@speed-engineer

Two Products, One Year, Endless Lessons: What Building in Public Actually Taught Me

May 1 · 3 min read · Honest confession: for most of my freelancing life, I was bad at tracking time. Not "a little disorganized" bad. More like "reconstructing three weeks of work from memory on invoice day" bad. I'd sit down, open a blank spreadsheet, try to piece toget...

How to Build a Shared AI Prompt Library for Your Team (Without Slack-Pinning Chaos)

Apr 28 · 4 min read · If you've ever worked alongside a marketing, sales, or support team that's adopted ChatGPT, Claude, or Gemini, you've probably watched the same scene play out: Someone writes a great prompt for outbound emails. It gets pasted into a Slack DM. Three w...

The Sunday Notebook: What a Two-Product Week Quietly Taught Me

Apr 26 · 2 min read · The Sunday Notebook: What a Two-Product Week Quietly Taught Me Most Sundays I scroll back through the week's commits, support tickets, and Slack threads, looking for the lesson hiding in the noise. This week I found five. I'm working on two things in...

How a 64-Byte Constant Quietly Doubled My Throughput

Apr 25 · 3 min read · How a 64-Byte Constant Quietly Doubled My Throughput There's a number I keep tattooed on the back of my brain when I'm designing wire formats. It's 64. That's the cache line size on every x86_64 and ARM CPU you're likely to deploy on. And ignoring it...

The founder lesson I wish someone told me sooner: your first 100 users don't want what you think they want

Apr 24 · 3 min read · Your first 100 users don't want what you think they want Six months ago I shipped FillTheTimesheet, a time-tracking app for freelancers and agencies. The pitch in my head was gorgeous: automated tracking, smart categorization, AI-assisted client bill...