Jonathan Worthington

Latest news

I recently attended PerlCon, where I delivered a keynote speech on Perl 6 concurrency as well as an update on my work on Perl 6 performance. The slides for both can be found on my talks page. The Swiss Perl Workshop dates unfortunately didn't work for me this year.

I recently developed Log::Timeline, a module that helps visualize and understand what is happening in parallel and concurrent Perl 6 applications. There's a visualizer for it in Comma IDE; I've been finding it helpful in my own work, and hope others will too.

I'm a little behind with my page about trying to travel on all of the Czech railways; it covers all of my 2018 trips, but not yet 2019.

Elsewhere online...

I blog about my work on Perl 6. Or at least, I used to; I'm still doing the work, but got less good at writing about it.

I've got some amount of code on my GitHub account - mostly Perl 6 modules.

I'm @jnthnwrthngtn on Twitter, and even bother to tweet stuff occasionally.

See my consulting profile at Edument, the company I have worked for since 2010. I am co-founder of Edument Central Europe, based in Prague.

My Work


High quality software developer training and mentoring in software architecture, .Net, Git, Perl, and more. Software development consulting. Based in Sweden and the Czech Republic.

Employee #1, co-founder of Edument Central Europe sro.


A virtual machine for the Perl 6 language, with dynamic optimization (type specialization, inlining, OSR, EA), parallel generational garbage collection, and great Unicode support.

Founder, architect, and lead developer.

Rakudo Perl 6

The leading Perl 6 compiler, targetting MoarVM, the JVM, and soon JavaScript too. Written almost entirely in Perl 6, with full support for the Perl 6.d language version.

Architect and lead developer.


Libraries for building reactive services in Perl 6, based around asynchronous pipelines implemented using Perl 6 supplies. Supports HTTP(S), HTTP/2.0, web sockets, and ZeroMQ support is in the works.

Founder, architect.


An IDE being built on the IDEA platform for Perl 6. My contributions include the custom parser engine to achieve accurate Perl 6 hightlighting and designing the MoarVM remote debug protocol.

Founder, product lead.

My Hobbies

Travel and Trains

I'm a keen traveller, having visited over 40 countires so far. I've managed to stand on every continent except Antarctica - which remains a dream! I am especially fond of train journeys; some of the most memorable were in Switzerland, China (especially the railway to Tibet), Japan, Russia (the classic Vladivostok to Moscow route), and New Zealand.


I find photography an enjoyable and creative experience, especially while travelling. I'm not into lugging around heavy equipment to get the best possible technical image; it's the composition of images that interests me more. These days I am using a Sony RX-100, which I'm plenty happy with. My photos adorn the front of my slide decks, and I make a photo calendar each year for family also.


A decade ago I really couldn't imagine cookery becoming one of my hobbies. These days, I find it a pleasant way to unwind after a day at the keyboard, or a nice way to while away some hours on a weekend. Indian cuisine is by far my favorite thing to cook - and, of course, to eat! A handful of spices and a frying pan have given way to a couple of shelves of spices, a karahi, and a tawa.