Blockchain Wallet Engineer (Rust)

As a Blockchain Wallet Engineer at Mamoru, you build and run multi-chain wallet and custody systems for our trading desk. You keep funds safe and move them fast between wallets, exchanges and chains, working from Toronto, Canada.

What you'll do

• Build hot, warm and cold wallets across EVM, Solana, BTC and TRON
• Implement secure signing and key management using MPC/TSS, multisig and HSM
• Automate deposits, withdrawals and transfers with whitelists and approval workflows
• Handle transaction construction, nonces, gas management, stuck or failed transactions and reorgs
• Run nodes and RPC connections
• Monitor and reconcile on-chain and exchange balances, raising alerts on anomalies
• Own wallet security and incident response

What you bring

• Rust (required)
• 3+ years building wallet, custody or payment systems in production
• Multi-chain experience: EVM plus at least one non-EVM chain
• Hands-on experience with MPC/TSS, multisig or HSM signing
• Knowledge of nodes, RPC, reorg and confirmation handling
• A bachelor's degree in computer science, engineering or a related field

Nice to have

• Wallet experience at an exchange, custodian or trading firm
• Experience with exchange deposit and withdrawal APIs, cross-chain bridges
• Solidity or smart contract development
• Go, C++ or Python