Author of picocli - a mighty tiny command line interface - a modern library for rich CLI apps that run on and off the JVM.

BY DAY: Algo and Algo Trading Platform Development at SMBC Nikko Securities, developing automated trading systems for the Japan equity market.

BY NIGHT: Log4j 2 performance hacker. I made Log4j 2 garbage-free, and contributed Async Loggers, which have 10x more throughput and orders of magnitude lower latency in multi-threaded scenarios compared to current market-leading logging packages log4j-1.x and logback. Responsible for most of the performance improvements since Log4j 2.0-beta4.

FOR FUN: Learn new stuff: performance, concurrency, scalability, low latency, AI, machine learning, cryptography, bitcoin and cryptocurrency technologies.