geecon

Artur Skowronski and Tomasz Lelek spent a year figuring out which engineering practices actually survive when AI models rotate every quarter.
They wrote it down. You can download it.

Vibe Engineering: Best practices, mistakes, and tradeoffs. Free ebook, co-published with Manning Publications.

Download here: https://hubs.ly/Q04jmnHS0

And if you're in New York next week, come and grab a free hardcopy. Details here: https://hubs.ly/Q04jmjFn0

geecon 2026 - a recap on ➡️ https://blog.allegro.tech/2026/05/geecon-2026-recap.html

Our Senior Software Engineer, Małgorzata Karmazyn, went to GeeCON expecting a slow decline. Instead, she found a conference that felt genuinely made by engineers for engineers.🔥

Highlights from the two days in Krakow: Dylan Beattie opening with a live FizzBuzz rock performance in his own programming language Rockstar. A practical breakdown of why AI agents slow you down if used without guardrails. A deep dive into JVM startup optimizations. Our own Allegro speakers on thread pool queue diagnostics and server-side Swift.

The most interesting part? The closing panel on LLMs was unexpectedly reflective - less hype, more honesty about burnout and interruption-driven development. Turns out, the biggest bottleneck in agentic coding is us.

We're at geecon 2026 in Cracow - come find us at the booth!

Need a break between the AI and agent talks? Our speakers have something different for you:

🔸 Mateusz Nalepa - Thread Pool Queue Wait Time: The Bottleneck even AI couldn't find (Day 1, 17:20, Room 11)
🔸 Marcin Kliks - Lightning fast services with Server Side Swift (Day 2, 11:20, Room 6)

Fundamentals, performance, and unconventional stacks - come geek out with us. We're at the booth both days. 🧡

What happens when AI coding agents move faster than your test environments? 🤖⚡

At , Tom Akehurst will explore “The AI-driven future of test environments” — from unreliable pre-prod setups to AI-powered simulated environments that can finally keep up with modern development.

Creator of WireMock, Tom will show how simulation and AI can transform testing at enterprise scale.

https://2026.geecon.org/speakers/info.html?id=1095

Proud to welcome Revolut as a Sponsor of 2026! 🚀

From fintech innovation to engineering at scale, Revolut is redefining the way millions of people manage money worldwide.

Meet them in Kraków on 14–15 May!
https://www.revolut.com/

“Attackers don’t break crypto — they exploit assumptions.” 🔐

At , Marcin Łapaj will show how broken authorization, weak tenant boundaries, and compromised dependencies turn normal apps into breach machines.

Talk: “Authorization & Dependencies: the two ways apps betray us”

https://2026.geecon.org/speakers/info.html?id=1099

Meet Dominik Cebula — Cloud Software Principal Engineer at HSBC, Udemy instructor, and book author with 17+ years of experience building scalable cloud-native systems.

At 2026 he’ll present “Short-Term & Long-Term Memory in an AI Agent with Spring AI” covering:
• Spring AI Chat Client API
• STM & LTM memory
• MCP Servers & Tools
• Building modern AI Agents

https://2026.geecon.org/speakers/info.html?id=1101