Name: Migrating Spring Boot Apps from PostgreSQL to MongoDB
Start: 2025-06-03T22:00:00.000Z
Location: MongoDB Chicago Office

**Join us for an exciting evening of AI-powered creativity at AWS Floor 28!**
Build your best project using MongoDB, AWS, Cursor - or any other tools you like - and compete for awesome prizes! No prior vibe coding experience required!

**Here’s what’s on the agenda:**

* **17:30–18:00** \| Mingling\, snacks\, and getting to know each other
* **18:00–18:30** \| Kickoff \+ quick intro to “vibe coding” \(aka building fast\, having fun\)
* **18:30–21:00** \| Build time\! Create\, innovate\, and show off your skills
* **21:00–21:30** \| Project showcase\, winners announced\, and closing remarks

🍕 Pizza, drinks, and good energy all evening long!

Come solo or bring a team — whether you’re a beginner or a pro, you’ll have a blast and learn a ton.

Tel Aviv MongoDB User Group

Pavel Duchovny

Ashley Majar

מתניה שטינמץ

Bar Israeli

Elad Sheffer

Ygal Bellaiche

Tal Frimerman

orly

Eliezer Schachter

Naor Gonen

Shulamit Moscovich

Or Gutenberg

יניב רוט

Nathan 

Shmulik B.

rafael kohn

Pavel Duchovny-pash10g

Gilad

Alon Even-Haim

Rotem Gabay

The Vibe Coding MongoDB Build Battle

AWS Floor 28

**YOU MUST REGISTER IN THIS LINK:**
[https://events.mongodb.com/developerdaychicago-2025](https://events.mongodb.com/developerdaychicago-2025)

Join us on May 6th and May 7th for a hands-on experience at our exclusive event in Chicago! Throughout the two-day event, our instructors will guide you through sessions on data modeling, advanced querying, AI-powered search, and more. Choose between the two days below, or register to attend both.
We hope to see you there!

**YOU MUST REGISTER IN THIS LINK:**
[https://events.mongodb.com/developerdaychicago-2025](https://events.mongodb.com/developerdaychicago-2025)

Chicago MongoDB User Group

Cassiano Ziegler Bein

MongoDB Community Team

MongoDB Developer Day Chicago 2025 (MUST REGISTER LINK IN DESCRIPTION)

525 W Monroe St 

In this talk, I’ll share my hands-on experience migrating two Spring Boot applications from PostgreSQL to MongoDB. The journey involved redesigning MongoDB collections, refactoring the Java codebase, and efficiently transferring large datasets — including a table with over 25 million records.
Along the way, I encountered and resolved real-world challenges such as memory leaks caused by Hibernate and MongoDB’s “_id is immutable” errors during updates.
The session will include live demos:

* Reproducing and fixing a memory leak
* Performance comparisons showing the impact of MongoDB’s bulk operations

Rajesh Mascarenhas

Anton R

Norman Nithman

Migrating Spring Boot Apps from PostgreSQL to MongoDB

MongoDB Chicago Office 

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MongoDB User Groups (MUGs) are community-driven meetups where developers, database professionals, and tech enthusiasts come together to share knowledge, discuss best practices, and connect with like-minded individuals. Whether you’re a beginner or an experienced MongoDB user, MUGs offer a great way to stay updated with the latest advancements in MongoDB.

Join your local user group to meet local developers, discuss interesting topics, play some tech games, and maybe take home some amazing MongoDB swag!

Want to start a group in your city? Learn More: [https://mdb.link/leader](https://mdb.link/leader)
Want to speak at a MUG Meetup in your city? Learn More: [https://mdb.link/speaker](https://mdb.link/speaker)

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