Daniel Roy Greenfeld

Daniel Roy Greenfeld

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Recent Writings

What I miss about London

Thoughts about things I really enjoyed during the approximately two years we lived in London.

What my head injury taught me about B2B sales

There's this way of writing on LinkedIn where you start with a personal story, and then you draw a business lesson from it. It's a silly pattern that often reeks of faked success and other forms of falsehood. So what better use of my available writing time before symptoms kick in today than to write one of those posts?

Concussion Symptoms

Documenting how the head injury incurred on January 16, 2026 continues to affected me one month later.

Concussion (I Hit My Head)

On January 16th, 2026 I suffered a a significant concussion and I'm still recovering.

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TIL (Today I learned)

Using PygmentsRenderer with mistletoe as a partial

Default code block languages for mkdocs

Loading .env files with uv run

Merging two git projects

Setting environment variables for pytest

Using SQLModel Asynchronously with FastAPI (and Air) with PostgreSQL

Single source version package builds with uv (redux)

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Featured Writings

The Thirty Minute Rule

What to do when you get stuck on a coding issue for more than 30 minutes.

What's the Best Thing about Working for Octopus Energy?

An in-depth discussion about my employment at Octopus Energy.

Code, Code, Code

I'm often asked by new programmers how they can forge a path into using their skills professionally. Or how they can get better at writing software. In this article I share the secret master-level method to improvement.

I Married Audrey Roy

The story of one of the best days of my life.