rowan · product engineer at Keplr
“Pick something up.”
Wallet reliability, shielded UX, and protocols understood from the wire up.
01
wallet
A multi-chain wallet real people keep money in. Not the place to get clever.
Shipped Bitcoin, Swap v2, and EVM/Starknet support across Extension, Mobile, and Web.
Fee math and edge cases for money that is not mine to lose.
Scope
Extension · Mobile · Web
02
Zcash · privacy
A Zcash wallet built to make shielded transactions feel simple.
Built shielded-send flows where proof generation and sync state shape the interface.
Integrated NEAR Intents for cross-chain swaps and Keystone for air-gapped signing.
Scope
Flutter · Rust · Zcash
03
from scratch
A chapter-by-chapter Go implementation of Bitcoin, from finite fields to SegWit and networking.
Parsed the 80-byte block header by hand.
Implemented transactions, scripts, SegWit, and P2P networking chapter by chapter in Go.
Scope
Go · from scratch
About the builder
I read the spec twice and sweat the parts users never see. People keep real money in what I ship, which is a good reason to stay honest.
I work on fee math, failure modes, and the seams between UI and protocol code. I'm new to Zcash, and that's the fun part.
