Hi, I'm Vo Thanh Tung
Architecting Scalable Microservices, High-Performance Web Applications & Edge AI Systems
Full-stack developer with 4+ years of production experience building scalable, enterprise-grade web applications and distributed systems using NodeJS, ReactJS, and TypeScript. Passionate about client-side Edge AI (WASM speech recognition & neural TTS), real-time streaming, and resilient cloud architecture that reduces operating overhead while delivering 60 FPS user experiences.
Production web & backend engineering across streaming, telematics, and e-commerce.
Engineered scalable distributed services with SSO, RabbitMQ, and Elasticsearch.
Custom auto-scaling video pipeline slashing cloud video processing bills.
Full-text phonetic corpus indexed with sub-millisecond client-side fuzzy search.
Edge AI architecture running 100% in-browser Kaldi WASM & Piper Neural TTS.
Personal Projects & Edge AI Breakthroughs
Architected to eliminate cloud latency and recurring API bills. Explore authentic production UI screenshots, client-side WebAssembly runtimes, and interactive feature walkthroughs.
LingoCore🎙️
Privacy-First, Zero-Latency Offline English Pronunciation & Phonetics Coach powered by Edge AI
Traditional pronunciation platforms rely on cloud speech APIs, introducing latency (>300ms), privacy concerns, and high recurring bills. LingoCore eliminates all three by executing Kaldi speech recognition (Vosk WASM), Neural TTS (Piper WASM + ONNX), and in-memory phonetic search directly in the browser with zero server costs.
Core Engineering Highlights
Landing & Edge Architecture Overview
Client-side Kaldi WASM + Piper Neural TTS ($0 Cloud Cost)Privacy-first pronunciation coach executing Kaldi speech recognition & Piper Neural TTS 100% offline in browser.
Production Engineering & Enterprise Systems
Delivering high-scale microservices, automated video transcoding pipelines, geospatial telematics platforms, and enterprise workflow systems with measurable business impact.
Paracel Technology Solutions
Full-stack Developer
Core engineer developing high-scale microservices, telematics platforms, and legal workflow automation systems, serving hundreds of thousands of users and processing enterprise workloads.
- Engineered end-to-end features across 8 modular services, from REST/event API contracts to modern Next.js frontend interfaces.
- Implemented a centralized Single Sign-On (SSO) authentication service to unify user identity, tokens, and RBAC across all ecosystem services.
- Architected an auto-scaling video transcoding pipeline processing 300+ videos/day, reducing per-video cloud transcoding costs by ~60% vs AWS MediaConvert.
- Integrated RabbitMQ for async distributed worker jobs and Elasticsearch for full-text search, achieving sub-second discovery across 100k+ video records.
- Built multiple responsive frontends: primary streaming platform, video transcoding ops dashboard, live shopping checkout UI, and embeddable real-time comment widgets.
- Designed and implemented geospatial reporting system using bounding-box queries for high-performance spatial data retrieval over millions of GPS telemetry points.
- Engineered asynchronous push notification infrastructure using BullMQ queues and FCM topic broadcasts, decoupling notification fanout from HTTP request cycles.
- Built interactive map-based frontend with automated viewport bounds fitting and custom SVG markers for smooth trip and driving event visualization.
- Developed dynamic analytics dashboards with configurable filters, risk score calculation engines, and interactive trend charts.
- Engineered automated email ingestion service retrieving and parsing emails and attachments with background task pipelines for case assignment and document processing.
- Developed a dynamic, modular form builder enabling legal operators to configure customizable workflows and client intake forms without redeploying code.
- Created a generic, high-performance data table component with resizable columns, keyboard navigation, and cross-component drag-and-drop capabilities.
Rikkeisoft
Full-stack Developer
Engineered full-stack solutions for enterprise clients in document management and high-traffic e-commerce domains.
- Implemented an infinite scroll masonry (brick) layout for efficient rendering of large media collections.
- Built admin dashboard features for customer-specific branding, including custom banners and logos.
- Developed media management interfaces for uploading, organizing, and maintaining large image libraries.
- Created analytics and reporting dashboards to track media usage and customer activity.
- Integrated RESTful APIs to connect frontend features with backend services.
- Implemented data extraction logic using regular expressions to parse and structure OCR output from Google OCR.
- Built dynamic document templates to auto-populate extracted data, reducing manual data entry effort.
- Designed and developed a multi-step document processing workflow for file upload, extraction, validation, and editing.
Skills & Engineering Matrix
Full-spectrum capabilities spanning high-performance client runtimes (WASM, React 19, Monaco), robust backend architectures (NestJS, RabbitMQ, BullMQ), and distributed cloud infrastructure.
Frontend Engineering
SSR, SSG, Server Actions, Dynamic OG
Hooks, Virtualization, Concurrent Mode
Strict type systems, Generics, ASTs
@theme tokens, modern responsive UI
Off-thread compute, Service Workers
Backend & Microservices
Modular architecture, REST & GraphQL
Asynchronous I/O, Event loop, Stream pipes
Service mesh, distributed decoupling
OAuth 2.0, JWT, RBAC, Data sanitization
RabbitMQ job workers, BullMQ async queues
Edge AI, Audio & Media
Browser-level high-performance runtimes
Offline speech recognition & grammar
In-browser neural speech synthesis
OPFS local neural model caching
Auto-scaling cost-saving transcoding
Databases & Search
Relational modeling, Indexing, Geospatial queries
Caching, BullMQ persistence, Pub/Sub
Document modeling, Aggregation pipelines
Full-text indexing, sub-second queries
In-memory search
Cloud, DevOps & Storage
Multi-stage builds, dev/prod parity
Scalable compute, storage pipelines
MinIO, Backblaze B2, DigitalOcean Spaces
Git flow, automated test pipelines
Topic broadcast & user push notifications
Let's Build Something Extraordinary
Whether you are looking to scale an enterprise microservices ecosystem, implement zero-cost Edge AI speech pipelines, or build responsive web applications, I am open to discussing new opportunities.