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Founder and software engineer

Lightning Joyce

Also known as Guangcan Zheng

I build and recover software systems where product behavior, data, infrastructure, and operations need one accountable technical owner.

GitHub LinkedIn gltlab.net

ACCOUNTABILITY

Pure Insight is founder-led: I stay involved from technical fit and system mapping through implementation and written handover.

Working range

Broad implementation range, narrow claims.

My background crosses infrastructure software, security research, native mobile products, subscription systems, backend services, established commercial platforms, payments, cloud operations, and AI-assisted document workflows.

That range is useful when a project crosses boundaries. It does not mean every technology is equally suitable. I begin with the current system, the people operating it, and the consequence of failure, then choose a path that the owner can evaluate and support.

I use AI coding tools extensively in delivery. The standard remains the same: generated work must pass review, tests, runtime checks, and the contract of the system it changes.

Selected background

From systems work to operated products.

  1. 01

    Foundation

    Security research and Tencent MIG

    Studied software engineering, explored deep-learning approaches to web application firewall detection, and completed an engineering internship with Tencent's Mobile Internet Group.

  2. 02

    Systems

    Intel QuickAssist Technology

    Worked on infrastructure software around Intel QuickAssist Technology, with exposure to performance-sensitive systems and established engineering processes.

  3. 03

    Products

    Miaodao and mobile subscriptions

    Built and operated product systems across iOS, WeChat, backend services, subscriptions, and notifications under changing platform and market constraints.

  4. 04

    Current

    Pure Insight and BankScanPro

    Builds AI-assisted document workflows, Cloudflare-operated SaaS, focused Apps, and client delivery around AI integration and software modernization.

Selected evidence

Work that can be inspected in context.

OWNED PRODUCT

BankScanPro

AI-assisted document extraction, validation, asynchronous processing, payments, and operations.

Inspect the case

ANONYMIZED DELIVERY

Legacy modernization

Incremental work in an established commercial platform with public evidence deliberately constrained.

Inspect the method

FOUNDER-BUILT

Miaodao

iOS, WeChat, subscriptions, notification systems, and product operation under external constraints.

Inspect the case

Authored guidance

Decision frameworks used in delivery.

How to evaluate an AI pilot before approving productionEvaluate retrieval before trusting a RAG answerRefactor, replatform, replace, or strangle: a modernization decision guide

Technical fit review

Bring a system where direct technical ownership matters.

Share the system, workflow, or delivery risk you need to resolve. The first review focuses on fit and a practical next step.

Request a Technical Fit Review