Nguyễn Xuân Vĩnh, also publishing as Vinh Nguyen and vinhnx, is a senior iOS engineer at Chợ Tốt. He works on AI-assisted mobile experiences and maintains VT Code, an open-source Rust coding agent for the terminal.[1][2][3]
Start with VTCode →
Education
Links
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GitHub · vinhnx 
X · vinhnx Senior iOS Engineer · Chợ Tốt
Career
His CV lists Senior iOS Engineer at Chợ Tốt from May 2022, Mobile Engineer at VinHMS from September 2019 to May 2022, and iOS Developer at 2359 Media from February 2014 to September 2019. He earned an information-technology BEng at Tay Do University, studying from 2008 to 2012. The work spans travel, media and marketplace applications before his recent focus on applied AI.[2]
Contributions
Keep the coding loop observable
VT Code combines a terminal interface with model-provider choice, tools and execution policy. It supports read-only planning, change review, headless execution and resumable sessions. The project’s HOVER loop asks the agent to state an expected outcome, gather bounded tool evidence and revise when the result disagrees with the hypothesis.[4]
Put fast guidance on the device and deeper inference on the server
In his Chợ Tốt article, Vĩnh explains a team-built listing workflow that extracts product information from camera and audio input. On-device object detection supplies immediate guidance; selected frames and audio go to remote models for richer attributes and listing suggestions. The mobile application handles variable or incomplete responses rather than assuming every model output fits a fixed schema.[5]
Tools, writing & talks
Tools
Start here
VTCodegithub.comA terminal coding agent with model choice, execution policy and resumable workflows.
Read the planning and policy overview, then try a focused repository question. Setup needs a supported operating system and model-provider access; inspect proposed edits and tool results before accepting changes.
Creator and maintainer[3][4]Original source
Writing, research & talks
- Rapid Listing: building a multimodal AI applicationblog.chotot.com
An engineering account of camera processing, local object detection and remote model integration.
Author; participant in team implementation[5]