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Shubhada Pande

@ShubhadaJP • 1mo

Smart Contract Fundamentals in Blockchain: EVM Basics, Solidity Concepts, Tooling & Core Mental Models

Strong smart contract engineers are not defined by how fast they jump into DeFi or audits — they are defined by how well they understand first principles.This hub exists to...

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Alex Chen

@AlexC • 3mos

How do QA testers contribute during smart contract audits?

Auditors usually get all the credit for catching vulnerabilities, but most blockchain QA testers I know do half the groundwork. They write reproducible tests, simulate attack flows, and catch logic...

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Tushar Dubey

@DataChainTushar • 3mos

How Do You Balance Automation and Manual Testing in Blockchain Projects?

Our QA team often argues about what to automate in blockchain testing. Unit tests are stable, but once we touch integration or cross-chain flows, we get random RPC errors and...

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Shubhada Pande

@ShubhadaJP • 2mos

Smart Contract Developer Hiring: Practical Signals Teams Should Check Before Extending an Offer

Most Web3 founders know the pain of mis-hiring a smart contract developer. The symptoms repeat every time:Feature velocity slows.QA and security stretch thin.Seniors take on invisible clean-up work.Teams shift from...

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ChainPenLilly

@ChainPenLilly • 2mos

As a Wallet Infra Ops Lead, how do you enforce reliability culture without slowing dev velocity?

Ops Lead here at a wallet infrastructure startup. We’ve scaled from 3 to 25 devs in 6 months and the chaos is real , hotfixes on prod, untested PRs, infra...

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Shubhada Pande

@ShubhadaJP • 1mo

Web3 Hiring Signals

Your curated hub for understanding how Web3 teams actually evaluate talent — beyond resumes, GitHub stars, and surface-level interviews.This page organizes AOB discussions and articles that help founders, hiring managers,...

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Application deadline: 2 weeks

S

React Native Developer

SatoshiLabs (Trezor) • FULL_TIME • NA

Job description

SatoshiLabs is the company behind Trezor, a hardware wallet product focused on secure self-custody of digital assets. The team works on open-source software and hardware and maintains industry standards related to wallet recovery and security. This role is part of a remote-first, cross-platform product team responsible for the Trezor Suite...

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SmartChainSmith

@SmartChainSmith • 3mos

Post-Airdrop DAO Growth — How Do You Retain Users Without Incentives?

Our DAO recently completed a major airdrop, and while we saw a huge spike in wallet activity, participation has since crashed by 78% in 30 days. I’m the growth lead...

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MakerInProgress

@MakerInProgress • 3mos

How Should a DAO Growth Manager Define Real Retention After an Airdrop When Wallet Activity Drops Fast?

Our DAO recently ran a big airdrop, and wallet activity fell sharply after about two weeks. As the Growth Manager, I need to define “retention” in a way that reflects...

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Difficulty - Medium

Total Plays - 19

Allowed Time - 10 sec

Best time - 2.132 sec

When does a fallback trigger?

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

#A

#B

#C

#D

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
Application deadline: 5 days

D

Smart Contract Engineer

DoubleZero • FULL_TIME • NA

Job description

DoubleZero is building a high-performance, permissionless global network designed to increase bandwidth and reduce latency for distributed systems. The Smart Contract Engineer will work on designing and implementing smart contracts and supporting software that form the core of the DoubleZero protocol. This role focuses on developing secure, production-ready contracts primarily...

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Application deadline: 6 days

C

Smart Contract Engineer

Category Labs (formerly Monad Labs) • FULL_TIME • NA

Job description

Category Labs is a systems engineering and research team building high-performance decentralized infrastructure. The company focuses on application-layer primitives enabled by a custom, high-throughput EVM client. As a Smart Contract Engineer, you will work within the core engineering group to design and implement smart contracts aligned with the performance characteristics...

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Arif

@ofh3VYy • 2mos

Need Career Advice: Unpaid Blockchain Internship vs. MNC Offer

Hi everyone, I need some advice on a career crossroads.I have two offers:Blockchain Startup :6-month unpaid internship (accommodation provided).Followed by a 2-year bond.PPO: Max 30k/month.Capgemini (MNC):4.25 LPA for Software Engineer...

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Angela R

@Web3SkillMapper • 2mos

As a Web2 PM Switching to Web3, How Do You Prove You Understand Token Economics Without a Finance Background?

I’ve been a product manager in fintech for five years and recently started interviewing with DeFi startups. Most founders ask detailed questions about tokenomics, incentive loops, or treasury design —...

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Bondan S

@Layer1Bondan • 2mos

Are DAO Growth Roles Losing Relevance After the Airdrop Wave?

Many DAOs saw explosive growth in 2023–24 around token incentives and airdrops. But now that most “growth” metrics were inflated by short-term farmers, hiring teams are rethinking what DAO growth...

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