Siddarth Kumar

Building open-source infrastructure for a freer internet —> web systems, hardware wallets, and p2p networks.

Currently contributing to Logos and its ecosystem: Waku, Codex, Nimbus, and Nomos.

Frontend & Design Systems -> Next.js web platforms, component libraries, Docusaurus plugins, design tokens
Blockchain & Web3 -> Ethereum clients, beacon chain, smart contracts
Hardware Wallets -> Keycard ecosystem (Go, Java, Swift, Kotlin, C)
Infrastructure -> NixOS, CI/CD pipelines, Ethereum staking on Holesky & Lido

React Native × Native Backends

Project	Description	Stars
syncthing-app	SyncUp -> open-source Syncthing client for iPhone and Android, with the daemon embedded via gomobile
react-native-go	Starter template bridging a Go backend with a React Native client
react-native-nim	Starter template connecting a Nim backend with React Native

Hardware Wallets & Embedded

Project	Description	Stars
status-keycard	JavaCard smart wallet for secure Ethereum transactions
keycard-shell	Modular, fully open-source hardware wallet
keycard-cli	CLI tool for managing Keycards
keycard-go	Go library for Status Keycard
react-native-status-keycard	React Native NFC library for Keycard

Web & Infrastructure

Project	Description	Stars
status-app	Status App client -> React Native & QML
nimbus-eth2	Nim implementation of the Ethereum Beacon Chain
logos-press-engine	Logos Press Engine website
nimbus-eth1-benchmarks	Eth1 import benchmark metrics for Nimbus

Open Source Contributions

Project	Contribution	Stars
facebook/react-native	Codegen refactoring -> abstracted parser logic into shared commons
status-im/status-go	CI fixes, Nim SDS build fixes, cross-platform path handling
OffchainLabs/hashtree	Fixed macOS assembler compatibility with LLVM 21+, used in Nimbus