Hai Mac Duy
Backend Developer at AppotaPay
Hà Nội, Vietnam
Summary
👤
Senior🎓
Top SchoolHai Mac Duy is a seasoned backend developer with 17 years of experience, currently leading POS services and backend payments at AppotaPay in Hà Nội. He designs and implements secure, scalable integrations with banks and e-wallets (MoMo, ZaloPay, VNPAY), enforces PCI DSS practices, and architects end-to-end POS payment flows including reconciliation and T+1/T+2 settlement scheduling. His background spans Golang backend systems, real-time order sync across e-commerce platforms, telemetry for CameraAI, and embedded IoT/FreeRTOS projects, giving him a rare full-stack view from devices to financial systems. Hai is skilled at standardizing API communication (REST/SOAP), building connector frameworks and observability tooling to ensure smooth cross-channel fulfillment and payments. He combines hands-on implementation with operational discipline, often building admin workflows and error-detection mechanisms that reduce dispute resolution time.
17 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Electrical and Electronics Engineering, Bachelor's degree, Electrical and Electronics Engineering at Posts and Telecommunications Institute of Technology
Stackoverflow
680reputation
50kreached
19answers
2questions
Github Skills (136)
code-generation10
cuckoo10
matcher10
mocks10
swift10
database10
storage10
persistent10
embeddable10
mocking10
mockito10
unit-testing10
stub10
meta10
boilerplate10
Programming languages (11)
Github contributions (5)
macduy/chemix
Mar 2016 - Feb 2019
App for drawing lab diagrams, suitable for science classes in schools. Written in hybrid Flash+JS.
Contributions:7 releases, 43 PRs, 175 pushes in 2 years 11 months
diagramssciencejavascriptflashsuitable
macduy/codelite.org.uk
Jun 2020 - Jul 2024
Contributions:13 pushes, 1 branch in 4 years 1 month
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.