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Sr Blockchain Developer Interview Questions

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8 sr blockchain developer interview questions shared by candidates

In this case you are tasked with designing and building a simple off-chain system and the on-chain smart-contract to enable cheap auctions. The goal is to enable trades between an ERC721 and a ERC20 with a single on-chain transaction. The auctions should work as follows: - Owner of the NFT approves all NFT’s to the Marketplace - Owner of the NFT signs to create an off-chain auction listing with a minimum price - Bidder approves ERC20 tokens to Marketplace - Bidder signs a bid for the auction - If owner approves the bid, signs it back and retrieve to bidder - Anyone with both signatures can settle the transaction, the owner takes the ERC20 whilst the bidder takes the NFT.
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Senior Blockchain Backend Developer

Interviewed at Rather Labs

4★
22 Aug 2022

In this case you are tasked with designing and building a simple off-chain system and the on-chain smart-contract to enable cheap auctions. The goal is to enable trades between an ERC721 and a ERC20 with a single on-chain transaction. The auctions should work as follows: - Owner of the NFT approves all NFT’s to the Marketplace - Owner of the NFT signs to create an off-chain auction listing with a minimum price - Bidder approves ERC20 tokens to Marketplace - Bidder signs a bid for the auction - If owner approves the bid, signs it back and retrieve to bidder - Anyone with both signatures can settle the transaction, the owner takes the ERC20 whilst the bidder takes the NFT.

In generale il colloquio tecnico si basava sul fatto di risolvere un task entro una settimana per poi commentarlo con due tecnici. Era composto in due fasi; la prima in cui esponevo quanto fatto e la seconda in cui mi venivano poste delle domande su quanto implementato.
avatar

Senior Full Stack/Blockchain & Solidity Developer

Interviewed at Consensys

3★
13 Jun 2022

In generale il colloquio tecnico si basava sul fatto di risolvere un task entro una settimana per poi commentarlo con due tecnici. Era composto in due fasi; la prima in cui esponevo quanto fatto e la seconda in cui mi venivano poste delle domande su quanto implementato.

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