• 23 days left
    A

    Product Lead, Solana

    AlchemyFull TimeNA

    New York, NY, United States / San Francisco, CA, United States Posted: Dec 26, 2025
    Job description
    Alchemy builds developer infrastructure used to operate blockchain applications at scale. The Product Lead, Solana role owns the direction and execution of Alchemy’s Solana product offering, which supports high-throughput, low-latency blockchain workloads and handles billions of API requests daily. This position is responsible for defining the product roadmap, managing a...
  • 23 days left
    New York, NY, United States / San Francisco, CA, United States Posted: Dec 26, 2025
    Job description
    Alchemy builds developer infrastructure used to create, scale, and operate blockchain-based applications and onchain products. The Senior Engineering Manager, Infrastructure & Platform role focuses on leading multiple backend-focused teams responsible for core cloud infrastructure, platform services, data engineering, and internal tooling. This position owns technical execution and long-term platform strategy...
  • 17 days left
    A

    Solutions Engineer

    AlchemyFull TimeNA

    New York, NY, United States / San Francisco, CA, United States Posted: Dec 23, 2025
    Job description
    Alchemy provides developer infrastructure, APIs, and tooling used to build and scale onchain applications and rollups. The Solutions Engineer role works closely with strategic customers to design, optimize, and extend their use of Alchemy’s infrastructure. This position combines systems design, hands-on coding, and customer-facing collaboration. You will advise teams on...
  • 23 days left
    A

    Smart Contract Engineer

    AlchemyFull TimeNA

    New York, NY, United States / San Francisco, CA, United States Posted: Dec 23, 2025
    Job description
    Alchemy builds developer infrastructure and tooling that supports onchain applications and distributed protocols. This role focuses on designing and maintaining smart contract–based protocols that extend Alchemy’s developer platform. As a Smart Contract Engineer, you will architect distributed protocols with a focus on security, scalability, and performance, and maintain them in...
  • 23 days left
    O

    Blockchain Security Researcher

    OpenZeppelinFull TimeNA

    Remote · Worldwide Posted: Dec 23, 2025
    Job description
    OpenZeppelin is a blockchain security company focused on protecting decentralized applications and smart contracts. The team develops open-source contract libraries and provides security services that support the full lifecycle of blockchain projects. As a Blockchain Security Researcher, you will analyze smart contracts for decentralized applications prior to launch, identify vulnerabilities,...
  • 14 days left
    R

    Blockchain Engineer

    Republic AIFull TimeNA

    Remote · Worldwide Posted: Jan 27, 2026
    Job description
    <?xml encoding="UTF-8"> This role focuses on building and securing peer-to-peer networking layers for a blockchain-based system. The Blockchain Engineer will design resilient P2P components using gossip protocols, distributed hash tables, and NAT traversal techniques. The position owns network performance, reliability, and security, with responsibilities spanning monitoring, debugging, and latency optimization....
  • 23 days left
    R

    Engineering Manager

    Risk LabsFull TimeNA

    Remote · Worldwide Posted: Feb 1, 2026
    Job description
    <?xml encoding="UTF-8"> Risk Labs is the core team behind the UMA and Across ecosystems, building infrastructure that enables verifiable real-world data and cross-chain interoperability for Web3. This remote web3 role combines engineering leadership with hands-on architecture and development responsibilities. The Engineering Manager will guide a small cross-stack team while remaining...
  • 23 days left
    C

    Blockchain Engineer (EVM Client)

    ConduitFull TimeNA

    Remote · Worldwide Posted: Feb 1, 2026
    Job description
    <?xml encoding="UTF-8"> Conduit builds a rollup-native cloud platform designed to scale Ethereum by making onchain compute easier to launch and operate. This layer 2 scaling role focuses on the backend systems that power Conduit’s platform, where engineers work directly on EVM node architecture, performance, and reliability. The Blockchain Engineer will...
  • 23 days left
    P

    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...
  • Difficulty - Medium
    Total Plays - 24
    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 - 15
    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 - 14
    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.
  • 23 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...
  • 23 days left
    L

    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...