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.

• 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 cus...