Product judgment
Native apps, browser extensions, privacy-oriented product flows, store surfaces, support paths, and public documentation that makes the work legible.
Profile
Pengfan Chang
Product manager and data analytics candidate with hands-on product, data, and software work.
Short Version
I use jpfchang.org to make my product and data work easy to inspect: what I have shipped, how I reason, and which technical choices support the product.
The public trail lives across this site, GitHub, LinkedIn, ORCID, and the writing archive. I care about product clarity, data-backed reasoning, practical execution, and software that treats privacy and documentation as part of the product.
Snapshot
- Name
- Pengfan Chang
- Also known as
- John
- Founder
- Swipht Group (swiphtgroup.com)
- Target roles
- Product manager and data analytics
- Product context
- Native apps, research tools, privacy-minded products, and public product surfaces
- Public profiles
- GitHub, LinkedIn, ORCID, Bluesky, YouTube
- Languages
- Pascal, C, Go, Java, Kotlin, Swift, Python, SQL
- Platforms
- GNU/Linux, macOS, iOS, iPadOS, watchOS, visionOS, Android, open web
- Research identity
- ORCID 0009-0002-9408-5801
How I Work
Data work
Academic workflows, SQL/Python/Excel analysis, ledgers, source-aware writing, and systems that clarify evidence.
Execution
A public portfolio, clear positioning, secure web surface, writing, and source-linked project work that make the craft inspectable.
Toolkit
Native
SwiftSwiftUIKotlinJavaFlutterDartStoreKit
Web
AstroTypeScriptPreactCloudflare PagesWorkersD1
Data
SQLPythonExcel modelingPlotlyresearch notebooks
Quality
VitestPlaywrightaccessibility checksCSPrate limits
Beyond the Desk
I live and work while journeying, and the outdoor thread remains part of my thinking: mountain hiking, backpacking, nature photography, wayfinding, and the patience that comes from moving through wild country.
That part of life shows up in the work as a preference for tools that are clear under pressure, light enough to carry, and honest about their limits.
Public Profiles
The strongest external context is on GitHub and LinkedIn; ORCID anchors research identity.
