Sylvain Lebresne
Software Engineer at Archetype AI
Brittany, France
Summary
🤩
Rockstar🎓
Top School
Top expert inDistributed Data Systems and Analytics Technology
Sylvain Lebresne is a software engineer with 15 years' experience specializing in distributed databases and backend systems, currently working at Archetype AI from Brittany, France. He has deep expertise in Cassandra and database persistence—evident from long tenure at DataStax/IBM and contributions as an Apache Cassandra committer and to tooling like cassandra-ccm. At Apollo GraphQL he enhanced the federation query planner with practical debugging features, and he contributed core backend work to the open-source Stargate data gateway, showing a focus on data access, schema handling, and performance. With a PhD in computer science and a background in research and protocol engineering, he blends rigorous academic foundations with production-grade engineering. Colleagues can expect a pragmatic engineer who surfaces hard-to-observe runtime behaviors through targeted tooling and incremental refactors.
15 years of coding experience
21 years of employment as a software developer
Ph.D., Computer Science, Ph.D., Computer Science at Université Paris CitéMaster, Computer Science, Master, Computer Science at Paris-Sud University (Paris XI)
Github Skills (27)
debugging10
debug10
javascript10
python10
cassandra10
apollo-federation10
wpgraphql10
java10
javas10
wordpress-graphql10
graphql10
cql10
admin9
command-line-interface9
database-administration9
Programming languages (7)
Github contributions (5)
apache/cassandra-ccm
Apr 2011 - Dec 2016
A script to easily create and destroy an Apache Cassandra cluster on localhost
Role in this project:
Back-end Developer
Back-end DeveloperContributions:173 commits, 2 PRs, 3 pushes in 5 years 8 months
Contributions summary:Sylvain primarily contributed to the `apache/cassandra-ccm` repository, a tool for managing Cassandra clusters. Their work involved adding and modifying commands related to managing and interacting with Cassandra nodes, including features like sstable2json options, disabling hinted handoff, and adding the ability to run cqlsh. The user also addressed issues related to the binary protocol and code improvements in support of the overall CCM tool.
cassandralocalhostapachecassandra-clusterapache-cassandra
apollographql/federation
Mar 2021 - Jan 2023
🌐 Build and scale a single data graph across multiple services with Apollo's federation gateway.
Role in this project:Back-end Developer
Back-end DeveloperContributions:445 reviews, 303 commits, 278 PRs in 1 year 10 months
Contributions summary:Sylvain contributed to the Apollo Federation project by adding debugging features to the query planner, enabling conditional logging by setting environment variables. They modified the code to implement the logging facilities with a simple way to indent the messages, adding initial logging to the query planning code to follow the planning steps. Furthermore, the user refactored the code, moving the QueryPlanningContext class to its own file and adjusting to add the new features.
graph-datascaleapollo-federationgatewayfederation
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