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Top 15 Apache Cassandra Experts Ready to Join

cassandra experts - Top 15 Apache Cassandra Experts Ready to Join

Apache Cassandra has become a cornerstone technology for building scalable, distributed applications.

This list highlights the most influential figures driving the evolution of AC today. From core committers and longtime PMC members to authors, tool builders, and infrastructure leaders at companies like Apple, Netflix, and Meta, these experts have shaped Cassandra’s journey from its origins to a modern, production-grade database powering massive workloads.

  1. Patrick McFadin

  2. Jonathan Ellis

  3. Sylvain Lebresne

  4. Nate McCall

  5. Aaron Morton

  6. Jake Luciani

  7. Jeff Jirsa

  8. Josh McKenzie

  9. Dinesh Joshi

  10. Benedict Elliott Smith

  11. Blake Eggleston

  12. Alex Petrov

  13. Sankalp Kohli

  14. Jon Haddad

  15. Brandon Williams

Now, let’s delve deeper into their remarkable careers and contributions.

Patrick McFadin

YouTube Video

Nationality: American

Patrick is one of Cassandra’s most recognized advocates and educators. As a long-time DataStax strategist (and now VP Developer Relations) and an Apache Cassandra committer, he has tirelessly promoted best practices for Cassandra in blogs, conference talks, and webinars.

McFadin has helped thousands of developers grasp Cassandra’s data modeling and scaling techniques, earning him a reputation as “the face of Cassandra” in the community. He also contributes to project direction as a recently added Apache Cassandra PMC member. Whether through his technical blog posts or the popular Cassandra Accelerate and Summit sessions he leads, Patrick bridges the gap between Cassandra’s core development and its users.

Jonathan Ellis

Nationality: American

As the co-founder and former CTO of DataStax (the company that builds products around Cassandra) and the inaugural Chair of Apache Cassandra’s Project Management Committee, Ellis played a pivotal role in Cassandra’s early success.

He led Cassandra’s development for years, helping transform it from a Facebook prototype into a production-ready open-source database. Under his leadership the community grew and Cassandra was re-architected for higher scalability (introducing features like CQL, secondary indexes, etc.). Even after stepping back from the chair role in 2016, Ellis remains an active voice in the community and continues to work on distributed data problems (recently founding a new developer tools startup).

Sylvain Lebresne

Cassandra is not just about availability or scalability—it’s about making the right trade-offs for real-world applications.

Nationality: French

Lebresne has been one of Cassandra’s most influential contributors on the technical side. A former DataStax engineer, he became an Apache Cassandra committer around 2010 and served as a release manager for the project.

Sylvain’s fingerprints are on many core features: he helped design the storage engine and write path, implemented features like leveled compaction and lightweight transactions (Paxos), and co-authored the CQL query language. He is known for his thorough knowledge of distributed systems theory applied to Cassandra’s code. Lebresne remains on the Cassandra PMC and continues to contribute improvements and review major changes. His focus in recent years has included efforts like NodeSync (automated repair) to improve reliability.

Sylvain’s long-term commitment and technical depth have made him a Cassandra guru whose posts and talks are highly respected in the community.

Nate McCall

Nate McCall - Top 15 Apache Cassandra Experts Ready to Join

Nationality: American

McCall has been instrumental in the Cassandra ecosystem both as a technical contributor and community leader. He co-founded The Last Pickle, a consulting firm dedicated to Cassandra, where he helped companies deploy and optimize Cassandra at scale.

Nate became the Apache Cassandra PMC Chair in 2016, succeeding Jonathan Ellis and broadening community contributions. As PMC chair he worked to expand the committer base and encourage major users like Netflix to contribute back. Technically, Nate has contributed code (he’s been a committer since Apache Cassandra 0.x days) and shared operational wisdom (e.g. via conference talks on security and performance).

He continues to actively code on Cassandra and mentor new contributors as part of Apple’s Cassandra team post-DataStax acquisition of The Last Pickle.

Aaron Morton

Nationality: New Zealander

Morton was one of the first independent Cassandra experts, starting as an early open-source contributor in 2010 and later founding The Last Pickle in 2011 to provide professional Cassandra consulting.

