Jesper Andersen - Blog & DevLog

Maintenance Log - Ninth Week: React Frontend Kickoff (Vite, Routing, Layout)

cph-ja472@stud.ek.dk (Jesper Andersen) — Mon, 04 May 2026 00:00:00 +0000

Devlog Week 9: React Frontend Kickoff (Vite, Routing, Layout)
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This week starts the frontend phase of the Maintenance Log project. The focus was not new domain functionality yet, but establishing a clean React baseline: routing, layout composition, reusable UI building blocks, and a consistent styling foundation.

Maintenance Log - Final Backend Week

cph-ja472@stud.ek.dk (Jesper Andersen) — Thu, 09 Apr 2026 00:00:00 +0000

Devlog Week 8: Final Backend Hardening & Reflection
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This is my last backend-focused post before I shift to a React frontend. This week wasn’t about new domain features — it was about hardening what I already built: tightening a security flaw, centralizing validation, and cleaning up the external API seeding integration.

Maintenance Log - Seventh Week: Deployment, CI/CD & Running It For Real

cph-ja472@stud.ek.dk (Jesper Andersen) — Sun, 29 Mar 2026 00:00:00 +0000

Devlog Week 7: Deployment, CI/CD & Running It For Real
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This week was all about getting the project out of my IDE and onto an actual server. The goal wasn’t to add new domain features — it was to make the API build, ship, and update automatically.

Maintenance Log - Sixth Week: JWT Authentication & Role-Based Authorization

cph-ja472@stud.ek.dk (Jesper Andersen) — Mon, 23 Mar 2026 00:00:00 +0000

Devlog Week 6: JWT Authentication & Role-Based Authorization
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This week was entirely dedicated to building a deployment-ready authentication and authorization system. No new domain features—just securing everything that already exists. The focus was on JWT tokens, role hierarchies, and integrating security seamlessly into the existing architecture without breaking tests or existing functionality.

Maintenance Log - Fifth Week: Interface Refinement, REST API Testing & The Mapper Pattern

cph-ja472@stud.ek.dk (Jesper Andersen) — Mon, 16 Mar 2026 00:00:00 +0000

Devlog Week 5: Interface Refinement, REST API Testing & The Mapper Pattern
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This week marked a significant shift from building features to refining architecture and establishing a robust testing foundation. The focus was on three major areas: granular interface design following ISP principles, comprehensive REST API testing with RestAssured, and implementing the DTO mapper pattern.

Maintenance Log - Fourth Week: Building a Production-Style REST API

cph-ja472@stud.ek.dk (Jesper Andersen) — Mon, 09 Mar 2026 00:00:00 +0000

Devlog Week 4: Building a Production-Style REST API
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Welcome back! This week was all about taking the solid persistence layer and API integration work from previous weeks and exposing it all through a proper REST API. The goal: build a complete, well-architected HTTP interface using Javalin 7.0.1 that follows REST principles and industry best practices.

Maintenance Log - Third Week: External API Integration & Concurrent Processing

cph-ja472@stud.ek.dk (Jesper Andersen) — Thu, 26 Feb 2026 00:00:00 +0000

Devlog Week 3: External API Integration & Concurrent Processing
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Alright, welcome back! After a little bit of a break due to unforeseen circumstances, I’ve now continued my work on this little project of mine. The goal this week was to integrate and fetch some data from an external API and use it somehow — so, without further ado:

Maintenance Log - Second Week: Relations, DAOs & Exception Handling

cph-ja472@stud.ek.dk (Jesper Andersen) — Fri, 13 Feb 2026 00:00:00 +0000

Devlog Week 2: Relations, DAOs & Exception Handling
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So, welcome to this second entry of my Devlog. Without further ado, let’s continue into this week’s additions.

Relations, DAOs and exception handling
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This week’s primary goal was to get the necessary relations between my entities up and running, begin to finalize the DAOs for each, and integrate interfaces both for simple CRUD and for specific queries across the board. After that, the project looked a bit like this:

AI and how I use it

cph-ja472@stud.ek.dk (Jesper Andersen) — Fri, 06 Feb 2026 00:00:00 +0000

Alrighty, let’s try to actually get a real “first” blog post going for this site.

What I use AI for
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For today’s topic I wanted to talk a bit about my personal use of AI, briefly share my opinion on the doomsday talk about it taking our jobs, and explain how I use it day to day as a new programmer in a field where everything apparently is changing just as I get into it.

Maintenance Log - First Week: Project Kickoff & Scope

cph-ja472@stud.ek.dk (Jesper Andersen) — Fri, 06 Feb 2026 00:00:00 +0000

Devlog Week 1: Project Kickoff & Scope
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So, first of all, welcome to this first week post of the development of my little maintenance log. Just for posterity, let’s start with what is in my README for the project, since that actually breaks down what it is:

First Blog

cph-ja472@stud.ek.dk (Jesper Andersen) — Thu, 05 Feb 2026 00:00:00 +0000

First Blog, alot of testing going on with this template… nothing is set in stone for how it looks, but lets see where we end up when were done.

About me

cph-ja472@stud.ek.dk (Jesper Andersen) — Mon, 01 Jan 0001 00:00:00 +0000

If you’ve somehow found your way here: welcome!

My name is Jesper Andersen. At the time of writing this (2026), I’m in my early thirties and currently working on my AP degree in Computer Science at EK – Lyngby in Denmark.

Before this, I spent 14 years in construction working as a journeyman painter.

Jesper Andersen - Blog & DevLog

Maintenance Log - Ninth Week: React Frontend Kickoff (Vite, Routing, Layout)

Devlog Week 9: React Frontend Kickoff (Vite, Routing, Layout) #

Maintenance Log - Final Backend Week

Devlog Week 8: Final Backend Hardening & Reflection #