Han Ju
Senior Software Engineer at Datadog
Paris, Ile-de-France
Summary
👤
Senior🎓
Top SchoolHan Ju is a senior software engineer with 13 years of experience building large-scale, data-centric distributed systems, currently at Datadog after leading machine learning platform efforts at Teads. He specializes in Scala, Spark, Kafka and cloud-native architectures on AWS, with practical production experience delivering high-throughput prediction systems (20M predictions/s) and robust data pipelines. At Botify he designed query DSLs and workflow execution components for web-scale analysis, and earlier work includes prototyping distributed graph and frequent-pattern solutions for real-world datasets. A polyglot hacker (Java, Python, Go, C, Scheme) and long-time Emacs/Linux user, he’s pursuing Haskell next and maintains side projects on GitHub that reflect his interest in applied data engineering and tooling. Fluent in Chinese, French and English, he combines hands-on implementation with performance tuning and pragmatic system design.
13 years of coding experience
9 years of employment as a software developer
Diplome d'ingénieur, Computer Science, Diplome d'ingénieur, Computer Science at Université de Technologie de CompiègneExchange Student, Computer Science, Master, Exchange Student, Computer Science, Master at Ecole polytechnique fédérale de Lausanne
French, English, Chinese
Stackoverflow
2,841reputation
647kreached
5answers
50questions
Github Skills (88)
python10
launcher10
lsm-tree10
r10
sql10
sbt-plugin10
spark10
dataflow-programming10
storage10
java10
scala10
jupyter-kernels10
jdbc10
scalajs10
aws10
Programming languages (7)
Github contributions (5)
darkjh/mini-lsm
Jan 2024 - May 2025
A tutorial of building an LSM-Tree storage engine in a week!
Contributions:7 PRs, 44 pushes, 9 branches in 1 year 4 months
darkjh/powerline-shell-scala
Jun 2013 - Feb 2016
Contributions:33 commits, 1 push in 2 years 8 months
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