Application Security Engineer

About Us

Red Cell Partners is an incubation firm building and investing in rapidly scalable technology-led companies that are bringing revolutionary advancements to market in three distinct practice areas: healthcare, cyber, and national security. United by a shared sense of duty and deep belief in the power of innovation, Red Cell is developing powerful tools and solutions to address our Nation’s most pressing problems. 

About Andesite:

After decades defending the nation's most sensitive networks, we founded Andesite with a clear mission: to build security products that transform how humans and AI collaborate to defend against increasingly sophisticated cyber threats.

We’re a diverse team of cyber and security experts, passionate technologists, and experienced product builders. We come from some of the largest national security, tech, cybersecurity, and data organizations on the planet.

We've raised more than $38 million from investors like General Catalyst and Red Cell Partners.

The future of cybersecurity isn't about better technology alone—it's about reimagining how humans and machines work together. Come build with us.

The Role:

Andesite is looking for an Application Security Engineer to join our cybersecurity operations.  In this role, you will secure software applications and cloud environments and identify and mitigate vulnerabilities throughout the development lifecycle - this includes performing application threat modeling, reviewing source code, managing SAST/DAST/SCA tools, and contributing to secure design and architecture reviews.  This position requires maintaining confidentiality, integrity, and availability of stakeholders' information and systems. You will facilitate and support vulnerability assessments and gap analysis to identify deficiencies and areas requiring remediation. Deliver real-time threat response through SIEM-driven monitoring, detection, and investigation.

The Application Security Engineer will resolve problems independently and work closely with other departments in a fast-paced, dynamic environment to ensure the organization’s applications, cloud and DevSecOps initiates are secure and compliant with relevant regulations, standards, compliance, and customer requirements. Additionally, you will help educate and empower engineering teams to adopt secure development practices through guidance, training, and collaboration.

What You’ll Do:

• Product Security: Proactively find security weaknesses during design, development, testing, and deployment phases, and work with teams to remediate them before they reach production.
• Application Threat Modeling and Secure Design Reviews: Analyze application components, data flows, and trust boundaries to anticipate potential threats and integrate security into architectural decisions early.
• Application Security Operations: Manage and maintain SAST, DAST, and SCA tooling: Configure, tune, and operationalize static, dynamic, and software composition analysis tools to support scalable and effective application security testing.
• Code Review: Conduct manual and automated code reviews to detect insecure coding patterns, logic flaws, and injection risks, ensuring code adheres to secure development standards.
• DevSecOps: Develop and maintain custom scripts and tools to automate security tasks, enhance visibility, and integrate security into development and operational workflows.
• Cloud Engineering: Enforce least privilege, secure network architectures, and strong identity and access controls across cloud accounts and services.
• System Monitoring: Monitor computer networks and systems with SIEM to identify vulnerabilities and respond to security threats and attacks.
• Vulnerability management: Support with scanning, tracking, and remediating security vulnerabilities across systems and applications.
• Educate: Provide training, documentation, and hands-on guidance to developers and engineers to build a strong security culture and shift security left in the SDLC.
• Professional Development: Stay current with industry developments and best practices through training, conferences, and other professional development activities.

Who You Are:

• 4+ years of experience in application security, secure software development, or a similar security-focused engineering role.
• 2+ years of hands-on experience securing cloud-native applications and infrastructure.
• Deep understanding of secure design principles, threat modeling, and software risk assessment.

Technical Skills - Application Security:

• Proficient in at least one programming language.
• Strong knowledge