BatchRefUpdated in pull-replication talk.

Change-Id: I7d672e80938bfb96df3bc3a2b08c613b100b7f1a
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 | 15:00     |           | *TALK AVAILABLE - Sweden*
 | 15:45     |           | [Make your owners rules faster](sessions/speed-up-owners.md)
 | 16:00     |           | Break & Networking
-| 17:00     | 08:00     | *TALK AVAILABLE - Sweden* (USA early attenders, breakfast with remote viewing of talk)*
+|           | 08:00     | USA, early attenders, breakfast with remote viewing of talk
+| 17:00     |           | [Processing multiple ref updates as a one event - pull-replication use case](sessions/batchref-update.md)
 | 18:00     | 09:00     | *LIGHTNING TALKS*
 | 18:45     | 09:45     | [Code Review Research Highlights](schedule/recent-rebels-research.md)
 | 19:30     | 10:00     | End of Day 1 - Sweden / Break & Networking - US
diff --git a/sessions/batchref-update.md b/sessions/batchref-update.md
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+# Processing multiple ref updates as a one event - pull-replication use case
+
+In this talk, we would like to discuss new stream event called `batch-ref-updated`
+which represents a single batch ref update operation.
+
+We will introduce the new stream event, discuss what are the benefits of using
+it and how to configure Gerrit to produce new events.
+After the introduction we would like to show a working example of the
+`batch-ref-update` event in pull-replication.
+
+*[Christoforos Miliotis, GerritForge Inc.](../speakers.md#cmiliotis)*
+*[Marcin Czech, GerritForge Inc.](../speakers.md#mczech)*
diff --git a/speakers.md b/speakers.md
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+++ b/speakers.md
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 [LinkedIn](https://www.linkedin.com/in/farshadkazemi/)
 
+### Marcin Czech - GerritForge {#mczech}
+
+Marcin is a Senior Software Engineer at GerritForge where he contributes to the
+OpenSource Gerrit Code Review project.
+
+Over the last four years he has been involved in the design and development of
+numerous parts of the Gerrit ecosystem, such as: Gerrit core, multi-site,
+events-broker(Kafka and AWS Kinesis) and pull-replication.
+
+### Christoforos Miliotis - GerritForge {#cmiliotis}
+
+Christoforos is a Software Engineer with a broad experience in distributed
+systems. He joined GerritForge in March 2023 where he contributes to the
+OpenSource Gerrit Code Review project.
+
 ### Jacek Centkowski - Unaffiliated {#jacek}
 
 Jacek Centkowski is a Gerrit contributor since 2013. He deepened his Gerrit knowledge and
 involvement and was trusted a maintainer in 2020. He has recently focused on
 [owners' plugin improvements](https://gerrit-review.googlesource.com/c/plugins/owners/+/373094/1).
 
-[LinkedIn](https://www.linkedin.com/in/jcentkowski/)
\ No newline at end of file
+[LinkedIn](https://www.linkedin.com/in/jcentkowski/)