Samuel Onoja

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Hey, I’m Sami. I’m a Rust/Go systems engineer focused on backend infrastructure, WebAssembly, wallet protocols, and performance. I started in full-stack web development, then moved into systems work at Komodo, where I built DeFi backends in Rust and Go.

I’m looking for my next role in Rust, backend systems, infrastructure, WebAssembly, or developer tooling.

Some of my recent work: I ported ARRR/Zcash wallet support to WASM/browser targets in Komodo DeFi Framework, including async wallet sync, IndexedDB storage, and WASM-compatible transport. I built WalletConnect v2 support in Rust for EVM and Cosmos chains. I improved REVM JumpTable lookup performance by 7.9x, from 9.4M to 74.6M ops/sec. I added a Rust Clippy lint for bindings cast to the same type at every usage site, suggesting the right type at definition.

I also built an LC-3 virtual machine in Rust to explore instruction decoding, memory, registers, and traps. I built paged-small-vec, an experimental Rust container mixing inline storage with fixed-size heap chunks.

Work

Rust Software Engineer @ Komodo Platform

May 2022 - 2025

Built Rust and Go infrastructure for Komodo’s DeFi backend, with a focus on browser-compatible blockchain support, wallet correctness, swap reliability, and runtime tooling.

• Delivered ARRR/Zcash browser support with WASM, IndexedDB wallet storage, async sync, and gRPC-web transport. #1957, #1996
• Fixed shielded-wallet sync and accounting bugs around unconfirmed change outputs and z-note tracking. #2276, #2331
• Built WalletConnect v2 support for EVM and Cosmos/Tendermint activation, withdrawals, swaps, and session persistence. WC #3, #2223
• Improved SPV/UTXO reliability with IndexedDB header storage, chain-reorg recovery, confirmation fixes, and swap validation. #1644, #1728
• Hardened browser/runtime paths for IndexedDB cursors, WebSocket validation, wallet RPCs, HD signing, and external-wallet startup. #2028, #2411
• Maintained Rust tooling and architecture, including enum derive macros, safer lazy init, rustc compatibility, and 28-44% faster measured builds. #1502, #2449

Fullstack Engineer @ DDW

April 2020 - May 2022

• Built full-stack magazine sites with WordPress, Next.js, and TypeScript.
• Developed membership areas with authenticated access, gated content, account flows, and CMS-backed publishing.
• Improved performance, responsive UI, content modeling, and frontend/backend handoff for editorial teams.

Contact

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