Location: Toronto, Canada About the role Build and run the multi-chain Blockchain wallet and custody systems for our trading desk: keep funds safe and move them quick between wallets, exchanges and chains.

What you’ll do Build hot / warm / cold wallets across EVM, Solana, BTC, TRON.

Implement secure signing and key management: MPC/TSS, multisig, HSM.

Automate deposits, withdrawals and transfers, with whitelists and approval workflows.

Handle transaction construction, nonces, gas, stuck or failed transactions and reorgs.

Run nodes and RPC connections.

Monitor and reconcile on-chain and exchange balances, and raise alerts on anomalies.

Own wallet security and incident response.

Requirements Rust (must-have).

Go, C++ or Python is a plus. 3+ years building wallet, custody or payment systems in production.

Multi-chain: EVM plus at least one non-EVM chain.

Hands-on MPC/TSS, multisig or HSM signing.

Nodes, RPC, reorg and confirmation handling.

Bachelor’s degree in CS, Engineering or a related field.

Strongly preferred Wallet experience at an exchange, custodian or trading firm.

Exchange deposit/withdrawal APIs, cross-chain bridges.

Solidity / smart contracts.

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📌 Blockchain Wallet Engineer (Rust) (Toronto)
🏢 Mamoru
📍 Toronto