Application Security Engineer

Millennium Management LLC; Greater London; On-site; GBP 70,000 - 100,000; Full time

Job summary

A global financial firm seeks an Application Security Engineer with expertise in AI security and a deep understanding of secure coding practices. The candidate will define security strategies and conduct risk assessments for AI models while championing application security best practices. This role requires collaboration across teams and contributions to securing enterprise systems against various threats. Ideal candidates are proficient in coding and have experience in hybrid cloud environments.

Benefits

Collaborative work environment

Professional development opportunities

Qualifications

• 5+ years' experience working as an Application Security Engineer or similar role.
• Deep understanding of AI-specific risks and application security.
• Strong programming skills in Python, Java, C++, or C#.

Responsibilities

• Define and implement AI security strategies and guardrails.
• Conduct threat modeling and risk assessments for AI models.
• Lead application risk assessments and design reviews.

Skills

Application Security

AI Security

Secure Coding Practices

Collaboration with Global Teams

Risk Assessment

Education

Bachelor's degree in Computer Science, Computer Engineering, IT Security or related field

Tools

GitHub

Jenkins

Terraform

Secrets Management Tools

Job description

Overview

The successful candidate will be a subject matter expert with direct experience in a wide range of security technologies, tools, and methodologies. The role is suited for an experienced Application Security engineer with proven understanding in enterprise security and AI security and will focus on building toolsets and processes to drive adoption of secure practices across the enterprise. The team fosters a collaborative environment and is building a best-in-class program to partner with the business to protect the Firm's information and computer systems. Millennium is a complex and robust technical environment and securing the Firm from external and internal threats is a top priority.

Principal Responsibilities

• AI Security Strategy: Define and implement security guardrails for Generative AI, LLMs, and Agentic frameworks, ensuring safe enterprise adoption.
• AI Risk Management: Conduct specialized threat modeling, red teaming, and risk assessments for AI/ML models (e.g., testing for prompt injection, model theft, and data poisoning).
• Security Consulting: Lead risk management activities, including application risk assessments, design reviews, and mitigation strategies for IT projects.
• Lifecycle Engagement: Engage throughout the SDLC to identify vulnerabilities, conduct code reviews/penetration testing, and enforce secure coding standards.
• Program Development: Evangelize AppSec and AI security best practices through developer education, training materials, and outreach.
• Tooling & Architecture: Design robust security architectures and integrate automated security testing (SAST/DAST/SCA) into CI/CD pipelines.
• Stakeholder Liaison: Partner with Technology, Trading, Legal, and Compliance to create policies and communicate technical risks to non-technical stakeholders.

Qualifications/Skills Required

• Bachelor's degree or higher in Computer Science, Computer Engineering, IT Security or related field.
• 5+ years' experience working as an Application Security Engineer, Software Engineer, or similar role.
• Deep understanding of AI-specific risks (OWASP Top 10 for LLMs) and experience securing applications utilizing LLMs.
• Experience working with AI models, Agentic frameworks and security risks associated with AI.
• Experience in working with global teams, collaborating on code and presentations.
• Demonstrated work experience in hybrid on-premise and Public Cloud environments (AWS/GCP/Azure)
• Strong understanding of security architectures, secure configuration principles/coding practices, cryptography fundamentals and encryption protocols.
• Experience with common SCM & CI/CD technologies like GitHub, Jenkins, Artifactory, etc. and integrating Security Scanning and Vulnerability Management into the CI/CD Pipelines
• Familiarity with static and dynamic security analysis tools, and SCA/SBOM solutions.
• Hands on experience with Secrets Management & Password Vault technologies such as Delinea Secret Server and/or Hashicorp Vault, etc.
• Strong experience in secure programming in languages such as Python, Java, C++, C#, or similar.
• Familiarity with Infrastructure as Code tools (CloudFormation, Terraform, Ansible, etc.)
• Familiarity with web application security testing tools and methodologies.
• Knowledge of various security frameworks and standards such as ISO 27001, NIST, OWASP, etc.
• Knowledge of Linux, OS internals and containers is a plus.
• Certifications like CISSP, CISM, CompTIA Security+, or CEH are advantageous.