In the 2000s, the world came online. Now, it’s coming onchain—and we’re making it happen, faster.
Crossmint is a one-stop-shop developer platform for companies building onchain. We completely remove the complexity of building and using blockchain applications. Our platform provides all of the infrastructure companies need to build apps that scale to millions, without needing to orchestrate multiple vendors. It lets them create experiences that mirror the traditional web with familiar features like FaceID and email sign-ups, while eliminating gas fees and other friction points.
Our suite includes wallets, payments, onboarding, on/off ramps, tokenization, AI agent infrastructure, and other essential onchain building blocks, across 40+ blockchains.
We’re building a world where companies can get their entire blockchain backend, through a few lines of code, to build the next generation of the internet. Join us!
Location
NYC or Miami
Type of Employment
Full-time
Salary range
Senior level: $180,000 – $190,000
Principal level: $210,000 – $220,000
Note: We determine candidate levels through insights gained during the interview process.
About the role
As a Senior/Principal Security Engineer, you will play a pivotal role in securing our blockchain-focused platforms and applications. You’ll collaborate with cross-functional teams throughout the organization, ensuring best-in-class security practices are applied. Your responsibilities will range from guiding security-sensitive projects to hands-on penetration testing, incident response, and continuous security education. Your mission at Crossmint: never let us end up in the Blockchain Graveyard.
Responsibilities
Serve as a security subject matter expert during product planning, architecture design, and other high-sensitivity initiatives.
Provide clear and actionable feedback to engineering and product teams.
Perform periodic code reviews to uncover security vulnerabilities in critical components.
Conduct penetration testing to evaluate real-world threats and ensure resilient defenses.
Identify and remediate system weaknesses before they become exploits.
Rapidly triage incidents, assess impact, define scope, and contain breaches.
Lead investigative efforts, produce comprehensive post-mortems, and recommend fixes at both code and process levels.
Educate the greater engineering team to elevate security awareness and practices.
About you
A strong candidate will have competency in several of these areas:
Experience: 4+ years in broad Security roles (Operational security, incident response, offensive security, GRC, product security, etc.).
Programming Skills: Proficiency in at least one high-level language to automate security tasks, build alerting capabilities, and empower developer teams to adopt security best practices.
Blockchain Knowledge: Proven experience or strong familiarity with blockchain technology, smart contracts, consensus mechanisms, or related security considerations.
Incident Response: Strong background in managing high-severity security incidents, producing clear post-mortems, and driving follow-up improvements.
Communication & Ownership: Exceptional ability to manage expectations, timelines, and deliverables across multiple stakeholders.
Security-First Mindset: A passion for enabling growth by embedding security at every layer of technology and culture.
Regulated Environment: Comfort working in or leading security initiatives within regulated environments (fintech, healthcare, etc.) is a plus.
Bonus Points
Software Development: Experience directly impacting product security through code contributions and reviews.
Cryptography Knowledge: Familiarity with key management, encryption algorithms, and related best practices.
Please keep in mind: This is the full list of everything we’re looking for. You don’t need to check every single box to be a strong candidate, and having a good number of these would already indicate a solid fit for the role.
Why Join Crossmint?
Work at a high-growth startup where your input directly influences the security and trustworthiness of our platform. If you’re ready to defend us from the world’s toughest security challenges, we want you at Crossmint.
Benefits
Highly competitive compensation, adjusted for location.
Stock options program.
Unlimited, flexible PTO.
Flexible work schedule with remote options.
Company laptop and home office equipment allowance.
Health, dental, vision, life, STD, and LTD insurances.
401(k) Plan.
Regular company off-sites and team-building events.
Our Principles
Results and delivery: Ship high quality work fast.
Build for the long term: Build scalable, secure, and reliable solutions. Use AI.
Extreme Ownership: Be an effective Directly Responsible Individual (DRI). Be proactive.
Be a team player: Be an effective and kind colleague providing credible challenge. Be present and reliable.
Talent research indicates that women are often less inclined than men to apply for a role unless they have experience in 100% of the listed skills. However, this list is only a guide. We welcome your application even if you feel you meet around 75% of the requirements. At Crossmint, we believe skills can be learned, and diversity makes us stronger.
We work to foster a respectful environment where each person can be their authentic self, free from harassment, racism, and any form of discrimination. We proudly uphold our commitment to diversity and inclusion as an equal opportunity employer, and this policy applies to all employment practices within our organization.
Please note that Crossmint never conducts AI-based interviews, and all of our processes include an initial video call with a team member. Crossmint will not request your personal identification documents or any payment at any point during your interview process. Please stay vigilant about potential fraud. If you receive an email that claims to be from Crossmint but ends with any domain other than @crossmint.com, @crossmint.io or @paella.dev, it is not from us. We own these three domains listed before, and they are the only legitimate ones.
Please let our Talent Team know if you need any assistance completing any forms, or participating in the process.
