OpenSearchCon Europe 2025

OpenSearchCon Europe 2025

In-person
30 April - 1 May 2025
Learn More and Register to Attend

The Sched app allows you to build your schedule but is not a substitute for your event registration. You must be registered for OpenSearchCon Europe 2025 to participate in the sessions. If you have not registered but would like to join us, please go to the event registration page to purchase a registration.

Please note: This schedule is automatically displayed in Central European Summer Time (UTC+02:00). To see the schedule in your preferred timezone, please select from the drop-down located at the bottom of the menu to the right.

IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

09:00 CEST

Keynote: Welcome & Opening Remarks - Dagney Braun, Amazon Web Services; Jochen Kressin, Eliatra & Search Guard; Eric Pugh, OpenSource Connections

Wednesday April 30, 2025 09:00 - 10:00 CEST

Speakers

Dagney Braun

Amazon Web Services, Senior Manager of Product, OpenSearch

Dagney Braun is Senior Manager of Product on the OpenSearch Team at Amazon Web Services. She is passionate about improving the ease of use of OpenSearch, and expanding the tools available to better support users across all of OpenSearch’s use cases, including search, observability... Read More →

Jochen Kressin

Founder and CEO, Eliatra and Search Guard

Jochen Kressin is the Founder and Director of Eliatra and a pioneering figure in the OpenSearch ecosystem. As the creator of Search Guard, he brings deep expertise in search security, compliance, and enterprise-grade implementations. At Eliatra, he leads a team focused on delivering... Read More →

Eric Pugh

Co-Founder, OpenSource Connections

Eric Pugh is the co-founder of OpenSource Connections. Today he helps OSC’s clients, especially those in the ecommerce space, build their own search teams and improve their search maturity, both by leading projects and by acting as a trusted advisor.He is an active maintainer on... Read More →

Wednesday April 30, 2025 09:00 - 10:00 CEST
Matterhorn

Keynote Sessions

10:20 CEST

Dive Deep on OpenSearch’s Vector Search - Jon Handler, Amazon Web Services & Yuye Zhu, Amazon

Wednesday April 30, 2025 10:20 - 11:00 CEST

Search engines take in a query and return a set of results that best satisfy the need of the searcher. Words from a text box, user interface facets, and some user identity information have been the clues for good retrieval. Today, Large Language Models (LLMs) produce vectors with semantic information that augments or replaces lexical information for retrieving best results. OpenSearch's low-level APIs can connect with and use LLMs as part of an overall search solution. A full solution still requires some higher-level coding to take full advantage of these APIs. In this talk, we’ll cover some theory on similarity, and how and where vectors can help you retrieve better results. We’ll dive deep on opensearch-ml-quickstart (https://github.com/Jon-AtAWS/opensearch-ml-quickstart), an open-source example set for managing connections with OpenSearch, local models, and vector embeddings. We’ll walk through examples and code to help you get started quickly with OpenSearch’s vector capabilities: exact nearest-neighbor matching, dense vector embeddings, and sparse vectors. You’ll leave with a great tool in opensearch-ml-quickstart, along with the knowledge of how to apply it.

Speakers

Jon Handler

Director of Technology, Search Services, AWS, Amazon Web Services

Jon Handler is Director of Technology at Amazon Web Services based in Palo Alto, CA. Jon works with OpenSearch and Amazon OpenSearch Service, helping customers who have vector, search, and log analytics workloads that they want to move to the AWS Cloud. Prior to joining AWS, Jon’s... Read More →

Yuye Zhu

Machine Learning Engineer, Amazon

Yuye Zhu is a Machine Learning Engineer Engineer at OpenSearch, AWS. His interests include LLM, agent, RAG and information retrieval.

Wednesday April 30, 2025 10:20 - 11:00 CEST
Matterhorn

Search

11:05 CEST

Where’s the Auto in Auto-Instrumentation? A Look at Current Automation Strategies with OTel - Joshua Lee, Altinity

Wednesday April 30, 2025 11:05 - 11:45 CEST

“Automatic Instrumentation” can mean a lot of things depending on context. Whether we’re discussing the Instrumentation SDKs or full-kernel observability with eBPF, the promise is the same: end-to-end observability coverage with no custom code and minimal setup.

