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Shubhada Pande

@ShubhadaJP • 10h

How to Explain Your Smart Contract Architecture Decisions Without Sounding Vague or Theoretical

There is one moment in almost every Solidity interview when everything becomes quiet. You finish describing your solution, and the interviewer asks:“Why did you design it this way?”This one question...

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ChainPenLilly

@ChainPenLilly • 11h

Got a Web3 job offer but the JD looks messy… is this a red flag or am I overthinking it?

I just got a Web3 job offer that I was genuinely excited about… until I re-read the job description properly.Some parts feel messy or incomplete — no clear responsibilities, vague...

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MakerInProgress

@MakerInProgress • 21h

Nethermind 15-Minute Technical Interview: What Ethereum Intern Candidates Should Actually Expect

I just got a 15-minute technical interview invite from Nethermind for a blockchain internship, and I’m excited—but honestly a bit scared. This is my first real Ethereum-focused interview, and because...

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CryptoSagePriya

@CryptoSagePriya • 21h

Thinking of switching into DePIN engineering—what skills actually matter once you’re on the job?

I’ve been exploring DePIN roles because projects like Helium, Filecoin Green, IoTeX, and Hivemapper are growing fast, but I still don’t fully understand what a DePIN engineer does day-to-day.My background...

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Jatin R

@5EB8S0F • 21h

Anyone here moved from regular QA to Blockchain QA? I’m trying to understand what actually changes

I’ve been working in regular QA for about six years — mostly white-box, API testing, and some automation. I’m now thinking about moving into Blockchain QA, but I can’t figure...

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Difficulty - Medium

Total Plays - 1

Allowed Time - 10 sec

Best time - 10 sec

Why should developers avoid using tx.origin for authentication?

Tip: Click "Play" to reveal options and start playing.

#A

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Explanation:
Attackers can trick users into calling a malicious contract. That contract then makes a call where tx.origin equals the victim’s address. This bypasses access control and leads to unauthorized actions.

Leaderboard
Difficulty - Medium

Total Plays - 1

Allowed Time - 10 sec

Best time - 10 sec

Why are fallback functions dangerous?

Tip: Click "Play" to reveal options and start playing.

#A

#B

#C

#D

Explanation:
Fallback functions run automatically when unknown calls or plain ETH are sent. If they contain external calls or heavy logic, attackers can trigger recursion or re-entrancy. They must be kept minimal and safe.

Leaderboard
Difficulty - Medium

Total Plays - 4

Allowed Time - 10 sec

Best time - 10 sec

Why can abi.encodePacked cause issues?

Tip: Click "Play" to reveal options and start playing.

#A

#B

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#D

Explanation:
encodePacked removes padding, which can produce identical byte sequences for different inputs. When combined with hashing, this may cause collisions. Using abi.encode is safer for multi-field data.

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Shubhada Pande

@ShubhadaJP • 1d

How to Interview Smart Contract Engineers Without Guessing Their Real Ability

Most Web3 founders rethink their hiring approach only after they’ve made a painful mis-hire. And in smart contract engineering, that mistake doesn’t just slow down delivery — it changes how...

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SmartChainSmith

@SmartChainSmith • 1d

Anybody dealt with a DAO where Discord is active but on-chain activity is flat?

I manage analytics for a mid-sized DAO (~12K members), and I’m running into a strange mismatch I can’t seem to solve internally. Our Discord is busier than ever — more...

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Application deadline: 4 weeks

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Senior Backend & Smart Contract Engineer (Rust/Solana)

Breeze (Anagram) • FULL_TIME • NA

Job description

Breeze is developing infrastructure that enables users to earn yield on digital assets through a non-custodial platform directly embedded into existing applications. This role centers on designing Rust-based Solana programs and maintaining backend components such as indexers, risk engines, and analytics systems. The engineer will work closely with product and...

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Application deadline: 4 weeks

Rust Backend Engineer

Svix • FULL_TIME • NA

Job description

Svix is hiring a Rust-focused Backend Engineer to help build and scale its server-to-server communication platform. The company develops high-performance message delivery infrastructure used by customers ranging from fast-growing startups to large enterprises. This role involves implementing backend services in Rust, designing systems that support high availability, and contributing to...

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Application deadline: 4 weeks

K

Software Engineer – Rust (Onchain)

Kraken • FULL_TIME • NA

Job description

Kraken is hiring a Rust-focused Software Engineer to support onchain engineering initiatives across its products. The role sits within a small backend engineering group responsible for designing, implementing, and maintaining Rust services that interact with multiple blockchain networks. This engineer will contribute to distributed system architecture, develop new features from...

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Application deadline: 4 weeks

Rust-Simplicity Maintainer

Blockstream • FULL_TIME • NA

Job description

Blockstream is seeking a Rust-Simplicity Maintainer to oversee its Rust-based implementation of the Simplicity language and related libraries. The role centers on maintaining multiple interconnected crates—such as rust-simplicity, SimplicityHL, hal-simplicity, rust-elements, and elements-miniscript—ensuring they function cohesively within the broader Simplicity ecosystem. This position involves architecture, implementation, testing, and long-term maintenance...

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DeFiArchitect

@DeFiArchitect • 1d

My explanation of zk-SNARKs vs zk-STARKs felt incomplete in an interview — what’s the clear, real-world way to compare them?

I recently had a blockchain developer interview where the panel asked me to compare zk-SNARKs and zk-STARKs “in practical engineering terms.” I understood the basic theory, but when they expected...

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