Sergei Shulepov
Senior Scientist at Philips Apptech
Eindhoven, North Brabant, Netherlands
Summary
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Rockstar🎓
Top SchoolSergei Shulepov is a Senior Scientist with 13 years of software and research experience based in Eindhoven, blending deep academic grounding in theoretical physics and colloidal stability with hands-on systems engineering. He specializes in low-level back-end development and WebAssembly toolchains, contributing notable fixes and feature work to prominent open-source projects such as rust-bindgen, Cranelift, wasmtime and Polkadot/Substrate. His work often targets internals—code generation, memory and stack management, and Wasm build/runtime correctness—improving performance and reliability in blockchain and runtime ecosystems. At Philips he applies this systems-level expertise to research-driven engineering, bridging physics-informed thinking with practical software delivery. A quirk: his GitHub bio, “frobbing dang bits,” quietly captures his affinity for low-level tinkering and meticulous refactors.
13 years of coding experience
Theoretical physics, industrial optics, Theoretical physics, industrial optics at Kiev State UniversityTU Delft
Stackoverflow
2,237reputation
652kreached
50answers
5questions
android
top-5%
Github Skills (50)
substrate10
runtimes10
compiler-development10
testing10
interpreter10
refactor10
x8610
binding10
code-generation10
polkadot-js10
message-passing10
ethereum10
x86-6410
ffi10
blockchain10
Programming languages (21)
Github contributions (5)
wasmi-labs/wasmi
Jan 2018 - Mar 2021
WebAssembly (Wasm) interpreter.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:19 reviews, 255 commits, 202 PRs in 3 years 2 months
Contributions summary:Sergei primarily focused on refactoring the code base, migrating and updating the `Signature` type, and refactoring code related to function execution. The commits involved significant changes to the core modules, including `types`, `runner`, `module`, and `func`, indicating a focus on improving the internal workings of the WebAssembly interpreter. The user also implemented several tests, demonstrating a focus on ensuring code quality and correctness.
rustruntimewebassemblyinterpreterwasm
paritytech/substrate
Mar 2018 - Nov 2021
Substrate: The platform for blockchain innovators
Role in this project:Back-end Developer
Back-end DeveloperContributions:192 reviews, 173 commits, 247 PRs in 3 years 8 months
Contributions summary:Sergei primarily focused on enhancing the Substrate blockchain platform by addressing WebAssembly (Wasm) build issues, including fixing build errors in the executor and test runtime environments. They implemented optimizations such as reserving memory pages during initialization and enabling LTO compilation for improved Wasm performance. Additionally, the user refactored the Externalities to AccountDb. The user made other changes to the smart-contract, and the contract API.
substraterustblockchainparitypolkadot
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