Kelvinintech
  • Home
  • Consulting
  • Shop
  • Labs
  • Tech Affiliates
  • Projects
  • Writing
  • Contact

Writing

Hashnode & Substack

Long-form engineering on Hashnode. Shorter career and AI notes on Substack. Pulled automatically — no manual updates.

Follow on SubstackHashnode blog
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…

HashnodeJan 26, 2026

FBP (Fat Polar Bears): The Ice Breaker Strategy for Tech Conversations

Ever walked into a networking event, conference, or Slack channel and frozen up? You know you should jump into the conversation, but your brain goes blank. I've…

HashnodeAug 29, 2025

Mastering Control Flow: switch vs if-else in C#

🔁 Use switch when... ✅ You’re comparing one variable against multiple constant values ✅ The values are discrete and predictable (e.g., strings, integers, enu…

HashnodeAug 28, 2025

🔧 C# Classes, Constructors & Instances — A Mechanic's Guide to OOP

As a former mechanic turned developer, one of the ways I learned to understand object-oriented programming in C# was by treating it like working in a garage. If…

HashnodeAug 27, 2025

Exploring Implicitly Typed Variables in C#

When learning C#, one of the convenient features I discovered is implicitly typed variables. Using the var keyword, you can let the compiler infer the type of a…

HashnodeAug 26, 2025

Understanding Type Conversion in C#: Implicit, Explicit, and Conversion Helpers

Working with different data types in C# often requires converting values from one type to another. During my recent practice, I explored implicit and explicit c…

HashnodeAug 21, 2025

🔢 Convert.ToInt32 vs. int.Parse in C# — Which One Should You Use?

When you’re working with numbers in C#, sooner or later you’ll face the question: 👉🏾 “Should I use int.Parse() or Convert.ToInt32()?” Both get you from some i…

Also on the newsletter page.

© 2026 Kelvin R. Tobias

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

KRT