owner, QC, Server and UI/UX team