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Chia-Yu Chiang · 江家寓

Indie Medical Software Developer

Summary

Biomedical Engineering senior at Ming Chuan University (Class of 2026). Solo-designed and shipped a medical software ecosystem — ClinCalc (consumer), ExClinCalc (clinic CDSS), clinconvert (FHIR interop research), plus the cross-domain Kaizei personal-finance OS. End-to-end ownership from system architecture, database authorization and zero-knowledge encryption to edge deployment and CI/CD. Engineering stance: privacy first, rules over LLMs, security at the database layer.

Highlights

4 shipped products
29 RLS policies
6 RBAC roles
$0 monthly run cost

Selected Work

ClinCalc Consumer Health · 2025–2026

Consumer health self-check & multimodal interpretation platform

Helps everyday users understand lab reports with trustworthy, explainable interpretation.

Next.jsTypeScriptSupabaseCF Workers
Case Study →
ExClinCalc Clinical · 2025–2026

Clinical Decision Support System (CDSS) for primary clinics

Full workflow loop: registration → SOAP charting → prescription check → pharmacist dispensing.

PostgreSQL RLSSupabaseCF WorkersTOTP
Case Study →
clinconvert Interop Research · 2026

FHIR R4 interoperability research POC

Research proof-of-concept: structuring Excel medical records into HL7 FHIR R4 Bundles.

AstroTypeScriptWeb CryptoFHIR R4HL7
Live →
Kaizei Cross-domain · 2024–2026

Personal Finance OS (desktop app)

The same engineering approach, carried across domains — medical-grade security thinking applied to personal finance.

ElectronReactTypeScript strictCF Workers
Case Study →

Experience

2024 – 2026
Solo Developer · Medical Software Ecosystem ClinCalc / ExClinCalc / clinconvert
  • Designed and shipped a clinic CDSS: 6-role RBAC, 14 tables / 29 PostgreSQL RLS policies, TOTP MFA and a complete audit trail; ran a STRIDE threat model (24 threats).
  • Built a consumer platform with real-time interpretation of 45 lab indicators (incl. KDIGO 2024 staging) and a "rules-first, then LLM" privacy architecture keeping raw data local.
  • Deployed entirely on the Cloudflare Workers + Supabase free tier at $0/month run cost; automated CI/CD via GitHub Actions.
2024 – 2026
Solo Developer · Cross-domain Work Kaizei — Personal Finance OS
  • Carried medical-grade security thinking into personal finance: a zero-knowledge vault (PBKDF2 + AES-256-GCM, server physically unable to decrypt), OS keychain integration, Electron sandbox.
  • Double-entry ledger + TW/US stock integration; TypeScript strict, Dependabot supply-chain monitoring.
2023 – 2024
Internal Tooling (part-time) After-school program
  • Built a student-roster and daily-management web app (Vite + Firebase) for internal use at the after-school program where I worked.

Skills

Languages

TypeScriptJavaScriptSQLPython

Frontend

ReactNext.jsAstroElectron

Backend / Data

PostgreSQLPostgreSQL RLSSupabaseCloudflare Workers

Security

Zero-Knowledge EncryptionAES-256-GCMTOTP MFASTRIDE Threat Modeling

Domain

Clinical Decision SupportHL7 FHIR R4KDIGO 2024Medical Informatics

DevOps

GitHub ActionsCI/CDDependabotWeb Crypto API

Education

2021 – 2026
Ming Chuan University B.S., Biomedical Engineering

Started in Computer & Communication Engineering, transferred to BME in sophomore year. Capstone: the ClinCalc / ExClinCalc medical information systems.