Portfolio on Caleb Christensen

A Handwritten Test

Wed, 06 May 2026 17:57:26 -0600

Check out my handwriting below:

zoom_in

Building a RAG Pipeline for Personal Knowledge Management

Mon, 08 Dec 2025 00:00:00 +0000

Overview

An experimental project to index my personal notes (Org-Mode) into a vector database for semantic search and chat interaction. (Note: This project is in progress and is not published yet).

Solving the "Blurry Line" Problem: Engineering a Python CLI for E-Ink Devices

Thu, 04 Dec 2025 00:00:00 +0000

Introduction

I love my Supernote Manta. It’s a fantastic e-ink writing tablet. But like many e-ink devices (reMarkable, Boox), it suffers from a specific hardware constraint: no sub-pixel anti-aliasing.

If you take a standard PDF template —say, a ruled notebook page generated by a generic tool— and load it onto the device, the lines often look gray, fuzzy, or inconsistent. This happens because the lines land on fractional pixel coordinates (e.g., \(y = 10.4\)), forcing the display controller to dither the pixels. On a crisp 300 DPI e-ink screen, this blur is immediately noticeable and reduces the “paper-like” contrast.

Sales Funnel Efficiency & Rep Performance Analysis

Mon, 01 Dec 2025 00:00:00 +0000

Overview

Role

Revenue Operations Analyst / Sales Strategy Lead

Objective

Analyze raw sales performance data to identify revenue leakage, optimize lead distribution, and define enablement strategies.

Context

About This Case Study: This analysis was completed in the course of my GTM Team Lead role, this is an restroactive refinement of the process I used to identify optimization opportunities and present actionable recommendations.

Figure 1: Sales Efficiency Heatmap Data

CSS Stress Test

Thu, 20 Nov 2025 00:00:00 +0000

This post serves as a “unit test” for my design language, inspired by the Nier: Automata YoHRa UI. It contains examples of common Org Mode elements to ensure the Hugo CSS handles them correctly.

Typography and Inline Styles

We need to verify that italics, bold text, ~~strikethrough text~~, and underlined text render cleanly. We also need to check distinct elements like code (tilde) and verbatim (equals).

This is the keybinding for find-file: C-x C-f

Philosophy

Thu, 20 Nov 2025 00:00:00 +0000

The Reality of Modern Hardware Ownership

You own a laptop. It’s five years old but functional—the hardware works, the screen is intact, the battery holds charge. Then the manufacturer stops releasing security updates.

What happens next isn’t a simple risk of data theft. An unsupported operating system becomes an exploitable entry point for the entire system. Known vulnerabilities in the OS kernel allow an attacker to gain root access. From there, they can exploit low-level system interfaces to write malicious code directly into the firmware—the UEFI or BIOS that loads before your operating system even starts.

AppSheet Quoting Tool (Prototype)

Sun, 10 Nov 2024 00:00:00 +0000

(Content goes here…)

Building the GTM Dashboard (Case Study)

Fri, 15 Sep 2023 00:00:00 +0000

(Content goes here…)

Kanban Card Implementation: Why I Chose Index Cards Over Software

Wed, 01 Aug 2018 00:00:00 +0000

Overview

Role

Operations Intern / Supply Chain Analyst

Objective

Resolve critical inventory stock-outs and production delays by redesigning the component replenishment workflow.

Context

Dynatronics (Medical Device Manufacturer) – The manufacturing floor was suffering from inefficiencies that were delaying shipments and tying up working capital.

1. The Strategic Choice: Adoption Over Complexity

The most obvious solution for a modern supply chain problem is usually “more software.” However, after analyzing the environment, I realized the core challenge wasn’t just data; it was user adoption.