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Appsec Jobs in Missouri (NOW HIRING)

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 ...

US Corp2Corp

Cloud Security Engineer

Saint Louis, MO · On-site

Develop an AppSec pipeline and integrate it into the agile software development process. Required Qualifications: BA/BS degree in Computer Science, Information Systems, Cyber Security or a related ...

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Appsec information

What is the difference between Appsec vs Security Analyst?

AspectAppsecSecurity Analyst
Required CredentialsCertifications like CISSP, CEH, OSCP; knowledge of secure codingCertifications such as Security+, CISSP; threat analysis skills
Work EnvironmentDevelopment teams, secure coding practices, application testingMonitoring security systems, incident response, risk assessment
Employer & Industry UsageTech companies, software firms, organizations with application security needsAll industries, including finance, healthcare, government, focusing on security monitoring

Appsec professionals focus on securing applications through secure coding, testing, and vulnerability management, while Security Analysts monitor and respond to security threats across systems. Both roles require security certifications and work in overlapping environments, but their core responsibilities differ in scope and focus.

Is Appsec entry level?

Application security (AppSec) roles can be entry-level or require experience, depending on the position. Entry-level AppSec jobs typically focus on basic security practices, vulnerability assessments, and may require foundational knowledge of security tools and programming. More advanced roles often demand prior experience, certifications, or specialized skills in areas like penetration testing or secure coding.

Is application security in demand?

Application security (AppSec) professionals are in high demand due to increasing cyber threats and the widespread adoption of digital services. Organizations seek skilled experts to identify vulnerabilities, implement security measures, and ensure compliance, often requiring knowledge of security tools, coding, and certifications like CISSP or CEH.

Will AI replace appsec engineers?

AI is unlikely to fully replace application security (AppSec) engineers, as their role involves complex analysis, decision-making, and understanding of context that current AI tools cannot replicate. Instead, AI can augment their work by automating routine tasks like vulnerability scanning and code analysis, allowing engineers to focus on more strategic security measures. Continuous learning and expertise in security tools, coding, and threat assessment remain essential for AppSec professionals.

What are popular job titles related to Appsec jobs in Missouri?

For Appsec jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Appsec jobs in Missouri look for?

The top searched job categories for Appsec jobs in Missouri are:

Appsec jobs near you
Infographic showing various Appsec job openings in Missouri as of August 2026, with employment types broken down into 50% Full Time, and 50% Contract. Highlights an 50% In-person, and 50% Remote job distribution.

Application Security Engineer

Stellar IT Solutions LLC

Saint Louis, MO • Remote

$60 - $70/hr

Contractor

Posted 16 days ago

Job description

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.