First, I will review how the different mechanisms available for automatic instrumentation work within each of the 11 languages supported by OpenTelemetry. I’ll examine:

- how code-path instrumentation works at the library level by diving into the Node.js OpenTelemetry Extension and the JavaScript libraries it supports
- automatic instrumentation via attachment with Java and Python
- automatic instrumentation injection using the OTel Operator for DotNet, Java, and NodeJS

Finally, I’ll take a peek at the future of automatic instrumentation of compiled binaries with a look at the Go instrumentation library built using eBPF.

In this talk will attempt to clarify the different mechanisms that are often colloquially lumped under the term “Auto-Instrumentation” and help to clarify for end users exactly what is possible within each supported language.

Speakers

Joshua Lee

Developer Advocate, Altinity

Joshua is a seasoned software developer with over a decade of experience, specializing in a broad range of topics including operations, observability, agile methodologies, and accessibility. Currently, Joshua serves as a Developer Advocate for Altinity, where he creates educational... Read More →

Wednesday April 30, 2025 11:05 - 11:45 CEST
Matterhorn

Analytics + Security + Observability

11:50 CEST

Managing Over 1,000 OpenSearch Clusters in a Private Cloud - Sun Ro Lee, LINE

Wednesday April 30, 2025 11:50 - 12:30 CEST

In this session, we'll share our experience managing over 1,000 OpenSearch clusters in a private cloud, focusing on technologies used for stable operations and cost reduction. The LINE Cloud team provides OpenSearch as a backend for various LINE services, aiming for automated operations with minimal user intervention. We'll detail our service architecture utilizing Kubernetes and OpenStack, focusing on stability, scalability, and automation.
Additionally, we intend to share our experience collaborating with the storage team to design lightweight storage solutions for OpenSearch. This solution and our architecture enable high performance while reducing maintenance costs. In a recent migration case, we achieved a 22% reduction in infrastructure costs for OpenSearch 'hot' nodes. Also, we'd like to share some of the issues we encountered under high load situations to share our experiences on the private cloud. This session will offer practical insights for engineers interested in operating OpenSearch in their own environment.

Speakers

Sun Ro Lee

Cloud Engineer, LINE

Sun Ro Lee is a cloud service developer at LINE, specializing in delivering OpenSearch as a service. With expertise in tuning search engines and log services, he is dedicated to optimizing large-scale distributed systems for enhanced performance and stability in cloud computing.

Wednesday April 30, 2025 11:50 - 12:30 CEST
Matterhorn

Operating OpenSearch

13:35 CEST

Effortless Collaboration With OpenSearch Workspace : A Hands-On Demo - Abhay Baiju, Atlassian & Shambhavi Sarin, Salesforce

Wednesday April 30, 2025 13:35 - 14:15 CEST

In a large organisation at scale, collaborating effectively on analytics and observability is a major challenge. Sharing the right set of permissions with the right stakeholders is a critical task. OpenSearch Workspace, a powerful new feature aims to make this collaboration much easier.

This session will dive into how OpenSearch Workspace can empower your team to efficiently share insights, visualise data and help drive faster decisions. We’ll go over the basics of a workspace, practical use cases, including shared dashboards and granular access control, and also have a hands-on demo of setting up a workspace.

Attendees can expect to leave with a deep understanding of:

- How OpenSearch Workspaces function and their role in the
ecosystem
- Configuring and optimising workspaces for diverse use cases.
- Setting the right level of access for workspaces
- Getting Workspace up and running in your team.

Whether you're an engineer or a data scientist, this session will leave you equipped to enhance collaboration in your organisation and get the most out of OpenSearch Workspace.