He implemented critical features and fixes in the Cassandra code (and even authored a popular utility for memory monitoring). Aaron is known for his deep knowledge of Cassandra internals – he wrote and spoke extensively about Cassandra’s architecture (compactions, GC tuning, etc.) and co-authored many community tools. His firm was acquired by DataStax in 2020, a testament to its impact. Morton has mentored many engineers in the community and remains active in open-source development and design discussions for Cassandra’s future.

Jake Luciani

Nationality: American

Luciani has been part of Cassandra’s core developer team since the project’s early days and continues to push its technical evolution. He became a committer over a decade ago and was instrumental in integrating Cassandra with other big-data technologies – for example, he led development of “Brisk” (Cassandra + Hadoop) and “Solandra” (Cassandra + Solr).

Jake also co-founded a machine learning startup (TupleJump) acquired by Apple, but remained dedicated to Cassandra open source throughout. He serves on the Apache Cassandra PMC and has contributed to recent innovations like Kubernetes deployments and new storage engine concepts. Now a Chief Architect at DataStax, Luciani balances hands-on coding with guiding Cassandra’s roadmap. He is one of the rare Cassandra pioneers still actively writing code for the project year after year.

Jeff Jirsa

Jeff Jirsa - Top 15 Apache Cassandra Experts Ready to Join

Nationality: American

Jirsa has been an active Cassandra contributor and community figure for many years. Recognized as a Cassandra MVP in 2015–2016 for his community contributions, Jeff has worked with Cassandra in varied environments – from cybersecurity (CrowdStrike) to cloud services (he’s now at Apple, focused on Cassandra).

He contributed the Time Window Compaction Strategy (TWCS) for time-series optimizations and has been involved in countless bug fixes and improvements on the project. Jirsa also served on the Apache Software Foundation’s board, bringing his Cassandra experience into broader open-source leadership. He is a frequent speaker at Cassandra conferences, sharing operational war stories and best practices for running Cassandra at scale.

Jeff’s mix of coding prowess and community advocacy has made him a core member of the Cassandra ecosystem.

Josh McKenzie

Nationality: American

McKenzie has been deeply involved in Cassandra development and governance. An Apache Cassandra committer since 2014, he eventually became PMC Chair (VP Apache Cassandra) and led the project through the Cassandra 4.0 release cycle.

Technically, Josh contributed in areas like Windows support and testing infrastructure, and he often acted as release manager for beta releases. He later joined DataStax to head open-source strategy, ensuring the company’s engineering efforts aligned with the Apache project. McKenzie’s tenure as chair was marked by reinvigorating the community and maintaining quality for the long-awaited 4.0 version. After passing on the chair role, he remains a vocal PMC member and continues to guide Cassandra’s future (recently, he joined Apollo GraphQL, but still contributes to Cassandra).

Dinesh Joshi

The future of Cassandra is bold—zero copy streaming, a pluggable architecture, and the scale to power the world’s most demanding workloads.

Nationality: Indian

Joshi is the current PMC Chair of Apache Cassandra, responsible for project oversight and releases. At Apple, he leads a team of engineers working on Cassandra improvements at massive scale – under his guidance Apple has contributed significant enhancements (such as Zero Copy streaming and Sidecar services).

Dinesh has a background in distributed systems and has been a committer on Cassandra for years. As PMC Chair, he has championed a forward-looking roadmap (Cassandra 5.0 and beyond) and fostered collaboration between major corporate users in the project. He’s also an active speaker, presenting deep dives on Cassandra internals (storage, analytics, etc.) at conferences. His blend of hands-on engineering and community leadership makes him one of today’s top Cassandra experts.

Benedict Elliott Smith

Benedict Elliott Smith - Top 15 Apache Cassandra Experts Ready to Join

Nationality: British

Benedict is known for his deep contributions to Cassandra’s performance and forthcoming features. Originally at DataStax and now part of Apple’s Cassandra research team, he has been a driving force in modernizing Cassandra’s codebase.

He spearheaded the development of Accord, a new consensus protocol to bring ACID transactions to Cassandra, working alongside colleagues at Apple. Benedict has a keen focus on performance; he’s responsible for numerous optimizations in compaction, memory management, and coordination logic over the years. He joined the project in 2013–2014 and quickly became one of the most active contributors on the mailing list, often tackling complex bugs. His recent work on simulation testing frameworks and transactional semantics is set to push Cassandra into its next generation.

