Arenema is hiring a Crypto / Blockchain Developer to join a fast-moving fintech engineering team building a custodial digital-asset platform — on/off-ramp, cross-chain swaps, streaming payments and stablecoin operations across multiple EVM networks.

This is a hands-on, backend-leaning role for an engineer who is genuinely comfortable at the intersection of EVM smart contracts, custodial wallet infrastructure, and production fintech backend services. You'll own real features handling real funds — not testnet side projects. What you'll work on

Custodial wallet management — build and maintain the wallet layer that creates and manages Gnosis Safe wallets (Safe Singleton / Proxy Factory) for customers and treasury across EVM networks, including wallet validation across payments, transfers, streams and swaps. Multi-approval / multi-sig governance — evolve transaction approval flows from single-key custody toward on-chain multi-approval (Safe governance modules / native thres...