Speakers

Abhay Baiju

Software Engineer, Atlassian

I'm a software engineer who's really into creating sustainable and effective software. I find DevOps and backend technologies intriguing. My interest in these areas grew as I got hands-on experience with the concepts and applied them to different projects. I'm a passionate person... Read More →

Shambhavi Sarin

Member of Technical Staff, Salesforce

Shambhavi is an engineer at Salesforce working on building software and delivering end to end applications. Shambhavi has been living in Bangalore and has had various developer and operations roles throughout her career while staying active in the open-source developer community... Read More →

Wednesday April 30, 2025 13:35 - 14:15 CEST
Matterhorn

Analytics + Security + Observability

14:20 CEST

Enhancing Application Observability With OpenSearch and OpenTelemetry - Karsten Schnitter, SAP SE

Wednesday April 30, 2025 14:20 - 15:00 CEST

How do you know whether your applications are running smoothly or struggling? OpenSearch can provide insights and analyze telemetry data of your applications. Modern observability revolves around three core signal types: logs, metrics, and traces. This talk demonstrates how to instrument your applications and collect these signals using OpenTelemetry, enabling comprehensive insights into application performance and health.
We explain how to map the data in a way to easily correlate logs, metrics, and traces. Building on these correlations we present how OpenSearch can be leveraged to generate advanced insights. Explore with us how far this correlated approach can exceed solutions focussing on just logs or traces.
We'll start by exploring how to process and index telemetry data with Data Prepper, making it ready for analysis, dashboarding, and alerting within OpenSearch.
You’ll learn effective strategies to map and correlate logs, metrics, and traces, unlocking deeper relationships between these signals.
Building on these correlations, we’ll showcase how OpenSearch can deliver advanced insights, enabling you to diagnose problems faster and make informed decisions.

Speakers

Karsten Schnitter

Software Architect, SAP SE

Karsten is a Software Architect at SAP. He works in the observabilty area of the SAP Business Technology Platform. Karsten is a member of the OpenSearch technical steering committee and maintainer of the Data Prepper project.

Wednesday April 30, 2025 14:20 - 15:00 CEST
Matterhorn

Analytics + Security + Observability

15:05 CEST

Transforming Data Aggregation in Opensearch: Achieving 100x Faster Performance - Ankit Jain & Sandesh Kumar, AWS

Wednesday April 30, 2025 15:05 - 15:45 CEST

Efficient data analysis and visualization heavily rely on the performance of aggregations in Opensearch. However, optimizing the performance of aggregations in the multi-phase and distributed nature of search queries poses significant challenges. In this session, we delve into the inner workings of the OpenSearch query engine, uncovering insightful examples and code walkthroughs that empower you to unlock the true potential of aggregation processing.
Discover clever techniques for identifying performance bottlenecks and gain a comprehensive understanding of smart query rewriting techniques like cardinality filtering, range slicing, early collection termination, and multi-range traversal. These advanced techniques offer a remarkable peek into the query engine's inner workings, enabling you to significantly enhance the speed and efficiency of data aggregation in Opensearch.
Prepare to revolutionize your data analysis workflows as you harness the power of these optimization strategies, propelling your aggregation performance to new heights. Experience the unprecedented speed and responsiveness of Opensearch, accelerating your data analysis and visualization tasks by an astounding 100x

Speakers

Sandesh Kumar

Software Developer, AWS

Sandesh is a Software Developer at AWS OpenSearch Service. He is also an active contributor to OpenSearch focused on Search performance & resiliency.

Ankit Jain

Software Engineer, AWS

Ankit Jain is a Software Engineer working on Amazon OpenSearch Service. He is an active contributor and a maintainer of OpenSearch.

Wednesday April 30, 2025 15:05 - 15:45 CEST
Matterhorn

Search

16:05 CEST

Partner Roundtable - By invitation only

Wednesday April 30, 2025 16:05 - 17:30 CEST

The Partner Roundtable is a great way to interact with OpenSearch leadership and have an open dialogue about the project. We will discuss strategy, challenges and opportunities, community and collaboration, future trends, training and enablement, and project growth. And of course, you are encouraged to openly exchange ideas and experiences, ask questions, share your thoughts, and engage in meaningful discussion.

By invitation only.

