meet.js [with Intellias]

On Thursday, January 29th @6:00pm, in cooperation with Intellias, once again we bring you the best meetups in town! We have pizza! We have beer! We have great presentations and all your favorite JS folks in one place!
If you are a senior developer, JavaScript intern, or web apps enthusiast, this meetup is the best way to meet people, make friends, and share and gather new knowledge.
Tell your friends, tell your dog and your neighbors, and see you soon!
Want to cooperate, speak at our event, or sponsor a similar one? Write meetjskrk@gmail.com

Agenda:
👩‍🏫 Nataliia Kukulevska (Principal JavaScript Engineer at Intellias)
Prompting Starts with Specs: Making AI Useful with GitHub Spec Kit
In this talk, Natallia will share a practical workflow that makes AI helpful in day-to-day development: spec-driven prompting with GitHub Spec Kit. Instead of treating prompts as magic spells, we start with lightweight specs that capture intent, constraints, edge cases, and acceptance criteria - and then use those specs to guide AI for implementation, refactoring, tests, and documentation.
You’ll see real examples from an enterprise project, including how Spec Kit helps reduce complexity, increase consistency, align engineers and stakeholders, and keep AI output consistent across a team. I’ll also show how the same approach scales down to a simple MVP, where speed matters but clarity still wins.
Key takeaways:

• A repeatable “spec → prompt → code” loop you can apply immediately
• How to write specs that produce better AI output (and fewer hallucinations)
• Templates and habits for faster PRs, safer changes, and clearer scope
• If you want AI to save time instead of creating more work, this talk is for you.

👨‍🏫 Łukasz Wilisowski - AI Agents and LLM Models in a Modular Architecture (Next.js): Comparison and Tier List
Based on a simple modular architecture in Next.js, we will prepare a quasi-scientific double-blind trial to test how different LLM models and AI agents perform on the same tasks.
We will compare their behavior, result quality, and subjective impressions, and attempt to tier the results.

👨‍🏫 Bruno Murek - Advanced types in JSDoc. JSDoc instead of TypeScript
About a year ago, after Svelte developers migrated from TypeScript to JSDoc, interest in this solution increased in the programming community. Sadly, using JSDoc isn't easy due to the lack of comprehensive documentation. Many solutions require searching through various forums, the TypeScript documentation itself (JSDoc in VSCode uses its engine for type checking), browsing other repos, or finding solutions by yourself through trial and error.
I'll explain how JSDoc works and present a few solutions I've found. These include: Complex types with certain defined properties and other arbitrary ones, type copying, conditional types, type algebra (Boolean, union, intersect operations), and functions for creating automatic type definitions.

🚩 Sponsor:
Intellias is a global technology company with 3000 specialists on board. We combine engineering craftsmanship and technology expertise to solve challenges of any nature, scale and complexity. Our development centers are located in Europe, Americas, Middle East, and Asia. Intellias has been celebrated for its people-centric culture and excellence in innovation and has been named Great Place to Work, Best Workplaces in Poland, Friendly Workplace, Dream Employer as well as accolades from Forbes, EY, Puls Biznesu and other respected organizations.