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Ooolaa /README.md

Jyong-Jia (John) Chen

ML engineer — vision-language inference, applied NLP, on-device AI. Taipei, Taiwan · open to remote · available from September 2026

I turn customer requirements into system design, then debug what breaks. Most of my work is production machine learning: getting models onto real hardware behind real APIs, with the operations documentation that lets someone else run them.

Email LinkedIn

Experience

HiPower — ML Engineer (contract)

Mar 2026 – Apr 2026 · Taiwan · AIoT computer vision for traffic, access control and public-safety deployments

  • Gathered requirements directly from the customer and designed the system — replaced a pipeline needing a separately trained YOLO model per scenario with one generalising vision-language deployment, specifying an 18-field structured output schema (visibility, vehicle breakdown, congestion, incident and lane-blockage detection, recommended action) that downstream software could consume without changes.
  • Diagnosed two deployment-blocking failures under time pressure — blank analyses traced to images nested inside messages rather than at the /api/generate root, and degenerate repeating output from parallel small models that repeat_penalty could not suppress, resolved by re-sizing to a single larger model after measuring both configurations.
  • Delivered the full stack and handed it over — Apache/PHP portal → FastAPI service → Ollama → MySQL audit log, with systemd auto-start, an API-key boundary, a health endpoint covering every tier, a spec-compliant REST API for third-party software, and complete operations documentation for another engineer to run it from.

Built as StreamSight.

Selected work

Project What it is
StreamSight Real-time VLM inference platform for IP cameras & IoT — FastAPI + Ollama concurrent pipeline, PHP/MySQL portal, systemd deployment, spec-compliant REST API
TechPulse Offline-first on-device AI learning platform (iOS) — SwiftUI, SwiftData, Foundation Models; every inference local, 68-concept knowledge graph, 49 tests across 7 suites
SeedSent Few-shot LLM-guided ABSA via sequential DeBERTa-v3 fine-tuning — pseudo-labelling that removes most of the annotation budget; ×ばつ speedup via batched GPU inference
aspect-sentiment-analysis DeBERTa-v3 on M-ABSA, evaluated against SemEval-2014, ACL-14 Twitter and hand-annotated reviews
NCAV_Lasso M.S. thesis — sparse vs. dense models in explainable AI: NCAV + Lasso interpretability layer on a from-scratch ResNet-50

How I work

Spec-first, agent-assisted development: specification and architecture written first, implementation driven through Claude Code, with the design document and test suite as the contract.

Stack

ML PyTorch · Transformers · DeBERTa-v3 · Ollama · NVIDIA CUDA · multi-GPU · YOLOv7 · OpenPose Backend Python · FastAPI · asyncio · PHP · MySQL · Docker · systemd · Linux Apple Swift · SwiftUI · SwiftData · Foundation Models

Education

M.S. Computer Science & Information Engineering — dual degree University of Queensland, Australia (Feb 2024 – Dec 2025) Tamkang University, Taiwan (Sep 2021 – Jan 2026) Thesis: Comparative Analysis of Sparse and Dense Models in Explainable AI for Image Processing, supervised by Prof. Tim Miller. Teaching Assistant, Introduction to Artificial Intelligence (Feb–Jun 2022)

B.S. Computer Science & Information Engineering Tamkang University, Taiwan (Sep 2018 – Jun 2021)

Pinned Loading

  1. TechPulse TechPulse Public

    Offline-first AI news reader that grows a living knowledge map — on-device summaries, skill-tree gap detection, habit-forming daily goals. SwiftUI + SwiftData + Foundation Models, iOS 26

    Swift

  2. NCAV_Lasso NCAV_Lasso Public

    M.S. thesis — sparse vs dense models in explainable AI: NCAV + Lasso interpretability layer on a from-scratch ResNet-50, 18-config sweep over MNIST and ImageNet

    Jupyter Notebook

  3. aspect-sentiment-analysis aspect-sentiment-analysis Public

    Aspect-based sentiment analysis: DeBERTa-v3 fine-tuned on M-ABSA, evaluated against SemEval-2014, ACL-14 Twitter and hand-annotated Foursquare reviews, plus the Selenium corpus scrapers.

    Python

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