Wednesday April 30, 2025 16:05 - 17:30 CEST
Matterhorn

Partner Roundtable

09:30 CEST

Keynote Sessions To Be Announced

Thursday May 1, 2025 09:30 - 10:00 CEST

Thursday May 1, 2025 09:30 - 10:00 CEST
Matterhorn

Keynote Sessions

10:15 CEST

Uber’s Innovations in OpenSearch for a Cloud Native, Serverless Future - Pallavi Priyadarshini, Amazon Web Services & Yupeng Fu, Uber

Thursday May 1, 2025 10:15 - 10:55 CEST

In this session, Uber, a premier member of the OpenSearch Foundation, will share how the unique demands of their low-latency, high-throughput search platform have driven impactful contributions to the OpenSearch project.

The discussion will explore Uber’s collaboration with the OpenSearch community to integrate critical learnings and innovations from their own search platform. Key highlights include the development of a modular, cloud-native architecture with clear separation between readers and writers, a high-performance messaging protocol for inter-service communication, and a pull-based indexing model.

These advancements, along with contributions from the broader OpenSearch community, are shaping OpenSearch into a cutting-edge, serverless open-source search engine tailored for enterprise needs. Join this session to discover how pioneering work from Uber and OpenSearch is paving the way for the next generation of high performance and scalable search technology in open source.

Speakers

Pallavi Priyadarshini

Senior Manager, AWS

Pallavi Priyadarshini is a senior engineering manager at Amazon Web Services, leading engineering for high-performing and scalable search and security technologies for the OpenSearch Project and Amazon OpenSearch Service. Previously, she held leadership positions at IBM focused on... Read More →

Yupeng Fu

Principal Engineer, Uber Inc

Yupeng is a Principal Engineer at Uber and he leads Uber's Real-time Data and Search Platform. including multiple mission-critical services powered by several open-source technologies like Kafka/Flink/Pinot as well as a Search platform over Apache Lucene. Before Uber, he was a founding... Read More →

Thursday May 1, 2025 10:15 - 10:55 CEST
Matterhorn

Search

11:00 CEST

Cross-Reference Code Mapping System With Opensearch - Irine Benoy & Ismaël Hassane, Oracle

Thursday May 1, 2025 11:00 - 11:40 CEST

Leveraging OpenSearch, we propose a Cross-Reference Code Mapping System to dynamically map medical products across terminologies and regulatory frameworks. For example, it maps Paracetamol (UK) to Acetaminophen (US), including dosage details and regulatory codes. Using nested documents, the system efficiently stores and retrieves all related data. Semantic search enables queries like "pain relief tablets," returning relevant matches across terminologies.

Additionally, by incorporating Cross-Cluster Search, the system seamlessly queries datasets stored across multiple clusters, such as those dedicated to specific regions or regulatory frameworks. This ensures unified data access while maintaining localized storage and compliance with regional regulations. Cross-Cluster Search also ensures scalability, allowing new datasets or regions to be added incrementally without disrupting operations.

Powered by OpenSearch, this system improves data interoperability, enhances medication accuracy, reduces errors, and streamlines research workflows. Its scalable design adapts to the evolving needs of the global healthcare community.

Speakers

Irine Benoy

Open-Source Specialist, Oracle

Irine Benoy is an Open-Source Specialist at Oracle, empowering organizations across the EMEA region to leverage open-source technologies on Oracle Cloud Infrastructure for scalable, data-driven solutions. She helps businesses simplify complex architectures, optimize efficiency, and... Read More →

Ismaël Hassane

Cloud Solution Architect, ORACLE

Cloud Solution Architect with 10 years of experience, I specialize in data, analytics, and AI. In fact, I've held various positions as a developer and architect in both pre-sales and implementation roles. On a daily basis, I interact with a wide range of sectors across EMEA.

Thursday May 1, 2025 11:00 - 11:40 CEST
Matterhorn

Security Education + Community Development

11:45 CEST

Creating an API Definition for OpenSearch Retroactively - Pranav Garg & Sachet Jayaram Alva, Amazon

Thursday May 1, 2025 11:45 - 12:25 CEST

The standard way for creating APIs is to first define the API contract, use that to generate classes and write your application around it. But what happens when the application is already in place and is actively being used by millions around the world and does not have an API contract?

We faced this issue when we set out to find a single source of truth for OpenSearch APIs. Finding none and realizing that we need to create one, we set out on a journey to create asuch specification.

