Full Stack Engineer
•
Engineering
New York City
Full Time
No required level
$125K – $250K • Offers Equity
About Spearbit & Cantina:
Founded in 2021 by former Ethereum Foundation Solidity engineers, Spearbit tackles Web3 security challenges. Our founding team built the leading blockchain language and secured the largest smart contract, protecting over $160B in value.
We're building Cantina, the "GitHub for Security", connecting security researchers with projects needing expertise. Our Cantina security platform has powered major competitions and serves the leading projects in Web 3. It currently supports collaborative security reviews, public and private security competitions, bug bounty programs, incident response, and AI code analyzer.
Similar to how cloud-security startups emerged previously, Cantina aims to be the definitive code-security platform for the future.
The Opportunity: We’re looking for a Full Stack Engineer to help us design, build, and scale our core products. This is an opportunity to have a real impact on our technical direction and product roadmap while working alongside a team of builders who thrive on curiosity and collaboration.
We have multiple positions available and are open to a variety of experience levels, including recent graduates. What matters most is a strong foundation in software development, a willingness to learn quickly, and excitement about Web3.
What you'll do:
Contribute to the developing, building and maintaining our web applications and backend services.
Collaborate with designers, product managers and other engineers to create seamless user experiences.
Write clean, maintainable and well-tested code across the stack.
Participate in code reviews, architecture discussions and knowledge sharing.
Stay up to date with emerging trends in web development and in our industry.
What we’re looking for:
Strong programming fundamentals (in JavaScript/TypeScript, Python, Rust, or Go).
Familiarity with frontend frameworks (React, Next.js, or similar).
Experience with backend development (Node.js, Express, or similar).
Understanding of databases (SQL and/or NoSQL).
Curiosity about blockchain, smart contracts and decentralized systems.
A self-starter mindset, able to thrive in a fast-paced, ambiguous startup environment.
Strong communication skills and collaborative spirit - this is critical as we are a global company!
Prior startup, internship or project based experience is a plus.
Benefits
Competitive salary and performance-based compensation opportunities
Opportunity to work in an early-stage startup with a talented and passionate team.
Exposure to high-profile clients in the blockchain and cryptocurrency industry
Comprehensive health, dental and vision benefits.
401k matching program
Join Spearbit and help us build the future of code security!
Company
Cantina is a web3 security marketplace created to connect blockchain projects with top-tier independent security researchers. It was launched to make blockchain security services like smart contract audits, bug bounties, and penetration testing more accessible and transparent. By offering a platform where teams can find and collaborate with vetted experts, Cantina helps improve the security posture of decentralized applications and protocols.
The platform offers two main ways to engage with researchers. In Cantina Managed, the Cantina team matches clients with a high-quality auditing group based on the project’s needs. In Cantina Guilds, clients can browse and choose specific teams or individuals they want to work with. Cantina also features crowdsourced competitions, where large groups of researchers hunt for bugs within a limited time window, creating fast and cost-effective security reviews.
Cantina provides a streamlined experience for both clients and researchers. For clients, it means faster access to audits, flexible pricing, and simplified project coordination. For researchers, Cantina offers legal protection, stable payments, and the chance to build a public reputation in the ecosystem. By lowering barriers and raising standards, Cantina is helping shape a more secure future for the web3 space.