Application Security Engineer

Tempus AI; Chicago (IL); On-site; USD 85,000 - 130,000; Full time

Job summary

Tempus AI is seeking an Application Security Engineer to weave security into the software development lifecycle, securing AI/LLM-enabled systems and APIs. You will partner with product and engineering teams to perform risk-based security assessments and guide remediation across web apps, cloud services, and automation pipelines.

The role focuses on threat modeling, security reviews, and building secure-by-default patterns, with frequent collaboration across multidisciplinary teams.

Qualifications

• 3–5 years of experience in application security, penetration testing, or security-focused software engineering.
• Hands-on experience testing web applications, APIs, and cloud-hosted services using proxy tools (e.g. Burp Suite) and knowledge of common security flaws (OWASP) and mitigations.
• Experience performing security design reviews at the architecture level.
• Experience securing AI/LLM-enabled applications, including prompt injection and data leakage concerns.
• Proficiency with at least one threat modeling method (STRIDE, PASTA, attack trees).
• Experience with SAST, DAST, and SCA tools and integrating them into CI/CD pipelines.
• Proficiency in Python, Go, or JavaScript for security tooling and automation.
• Solid understanding of TCP/IP, HTTP/S, OAuth/OIDC, and cryptography fundamentals.
• Ability to collaborate with software teams and product managers.
• Excellent written and verbal communication skills.

Responsibilities

• Embed security into the SDLC through threat modeling, design reviews, security requirements, and secure coding reviews with product and development teams.
• Plan and conduct application security assessments and penetration tests of web applications, APIs, and cloud-hosted services, documenting findings with risk ratings and remediation guidance.
• Threat model and assess AI/LLM-enabled features, including guardrails, permissions, and data access controls.
• Select, integrate, and tune SAST, DAST, SCA, and secrets scanning in CI/CD pipelines.
• Build automation and guardrails that prevent common vulnerabilities.
• Use AI-assisted tooling to scale code review, triage, and remediation with human validation.
• Reproduce, triage, and prioritize vulnerabilities with developers through remediation.
• Communicate risk and business impact to teams and leadership.
• Design, implement, and document application security controls, standards, and secure coding guidance.
• Support the vulnerability disclosure program.
• Coach developers on secure design and coding through consulting and training.

Skills

Web security testing

API security

Cloud security

OWASP Top 10

Threat modeling

CI/CD security

Python/Go/JS

Communication

Tools

Burp Suite

Job description

Passionate about precision medicine and advancing the healthcare industry? Recent advancements in underlying technology have finally made it possible for AI to impact clinical care in a meaningful way. Tempus's proprietary platform connects an entire ecosystem of real-world evidence to deliver real-time, actionable insights to physicians, providing critical information about the right treatments for the right patients, at the right time.

About The Role

As an Application Security Engineer, you will secure how Tempus builds software, from design through release. You will partner with product and engineering teams to build security into the software development lifecycle (SDLC), and you will assess our applications and APIs the way an attacker would, through security assessments and penetration tests. The applications you secure handle sensitive clinical and genomic data and increasingly include AI-powered capabilities, so securing AI and LLM-enabled systems is a core part of the role. You will own well-defined application security problems within your team's scope, with guidance from your lead.

What You'll Do

• Embed security into the SDLC through threat modeling, design reviews, security requirements, and security-focused code reviews with product and development teams.
• Plan and conduct application security assessments and penetration tests of web applications, APIs, and cloud-hosted services, and document findings with clear risk ratings and practical remediation guidance.
• Threat model and assess AI and LLM-enabled features (agents, RAG pipelines, tool and MCP integrations), including adversarial prompt testing and validation of guardrails, permissions, and data access controls.
• Select, integrate, and tune SAST, DAST, software composition analysis, and secrets scanning in CI/CD pipelines.
• Build automation, secure-by-default patterns, and guardrails that prevent whole classes of vulnerabilities.
• Use AI-assisted tooling to scale code review, triage, and remediation, applying human judgment to validate the results.
• Reproduce, triage, and prioritize application security vulnerabilities, and work with developers through to remediation.
• Communicate the nature, severity, and business risk of security issues to development teams and leadership.
• Design, implement, and document application security controls, standards, and secure coding guidance.
• Run and support the vulnerability disclosure program.
• Coach developers on secure design and coding through consulting, training, and everyday collaboration.

What You'll Bring

• 3-5 years of experience in application security, penetration testing, or software engineering with a security focus.
• Hands-on experience testing web applications, APIs, and cloud-hosted services, using proxying and penetration testing tools (e.g. Burp Suite), and strong command of common security flaws and mitigations (e.g. OWASP Top 10).
• Experience performing security design reviews at the architecture level
• Working experience securing AI and LLM-enabled applications: how they are designed and how they fail, including prompt injection, data leakage, excessive agency, and insecure output handling (e.g. OWASP Top 10 for LLM Applications).
• Practical experience with at least one threat modeling method (e.g. STRIDE, PASTA, attack trees).
• Experience with SAST, DAST, and SCA tools and integrating them into CI/CD pipelines.
• Proficiency in Python, Go, or JavaScript for security tooling and automation, and the ability to read and review code.
• Solid understanding of network and web protocols (TCP/IP, HTTP/S), authentication and authorization (e.g. OAuth/OIDC), and cryptography fundamentals.
• Able to work well with software development teams and Product Managers.
• Excellent written and verbal communication, with the ability to explain complex topics clearly and concisely.

Bonus Points For

• Hands-on AI red teaming or security testing of agentic or RAG systems; familiarity with MITRE ATLAS or the NIST AI Risk Management Framework
• Experience with Docker, Kubernetes, GCP or AWS, and infrastructure-as-code scanning
• Bug bounty or vulnerability disclosure program experience
• Experience with HIPAA and healthcare data protection
• An interest in working in biotech, genomics, and precision medicine
• Certifications such as GWAPT, OSCP, CSSLP, CISSP, or ISC2 CC (Certified in Cybersecurity)

CHI: $85,000-$130,000 The expected salary range may vary for other locations. Actual salary may vary based on qualifications and experience. Tempus offers a full range of benefits, which may include incentive compensation, restricted stock units, medical and other benefits depending on the position.

We are an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.