Yohann Rubinsztejn
Full-stack Developer at Emeria Technologies
Greater Paris Metropolitan Region France
Summary
👤
Senior🎓
Top SchoolYohann Rubinsztejn is a pragmatic full-stack developer with 13 years of experience building high-throughput, data-driven systems and SaaS platforms across Java, Scala, JavaScript/TypeScript and modern cloud tooling. He has led the design and implementation of a real-time ad-serving and personalization engine handling 100M+ daily impressions, and more recently helps ship turnkey French SaaS products and Node/React systems at Emeria Technologies. Comfortably spanning backend, frontend and data layers, he’s skilled in PostgreSQL, Cassandra, Elasticsearch, Spark and containerized DevOps workflows, and actively contributes to critical open-source work such as improving the Apache Cassandra–Spark connector’s data distribution and testing. A disciplined TDD and pair-programming practitioner, he’s known for writing libraries, catching bugs early and streamlining complex integrations. Fluent in both pragmatic product delivery and low-level performance thinking, he enjoys algorithms, ML and cryptography—details he leverages to optimize systems beyond obvious bottlenecks. Based in Greater Paris, he’s available for freelance engagements that require robust engineering and architecture expertise.
13 years of coding experience
12 years of employment as a software developer
Classes Préparatoires aux Grandes Ecoles (C.P.G.E.), MPSI - MP, Classes Préparatoires aux Grandes Ecoles (C.P.G.E.), MPSI - MP at Lycée Condorcet, ParisMaster of Science (MSc), Advanced Computer Science, Distinction, Master of Science (MSc), Advanced Computer Science, Distinction at The University of ManchesterDiplôme d'ingénieur (Master's degree), Diplôme d'ingénieur (Master's degree) at ENSIIE - École Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise
French, English
Github Skills (10)
databases10
spark10
relational-databases10
cassandra10
sql-database10
database10
scala10
testing9
integration-testing9
data-modeling9
Programming languages (4)
Github contributions (5)
apache/cassandra-spark-connector
Feb 2021 - Mar 2021
DataStax Connector for Apache Spark to Apache Cassandra
Role in this project:
Back-end Developer / Database Engineer
Back-end Developer / Database EngineerContributions:6 commits, 2 PRs, 3 comments in 4 days
Contributions summary:Yohann primarily focused on improving the Cassandra Spark Connector's internal logic and data handling. Their contributions included refactoring configuration checks and optimizing connector instantiation, streamlining existing code. They addressed issues related to data center node retrieval and integrated comprehensive integration tests for replica repartitioning, ensuring data integrity and performance. These changes demonstrate a strong understanding of the connector's architecture and data distribution within a Cassandra cluster.
cassandraconnectorsparkscaladatastax
yohannrub/jquery.svg-pietimer
Jan 2013 - Jan 2013
Contributions:11 commits, 1 push in 17 days
jquery-pluginjquerysvg
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