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Abasi T

@ggvVaSO • 3h

Worked on one blockchain for years — now every job wants multi-chain skills. How are people handling this?

I’ve been working primarily on Solana for about 4 years. Until recently, that depth felt like a strength.Lately, almost every role I see expects experience across multiple chains — Ethereum,...

3

Replies
ChainPenLilly

@ChainPenLilly • 19h

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...

6

Replies
ChainMentorNaina

@ChainMentorNaina • 19h

Worked on one blockchain for years — now every job wants multi-chain skills. How are people handling this?

I’ve been working primarily on Solana for about 4 years. Until recently, that depth felt like a strength.Lately, almost every role I see expects experience across multiple chains — Ethereum,...

7

Replies
Application deadline: 4 weeks

S

Senior Protocol Engineer

Squads • FULL_TIME • NA

Job description

Squads is a fintech company building infrastructure and APIs for the stablecoin economy, with products spanning multisig wallets, business accounts, and personal finance applications. The Senior Protocol Engineer will work on Grid, Squads’ stablecoin infrastructure and developer platform, focusing on the Solana programs that power smart account functionality. This role...

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Application deadline: 4 weeks

P

Security Engineer

Parity • FULL_TIME • NA

Job description

Parity builds and maintains core open-source blockchain infrastructure, including Polkadot, the Polkadot SDK, and Kusama. The Security Engineer will join the Security Engineering team and focus on strengthening the security posture of Parity’s blockchain ecosystem. This role involves auditing and, where required, writing secure Rust code, performing in-depth manual and...

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Application deadline: 4 weeks

P

Smart Contract Engineer

Polymarket • FULL_TIME • NA

Job description

Polymarket operates a large-scale prediction market protocol where users trade on real-world outcomes using on-chain infrastructure. The Smart Contract Engineer will join the core protocol team and own the design, development, and deployment of Solidity smart contracts that secure and operate high-volume peer-to-peer markets. This role focuses on building and...

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Application deadline: 4 weeks

C

Rust Engineer

Cryptio • FULL_TIME • NA

Job description

Cryptio builds enterprise-grade back-office and data infrastructure used for accounting, reporting, and operational workflows in the digital asset ecosystem. The Rust Engineer will join the Accounting squad, focusing on the systems that power cost basis calculations, PnL, staking, derivatives, accruals, and large-scale reporting pipelines. This role owns the design and...

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Shubhada Pande

@ShubhadaJP • 1d

The Smart Contract Portfolio That Shows How You Think

A Framework for Reasoning, Safety, and System Design**Most smart contract portfolios fail for a simple reason: they look like a collection of projects instead of a window into how a...

0

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AlexDeveloper

@Alexdeveloper • 2d

I’m in my 30s with a commerce degree… is it too late to start a blockchain career?

I’m in my early 30s with a commerce background and feeling stuck in my current path. I’ve been reading about blockchain jobs for the last few months, and it genuinely...

10

Replies
MakerInProgress

@MakerInProgress • 2d

I’m preparing for a system design interview. How do you explain blockchain consensus trade-offs without going too deep?

I’ve got a system design interview coming up for a blockchain role, and I’m struggling with how to talk about consensus algorithms without either oversimplifying or going way too deep.In...

3

Replies
Shubhada Pande

@ShubhadaJP • 2d

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...

1

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MakerInProgress

@MakerInProgress • 3d

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...

6

Replies
CryptoSagePriya

@CryptoSagePriya • 3d

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...

4

Replies
Jatin R

@5EB8S0F • 3d

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...

1

Replies
Difficulty - Medium

Total Plays - 4

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

#B

#C

#D

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.

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