[WarsawJS](https://warsawjs.com/) Jam is a hands‑on micro hackathon that offers:

* Expert Mentorship – guidance from seasoned coaches
* AI‑Powered Development – work with tools such as Cursor AI to dramatically accelerate your workflow
* Networking – open, knowledge‑sharing sessions with developers of all experience levels

Follow the latest updates and registration details at 👉 [jam.warsawjs.com](https://jam.warsawjs.com/)
Join in to build projects, sharpen your skills, and connect with a community that loves JavaScript!

Space limited to 16 people!

WarsawJS

Piotr Zientara

Aleksandra Charme

Małgorzata Kalisz

Nikita Nesterov

Mateusz Szczukiewicz

Jacek

alekpawlowski21

Michał Dopieralski

Hubert Bogacz

John Kilmer 

Jakub Zygmunt

WarsawJS Jam

CIC - Warsaw

Join the community that loves code and isn’t afraid to ask the hard questions.
[WarsawJS](https://warsawjs.com/) Meetup #129 is more than just presentations - it’s a space where we share experience, learn, and grow together.
Date: 13 August 2025
Location: TBA
Time: 18:30 - 21:30
What to expect?
🎤 Marcin Borkowski - “Taming massive files in the browser: chunking, streaming & reviewing”
Staff Software Engineer at Box (ex-Netflix). With 20 + years of experience, he’ll show you how to tame gigabyte-scale uploads, slice them into resumable chunks, stream huge CSVs, and build lightning-fast UIs.
🎤 Piotr Migdał - “Thanks to AI, you can WASM. Yes, even in Rust!”
CTO at Quesma and co-creator of Quantum Flytrap. Discover how a few well-crafted prompts unlock WebAssembly and Rust super-powers on the frontend.
🎤 Third speaker - TBA
⚡️ Oskar Korczak - “Prompt compressor” (Lightning Talk)
Seasoned SWE. Learn a simple prompt-compression technique that can slash your LLM bills right away.
Emcee: Mikhail Korolev
Networking: conversations, code, and contacts - the things we love most!
Save the date and join us - we look forward to seeing you!
Sponsors: [Xfaang](https://www.xfaang.com/) \| TBA
Media partner: [K MAG Magazine](https://kmag.pl/)
Partner: [JetBrains](https://www.jetbrains.com/)
‼️ By attending the event, you agree to the event regulations:
[https://bit.ly/warsawjs-meetup-regulations](https://bit.ly/warsawjs-meetup-regulations)

Krzysiek Chojnacki

Ilya Amelevich

Natan

WarsawJS Meetup #129 - onsite

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