Jun Cao | Backend Software Engineer

●+ user_record_v1melbourne · au

I'm Jun Cao — a Software Engineer.

AWS-native backend · Python developer · AI-integrated systems · Distributed design

featured · ai-built

./projects/reach

Reach · 可达

Reach in its Night theme: travel times by public transport from Monash University (Clayton), shaded in ten-minute bands across Melbourne, beside the panel of origin, departure time, transport modes and walking settings. — reach.juncao.devnight · en

Every place you can reach by public transport in Melbourne and Victoria, door to door. Drag the pin and the whole city recolours, computed live by a RAPTOR engine written from scratch.

AI-built

Planned, written and tested largely by Claude Code agents (Anthropic’s coding agents) working as a team of builders and independent verifiers, directed and reviewed by Jun.

Launch Reach Watch the demo User guide

project details

./ask-ai

Ask AI about Jun

open assistant

$ls ./jun.cao --sections

>9 modules loaded · 4 demos · 4 widgets · 1 certificate

About

Who I am, what I do.

Experience

Work history & education timeline.

Ask AI

Chat with a RAG assistant grounded in my knowledge base.

Projects

Personal & resume projects.

Stack

Languages, cloud, tools.

Tech Demos

Tech demos from my projects.

Widgets

Mini-games, algorithm tools, things to play with.

Contact

Open a socket.

Versions

Site evolution. git-log of juncao.dev.

Jun Cao — Backend Software Engineer (AWS · Python · AI-integrated systems), based in Melbourne, Australia.