Talks

2022-10-22T00:00:00+00:00

I've presented 25 talks at 36 events across 14 countries.</p>

Here's a list of all the talks I've given to date, with slides and videos if available.</p>

Title</th>	Events</th>	Links</th> </tr> </thead>
Are You Tall Enough for This Ride? Real-world Challenges in Code Generation</b> (2025)</span></p> </td>	🇨🇭 Scala Days</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
All the projects I didn't finish, and why it was worth it</b> (2025)</span></p> </td>	🇵🇱 Scalar</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Scala Native and Nix - a match made in heaven??</b> (2024)</span></p> </td>	🇵🇱 Wrocław Scala User Group</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Calico - the functional frontend library you didn't know you needed</b> (2024)</span></p> </td>	🇵🇱 Art of Scala</span></p> </td>	slides</a></span> \| </span>demo</a></span> \| </span>recording</a></span></span></td> </tr>
Foraging into embedded lands - writing Playdate games in Scala</b> (2024)</span></p> </td>	🇵🇱 Scalar</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Let's build an IDE!</b> (2023)</span></p> </td>	🇬🇧 Scala in the City</span></p> </td>	slides</a></span> \| </span>code</a></span> \| </span>recording</a></span></span></td> </tr>
Adventures in the land of Language Servers</b> (2023)</span></p> </td>	🇵🇱 Lambda Days</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Pain-free APIs with Smithy4s</b> (2023)</span></p> </td>	🇵🇱 Scalar</span>, </span>🇵🇱 Wrocław Scala User Group</span></p> </td>	slides (EN)</a></span> \| </span>slides (PL)</a></span> \| </span>recording</a></span></span></td> </tr>
Things I didn't want to know about JVM bytecode but learned anyway</b> (2022)</span></p> </td>	🇵🇱 Art of Scala</span></p> </td>	slides</a></span></span></td> </tr>
Nix for Scala folks</b> (2022)</span></p> </td>	🇵🇱 Art of Scala</span></p> </td>	slides</a></span></span></td> </tr>
Connecting the dots - building and structuring a functional application in Scala</b> (2021)</span></p> </td>	🌎/🇦🇺 YOW! Lambda Jam</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Irresistible party tricks with cats-tagless</b> (2020)</span></p> </td>	🌎/🇺🇦 Scala UA</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Keep your sanity with compositional tracing</b> (2020)</span></p> </td>	🇺🇸 Typelevel Summit</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Introduction to interruption</b> (2019)</span></p> </td>	🇬🇧 Functional Scala</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
A sky full of streams</b> (2019)</span></p> </td>	🇬🇧 Scala World</span>, </span>🇬🇧 London Scala Community Day</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Flawless testing for the functional folks</b> (2019)</span></p> </td>	🇵🇹 LX Scala</span>, </span>🇮🇹 Scala Italy</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
A server is just a function: introduction to http4s</b> (2019)</span></p> </td>	🇵🇱 Kraków Scala User Group</span>, </span>🇺🇸 Lambda Conf</span></p> </td>	slides</a></span> \| </span>recording 1</a></span> \| </span>recording 2</a></span></span></td> </tr>
Conquering concurrency with functional programming</b> (2019)</span></p> </td>	🇵🇱 Scalar</span>, </span>🇺🇦 Scala UA</span></p> </td>	slides</a></span> \| </span>recording 1</a></span> \| </span>recording 2</a></span></span></td> </tr>
Lightweight, functional microservices with http4s and doobie</b> (2019)</span></p> </td>	🇧🇾 Scala Night</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Incremental purity</b> (2018)</span></p> </td>	🇮🇪 Dublin Scala User Group</span></p> </td>	slides</a></span></span></td> </tr>
Typelevel alchemist (workshop)</b> (2018)</span></p> </td>	🇵🇱 Scala Wave</span></p> </td>	slides</a></span></span></td> </tr>
Legacy code from day one</b> (2018)</span></p> </td>	🇯🇵 Scala Matsuri</span></p> </td>	slides</a></span> \| </span>recording</a></span></span></td> </tr>
Fantastic monads and where to find them</b> (2017/2018)</span></p> </td>	🇺🇦 Scala UA</span>, </span>🇸🇮 BeeScala</span>, </span>🇳🇴 flatMap(Oslo)</span>, </span>🇵🇹 LX Scala</span>, </span>🇩🇪 Berlin Scala User Group</span></p> </td>	slides</a></span> \| </span>recording 1</a></span> \| </span>recording 2</a></span></span></td> </tr>
7 sins of a Scala beginner</b> (2016/2017)</span></p> </td>	🇵🇱 Scala Wave</span>, </span>🇫🇷 ScalaIO</span></p> </td>	slides</a></span> \| </span>recording 1</a></span> \| </span>recording 2</a></span></span></td> </tr>
Macro sourcery</b> (2016)</span></p> </td>	🇵🇱 Functional Tricity</span>, </span>🇵🇱 Kraków Scala User Group</span></p> </td>	slides</a></span> \| </span>recording 1</a></span> \| </span>recording 2</a></span></span></td> </tr> </tbody> </table> </div> Learning vim by blogging 2019-04-30T00:00:00+00:00 I decided that writing about something is one of the easiest ways to learn it for a longer period of time. In this blog post, which I hope to update once in a while, I'll be sharing my findings about Vim (neovim).</p> This post will be written exclusively in (variants of) Vim.</p> Data coherence at large 2019-04-14T00:00:00+00:00 A week ago, while coming back from Scalar</a>, I was thinking about coherent data. In particular, I was wondering if it's possible to perform certain simple validations and encode their results in types. Here's what i found.</p> What makes a function pure? 2018-12-02T00:00:00+00:00 Everyone knows that naming things is hard. In fact, often it seems to be one of the hardest things in computer science and programming in general. In addition, sometimes a single word has multiple meanings, or worse - a term is explained in a variety of slightly differing definitions. One such term is a pure function.</p>

Jakub Kozłowski

Flavors of shared state in Cats Effect

Asking better questions

Nix Flakes: first steps

Talks

Learning vim by blogging

Data coherence at large

What makes a function pure?