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Abdil Hamid
@ForensicBlockSmith • Jan 10, 2026

Jan 10, 2026

1.5K

How Would You Actually Reduce NFT Minting Costs in Production — Not Just on Paper? (Interview Perspective)

I’m preparing for a blockchain interview and got asked a version of this question:“How would you reduce NFT minting costs on Ethereum in a real production setup?”I understand the basics...

Like 3 Replies 3
Ophirians Maharlika
@eCErd43 • Jan 10, 2026

Jan 10, 2026

115

💬 Let’s Talk About Security Auditing in Web3

Security has become one of the most talked-about topics in Web3 — and for good reason.Every week, we see new exploits, drained contracts, or projects shutting down because something small...

Like 1 Replies 2
AnitaSmartContractSensei
@SmartContractSensei • Jan 9, 2026

Jan 9, 2026

3.1K

Rust dev moving into Web3 — how do you answer ‘Tell me about yourself’ without sounding like a blockchain newbie?

I’m a Rust dev (backend + performance stuff) and I’m interviewing for Web3 roles now. This sounds silly, but “Tell me about yourself” is the one question where I freeze,...

Like 10 Replies 5
Amanda Smith
@AmandaS • Jan 9, 2026

Jan 9, 2026

1.0K

4 years as a Salesforce dev — should I jump to Solidity now, or keep Salesforce as my safety net?

I’ve been a Salesforce developer for almost 4 years (certified, regular projects, decent stability till recently). But the market feels shaky now and I’m honestly not super confident it’ll stay...

Like 7 Replies 2
Aditi R
@aGoKU4J • Jan 9, 2026

Jan 9, 2026

400

From AAA Game Economy Design to GameFi: What Skills Actually Transfer (and What Don’t)?

I’ve been working in the traditional gaming industry for several years, mostly around player engagement, progression systems, and game loops. Recently, I’ve been trying to understand whether moving into GameFi...

Like 1 Replies 4
Miben Rogers
@YGHQ65t • Jan 8, 2026

Jan 8, 2026

136

Mid-career blockchain developer here — salary ranges feel unpredictable, what should I pay attention to?

I’ve been working as a blockchain developer for a few years now and have started interviewing again, but I’m struggling to make sense of compensation this time around.For similar roles,...

Like 4 Replies 5
Job Expired

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Research Engineer

Chainlink Labs • Full Time • NA

Remote Posted: Jan 8, 2026

Job description

Chainlink Labs develops decentralized oracle infrastructure used across decentralized finance and institutional blockchain applications. The organization focuses on data delivery, interoperability, compliance, and privacy standards that support production-grade smart contract systems.The Research Engineer role sits within the research organization and works closely with core engineering, research scientists, and technical advisors....

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S

Software Engineer – Infrastructure & SRE

Syndicate • Full Time • NA

Remote Posted: Jan 8, 2026

Job description

Syndicate builds infrastructure that helps development teams abstract the operational complexity of web3 and focus on delivering end-user products. Founded in 2021, the company operates as a remote-first organization and develops tooling that supports scalable blockchain-based applications.The Software Engineer – Infrastructure & SRE role is part of the engineering team...

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Job Expired

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Security Engineer

Provable • Full Time • NA

Remote Posted: Jan 8, 2026

Job description

Provable is seeking a Security Engineer to oversee and secure its technology infrastructure, with a strong focus on cryptocurrency private key management, cloud security, and systems reliability. The role is part of the engineering function and supports a remote-first operating model.This position is responsible for protecting sensitive cryptographic assets, strengthening...

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Job Expired

W

Security Engineer

WorkOS • Full Time • NA

Remote Posted: Jan 8, 2026

Job description

WorkOS builds developer-focused infrastructure that helps SaaS companies implement authentication, identity, authorization, and enterprise-readiness features. The company operates as a fully distributed team across North American time zones and serves a large base of growing software companies.The Security Engineer role sits within the security team and is responsible for defining,...

