Name: DevBP #11: Crash, Learn and Laugh
Start: 2025-12-03T17:30:00+01:00
End: 2025-12-03T20:30:00+01:00
Location: Colossyan Office

Join us for a cozy end-of-year **DevBP** meetup, where we share **honest stories** about engineering at a startup. We’ll talk about a **release that went terribly wrong** and a **two-month sprint to rebuild Colossyan’s authentication system**. You’ll hear about the triumphs, the mistakes, and the lessons that stuck with us.

Grab a mulled wine, get comfortable, and let’s end the year with honesty, learning, and a few good laughs!

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**We f\*cked up. The story of our worst release so far**
with [Imre Nagy](https://www.linkedin.com/in/imre-nagy-web/) - [Colossyan](https://www.linkedin.com/company/colossyan)
I’ll share a brutally honest reflection on how while **chasing “velocity”** we ran straight into a wall of reality. The outage I’ll share with you wasn’t caused by bad code. It was caused by good intentions, **bad timing, and cultural debt disguised as momentum**. In this talk, I’ll walk through how we built up the perfect storm: pressure to ship, false confidence from our tests, and a release plan that looked smart until it hit production. Lastly I’ll elaborate on **how we changed our ways** since then and the results we achieved.

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**Why engineers hate deadlines? The two month sprint to rebuild our auth**
with [Adam Belakovics](https://www.linkedin.com/in/adambelakovics/) - [Colossyan](https://www.linkedin.com/company/colossyan)
After an unsuccessful contract renewal negotiation, we suddenly had just two months to **migrate Colossyan’s users and rebuild our entire authentication system** from the ground up. What followed was one of the **most intense engineering sprints in Colossyan’s history**, a true open-heart surgery on our platform. To replace Auth0, we chose Keycloak, a self-hosted solution offering comprehensive SSO support and a wide range of customization options. Along the way, we encountered unexpected challenges, made ruthless prioritization calls, and devised clever workarounds that made it possible to finish on time. In this talk, I’ll share **how we pulled it off, what nearly broke us, and the lessons we learned** from this high-stakes migration.

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This **English-language event** will take place at the **Colossyan office**, with snacks and drinks and mulled wine to fuel the conversations.

* **Arrival:** from 17:30
* **Talks begin:** 18:00

Come learn and connect with other tech enthusiasts. Don't miss this chance to be part of an exciting community in Budapest's tech scene. See you there!

Ádám Belákovics

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