This talk will deal with:
* Experience with Jest client and frustration with freeform request bodies as a customer
* The stages of development including ideation, PoC, RFC, choosing the technologies, gaining consensus and implementation
* setting up the project and integration framework (while ensuring frugality and complete coverage)
* Opening up the project to community contribution after initial implementation
* Adoption by the clients team
* Switch from Smithy to OpenAPI based on community discussion
and the FUTURE!

Speakers

Pranav Garg

Software Development Engineer, Amazon

I am Pranav Garg, or PG. An aspiring polymath with interests in software development and theoretical neuroscience, I graduated from BITS Pilani Goa with a degree in Electrical & Electronics Engineering. I’ve been with Amazon for 5 years, starting with Value Added Services before... Read More →

Sachet Jayaram Alva

Software Development Manager, Amazon

I am a Software Development Manager at Amazon OpenSearch Service, where I lead the Infrastructure Security and custom package initiatives. My team focuses on enhancing the security posture and deployment flexibility of OpenSearch Service, enabling customers to build more secure and... Read More →

Thursday May 1, 2025 11:45 - 12:25 CEST
Matterhorn

Operating OpenSearch

13:25 CEST

Building an Open Source Observability Stack from Raw Telemetry - Joshua Lee, Altinity

Thursday May 1, 2025 13:25 - 14:05 CEST

This session will guide you through the process of building a complete observability stack from the ground up using raw telemetry data ingested directly into a datastore, combining a variety of open source signals including OpenTelemetry and Prometheus formats.

We’ll start by leveraging our existing telemetry for maximum effectiveness because telemetry without action is just storage. We'll delve into the aspects of creating OLAP cubes. We’ll use this data for creating insightful visualizations with tools like Perses.

Drawing from experience with proprietary and open source observability tools, we’ll then evolve our monitoring by adding application telemetry. We’ll use automations like eBPF to fully observe a massively distributed cloud database offering.

Whether you're starting from scratch or looking to enhance your existing observability infrastructure, join me to discover practical strategies that you can implement today.

Speakers

Joshua Lee

Developer Advocate, Altinity

Joshua is a seasoned software developer with over a decade of experience, specializing in a broad range of topics including operations, observability, agile methodologies, and accessibility. Currently, Joshua serves as a Developer Advocate for Altinity, where he creates educational... Read More →

Thursday May 1, 2025 13:25 - 14:05 CEST
Matterhorn

Analytics + Security + Observability

14:10 CEST

Security Monitoring of OpenSearch With OpenSearch - Nils Bandener, Eliatra & Craig Perkins, Amazon

Thursday May 1, 2025 14:10 - 14:50 CEST

One of the really cool aspects of OpenSearch is its ability to serve as a monitoring tool for itself. Let's have a look at how to piece together a monitoring solution for OpenSearch using components from the OpenSearch ecosystem such as Data Prepper and OpenSearch alerting. We will focus on security aspects like authentication and authorization.

Any software dealing with confidential data needs to have a security solution providing authentication and authorization. And any such security solution should have proper monitoring. OpenSearch is no exception in this regard.

In this presentation, we will look how to use components like Audit Logs, Data Prepper and OpenSearch Alerting to create a small, but effective security monitoring solution.

This will give us two benefits at once:

- A security monitoring solution
- Insights into the workings of components like Alerting, etc. by looking at a real world example

Speakers

Nils Bandener

Software Architect, Eliatra

Freelance software architect with long track record in security and infrastructure software. Interested in finding optimal solutions which combine broad functionality with a user-centric view. Track record of many years in security software via collaborations with Search Guard and... Read More →

Craig Perkins

Software Engineer, Amazon

Craig has been engaged with the OpenSearch community since June 2022 and focuses on the Security of the platform. Craig has an extensive software engineering background of 10 years that includes managing the search infrastructure for e-commerce websites and healthcare institutions... Read More →

Thursday May 1, 2025 14:10 - 14:50 CEST
Matterhorn

Operating OpenSearch

14:55 CEST

Beyond Similar: Building Diverse Search With MMR - Joinal Ahmed, ntg & Nikhil Rana, Google Cloud

Thursday May 1, 2025 14:55 - 15:35 CEST

In the era of vector search and semantic similarity, returning highly relevant results is only half the battle. When search results are too similar, users must wade through redundant information to find diverse perspectives. This talk introduces Maximum Marginal Relevance (MMR) implementation in OpenSearch, a powerful technique that optimally balances result relevance with diversity.

