Principal AI Security Platform & Harness Engineer

• Design, build and operate AI-powered vulnerability scanning harnesses and supporting platform capabilities.
• Develop integrations with large language models and AI platforms.
• Create and maintain prompt frameworks, agent workflows and security-focused AI orchestration logic.
• Build scalable scanning infrastructure supporting large-scale repository and application analysis.
• Optimise harness performance, throughput, cost efficiency and model utilisation.
• Develop validation, verification and false-positive reduction mechanisms.
• Integrate AI scanning capabilities into software development and security workflows.
• Evaluate new AI models, scanning techniques and agentic security approaches.
• Develop supporting tooling for scan execution, scheduling, orchestration and reporting.
• Enhance contextual analysis by incorporating security controls, architecture data and remediation intelligence.
• Work closely with AppSec, Vulnerability Operations and software engineering teams to drive adoption.
• Contribute to secure platform design, isolation controls, monitoring and operational resilience.
• Support research and innovation in agentic AI, automated vulnerability discovery and AI-assisted security testing.

• Minimum of 8 years of related experience
• Bachelor's degree preferred and/or equivalent experience

Talents Needed for Success:

• 6+ years of software engineering experience with strong emphasis on Python and distributed systems development
• Deep expertise building scalable software platforms, test harnesses, frameworks, or orchestration platforms
• Strong experience integrating Large Language Models through APIs and SDKs
• Experience building evaluation frameworks, benchmarking systems, automated testing platforms, or AI experimentation environments
• Experience designing and maintaining multi-model orchestration workflows across Claude, OpenAI, Bedrock, or equivalent platforms
• Strong experience developing microservices and APIs using Python and/or Java
• Experience building data processing pipelines, queue-based architectures, and event-driven systems
• Experience with Docker, Kubernetes, OpenShift, and cloud-native deployments
• Experience operating applications within AWS environments
• Experience building automated testing frameworks, regression suites, and validation pipelines
• Experience handling structured outputs, prompt engineering, model evaluation, and result normalisation
• Experience designing scalable ingestion, correlation, and analysis pipelines
• Strong understanding of software engineering best practices, testing, observability, and operational excellence
• Experience with Git, Bitbucket, Jenkins, Jira, and modern CI/CD tooling, * Experience developing AI scanning harnesses, agent frameworks, or autonomous workflow systems
• Experience working with security scanning technologies and vulnerability discovery platforms
• Familiarity with application security concepts and vulnerability management processes
• Experience designing AI model evaluation and accuracy measurement frameworks

Full time

Are you ready to make an impact at DTCC? Do you want to work on innovative projects, collaborate with a dynamic and supportive team, and receive investment in your professional development? At DTCC, we are at the forefront of innovation in the financial markets. We are committed to helping our employees grow and succeed. We believe that you have the skills and drive to make a real impact. We foster a thriving internal community and are committed to creating a workplace that looks like the world that we serve.

The Information Technology group delivers secure, reliable technology solutions that enable DTCC to be the trusted infrastructure of the global capital markets. The team delivers high-quality information through activities that include development of essential, building infrastructure capabilities to meet client needs and implementing data standards and governance.

Pay and Benefits:

• Competitive compensation, including base pay and annual incentive
• Comprehensive health and life insurance and well-being benefits, based on location
• Pension / Retirement benefits
• Paid Time Off and Personal/Family Care, and other leaves of absence when needed to support your physical, financial, and emotional well-being.
• DTCC offers a flexible/hybrid model of 3 days onsite and 2 days remote (onsite Tuesdays, Wednesdays and a third day unique to each team or employee).

With over 50 years of experience, DTCC is the premier post-trade market infrastructure for the global financial services industry. From 20 locations around the world, DTCC, through its subsidiaries, automates, centralizes, and standardizes the processing of financial transactions, mitigating risk, increasing transparency, enhancing performance and driving efficiency for thousands of broker/dealers, custodian banks and asset managers. Industry owned and governed, the firm innovates purposefully, simplifying the complexities of clearing, settlement, asset servicing, transaction processing, trade reporting and data services across asset classes, bringing enhanced resilience and soundness to existing financial markets while advancing the digital asset ecosystem. In 2024, DTCC's subsidiaries processed securities transactions valued at U.S. $3.7 quadrillion and its depository subsidiary provided custody and asset servicing for securities issues from over 150 countries and territories valued at U.S. $99 trillion. DTCC's Global Trade Repository service, through locally registered, licensed, or approved trade repositories, processes more than 25 billion messages annually. To learn more, please visit us at www.dtcc.com or connect with us on LinkedIn, X, YouTube, Facebook and Instagram. DTCC proudly supports Flexible Work Arrangements favoring openness and gives people freedom to do their jobs well, by encouraging diverse opinions and emphasizing teamwork. When you join our team, you'll have an opportunity to make meaningful contributions at a company that is recognized as a thought leader in both the financial services and technology industries. A DTCC career is more than a good way to earn a living. It's the chance to make a difference at a company that's truly one of a kind.