Director, Senior Security Architect

Coin Desk is the most trusted media, events, indices and data company for the global crypto economy. Since 2013, Coin Desk Media has led the story of the future of money and investing, illuminating the transformation in society and culture that comes with it. Our award-winning team of journalists delivers news and unparalleled insights that bring transparency, comprehension and context. Coin Desk Events gathers the global crypto, blockchain and Web3 communities at annual events such as Consensus, the world's largest and longest-running crypto festival.

Coin Desk Indices offers expertise in digital asset indices, data and research to educate and empower investors. For more information on Coin Desk media and events, please visit  [] and for breaking headlines, data and indices visit  [] In November 2023, Coin Desk was acquired by the Bullish group, owner of Bullish, a regulated, digital assets exchange. For more information on Bullish, please visit  .

Coin Desk operates as an independent subsidiary with an editorial committee to protect journalistic independence.

Reports to:

CISO Americas

At Bullish, security is not a checkpoint, it is the foundation of trust that lets people move billions across our markets with confidence. The Bullish Security Architecture team secures Bullish Global, including the Bullish Exchange, Bullish Liquidity Services, Coin Desk Indices, Coin Desk Data, Coin Desk Media, and Coin Desk Events, designing the defenses that keep our mission-critical trading systems and other business lines resilient against the most capable adversaries in the world.

As a senior member on this team, you will sit at the intersection of cutting-edge engineering and high-stakes finance, shaping how secure software is built across web, API, mobile, and FIX platforms, and pushing our security bar beyond industry-leading. This is a senior technical leadership role, a hands-on application and cloud security architect who leads through influence, deep expertise, and mentorship.

If you thrive on solving complex technical challenges in a fast-moving crypto landscape and building first-of-its-kind systems, this is where you will do the most impactful work of your career.

• Build complex threat models for critical systems and establish industry-leading cybersecurity requirements to turn ambiguity into clear, prioritized defenses.
• Partner closely with Product, Engineering, and Infrastructure teams to design and ship secure software across web, API, mobile, FIX, and trading platforms.
• Lead complex global security initiatives, build custom AI-powered tooling to maximize efficiency and scale the cybersecurity program.
• Assess vulnerability risks, deliver actionable recommendations across all technical levels, and track health metrics and KPIs for executive reporting.
• Drive high-impact projects and adapt to evolving business needs within a dynamic, fast-paced environment.
• Provide technical leadership and mentorship to the cybersecurity and engineering teams.

• 10+ years in cybersecurity, including 5+ years of hands-on coding, alongside deep expertise in threat modeling, code reviews, and offensive security methodologies.
• Solid working knowledge of Linux environments, including command-line proficiency, shell scripting, system hardening, and security configuration.
• Hands-on experience in penetration testing.
• Strong foundation in network protocols (IP, DNS, HTTP, SSL/TLS), cryptography (PKI, encryption at rest/in motion), and public cloud platforms (AWS, Azure, or GCP).
• Proficient in programming languages like C/C++, Java, JS, Python, Go, or Rust.
• Deep understanding of common vulnerability frameworks (OWASP Top 10, SANS CWE Top 25).
• Solid grasp of enterprise…