Pascalย Deย Kloe
Software Engineer at DELTA Fiber
The Hague, South Holland, Netherlands
Summary
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RockstarPascal De Kloe is a pragmatic software engineer with 15 years of experience building high-performance, data-heavy systems across cloud, IoT, blockchain and trading domains. He combines deep Go and backend expertise with hands-on work in Kubernetes, Kafka, timeseries databases and low-latency primitives (epoll/kqueue), shipping production systems for companies from eBay and ASML to Northvolt and Delta Fiber. An active open-source contributor, he has improved core Go libraries and helped benchmark JVM serializers while contributing optimizations to Ethereum and Go projects, reflecting a focus on measurable performance gains. Pascal prefers simplifying complex problems without losing necessary detail, and he frequently works on protocol-level and serialization optimizations that yield tangible efficiency improvements. Based in The Hague, he operates comfortably between startup and enterprise environments, often as a freelance engineer or short-term specialist driving critical delivery. His background shows a recurring pattern: tackle hard infrastructure challenges, reduce resource usage, and keep tooling current with state-of-the-art libraries.
15 years of coding experience
21 years of employment as a software developer
Dutch, swiss-german, English, German
Stackoverflow
552reputation
31kreached
20answers
8questions
Github Skills (33)
json10
benchmark10
jvm10
benchmarking10
data-serialization10
java10
serialization10
javas10
go10
ethereum10
blockchain10
net9
http9
protobuffer9
protobuf9
Programming languages (16)
Github contributions (5)
eishay/jvm-serializers
May 2016 - Jul 2020
Benchmark comparing serialization libraries on the JVM
Role in this project:
Back-end Developer
Back-end DeveloperContributions:35 commits, 12 PRs, 16 pushes in 4 years 3 months
Contributions summary:Pascal's contributions primarily revolve around adding and upgrading various serialization libraries for the JVM. They integrated the Colfer serialization library, ensuring compatibility with the project's benchmarking goals. Furthermore, the user updated existing serialization implementations (e.g., upgrading protostuff and protobuf), reflecting a focus on maintaining and improving the project's library comparison capabilities. These updates and integrations suggest an effort to keep the benchmark current with the latest serialization technologies.
jvmserialization
ethereumproject/go-ethereum
Jan 2017 - Apr 2017
Go language implementation of the original/classic design of the Ethereum protocol
Role in this project:Back-end Developer
Back-end DeveloperContributions:187 commits, 59 PRs, 27 pushes in 2 months
Contributions summary:Pascal primarily focused on refactoring and optimizing the core logic for the Ethereum protocol implementation. Their contributions involved grouping p2p distance calculations into dedicated files and further refactoring the p2p distance calculations for efficiency. The user also made improvements to the internal workings of the downloader and other supporting data structure components.
ethereumgo-languageblockchainethereum-classic
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