Staff 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 Sec team 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 Staff Application Security Engineer on Gemini’s App Sec team, you will work closely with security, engineering, and product teams to set technical direction and provide security recommendations while identifying security issues throughout the software development lifecycle. This includes leading high-risk secure design reviews, threat modeling, and building paved roads among other activities.

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

• Own and evolve the Gemini Secure Software Development Lifecycle guardrails as an application security subject matter expert
• Lead architecture reviews, threat modeling, code reviews, and penetration testing for high-risk applications and services
• Research, build and drive adoption of high-signal application security automation and secure‑by‑default frameworks
• Create and deliver hands‑on application security training to enable engineers at scale
• Participate in the Application Security on‑call rotation and lead post‑incident hardening

• Proven ability to perform design reviews, threat modeling, secure code reviews, and 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.)
• Deep code review proficiency in Scala/JVM (preferred) or other languages and at least one of Python/Go/etc for building; able to review production services in other languages
• Experience implementing custom detection and prevention application security controls to eliminate application security issues beyond OWASP Top 10
• Familiarity with and ability to understand business objectives, business context, and security risk
• Strong cross‑functional communication and collaboration (Security, Engineering, and Product)
• Typically 7‑10+ years of experience or equivalent impact in application security, product security, or similar roles

• Experience implementing supply chain security controls (SCA, SLSA, signing, etc.)
• Prior experience in cryptocurrency firms or highly regulated environments (PCI DSS, SOX, SOC2, ISO 27001)
• Open‑source impact such as conference talks, blogs/papers, tooling, or libraries

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

The base salary range for this role is between $168,000 - $240,000 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 factors including skillset, experience, job scope, and current market data.

In the United States, we offer a hybrid work approach at our hub…