Serge Doubinski · Sign Hill
I build useful things with AI.
I’m a product builder and growth consultant. This is where I share the products, systems, and companies I’m building—and the ideas behind them.
See what I’m building01
I work from problem to proof: finding the sharp edge of an idea, building the smallest real version, and learning from what people actually do.
Selected work
Building now
Notes from the work
Writing
New Era-of-Agentic-Writing
A short note by Serge Doubinski about writing with AI.
Best Amazon AI & ML courses for Product Managers and Leaders.
A little over a month ago Amazon made their internal AI and Machine Learning education available to everyone. This is the same training Amazon offers to their employees, and now…
30 Day Plan For Your New Product Hire
After months of searching, screening and interviewing candidates, the offer letter was counter-signed and your new Product hire is starting in a couple weeks. Awesome!
What I do
Product judgment with builder speed.
I help teams find valuable AI opportunities, shape products people can understand, and build the systems needed to learn quickly.
Sign Hill is my consulting practice. I take on a small number of focused AI, product, and growth engagements alongside my own builds.