Sr Principal Software Engineer, AI Security Platform

We are seeking a highly experienced Senior Principal Software Engineer to support technical development of our AI-powered Code Security Scanner platform. This platform leverages frontier AI models and advanced security automation to identify, validate, and report software vulnerabilities across enterprise codebases. This role will be responsible for ongoing development, architectural evolution, and long-term enhancement of the platform. The successful candidate must be equally comfortable designing user-facing applications, building automation, integrating AI services, and securing cloud-native solutions., * Serve as a lead technical developer for the AI Code Scanner platform.

• Implement modernization, enhancements, and scalability initiatives.
• Mentor junior team members.

Front-End Development

Improve user experience, reporting dashboards, workflow management, and administrative capabilities.

• Implement secure authentication and authorization patterns.

• Experience 15+ years of professional software engineering experience.
• 5+ years in a lead, principal, or senior engineering role.
• Experience supporting enterprise-scale applications in regulated environments.

Technical Skills

• Expert-level React development.
• Modern SPA architecture.
• REST APIs and authentication integrations.
• Expert-level Python development.
• API design and integration.
• Automation and orchestration frameworks.
• Test automation and quality engineering.
• Experience integrating Large Language Models (LLMs).
• Agent-based workflows and automation frameworks.
• Application security and vulnerability management.

$164,600 - 288,000 USD. Salary range is a good faith estimate of base pay., Northern Trust provides a comprehensive benefits package including retirement benefits (401k and pension), health and welfare benefits (medical, dental, vision, spending accounts and disability), paid time off, parental and caregiver leave, life & accident insurance, and other voluntary and well-being benefits.

Northern Trust also provides a discretionary bonus program that may include an equity component.

As a global leader in innovative wealth management, asset servicing, asset management and banking services, Northern Trust (Nasdaq: NTRS) is proud to guide the world’s most successful individuals, families, corporations and institutions. Since 1889, we have aligned our efforts with our three guiding Principles That Endure: Service, Expertise, and Integrity. Together, they reflect the three cornerstones of business conduct which we strive to instill in our employees, whom we call partners, and to provide to our clients and the communities we serve worldwide. With more than 135 years of financial experience and over 24,000 partners, we serve the world’s most sophisticated clients using leading technology and exceptional service., As a Northern Trust partner, you will be part of a flexible and collaborative work culture, which has a strong history of financial strength and stability. Movement within the organization is encouraged, senior leaders are accessible, and you can take pride in working for a company committed to an inclusive workplace and assisting the communities we serve. Philanthropy is deeply rooted in Northern Trust’s history and is an essential element of our culture. Employees around the world give their time and talent to work for the greater good of their communities., A global financial leader with more than 22,000 employees in 23 locations worldwide, Northern Trust empowers our employees to achieve more than just business goals. Our focus on work-life balance, career mobility and unique opportunities are just a few of the reasons we’ve been named one of the world’s most admired companies.