• Difficulty - Medium
    Total Plays - 0
    Allowed Time - 10 sec
    Best time - --

    Which audit signal indicates poor threat modeling?

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

    #A
    #B
    #C
    #D
    Explanation:
    A happy-path-only focus is a strong signal of poor threat modeling in blockchain security because it ignores attacker behavior, edge cases, and abuse scenarios. Strong smart contract audit readiness requires adversarial thinking, not just normal-flow testing.
  • Difficulty - Medium
    Total Plays - 0
    Allowed Time - 10 sec
    Best time - --

    Which audit issue is most often downgraded incorrectly?

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

    #A
    #B
    #C
    #D
    Explanation:
    Front-running is often downgraded incorrectly in smart contract audits because teams underestimate MEV and mempool-based exploitability. In DeFi security, transaction ordering attacks can cause repeated economic loss even without a classic code exploit.
  • Difficulty - Medium
    Total Plays - 1
    Allowed Time - 10 sec
    Best time - --

    Which finding has highest real-world exploit probability?

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

    #A
    #B
    #C
    #D
    Explanation:
    Access control bugs often have the highest real-world exploit probability in smart contracts because attackers can directly call privileged functions when role checks fail. In blockchain security audits, broken authorization logic is a common cause of fund loss and protocol takeover.
  • 24 days left
    P

    Fullstack Engineer

    ParadexFull TimeNA

    Remote · Worldwide Posted: Dec 29, 2025
    Job description
    Paradex is a decentralized finance platform building a unified system that combines exchange trading, asset management, and borrow/lend functionality on a high-performance blockchain. The team operates with a flat structure and focuses on shipping production-grade systems without traditional management layers. As a Fullstack Engineer, you will own the end-to-end development...
  • Job Expired
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    Data Engineer

    ParadexFull TimeNA

    Remote · Worldwide Posted: Dec 29, 2025
    Job description
    Paradex is a decentralized finance platform combining exchange trading, asset management, and borrow/lend functionality within a single unified account structure. The company operates a high-throughput blockchain-based system supporting a wide range of spot and derivatives markets. As a Data Engineer, you will be responsible for designing and maintaining the data...
  • 24 days left
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    Mid / Senior Smart Contract Engineer

    LI.FIFull TimeNA

    Remote · Remote EMEA, Remote APAC Posted: Jan 3, 2026
    Job description
    LI.FI builds infrastructure that enables unified access to on-chain liquidity across multiple blockchains through a single API, supporting same-chain and cross-chain swaps. This role sits within the Smart Contract API Expansion team, which focuses on integrating new chains, bridges, and protocol functionality across EVM networks. As a Mid/Senior Smart Contract...
  • 24 days left
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    Smart Contract Engineer

    Paxos LabsFull TimeNA

    Remote · NYC Posted: Jan 3, 2026
    Job description
    Paxos Labs builds enterprise-grade onchain infrastructure used by large financial organizations to support transparent and verifiable digital asset products. The Smart Contract Engineer role sits within the engineering organization and focuses on scaling the company’s DeFi protocol infrastructure. The position involves researching, designing, and implementing core protocol mechanisms across areas...
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    Smart Contract Engineer

    Category Labs (formerly Monad Labs)Full TimeNA

    Remote · New York Posted: Jan 3, 2026
    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...
  • Wasim Choudhary

    Wasim Choudhary

    @K9QfAg6 Feb 23, 2026

    ERC4337 enabling AA for Ethereum

    Just Created a Education Doucmention, actually let me rephrase, a Architectural dissection for ERC4337 enabling AA(Account Abstraction) for Ethereum, and No worries Native Zksync AA soon! Every Topic presents with...
  • 26 days left
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    Senior Security Engineer

    Lightning LabsFull TimeNA

    Remote · Worldwide 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...
  • 26 days left
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    Security Engineer

    ProvableFull TimeNA

    Remote · Worldwide 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,...
  • 26 days left
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    Research Engineer

    Chainlink LabsFull TimeNA

    Remote · United Kingdom 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...
  • 26 days left
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    Remote · Worldwide Posted: Jan 22, 2026
    Job description
    <?xml encoding="UTF-8"> Validation Cloud is a Web3 infrastructure company providing products across Node API, Staking, and Data x AI, supporting large-scale blockchain access and analytics. Its platform is used to deliver low-latency node connectivity, staking operations, and data-driven workflows for institutional and ecosystem partners. As a Backend Software Engineer, you...
  • 26 days left
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    OP LabsFull TimeNA

    San Francisco or New York (Relocation Available) Posted: Jan 11, 2026
    Job description
    OP Labs is hiring a Senior Product Manager to lead enterprise-facing products focused on fintech companies and centralized crypto exchanges within the Optimism ecosystem. This role owns the roadmap for products that enable enterprises to integrate onchain functionality—such as trading, yield, and payments—while maintaining compliance, custody, and user experience standards....