Production Systems & AI

I build production FastAPI backends, deterministic data pipelines, and web interfaces that non-technical teams can actually run from day one.

Most business AI tools fail not on prompt engineering, but on fragile glue code, untyped REST layers, and terminal handoff friction. I deliver strictly typed, test-backed Python systems paired with zero-terminal local launchers and edge deployments.

4 Public Live Systems

100% TDD Test Pass Rate

0 ms Cold-Start Edge Latency

24–48h Milestone Turnaround

Review Work Ledger Discuss a Project

The Work Ledger

Four verified production systems running live. No mockups, no theoretical slides.

System 01 AI Workflows & API Live Sandbox

FastAPI AI Micro-Tools

Lightweight AI automation baseplate designed for high-confidence document extraction, customer support ticket triage, and automated CSV sanitation. Features dual-mode runtime architecture that automatically detects local backend services or falls back to an interactive client-side simulation on Cloudflare Pages.

Core Architecture: FastAPI, Pydantic v2, SQLite WAL, Multi-LLM Orchestrator (Claude, OpenAI, LiteLLM).

Client Experience: Zero-Terminal Windows (.bat) and Mac (.sh) launchers, encrypted local Settings Vault.

Verification: 15/15 automated pytest suite, 0.48s execution, deterministic fallback mock.

Open Interactive Demo ↗

System 02 Web Platform & IoT Production

Walk Taiwan Platform

High-concurrency web platform supporting thousands of long-distance pilgrimage walkers across Taiwan. Delivers real-time GPS trajectory parsing, automated certificate generation, multi-language internationalization, and robust disaster-recovery backups on AWS cloud infrastructure.

Walk Taiwan Pilgrimage Platform Interface

Core Architecture: AWS Lightsail, Docker Compose, Nginx Reverse Proxy, SQLite/Postgres, Automated Daily Backups.

Scale & Users: Thousands of verified participant records, sub-second certificate rendering.

Security & Ops: Zero-downtime containerized updates, automated SSL renewal, GPX integrity parsing.

Visit Production Platform ↗

System 03 Civic Tech & Big Data Live Platform

City Council Auditor

Deterministic data scraper and civic oversight platform conducting complete-census auditing of 367 Taipei and Kaohsiung mayoral cabinet meetings. Systematically surveys 27 statutory municipal committees, tracks executive proxy mechanisms, and visualizes institutional transparency.

Core Architecture: Python Data Extraction, SQLite WAL, Cloudflare Pages Edge CDN, Modern Dark SPA.

Data Volume: 367 complete session transcripts, 27 committee matrices, 0 sampling bias.

Verification: Clean-room data consistency verification against government open data sources.

Open Auditor Platform ↗

System 04 3D Engine & Physics Live 3D Sim

Taiwan Road Delivery

Single-bundle 3D traffic simulation and statutory road-rights education engine. Features 60Hz headless physics simulation, Oriented Bounding Box (OBB) SAT collision calculation, multi-lane continuous cross-sections, and mobile touch dual-write controls.

Core Architecture: Three.js r128, 60Hz Headless Simulation, OBB SAT Collision, Single-File Web Bundle.

Testing Rigor: 37/37 statutory scenario test suite, 20/20 headless SDD test assertions.

Performance: Zero external dependencies, instant 60fps rendering across desktop and mobile.

Play 3D Simulator ↗

Fixed-Price Engagement Menu

Clear scope boundaries, predictable budgets, and guaranteed turnaround times.

Starter: Scripting & ETL

$150 USD fixed · 24 hours

For teams with dirty CSV exports, inconsistent spreadsheet records, or raw JSON feeds requiring automated normalization and deduplication.

Standardization to ISO-8601 dates (YYYY-MM-DD)
Currency symbol and comma removal to clean float values
Fuzzy record deduplication and email normalization
Detailed anomaly report flagging corrupt rows
1-command execution instruction with clean requirements.txt

Select Starter

Standard: FastAPI & AI Extraction

$300 USD fixed · 48 hours

For founders needing commercial contracts, invoices, or customer support tickets structured into validated JSON with a client-ready web interface.

FastAPI backend strictly typed with Pydantic v2 schemas
OpenAI / Claude API integration with retry backoff
Deterministic offline fallback mock engine
Executive Dark responsive web UI with CSV/JSON exports
Double-click Windows (.bat) and Mac (.sh) launchers
SQLite WAL audit log for past extraction runs

Select Standard

Pro: End-to-End AI System

$480 USD fixed · 72 hours

For product teams needing a complete multi-stage AI workflow automation, custom dashboard, and Docker or Cloudflare edge deployment.

Multi-step pipeline (Extract + Triage + ETL clean)
Batch processing of up to 100 documents per execution
Runtime settings drawer for secure API key updates
Docker Compose or Cloudflare Pages static edge deploy
100% automated pytest coverage suite included
1-week post-delivery bugfix warranty

Select Pro

Engineering Standards

Three uncompromising baselines that protect your timeline and maintain code clarity.

1. Specification-Driven Delivery (SDD)

No vague promises like "we'll handle business logic." Every contract opens with a written 3-point acceptance checklist defining exact endpoints, schemas, and test scenarios. You know precisely what is delivered before paying milestone funds.

2. Zero-Terminal Client Handoff

Non-technical teammates should never be forced to debug virtual environments, edit hidden environment files, or resolve terminal path issues. Every tool ships with native double-click launchers and browser-based settings vaults.

3. Privacy & Zero-Leakage Architecture

Your data remains yours. Backends prioritize local SQLite WAL databases, encrypted secret masking, and client-side sandbox fallbacks. Zero external telemetry or unauthorized third-party tracking.

Let's build your next system.

Whether you need a quick 24-hour Python data cleaning script or a robust production FastAPI pipeline, I am ready to review your sample data.

Hire on Upwork ↗

Direct Email: frank860312@gmail.com · Location: Taiwan (UTC+8) · Remote Worldwide · Response Time: Within 12 Hours