Senior Security Architect - Threat Modeling & Secure Apps

bullish; Greater London; On-site; GBP 120,000 - 160,000; Full time

Job summary

Bullish in London is seeking a senior cybersecurity architect to secure our trading and data platforms. You will lead threat modeling, design secure software across web, API, and trading platforms, and guide cross-functional teams in a fast-paced environment.

Candidates bring 10+ years in cybersecurity with hands-on coding, cloud experience, and expertise in security tooling. On-site role based in SoHo, London, reporting to the CISO Americas.

Qualifications

• 10+ years in cybersecurity with hands-on coding and threat modeling.
• Strong knowledge of network protocols, cryptography, and cloud platforms.
• Experience with secure software development and security tooling.

Responsibilities

• Build complex threat models for critical systems and establish defenses.
• Collaborate with Product, Engineering, and Infrastructure to ship secure software.
• Lead global security initiatives and build AI-powered tooling for efficiency.
• Assess vulnerabilities and deliver actionable recommendations with KPIs.
• Drive high-impact projects in a dynamic, fast-paced environment.
• Provide technical leadership and mentorship to teams.

Skills

Cybersecurity expertise

Threat modeling

Coding experience

Cloud platforms

Security tooling

Communication skills

Independent contributor

Tools

SAST tools

DAST tools

CI/CD tooling

Job description

Bullish in London is seeking a senior cybersecurity architect to secure our trading and data platforms. You will lead threat modeling, design secure software across web, API, and trading platforms, and guide cross-functional teams in a fast-paced environment.

Candidates bring 10+ years in cybersecurity with hands-on coding, cloud experience, and expertise in security tooling. On-site role based in SoHo, London, reporting to the CISO Americas.