Hi, I'm Vesa, a solution architect from Finland.
I try to make complicated software easier to live with. I’m most interested in software that helps people work better and makes data easier to understand. A lot of that comes down to reducing unnecessary complexity. Lately I’ve been focused on software transformation, AI/LLM applications, and performance.
Writing
- Datan hyötykäytön uusi anatomia reflector.fi · Mar 2026
Projects
Cobol to Java modernizer
Converts legacy Cobol programs into modern Java. A grammar-driven parser and multi-stage deterministic AST pipeline produce runtime-correct Java. LLM stages then modernize and optimize the output.
arch-audit
An architecture auditing tool that speeds up getting oriented in an unknown codebase. It combines static analysis, dependency scanning, code metrics, and structure extraction into an interactive terminal-based findings browser.
Omastoppi.fi
Web/mobile application for quickly viewing departure times for nearby public transport stops. Data fetched realtime from the HSL GraphQL API.
Econstats.eu
Application which charts the major macroeconomic indicators with an EU focus. Data is fetched every day from the BLS, FRED, and ECB APIs.
Neural networks and automatic differentation in Java
Neural networks with automatic differentiation and backpropagation in Java from scratch.
WFC generator
In game development WFC (Wave Function Collapse) is used for generating output based on a set of tiles and rules. This output can then be used for different purposes, like level or texture generation. Here I'm creating textures. This is a simple Java implementation of Wave Function Collapse algorithm where the rules are defined in code.
Spacefly
2D game with procedural level generation and dynamic area of sight calculation.
Javarays
Raytracer in Java.
Snakeray
Multiprocessed raytracer in Python.