Blake Eggleston

Nationality: American

Eggleston is at the forefront of Cassandra’s most cutting-edge development. Formerly at DataStax and now at Apple, he was one of the co-authors of the Accord transaction protocol paper for Cassandra (enabling linearizable ACID transactions).

Blake has contributed significant code to Cassandra’s core; he worked on the 4.0 release (such as improving consistency semantics and repair) and is known for redesigning the internals of Paxos/LWT to be more robust. In the Cassandra 5.0 time frame, Eggleston has been active in implementing consensus changes and other CEPs (Cassandra Enhancement Proposals). He often presents at ApacheCon and Cassandra Summit on topics like transient replication and future storage engines. Blake’s work bridges academic research and practical engineering, helping Cassandra evolve to meet new demands without sacrificing its proven strengths.

Alex Petrov

Alex Petrov - Top 15 Apache Cassandra Experts Ready to Join

Nationality: Ukrainian

Petrov is a database engineer and a prominent voice in the Cassandra community, known for demystifying complex concepts. He became a Cassa committer while working on cloud storage systems and went on to write “Database Internals” (O’Reilly), a book that uses Cassandra among other systems to explain how distributed databases work.

Alex has contributed to Cassandra’s code and also to its ecosystem – for example, he worked on the Kubernetes operator at Apple and on open-source libraries to integrate Cassandra with other tools. Petrov’s competitive programming experience (in Ukraine) and academic approach allow him to tackle Cassandra’s hardest problems, like consistency edge cases and performance optimization. He actively shares knowledge via his blog and Twitter, and often engages with the community to answer questions on data modeling.

Alex’s blend of practical skill and educational impact makes him a top expert in Cassandra.

Sankalp Kohli

Nationality: Indian

Sankalp has led large teams dedicated to Cassandra at both Apple and Facebook (Meta). As a committer and PMC member since 2016, he contributed extensively to Cassandra’s storage engine and consistency mechanisms.

At Apple, he headed the group that contributed major features to open source (including audit logging and performance optimizations). Now at Meta, he oversees the team that operates and extends Cassandra for Facebook’s enormous workloads. Kohli’s background also includes competitive programming, and he brings that analytical rigor to database engineering. He has shared experiences of running thousands of Cassandra nodes and has been an advocate for Cassandra within the developer community (often answering questions on mailing lists and forums). His cross-industry perspective (Apple, AWS, Facebook) makes his insights especially valuable.

Jon Haddad

Jon Haddad - Top 15 Apache Cassandra Experts Ready to Join

Nationality: American

Haddad is a veteran in the Cassandra world, recognized for both his technical contributions and community leadership. He has worked with Cassandra at multiple organizations – he was a DataStax evangelist, a Principal Consultant at The Last Pickle, ran Cassandra at Apple, and now is part of Netflix’s data engineering team.

Jon became a committer and PMC member and has contributed features like the Java driver improvements and numerous bug fixes. He’s perhaps even more famous for educating others: Jon ran the popular rustyrazorblade blog and co-created cassandra.link, curating Cassandra articles. He’s given talks on everything from data modeling to garbage collector tuning in Cassandra. Haddad’s breadth of hands-on experience (helping users of all sizes, from startups to Netflix) and his approachable teaching style have made him a go-to expert in the community.

He remains active on forums and at events, continuing to mentor the next generation of Cassandra users and contributors.

Brandon Williams

Nationality: American

Williams has been a long-time Cassandra committer (since around 2010) and is known in the community for his practical tools and expertise in troubleshooting. As a DataStax engineer and PMC member, Brandon has authored many utilities, including contributions to nodetool and the popular cassandra-diagnostics tool.

He was involved in testing and fixing many of the difficult edge cases in Cassandra’s clustering and hinted handoff processes, and he remains very active in reviewing patches (his name appears in commit logs even in 2024–2025). Brandon is also famous for his witty and insightful answers on Cassandra user forums and his talks on performance benchmarking. He co-authored the third edition of “Cassandra: The Definitive Guide”, distilling his deep operational knowledge for others. Within DataStax, he’s often the go-to person for replicating and solving hairy performance issues.

Wrap Up

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