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Writing

Newsletter & blog

Long-form engineering on Hashnode. Shorter career and AI notes on Substack. Same Kelvinintech voice — two formats, pulled via RSS.

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HashnodeJul 12, 2026

The Room You Walk Into

A few weeks ago I taught a prompt engineering workshop to a room of high school students in Kinston, North Carolina. One of them told me AI felt intimidating. A…

SubstackJul 12, 2026

The Room You Walk Into

A few weeks ago I taught a prompt engineering workshop to a room of high school students in Kinston, North Carolina.

SubstackMay 23, 2026

Why I’m Writing This: A Self-Taught AI Engineer’s Honest Notes

Hey.

HashnodeApr 22, 2026

Hello_LLM: Calling Claude from Python, C#, and R — Why Biotech Engineers Need All Three

The Problem You've trained a protein-folding model in Python. The biotech company's lab management system runs on C#. Your statistical validation team works in …

HashnodeMar 28, 2026

PyTorch Zero to One: Why I Built a CNN from Scratch (and What It Taught Me That Transfer Learning Wouldn't)

Part 2 of an ongoing series documenting my hands-on journey into deep learning as a software engineer transitioning into AI Engineering. In Part 1, I broke do…

HashnodeMar 11, 2026

PyTorch Zero to One: Tensors, Matrix Math, and Why Shape Errors Will Humble You

Part 1 of an ongoing series documenting my hands-on journey into PyTorch and deep learning as a software engineer transitioning into AI Engineering. Why I'm W…

© 2026 Kelvin R. Tobias

Consulting services are offered through Kelvinintech Consulting LLC (North Carolina). Products in development: Mimikry and DYTGT.

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