Senior Application Security Engineer

About the Company

Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all — bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure.

As a publicly traded company, Gemini is poised to accelerate this vision with greater scale, reach, and impact.

As a member of the Application Security (App Sec) team, you will share in the responsibility of protecting the company and our customers against application security threats. The App Secteam is focused on the advancement of modern application security practices and supports the engineering organization by finding, fixing, and preventing software security vulnerabilities.

As a Senior Application Security Engineer on the Application Security team, you will work closely with engineering and product teams to provide security recommendations and identify security issues throughout the software development lifecycle. This includes secure design reviews, threat modeling, secure code review, and penetration testing among other activities. In addition to providing hands‑on security guidance and reviews, you will design, build, and maintain application security tooling and integrations that scale security across the organization.

This role is required to be in person twice a week at either our San Francisco, CA or New York City, NY office.

• Support the Gemini Secure Software Development Lifecycle as an application security subject matter expert through design review, threat modeling, code review, and penetration testing
• Collaborate and advise engineering teams on application security best practices and vulnerability remediation
• Perform deep‑drive security reviews to ensure all Gemini products and services follow secure design principles across our product portfolio (web, mobile, and APIs)
• Research, build and drive adoption of high‑signal application security automation and secure‑by‑default frameworks
• Create and deliver hands‑on software security training to engineering teams to enable engineers at scale
• Participate in the Application Security on‑call rotation to support engineering teams during incidents

• 5+ years of experience in application security or similar roles
• Ability to perform design reviews, threat modeling, secure code reviews, or penetration testing with an attacker mindset
• Strong background in application security best practices and familiarity with common vulnerabilities (e.g. SSRF, race conditions, privilege escalations, etc.)
• Some background in development or scripting experience (Python, Scala, C++, or JavaScript)
• Familiarity with and ability to understand business objectives, business context, and security risk
• Strong communication skills and the ability to collaborate on a cross‑functional team

• Experience with microservice architectures
• Experience with cloud‑native environments
• Experience with preventing application security vulnerabilities through secure design patterns, automated tooling, or frameworks
• Experience with supply chain security

The compensation & benefits package for this role includes:

• Competitive starting salary
• A discretionary annual bonus
• Long‑term incentive in the form of a new hire equity grant
• Comprehensive health plans
• 401(k) with company matching
• Paid Parental Leave
• Flexible time off

The base salary range for this role is between $140,000 - $200,000 in the State of New York, the State of California and the State of Washington. This range is not inclusive of our discretionary bonus or equity package. When determining a candidate’s compensation, we consider a number of…