Ciki Zeng
Solo Developer x AI

One Person x AI
= One Team

3 SaaS products. One person. No team, no outsourcing, no funding. From idea to production — all with AI as a co-founder.

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SaaS Products

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Tests

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Case Studies

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Enforcement Hooks

Built Solo. Shipped Real.

Each product solves a real problem for real users — designed, built, and maintained by one person with AI.

JumpOnion

AI Figure Skating Jump Analysis

Upload a video, get AI-powered biomechanical analysis: takeoff angle, rotation count, landing stability, and personalized training plans. What takes a human 30 minutes takes JumpOnion 60 seconds.

Live — V1.3+, 931 tests passing

Next.jsModalSupabaseStripeGemini
SmartLearning

AI Adaptive Learning Platform

A three-layer anti-hallucination system with Bayesian Knowledge Tracing adapts in real-time. MAP-calibrated assessments track true progress, and a Portfolio builder prepares kids for school applications.

V2.8 Beta — live

Next.jsSupabaseStripeOpenAI
SmartQuoteProInternal

AI-Powered Facility Maintenance Quoting

Built for my company SunnyUnite to serve enterprise clients like UNIQLO. An AI-trained pricing engine generates competitive, accurate quotes in minutes instead of hours. The training methodology is proprietary — and the system has been in production use since v10.

Production v10 — enterprise client in use

Custom AIProprietary Training

Plus SunnyInvoices — a three-layer automation script (Tampermonkey + Node.js + Playwright) that turns a 5x manual process into one click. Not a product, just a testament to solving real problems with code.

Get the AI Workflow That Built All of This

The same methodology, templates, and enforcement hooks I use every day — packaged for you to install and start using immediately.

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