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Innovation Researcher – Web3, Rust, and Corporate Development

Keyrock • FULL_TIME • NA

Job description

About the CompanySince 2017, Keyrock has been reshaping the digital asset economy through its advanced trading infrastructure and research-driven innovation. Today, the company operates across 80+ exchanges and supports both institutional and DeFi ecosystems with liquidity and algorithmic trading solutions.With a global, remote-first team of over 180 professionals spanning 40+...

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Application deadline: 1 day

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Senior Rust Engineer (Remote)

Zircuit • FULL_TIME • NA

Job description

We’re looking for a Senior Rust Engineer who’s ready to play a pivotal role in shaping next-generation blockchain infrastructure. In this position, you’ll be directly involved in designing, building, and scaling core systems that power decentralized technologies. This is a hands-on engineering role with strong emphasis on ownership, technical depth,...

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Application deadline: 1 day

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Senior Full Stack Engineer (Remote)

Zircuit • FULL_TIME • NA

Job description

Zircuit is hiring a Senior Full Stack Engineer to develop and maintain decentralized applications (DApps) that bridge AI and blockchain. You will work across the full technology stack, ensuring security, scalability, and performance in production-grade systems.ResponsibilitiesDesign, build, and optimize DApps using modern web and blockchain frameworks.Develop and maintain APIs, databases,...

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Arif

@ofh3VYy • 4w

Looking for a quick resume roast for blockchain dev roles

Goal: Junior Smart Contract Engineer / Blockchain DeveloperSpecific Question: From your experience, what's the #1 thing missing from my resume for a role like this?All feedback welcome!

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Andria Shines

@ChainSage • 4w

Struggling with Hardhat debugging — am I missing something beyond console.log? 🤔

I’ve started building my first few smart contracts and use Hardhat for testing. But every time something fails, I just keep adding console.log everywhere until it magically works. It feels...

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Abdil Hamid

@ForensicBlockSmith • 4w

Hardhat tool in blockchain is used for?

Hey everyone, I'm new to blockchain development and just started learning about Ethereum. I've heard a lot about Hardhat, but I'm not entirely sure what it does. Let's say I'm...

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ChainMentorNaina

@ChainMentorNaina • 4w

CEI rule in interviews — when do you actually break it without breaking the contract?

Everyone tells juniors: “Follow Checks-Effects-Interactions.” ✅But the moment a Solidity interview goes deeper — we freeze. 😅Real world smart contract security isn’t just memorizing rules. Sometimes you do call external...

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Abdil Hamid

@ForensicBlockSmith • 4w

Live PR review nerves — do seniors secretly judge beginners too harshly?

I’ll be honest — interviews don’t scare me anymore.But that first live Pull Request review at a real job? Terrifying.I’ve heard stories that seniors can be blunt, especially in blockchain...

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Shubhada Pande

@ShubhadaJP • 4w

How to Pass Smart Contract Developer Interviews in 2025: Hiring Signals Founders Trust in the First 20 Minutes

Skills are not your biggest challengeEvery week, Smart Contract developers apply to Web3 startups with clean GitHub profiles, personal DApps, solidity practice, and strong motivation. Yet the rejections come before...

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Difficulty - Medium

Total Plays - 15

Allowed Time - 10 sec

Best time - 2.464 sec

Why might a contract work on testnet but fail on mainnet?

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

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Explanation:
Mainnets often have stricter gas limits and higher costs than testnets. A function that runs fine on testnet may exceed block gas limits in production. Developers should simulate deployments and optimize loops before mainnet release

Leaderboard
Difficulty - Medium

Total Plays - 18

Allowed Time - 10 sec

Best time - 2.132 sec

When does a fallback trigger?

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

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Explanation:
The fallback() function runs when a transaction calls a non-existent function or sends data without matching any signature. It’s essential for proxy contracts but must be written carefully to avoid gas griefing and reentrancy risks.

Leaderboard
Difficulty - Medium

Total Plays - 10

Allowed Time - 10 sec

Best time - 1.483 sec

What does delegatecall do?

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

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Explanation:
delegatecall lets one contract run another’s code while keeping its own storage and balance. It’s powerful but risky — if the target contract has malicious logic, it can overwrite your state variables or drain funds. Auditors always flag unsafe delegatecalls

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Abdil Hamid

@ForensicBlockSmith • 1mo

Building a Blockchain/Web3 Portfolio Site: Sections, Case Studies, and Metrics

As someone who’s worked in forensic investigations, fraud detection, and smart contract security, I want to build a public-facing Web3 portfolio site to present my projects in a structured way.Beyond...

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Tushar Dubey

@DataChainTushar • 1mo

Hardhat or Foundry first? What actually helps in your first Smart Contract job?

Everyone online keeps debating whether Hardhat or Foundry is “better,” but I’m trying to understand this as this is my first job. When you join a team, are they expecting...

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Web3Learner_Abaz

@Web3LearnerAbaz • 1mo

Looking for Blockchain Internship: What Skills Do I Need to Start in Web3?

Hi everyone, I’m 18 and want to start my career in the blockchain industry. I’m planning to do an internship, but honestly, I’m confused about what skills to learn first.Some...

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