A Web3 wallet is an app or device that holds the keys to a user's blockchain accounts and signs transactions. It lets people hold assets and connect to decentralised applications under their own control.
A blockchain developer builds applications, smart contracts or core infrastructure on blockchain networks. The work ranges from protocol code to the services that connect users to chains, and hiring one makes sense when part of your product must run on a shared ledger.
A custodial wallet leaves the private keys with a third party such as an exchange, while a non-custodial wallet puts them in the user's hands. That choice decides who can move funds, who carries the risk and who must meet regulatory duties.
An MPC wallet is a crypto wallet whose private key is never held in one place. Several parties each keep a key share and sign together, so no single device, person or server can move funds alone.
A smart wallet is a crypto wallet that is itself a smart contract. Because its rules are code, it can offer recovery without a seed phrase, spending limits, batched actions and sponsored gas.
Web3 is a model of the internet where users hold their own digital assets and identity through blockchain-based applications. Instead of logging into central platforms, people connect wallets to apps built on smart contracts and tokens.
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