Staff Application Security Engineer

Gemini•Miami, NY

1d•Hybrid

About The Position

Gemini is a global crypto and Web3 platform offering a wide range of simple, reliable, and secure crypto products and services. The Application Security (AppSec) team's mission is to secure products at the time of thought and the time of build, ensuring security is never an afterthought. Gemini is AI-first, and AppSec builds the tools to make AI-first engineering secure. As a Staff Application Security Engineer on Gemini’s AppSec team, you will own the technical strategy to secure critical attack surfaces like on-chain, exchange, and credit card. You will operate with significant autonomy, partner directly with senior engineering leadership, and design and build AI agents that secure Gemini’s agentic SDLC at scale.

Requirements

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, Java, Go or other common languages, plus hands-on experience in at least Python, Go, or similar for building.
Comfortable reviewing production services written in other languages
Experience implementing custom detection and prevention application security controls to eliminate application security issues beyond OWASP Top 10
Familiarity with highly regulated environments (financial services, fintech, crypto, or equivalent) and ability to understand business objectives, business context, and security risk
Strong cross-functional communication and collaboration (Security, Engineering, and Product)

Nice To Haves

Experience building AI application security tooling using agents or skills
Experience with supply chain security, common frameworks (SLSA, OWASP SPVS) and other CI/CD security controls
Experience with preventing application security vulnerabilities at scale through secure design patterns, automated tooling, or frameworks
Experience with microservice architectures and cloud-native environments

Responsibilities

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
Design and build AI agents throughout the SDLC for automated threat modeling during design, AI-driven secure code generation and review, and reducing AppSec toil
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