Yuji Ito
Technical Advisor at Scalar, Inc.
Berlin, Germany
Summary
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Rockstar🎓
Top SchoolYuji Ito is a Technical Advisor and seasoned software engineer with a decade of experience building and hardening high-performance distributed systems, from SSD firmware to proof-of-stake blockchains. Based in Berlin, he specializes in failure analysis, performance tuning, and verification (Jepsen) for critical data infrastructure and currently contributes to Namada’s IBC-enabled privacy-focused L1. He has deep systems-level expertise across Rust, C/C++, Java, Clojure and Go, and a track record integrating cloud databases (Cosmos DB, DynamoDB) with ACID semantics via ScalarDB. His work spans academia-grade microarchitecture research at the University of Tokyo to production contributions like improving Hermes’ IBC relayer backend and proposing a Cassandra commitlog sync policy adopted in Cassandra 4.0. Known for turning obscure edge-case failures into reproducible tests, he blends firmware-level reliability thinking with modern blockchain interoperability.
10 years of coding experience
14 years of employment as a software developer
University of Tokyo
Japanese, English
Stackoverflow
123reputation
4kreached
8answers
1question
Github Skills (13)
rust10
protobuffer10
blockchain10
protobuf10
tendermint9
cosmos9
testing8
clojure6
scalardb6
azure6
scalardl6
azure-cosmos-db6
java6
Programming languages (11)
Github contributions (5)
informalsystems/hermes
Jul 2021 - Aug 2022
IBC Relayer in Rust
Role in this project:
Backend Developer
Backend DeveloperContributions:14 reviews, 12 commits, 17 PRs in 1 year
Contributions summary:Yuji primarily focused on implementing and modifying core backend logic, specifically related to the Inter-Blockchain Communication (IBC) protocol within the Hermes relayer project. Their contributions included adding functionality, such as implementing protobuf for specific components, and fixing bugs, such as setting a capability index. The user also refactored code and added tests to improve the robustness of the codebase and ensure proper functionality.
rustblockchainibccosmosrelayer
heliaxdev/hermes
Mar 2023 - Mar 2025
IBC Relayer in Rust
Contributions:9 reviews, 49 PRs, 218 pushes in 2 years
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