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Abdil Hamid
@ForensicBlockSmith • Jan 7, 2026

Jan 7, 2026

1.4K

Teaching Solidity to beginners: which project-based blockchain books/ebooks are actually worth it (and not outdated in 2025?)

Hey everyone — I’m designing a beginner-friendly Solidity + smart contract track for students, and I’m trying to avoid the usual trap: they read a “blockchain book” for weeks, feel...

Like 14 Replies 5
SolidityStarter
@SolidityJatin • Jan 7, 2026

Jan 7, 2026

458

Fintech BA (4 yrs, India) — strong in SQL + Power BI, not a dev: which remote Web3 roles are actually realistic, and what proof projects get interviews?

I’m a business analyst in fintech (4 years) based in India. I live in SQL + Power BI, reporting, KPI definitions, stakeholder calls, etc. I’m trying to move into Web3...

Like 5 Replies 4
Shubhada Pande
@ShubhadaJP • Feb 4, 2026

Feb 4, 2026

220

Solidity Debugging & Tooling Hub (Tracing, Reverts, Incidents, Postmortem Proof)

Like 1 Replies 1
Shubhada Pande
@ShubhadaJP • Jan 6, 2026

Jan 6, 2026

263

How to Debug Solidity Smart Contracts: Hardhat, Testnets, Flaky Tests & Production Failures

Debugging Solidity smart contracts is one of the hardest skills to master in Web3 — and one of the most frequently tested in real interviews and on-the-job scenarios.Most smart contract...

Like 3 Replies 1
Job Expired

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Security Engineer – Attack Surface Management (ASR)

Exegy • Full Time • NA

St. Louis, MO (Hybrid) Posted: Jan 6, 2026

Job description

Exegy is hiring a Security Engineer focused on Attack Surface Management to own and mature its vulnerability management program. This role is responsible for reducing real organizational risk by identifying, prioritizing, and driving remediation of exploitable vulnerabilities across endpoints, servers, cloud workloads, SaaS platforms, and internet-facing systems. The position emphasizes...

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Job Expired

L

Senior Security Engineer

Lightning Labs • Full Time • NA

Remote Posted: Jan 6, 2026

Job description

Lightning Labs is hiring a Senior Security Engineer to support the security posture of its growing, globally distributed engineering organization. This is a hands-on role focused on defining and implementing systems security practices across production and open-source environments that interact with Bitcoin and the Lightning Network. The role involves securing...

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Shubhada Pande
@ShubhadaJP • Jan 4, 2026

Jan 4, 2026

1.1K

Blockchain Skills That Actually Matter in 2025 (Beyond Job Titles & Courses)

Most blockchain career guides list skills. Very few explain which ones actually matter once hiring starts.Over the last few years, the blockchain job market has matured fast. Teams are no...

Like 4 Replies 2
Shubhada Pande
@ShubhadaJP • Jan 4, 2026

Jan 4, 2026

386

Inside 2025’s Blockchain Hiring Surge: What Actually Changed in Web3 Hiring (and Why Most People Missed It)

A data-backed analysis of how Web3 hiring quietly transformed — and why clarity now matters more than speed.The Year the Market Quietly ChangedIn 2025, something unexpected happened in the blockchain...

Like 1 Replies 1
Emma T
@5INFFa4 • Jan 3, 2026

Jan 3, 2026

498

How to Answer “Why Blockchain?” When Transitioning from Cybersecurity to Blockchain Security Roles

I’m preparing for interviews for blockchain security engineer roles after four years in cybersecurity. The question that keeps tripping me up is: “Why do you want to work in blockchain?”...

Like 6 Replies 5
Difficulty - Medium

Total Plays - 24

Allowed Time - 10 sec

Best time - 0.900

Which opcode is deprecated but still callable?

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

#A

#B

#C

#D

Explanation:
CALLCODE is deprecated due to unsafe context handling. It remains callable for backward compatibility but should never be used in new designs.

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