Gdańsk TypeScript Meetup Group

meet.js Gdansk TypeScript Meetup #19

Thu, Apr 23 · 5:30 PM CEST

DevOne Hub, Aleja Grunwaldzka 411, Gdańsk, PL

19th edition of Gdańsk TypeScript Meetup / meet.js by Handsontable

> 🇬🇧 This event will be held entirely in English.

## What’s on the agenda?

### I. The Forgotten Art of Thinking — How to Learn with LLMs Without Increasing Cognitive Debt (Using Tactical DDD in TypeScript as an Example)

Tomasz Ducin (DeveloperJutra.pl | Consultant | Bottega IT Minds)
Research shows that using LLMs leads to accumulating “cognitive debt” — people take intellectual shortcuts. The LLM generates a wall of text, the operator may not even read it, and a false sense of “job done” emerges. This applies to research (not verifying sources — e.g. LLMs citing non-existent studies — ouch, politicians!), coding (“I don’t read what I push to production”) — but also, and this is our focus — learning.
What if LLMs are a tool that simultaneously elevates you to new heights — and frighteningly dumbs you down (and everything in between)? LLMs are “just a tool” — sure, sure. But how do you use them in practice to maximize those “heights” and minimize the dumbing down?
When generating text/code becomes cheaper, understanding and decision-making become relatively more expensive.
We’ll return to the foundations of cognitive science and dust off the fundamentals of “critical thinking”, then apply “learning with LLMs” in practice — using various techniques, methods, and tools to build your own understanding (and mental models) of a given topic, verification methods, methods of “going deeper” (not just “there are always more layers” — but also — knowing where to stop) — and many other practical tips. The concrete subject matter: tactical DDD with TypeScript code.

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### II. The Morning I Came to Work and Found a TypeScript Handsontable

Mateusz Wojczal (Handsontable, Engineering Manager)
A candid post-mortem of migrating a 30k+ line production JavaScript library to TypeScript with AI assistance — what worked surprisingly well, what still needed human judgment, and what lessons apply to any team considering the same gamble.

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### III. Your AI Agent Is Just a While Loop with an API Call. Let Me Prove It.

Michał Michalczuk (Tektit, Consultant & Senior Software Engineer)
Debugging an AI agent feels like hitting a black box with a stick?
Been there, done that. I’ve been building an AI agent that helps professionals prepare for meetings by processing emails, chats, and calendars with the Vercel AI SDK.
I’ll show you what’s actually inside: loops, API calls, tool invocations, and a lot of glue. No magic — just code you can understand and debug.
In this talk, I will reveal:

• What actually happens during an agent’s “thinking” — using real API call traces from a production system
• How tool calling and MCP integration work under the hood (with live coding)
• The orchestration and architecture patterns you have to take care of and be aware of

You’ll walk away knowing what your agent is doing when no one is watching. No more black boxes.

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### IV. 🍕 Pizza & Networking

The rest of the evening is yours — great conversations until the end of the night.

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💁 Register using your full name.
Remember to bring a document confirming your identity.
If you’re not using the Meetup app, please send a DM to https://www.linkedin.com/in/mateusz-wojczal/
The event is hosted thanks to the support of Dynatrace at #devonehub — a space created by and for IT geeks.
Learn more 👉 https://devone.com.pl/
Live stream and recording available on YouTube: https://www.youtube.com/@qunabu/streams

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## Speakers

Tomasz Ducin (DeveloperJutra.pl | Consultant | Bottega IT Minds)
Developer, architect, consultant, trainer. Co-creator of ANF (architekturanafroncie.pl) and creator of Developer Jutra (https://developerjutra.pl/). Frontend and backend. Former stage actor.
LI: linkedin.com/in/tomasz-ducin
Mateusz Wojczal (Handsontable, Engineering Manager)
Full-stack web developer with 18 years of experience. Since 2011, has been leading software house Qunabu Interactive, now Escolasoft, where he held the Chief Technology Officer role. Communicates effectively and works well in teams from around the world. Experienced with DevOps — Linux/AWS/GCP, GitLab CI/CD. DDD enthusiast.
LI: linkedin.com/in/mateusz-wojczal
Michał Michalczuk
Senior Software Engineer and consultant at Tektit Consulting. IT trainer. Talks and creates content on front-end, Node.js, AI, and web development topics. Co-organizer of meet.js Gdańsk meetup. One of the talking heads on “@DRAMA-dev” and other video formats by JustJoin.it.
LI: linkedin.com/in/michalczukm
YT: youtube.com/@DRAMA-dev

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The event partner is Dynatrace, along with the meetup space #devonehub.
Learn more: https://careers.dynatrace.com/locations/gdansk/

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The event partner is meet.js — JavaScript meetups in Poland.