Name: Data Builders’ Evening: Architecture, Engineering & Beyond | Berlin, Sep. 16th
Start: 2025-09-16T18:00:00+02:00
End: 2025-09-16T21:00:00+02:00
Location: diconium GmbH Berlin Office

Dear data-loving community, we can't wait to present to you our new Meetup event: This time, it will be a collaboration with RisingWave, a platform for real-time streaming data management and analysis. [Yingjun Wu](https://www.linkedin.com/in/yingjun-wu/), Founder and CEO at RisingWave Labs, will share his experience in a techy talk, as well as [Behnaz Derakhshani](https://www.linkedin.com/in/behnaz-derakhshani-63342775/), who works as a Specialist Data Engineer at Diconium's data department. Additionally, we're going to welcome external guest speaker [Erik Schmiegelow](https://www.linkedin.com/in/erikschmiegelow/), CEO at Hivemind Technologies. Exciting line-up, right? :D

Join us on September 16th in Berlin and bring all your questions! Here are the topics you can expect:

**Yingjun Wu:** ***Achieving Sub‑100 ms Real‑Time Stream Processing with an S3‑Native Architecture***

Stream processing systems have traditionally relied on local storage engines such as RocksDB to achieve low latency. While effective in single-node setups, this model doesn't scale well in the cloud, where elasticity and separation of compute and storage are essential. In this talk, we'll explore how RisingWave rethinks the architecture by building directly on top of S3 while still delivering sub-100 ms latency. At the core is Hummock, a log-structured state engine designed for object storage. Hummock organizes state into a three-tier hierarchy: in-memory cache for the hottest keys, disk cache managed by Foyer for warm data, and S3 as the persistent cold tier. This approach ensures queries never directly hit S3, avoiding its variable performance. We'll also examine how remote compaction offloads heavy maintenance tasks from query nodes, eliminating interference between user queries and background operations. Combined with fine-grained caching policies and eviction strategies, this architecture enables both consistent query performance and cloud-native elasticity. Attendees will walk away with a deeper understanding of how to design streaming systems that balance durability, scalability, and low latency in an S3-based environment.

**Behnaz Derakhshani: *From Raw Data to Trusted Assets: A Practical Walkthrough with AWS services and Collibra***

Expect a hands-on journey of Behnaz showing how modern data lake tools and governance platforms connect the dots, making your data discoverable, governed, and productized for real-world use.

**Erik Schmiegelow: *Effective Agentic GenAI in Data Streaming***

Successful genAI projects strike the balance between impact, accuracy, and cost. In this talk, Erik will cover how to create agentic data applications effectively, choosing when and how to integrate them in data streams and keep response quality issues and costs in check.

**What you can expect:**

* 3 expert talks
* Interactive Q&A
* Networking opportunities
* Pizza & drinks (indoor or at our terrace)

**Timetable:**

* 18:00 - Event admission
* 18:30 - Welcome & introduction
* 18:35 - Keynote by Yingjun Wu & Q&A
* 19:05 - Short break
* 19:15 - Keynote by Behnaz Derakhshani & Q&A
* 19:45 - Keynote by Erik Schmiegelow & Q&A
* 20:15 - Snacks, drinks & networking
* 21:30 - End
*

**Our goal is to form a local data-loving community, so join us and let's talk data together!**

-> Our event page, where you can also contact us if you want to present in the future at our Meetup: [Data Engineering MeetUp Berlin - applydata](https://applydata.io/data-engineering-meetup/)

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*At the event, sound, image and video recordings are created and published for documentation purposes as well as for the presentation of the event in publicly accessible media, on websites and blogs and for presentation on social media. By participating the event, the participant implicitly consents to the aforementioned photo and/or video recordings. Find [more information on data protection here](https://applydata.io/events/information-on-data-protection/).*

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Data Builders’ Evening: Architecture, Engineering & Beyond | Berlin, Sep. 16th

applydata Berlin

Data Builders’ Evening: Architecture, Engineering & Beyond | Berlin, Sep. 16th

applydata Berlin

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