New York City, United States of America On-site USD 200,000 / year

Category Labs is hiring a Smart Contract Engineer

Join a core engineering team building next-generation blockchain applications on the Monad client. As a Smart Contract Engineer, you'll design and implement robust, efficient smart contracts that leverage the full capabilities of a high-throughput environment. Your work will directly shape the application layer, enabling new primitives and empowering external development teams.

What You'll Do

  • Develop and audit smart contracts optimized for performance and security within the constraints and opportunities of the Monad client
  • Collaborate with both internal engineers and external partners to identify ecosystem gaps and deliver practical solutions
  • Diagnose and resolve complex technical challenges across application and infrastructure layers
  • Contribute to system design discussions, advocating for clean abstractions, long-term maintainability, and scalable architecture
  • Write clear technical documentation and participate in code reviews to uphold rigorous engineering standards

What We're Looking For

  • 4+ years of software engineering experience, with at least 3 years focused on Solidity smart contract development
  • Proven background in blockchain infrastructure—experience with Layer-1, Layer-2, or related systems such as oracles, bridges, indexers, or RPC providers
  • Hands-on proficiency with Foundry, Hardhat, and testing frameworks for smart contracts
  • Strong grasp of application-layer security, including common vulnerabilities and mitigation strategies
  • Backend experience in low-level languages like C, C++, or Rust
  • A track record of shipping meaningful projects from concept to production, ideally with real-world users
  • Excellent communication skills and a collaborative mindset, with a focus on clarity and technical precision
  • A practical, action-oriented approach to problem-solving, grounded in real-world constraints
  • Demonstrated excellence in past work, with attention to detail and system design
  • Commitment to disciplined development practices and high-quality outputs

Environment & Expectations

This is an onsite role based in New York City, where in-person collaboration fuels rapid iteration and alignment. The team values low ego, shared ownership, and a lean structure focused on ambitious technical goals. You’ll work alongside early team members shaping the culture and direction of the project.

Compensation & Benefits

  • Minimum full-time salary of $200,000, with final offer adjusted for experience, expertise, and location
  • Equity package included
  • Comprehensive benefits: medical, dental, and vision coverage
  • Unlimited paid time off
  • 401(k) plan with company match
  • Lunch and dinner stipend for in-office days
  • Monthly wellness benefit
  • Paid parental leave
  • For international hires via EOR: benefits aligned with local requirements and EOR offerings
Required Skills
SolidityC++Rust
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About company
Category Labs
Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. They strive to design and build step-function improvements over existing blockchain solutions.
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Job Details
Department Software Development
Category other
Posted 5 months ago