CV
Joy Liu (YUN-HSIN, LIU)
Software Engineer | Applied AI | Azure | Django + ASP.NET
| 📧 joy9517538246@gmail.com | 🌐 Blog |
Professional Summary
Software engineer with a B.S. in Information Management and an M.S. in National Defense Cybersecurity Management. Spent three years as a software engineering officer in the ROC Air Force’s communications branch, coordinating the vendor-led delivery of 20+ enterprise MIS systems serving 30,000+ users at 99.9% availability while gatekeeping code quality and performance, and currently serve as a Senior Software Engineering Officer at the Ministry of National Defense, building geospatial data-visualization tooling.
Strong in backend development (C#/ASP.NET, Python/Django), full-stack architecture, and Azure cloud deployment with CI/CD. Independently built and operates a generative-AI SaaS platform (Django + React + Claude API). Master’s thesis bridges academic research with production engineering through an offline-deployed LLM routing system.
Looking for software engineer roles — particularly interested in enterprise software and applied AI.
Professional Experience
Senior Software Engineering Officer
Office of the Deputy Chief of the General Staff for Communications, Electronics and Information (ODCGS/CEI), General Staff Headquarters, Ministry of National Defense | Jan 2026 – Present
- Develop internal geospatial data-visualization tooling, including a Power BI custom visual built in TypeScript + Leaflet.js — interactive maps with layered filtering, marker clustering, coverage-range rendering, fuzzy search (Fuse.js), and polygon/lasso region selection, packaged via the pbiviz toolchain.
- Build a real-time operational command-display web application.
- Advise on software architecture and secure development practices across the office.
Software Engineering Officer
ROC Air Force (ROCAF) – Communications Information Wing, Technical Training Center | Jan 2022 – Dec 2025
- Coordinated the vendor-led delivery of 20+ enterprise MIS systems (ASP.NET MVC + MSSQL/Oracle) serving 30,000+ users at 99.9% availability — served as the technical bridge between vendors and internal systems, gatekeeping functionality, code quality, and performance, and evaluating internal backup/redundancy architecture.
- Independently developed core web applications (personnel review module, employee counseling platform, AD authentication module) end-to-end from front-end (Razor/JavaScript) to back-end (C#/SQL).
- Owned architecture review and tech-stack selection for new requirements; produced API specs, database schemas, security strategies, and technical feasibility reports for leadership.
- Integrated enterprise security (NetApp, Checkpoint, F5, VMware) at the application layer; performed OWASP Top 10 code reviews and vulnerability remediation.
- Leveraged hands-on data-center experience to design and deliver enterprise-infrastructure training for the systems section — covering F5 load balancing, NetApp StorageGRID, VMware virtualization, and internal network architecture, and how each underpins the section’s application systems.
Infrastructure Design Officer
Republic of China Air Force (ROCAF) – Communications Technical Training Center | Jul 2021 – Dec 2021
- Helped plan enterprise network infrastructure supporting 30,000+ users (NetApp StorageGRID, Checkpoint firewalls, F5 LB, VMware vCenter).
- Evaluated and integrated security products (ArcSight SIEM, Cisco IPS, PaloAlto WAF) into the network architecture, contributing to system availability improvement to 99.5%.
- Produced system operating documentation and architecture assessment reports used by development teams for application-layer integration.
Education
M.S. in National Defense Cybersecurity Management
National Yang Ming Chiao Tung University, College of Computer Science | 2023 – 2026
- Thesis: Implementation of an AI Routing System for Military Academy Tasks (details)
- Advisor: Prof. Yu-Sung Wu
B.S. in Information Management
National Defense University, College of Management | 2017 – 2021
- Class Rank: Graduated 1st in class (Valedictorian), Score 87.55/100
- Silver Medal — Military Academy Cybersecurity Competition, 2020
Master’s Thesis
Implementation of an AI Routing System for Military Academy Tasks
Advisor: Prof. Yu-Sung Wu, National Yang Ming Chiao Tung University
- Integrated RAG, Function Calling, and intelligent routing on a fully offline LLM stack (TAIDE-LX-8B / Ministral-8B).
