Based in Toronto · Open to senior backend opportunities

I build backend systems for real-world scale.

I'm Marshall, a backend engineer with 10+ years of experience turning high-throughput, distributed systems into dependable products—and helping teams ship them with confidence.

10+years in software engineering
300Krequests per second at peak
1B+events processed per day
60%latency reduction delivered

Selected work

Engineering with measurable outcomes.

Products and systems where architecture, operations, and user value meet.

01

Learning platform

PASS PTE

A production practice platform for PTE learners, combining focused exercises, progress loops, and reliable delivery across web and backend services.

Next.jsSpring BootMySQLDocker
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02

Continuous learning

Interview Knowledge Base

A structured system for behavioral stories, system design decisions, and algorithm patterns—designed for recall, not passive reading.

System DesignJavaAlgorithms
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03

Developer productivity

AI Engineering Workflow

Experiments in applying coding agents and MCP-based tools to planning, implementation, review, and release work with explicit safety gates.

AIMCPAutomation
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Field notes

Ideas made practical.

Browse all writing

Have a hard systems problem?

Let's make it reliable, observable, and ready to scale.

qiaoyuanshou@gmail.com