Sydney, Australia/Full-stack software engineer
Ivan Yu
Full-stack software engineer / Data engineer. Enjoys building automation tools, k3s home labbing, building harnesses, and just building general small scripts here and there.
Feel free to contact me for any project ideas/collaboration opportunities, love to contribute or start new open-source projects!
Reducing AI costsAug 20, 2026 / 6 min / How I use a cheap model for most of an agent task and save the expensive model for decisions that actually matterCheapest AI ProviderAug 16, 2026 / 4 min / What provider should you actually go with?Stop paying for SaaSJun 15, 2026 / 4 min / SaaS is trash, replace your Asana, Figma, Slack, Firebase etc etc with free self-hosted stuff.
[A]OpenSEA full-stack B2B SaaS suite with inventory management and no-code ETL pipelines built for on-premises data sovereignty.[I]OpenAgentAn open-source desktop coding agent built on OpenCode, with scheduled tasks, extension management, subagent views, and local voice input.[M]SemiquaverAn iOS music player that reads audio from Apple Files and supports library browsing, queues, playlists, and full-screen playback.[M]AmoveA macOS utility with a temporary file shelf and commands for moving windows between displays.[A]Pi-ConfigThe shared Pi setup I use for model selection, approval modes, planning, subagents, context diagnostics, and automatic compaction.See all projects →
SpeedX
Full stack software engineerMay 2025 – present
Software engineer internFeb 2025 – May 2025
365 Roadside Assistant (Optik Consultancy)Back-end developer / data engineer internMay 2025 – Aug 2025
University of Technology SydneyBachelor of Engineering (Data Science)Feb 2023 – Nov 2026
Sharetea AustraliaBaristaAug 2023 – Jul 2025