- Validated with 260 test cases across pure-RAG, pure-tool, and hybrid scenarios.
- Achieved 81.74% overall routing accuracy and 40%+ quality lift on tool-calling and hybrid tasks vs baseline.
- Designed for high-security environments where cloud LLM APIs are not permitted.
Personal Project
Generative-AI English Teaching SaaS Platform
Solo Project, 2024 – Present
Live demo (westus2 Azure Container Apps)
- Independently designed, built, and operates a SaaS platform for English teachers under Taiwan’s 108 curriculum — from product discovery through architecture, development, testing, deployment, and ongoing operations.
- Backend: Django 4.2 + DRF + PostgreSQL across 13+ app modules with 70+ pytest tests.
- Frontend: React 18 + TypeScript + Vite + TanStack Query + React Router 7.
- AI integration: Anthropic Claude API with SSE streaming for real-time generation of lesson content; three-tier caching reduces API cost.
- Billing & Auth: TapPay subscription billing, Google OAuth, JWT (15min access / 7d refresh).
- DevOps: Docker multi-stage builds, Azure Container Registry, Azure Container Apps, Azure DevOps Pipelines (Test → Build → Deploy).
- Cloud architecture: deployed in westus2 to bypass Anthropic API’s Asia IP restriction; Azure PostgreSQL Flexible Server, Azure Blob Storage, Google Cloud TTS.
Technical Skills
| Category | Skills |
|---|---|
| Languages | Python, C#, TypeScript, JavaScript, SQL |
| Backend | Django (DRF), ASP.NET MVC, ASP.NET Web Forms |
| Frontend | React 18, Vite, TanStack Query, React Router |
| Data Viz & Geospatial | Power BI Custom Visuals (pbiviz), Leaflet.js |
| Database | PostgreSQL, MSSQL, Oracle, SQLite |
| Cloud & DevOps | Azure (Container Apps, ACR, Blob, PostgreSQL Flexible), Azure DevOps Pipelines, Docker, Git |
| AI / ML | Claude API, LLM, RAG, Function Calling, PyTorch, TAIDE-LX-8B, Vector Database, Computer Vision |
| Testing & Quality | pytest (70+ tests), Vitest, ESLint, TypeScript strict mode |
| Other | OAuth2, JWT, SSE Streaming, SM-2 algorithm, OWASP Top 10, SQL performance tuning |
Certifications
- AZ-104 — Microsoft Certified: Azure Administrator Associate, Microsoft, 2025 (cert)
- CompTIA PenTest+ — CompTIA, 2025 (cert)
- ECIH — EC-Council Certified Incident Handler, EC-Council, 2022 (cert)
- CCNA — Cisco Certified Network Associate, Cisco, 2021 (cert)
Selected Training & Courses
AI & Machine Learning
- Neural Networks and Deep Learning, Coursera, 2025
- Generative AI with Large Language Models, Coursera, 2024
- Learn Hugging Face BootCamp, Udemy, 2024
- Introduction to AI, Coursera, 2024
- PNLP — Python Chinese NLP Expert Course, 2024
Software & Data
- ASP.NET MVC 5 Web Application Design (MVC522), SYSTEX, 2023
- Oracle Database 19c SQL Workshop, Oracle, 2023
- BDPY — Python Data Processing, 2024
- Django 2.2 & Python Web Development Bootcamp, Udemy, 2019
- Docker Containers & Kubernetes System Administration, SYSTEX, 2025
Project Management
- Project Management Assistant (PMA), NPMA, 2019
- Government Procurement Certification, Public Construction Commission, 2021
Languages
- Chinese — Native
- English — Professional working proficiency (TOEIC 800, 2022)
- Japanese — Basic proficiency (JLPT N4, 2021)
Awards & Activities
- Silver Medal — Military Academy Cybersecurity Competition (representing College of Management), 2020
- Valedictorian — National Defense University, College of Management, Class of 2021
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