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Sr Associate Software Engineer, AI Security

Northern Trust · Chicago, IL · $88,900–$151,100 a year · Full time

Posted Sep 22, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a cloud-native application you built and secured. What decisions did you make about identity and secrets?

What they are checking: Whether they have real experience securing cloud applications end to end.

Tell me about a time you built a user-facing application. How did you decide what the user needed to see?

What they are checking: Whether they can design interfaces, which the role requires alongside back-end work.

What would you do

A development team says the scanner flagged something that isn't a real issue and they're frustrated. How do you respond?

What they are checking: Whether they treat user feedback as a signal to improve the tool rather than dismissing it.

A new model version comes out. How would you decide whether to switch the scanner to it?

What they are checking: Whether they would evaluate with a test set and compare results rather than upgrade on hype.

About the work

Our platform uses frontier AI models to find, validate and report vulnerabilities in enterprise codebases. How would you cut down false positives so developers trust the results?

What they are checking: Whether they understand that a noisy scanner gets ignored, and know how to add validation steps around model output.

How would you design the pipeline that sends code to an AI model for analysis while keeping sensitive source code secure?

What they are checking: Whether they think about data handling, access control and where code goes when using external AI services.

What are some common vulnerability classes you'd expect the scanner to catch, and how would you confirm one is real?

What they are checking: Whether they know OWASP-style flaws well enough to validate findings rather than trust them blindly.

How would you defend the scanner itself against prompt injection hidden in the code it reads?

What they are checking: Whether they see that untrusted input can manipulate an AI system and know how to limit the damage.

How would you scale the scanner to run across thousands of repositories without huge cost or delay?

What they are checking: Whether they think about batching, caching, incremental scans and model costs.

How do you measure whether the scanner is actually making the firm's code more secure?

What they are checking: Whether they connect the tool to outcomes like fixed vulnerabilities, not just number of findings.

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The full job description

As published by Northern Trust.

About Northern Trust 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. We are seeking a Senior Associate 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. Platform Support • Serve as a developer for the AI Code Scanner platform • Implement modernization, enhancements, and scalability initiatives Front-End Development • Improve user experience, reporting dashboards, workflow management, and administrative capabilities • Implement secure authentication and authorization patterns Backend & AI Engineering • Maintain and extend orchestration and scanning services • Expand and manage integrations with LLM-based security analysis capabilities • Enhance automated vulnerability analysis, reporting, and verification workflows Experience • 5+ years of professional software engineering experience Technical Skills • Mid-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 • 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 Salary Range: $88,900 - 151,100 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. Work Authorization Applicants must be authorized to work in the U.S. without the need for employment-based visa sponsorship now or in the future. Northern Trust will not sponsor applicants for U.S. work visa status for this opportunity (no sponsorship is available for H-1B, L-1, TN, O-1, E-3, H-1B1, F-1, J-1, OPT, CPT or any other employment-based visa). Working with Us 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. Reasonable Accommodation Northern Trust is committed to working with and providing adjustments to individuals with health conditions and disabilities. If you need a reasonable accommodation for any part of the employment process, please email our HR Service Center at MyHRHelp@ntrs.com , or alternatively you can discuss your individual requirements with the recruiter you are working with.

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