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 fast 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.