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Senior Application Security Engineer Jobs in Missouri

Stellar IT Group

Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

Application Security Engineer (Senior AppSec) Location: Remote Duration: 6-12+ Months Contract Role Overview We are seeking experienced Senior Application Security Engineers to join our team and play ...

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

What You'll Be Doing The AI-Application Security Engineer is responsible for implementing and scaling technical security controls and security processes across internally developed applications and ...

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

What You'll Be Doing The AI-Application Security Engineer is responsible for implementing and scaling technical security controls and security processes across internally developed applications and ...

Stifel

AI-Application Security Engineer

Saint Louis, MO · On-site

$57 - $76.25/hr

The AI-Application Security Engineer is responsible for implementing and scaling technical security controls and security processes across internally developed applications and AI-enabled systems.

Walmart

(USA) Staff, Application Security Engineer

Noel, MO · On-site

$110K - $220K/yr

Option 1: Bachelor's degree in computer science, information technology, engineering, information systems, cybersecurity, or related area and 4 years' experience in application security, or related ...

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All JobsApplication Security Engineer JobsSenior Application Security Engineer JobsSenior Application Security Engineer Jobs in Missouri

Senior Application Security Engineer information

See Missouri salary details

$68.9K

$128.6K

$174.9K

How much do senior application security engineer jobs pay per year?

As of Sep 2, 2026, the average yearly pay for senior application security engineer in Missouri is $128,629.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,400.00 and $147,300.00 per year, depending on experience, location, and employer.

What is a senior application security engineer?

A Senior Application Security Engineer is responsible for ensuring the security of software applications by identifying vulnerabilities, implementing security best practices, and working with development teams to integrate secure coding principles. They conduct security assessments, perform threat modeling, and use security tools to detect and remediate risks. Additionally, they help establish security policies, oversee compliance with industry standards, and provide guidance to developers and stakeholders on security-related matters. Their goal is to protect applications from cyber threats while enabling business continuity and innovation.

What are the key skills and qualifications needed to thrive as a senior application security engineer?

To thrive as a Senior Application Security Engineer, you need a solid understanding of secure software development, threat modeling, vulnerability assessment, and a degree in computer science or a related field. Familiarity with tools like static and dynamic application security testing (SAST/DAST), code review platforms, and certifications such as CISSP or OSCP are often required. Strong analytical thinking, attention to detail, effective communication, and the ability to collaborate are standout soft skills for this role. These capabilities help ensure robust protection of applications, support safe software delivery, and enable effective teamwork across engineering and security teams.

What are the typical responsibilities of a senior application security engineer on a day-to-day basis?

A Senior Application Security Engineer typically spends their days reviewing application code for security vulnerabilities, performing threat modeling, and collaborating closely with development teams to ensure secure coding practices are followed. They may also lead security assessments, coordinate penetration tests, and work on developing or enforcing security policies within the organization. Regular interaction with cross-functional teams, such as DevOps and IT, is common to address security issues throughout the software development lifecycle. This role also often involves mentoring junior engineers and staying up to date with the latest security threats and technologies.

What are the most commonly searched types of Application Security Engineer jobs in Missouri?

The most popular types of Application Security Engineer jobs in Missouri are:

What are popular job titles related to Senior Application Security Engineer jobs in Missouri?

For Senior Application Security Engineer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Senior Application Security Engineer jobs in Missouri look for?

The top searched job categories for Senior Application Security Engineer jobs in Missouri are:

What cities in Missouri are hiring for Senior Application Security Engineer jobs?

Cities in Missouri with the most Senior Application Security Engineer job openings:

Senior Application Security Engineer jobs near you
Infographic showing various Senior Application Security Engineer job openings in Missouri as of August 2026, with employment types broken down into 75% Full Time, 19% Part Time, and 6% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution, with an average salary of $128,629 per year, or $61.8 per hour.

Application Security Engineer

Stellar IT Group

Saint Louis, MO • On-site

$57 - $76.25/hr

Contractor

Posted 20 days ago

Job description

Overview:
Position: Application Security Engineer (Senior AppSec)
Location: Remote
Duration: 6-12+ Months Contract
Role Overview
We are seeking experienced Senior Application Security Engineers to join our team and play a critical role in validating AI-generated vulnerability findings and translating them into actionable technical remediation. This position requires strong expertise in application and product security, combined with a deep understanding of how vulnerabilities map to code and how developers remediate them in production environments. The ideal candidate will have a background as a software engineer who transitioned into AppSec, bringing both security insight and practical development knowledge.
Key Responsibilities
  • Validate AI-generated vulnerability findings (e.g., from Anthropic's Mythos) and assess exploitability, severity, and business impact.
  • Trace vulnerabilities to their technical root cause at the code level.
  • Collaborate with development teams to design and implement secure remediation strategies.
  • Conduct secure code reviews, threat modeling, and vulnerability assessments.
  • Define and enforce secure SDLC practices across product teams.
  • Provide guidance on API security, OWASP Top 10 risks, and secure design principles.
  • Partner with product owners and engineering teams to ensure vulnerabilities are remediated effectively and deployed safely.
  • Document findings, remediation steps, and best practices to strengthen organizational security posture.
Required Skills
  • Strong background in Application Security / Product Security.
  • Hands-on experience with OWASP Top 10, SAST, vulnerability assessment, secure SDLC, threat modeling, code review, API security.
  • Ability to validate findings, assess severity, and trace vulnerabilities to root cause.
  • Experience working directly with developers to remediate vulnerabilities.
  • Strong communication skills to bridge security and engineering teams.
Ideal Profile
  • A software engineer turned AppSec professional - someone who understands both the security problem and how developers actually fix it.
  • Proven ability to work across multiple product teams, enabling secure development practices.
  • Experience with modern CI/CD pipelines and integrating security tooling into developer workflows.

Skills:
Vulnerability,threat,security

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