Nguyễn Xuân Vĩnh

Senior iOS Engineer & Applied AI

“Learning by doing.”

About

Senior iOS Engineer with 10+ years building native mobile applications, currently focused on integrating production AI—LLMs, multimodal processing, on-device ML—directly into iOS apps.

Deep expertise in Swift, Objective-C, SwiftUI, and UIKit; working knowledge of Rust, Python, JavaScript, and TypeScript. Particular interest in NLP and multimodal data processing on mobile.

Experience

Senior iOS Engineer — Chợ Tốt (May 2022 – Present)

Leading AI-driven mobile development for Vietnam’s largest re-commerce platform.

Architected “Quét Là Bán” / AI Rapid Listing (Đăng nhanh bằng AI)—a multimodal feature combining real-time camera processing and on-device ML, serving millions
Integrated TensorFlow Lite for object detection and dynamic questionnaires
Built a real-time video pipeline that cut listing creation time by 70%

Mobile Engineer — VinHMS (Vingroup) (Sep 2019 – May 2022)

Built MyVinpearl, serving 1M+ resort guests
Developed the CiTravel booking platform and CiOwner management system

iOS Developer — 2359 Media (Feb 2014 – Sep 2019)

Singtel TV GO — streaming app for the 2018 FIFA World Cup (Singapore)
NewsLoop — curated news reader
Visit Singapore — official AR travel guide for the Singapore Tourism Board

Projects

Personal

VT Code — CLI semantic coding agent, in Rust
VT Chat — Privacy-first AI chat app with RAG
VT.ai — Multimodal AI chat with dynamic conversation routing
Clendar — Minimal SwiftUI calendar, featured by Apple
WriteDown — Markdown editor with cloud sync
Humid — Voice-first weather app built on Combine

Open Source

OpenAI Codex — Codex CLI improvements
QwenCode — QwenCode CLI improvements

Writing

Lessons from Building VT Code: An Open-Source CLI AI Coding Agent
Rapid Listing — Building a Multimodal AI Application for iOS — Chợ Tốt Engineering Blog

Elsewhere

GitHub · HuggingFace · LinkedIn · Stack Overflow · Twitter · Hacker News

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