Samuel Onoja

• github
• posts
• projects
• rss

Hey! I’m Sami; I write Rust, Go, and sometimes C for fun. I like building tools and understanding how things work at a low level.

Started out building digital publications at DDW, then transitioned to systems programming at Komodo working on DeFi backends. Now I’m contributing to rust-clippy and building Khoomi, an African marketplace for handmade goods.

Notable Contributions

Zcash/ARRR WASM Implementation - Komodo DeFi Framework

Ported the Zcash protocol (ARRR coin) to WASM for browser-based transactions. Refactored librustzcash for async, added IndexedDB wallet storage, and built a WASM-compatible gRPC transport. View PR | librustzcash

WalletConnect v2 Integration - Komodo DeFi Framework

Integrated WalletConnect v2 Protocol in Rust and implemented for EVM and Cosmos chains. Handles multi-session, persistent storage, and Sign & Pairing APIs. View PR | WalletConnectRust

REVM - Performance Optimization

7.9x speedup in JumpTable lookups (9.4M → 74.6M ops/sec). View PR

Rust - needless_type_cast lint

New lint that detects bindings cast to the same type at every usage site, suggesting the correct type at definition. View PR

Professional Experience

Rust Software Engineer @ Komodo Platform

May 2022 - 2025

Worked on Komodo’s DeFi core backend, building blockchain applications in Rust and Golang:

• Integrated the Z/Pirate Coin protocol for web-based trading using WebAssembly
• Integrated WalletConnect protocol into Komodefi
• Enhanced Bitcoin Light Client (SPV) with critical fixes and improvements
• Developed EnumFromStringify, an internal Rust macro tool for improved enum and error handling
• Contributed to various blockchain protocol implementations (UTXO, ETH, etc.)

Fullstack Engineer @ DDW

April 2020 - May 2022

• Built magazine websites with WordPress, NextJS & TypeScript
• Developed membership platform for UK/US users
• CSSDA UI/UX Award (June 2020)

Some Open Source

• rustlibzcash - Zcash protocol in Rust
• WalletConnectRust - WalletConnect protocol in Rust
• Rust - cargo fmt, rust-clippy
• rustaceanvim - Neovim Rust plugin
• eza - modern ls replacement
• MongoDB - BSON Rust implementation
• Penumbra - Cosmos privacy blockchain
• Khoomi - Golang e-commerce API

When I’m Not Coding

Games: CoD, Genshin Impact, FIFA

Music: Pop Country, CCM, nightcore, Afrobeats, Pop — Sasha Sloan, Amanda Cook, Tauren Wells, Luke Combs, Morgan Wallen, Magixx, Llona, Zoe Wees, Griff.

Contact

• Email: 0@sot.dev
• GitHub: @borngraced
• Location: Lagos, Nigeria