I'm Kristoffer Larsen Hopland, a Java and Kotlin developer. I build backend services, JVM libraries, and tools that make development less fiddly—from dependency checks in IntelliJ to clearer XML validation errors.

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A selection of my libraries, plugins, and tools:

• Version Checker · Kotlin — Find and review dependency updates inside IntelliJ IDEA, across Maven, Gradle, npm, pnpm, Yarn, and Bun.
• Better XSD Validation · Java — Turn XML validation failures into structured reports with useful paths and expected elements, while keeping raw XML values out of diagnostics.
• SSE Update · Java / Spring Boot — Send live updates across application instances, with local, JMS, and JDBC transports, plus a working sample application.
• IDE Layout Profiles · Kotlin — Save and switch IntelliJ workspace layouts, including tool windows, editor tabs, and toolbar settings.
• Dependency Snapshot · Java / Maven — Track changes in resolved dependencies, including transitives, and produce text and JSON reports between builds.
• HTML Plan Host · TypeScript / Cloudflare Workers — Turn an HTML file into a temporary shareable page, with immutable revisions and version history.

Off the main path: Emberkai themes for IntelliJ and the occasional Advent of Code puzzle.

Kotlin                                  ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀   39.99 %
Markdown                                ⣿⣿⣿⣿⣿⣿⣦⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀   25.90 %
Java                                    ⣿⣿⣿⣿⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀   16.26 %
Html                                    ⣿⣤⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀   05.05 %
XML                                     ⣿⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀⣀   03.75 %

Always happy to compare notes on JVM development, backend design, or IDE tooling. Say hello on LinkedIn →