Key takeaways will include:
- Implementing MMR reranking with OpenSearch's vector search
- Optimizing performance for large-scale deployments
- Measuring and tuning diversity metrics
- Real-world applications and success patterns

Speakers

Joinal Ahmed

head of ai, ntg

Joinal is an experienced Data Science professional with a interest on building solutions with quick prototypes, community engagements and influencing technology adoption.

Nikhil Rana

AI Consultant, Google Cloud

Nikhil is an applied data science professional with over a decade of experience in developing and implementing Machine learning, Deep Learning, and NLP-based solutions for a variety of industries like Finance, FMCG, etc. He is a passionate advocate for the use of data science to solve... Read More →

Thursday May 1, 2025 14:55 - 15:35 CEST
Matterhorn

Search

15:50 CEST

Unlock NextGen Agentic Product Search With ML and LLM Innovations of OpenSearch - Praveen Mohan Prasad & Hajer Bouafif, AWS

Thursday May 1, 2025 15:50 - 16:30 CEST

In the realm of search, Machine Learning plays a pivotal role in enhancing the user experience throughout the entire lifecycle, from ingesting documents to delivering highly relevant results for user queries. This session will showcase various ML integrations of OpenSearch tailored to optimize outcomes for user queries in a retail scenario, accompanied by a live demonstration. We will explore cutting-edge techniques such as query understanding and rewriting using Large Language Models (LLMs), document enrichment, sparse, dense, and hybrid retrievers, as well as contextual re-ranking of results. As a highlight, you will learn how LLM agents and OpenSearch’s ML Search types can be integrated to build a AI shopping assistant that offers a conversational shopping experience for the users.

Speakers

Praveen Mohan Prasad

Analytics Specialist, AWS

Praveen Mohan Prasad is a search specialist with data science expertise who actively researches and experiments on using Machine Learning to improve search relevance. Praveen advices clients to implement and operationalise strategies to improve search experience.

Hajer Bouafif

Sr Solutions Architect @ AWS, AWS

Hajer Bouafif is a senior solutions architect in Data Analytics and ML search with a background in Big Data engineering. Hajer provides organizations with best practices and well-architected reviews to build large-scale Machine Learning search solutions.

Thursday May 1, 2025 15:50 - 16:30 CEST
Matterhorn

Search

16:35 CEST

How To Search 1 Billion Vectors in OpenSearch Without Losing Your Mind or Wallet - Fernando Rejon Barrera, Zeta Alpha

Thursday May 1, 2025 16:35 - 17:15 CEST

Scaling vector search to a billion vectors isn’t just a technical challenge—it’s a high-stakes balancing act of latency, cost, and quality. In this talk, I’ll share practical lessons learned from building a billion-scale system in OpenSearch, covering model selection, text processing, hardware essentials, and embedding strategies. But that’s not all: I’ll expose the tips, tricks, and gotchas you’ll need to navigate OpenSearch’s quirks without losing your sanity (or your wallet). Whether you’re scaling up or just getting started, this session will equip you to tame your vectors and succeed at scale.

Speakers

Fernando Rejon Barrera

CTO, Zeta Alpha

Fernando is the CTO of Zeta Alpha, an Amsterdam-based startup helping High-Tech and R&D Enterprises take their Generative AI projects to production. With a PhD in theoretical physics and a hacker (builder) past, Fernando brings a unique blend of theoretical knowledge and hands-on... Read More →

Thursday May 1, 2025 16:35 - 17:15 CEST
Matterhorn

Search

17:20 CEST

Keynote: Closing Remarks

Thursday May 1, 2025 17:20 - 17:30 CEST

Thursday May 1, 2025 17:20 - 17:30 CEST
Matterhorn

Keynote Sessions