Flavien Raynaud
Software Engineer at Pennylane
France
Summary
🤩
Rockstar🎓
Top SchoolFlavien Raynaud is a software engineer with 12 years of experience building high-throughput distributed systems and platform services, currently based in France and working at Pennylane. He has driven large-scale infrastructure projects at Yelp—like Kafka migrations, a 1M events/sec ingestion pipeline, and a >10x serialization speedup by introducing Rust FFI—and led platform and product initiatives at Airtasker that cut costs, improved reliability, and unlocked multi-million dollar revenue. Fluent across backend stacks, he contributed core features to the Rust implementation of the widely used Apache Avro project, adding compression codec support and robust handling of defaults for serialization. Known for pairing hands-on engineering with cross-functional leadership, he has repeatedly modernized monoliths into observable, cost-effective services and mentored teams on reliability and observability. With an academic background in AI and CS from CY Cergy Paris Université and CY Tech, he blends rigorous problem-solving with practical delivery at scale.
12 years of coding experience
9 years of employment as a software developer
CY TechMaster of Science (MSc), Artificial Intelligence, MADOCS, Master of Science (MSc), Artificial Intelligence, MADOCS at CY Cergy Paris Université
Github Skills (5)
avro10
data-serialization10
rust10
serialization10
big-data9
Programming languages (10)
Github contributions (5)
apache/avro
Dec 2017 - Feb 2021
Apache Avro is a data serialization system.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 83 commits in 3 years 2 months
Contributions summary:Flavien contributed to the Apache Avro data serialization system by implementing core features and fixing bugs within the Rust implementation. Their work included enhancing the serialization process by handling default values for missing fields. Additionally, they added support for compression codecs such as Deflate and Snappy, improving the system's performance and flexibility. Furthermore, the user implemented serialization for types::Value and types::Record, implementing the core functionality for serialization.
avrobigdatadotnetpythonrust
flavray/avro-rs
Aug 2018 - Feb 2021
Avro client library implementation in Rust
Contributions:11 reviews, 3 commits, 47 PRs in 2 years 6 months
rustavroclient-libraryparquet
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.