Application Security Engineer/ Brooklyn, NY (Hybrid-1 year contract

Application Security Engineer

Brooklyn, NY

Hybrid

3 days onsite.

One-year contract with the possibility of extension.

Position Overview

The Application Security Engineer is embedded within the Application Development team and ensures security is integrated into all stages of software development. The role focuses on designing and building secure applications while workin g closely with application administrators who manage security tools and CI/CD pipelines.

This position is responsible for enabling developers to produce secure, resilient, and compliant software for Clients 's web, mobile, API, GIS, and cloud-based systems supporting Fire, EMS, and administrative operations.

Core Responsibilities

1. Secure Software Development

• Establish and apply secure coding practices within the development team.
• Define and enforce secure coding standards for Java, .NET, Python, and JavaScript applications.
• Conduct secure design and architecture reviews for new and legacy systems.
• Educate developers on secure coding practices, authentication/authorization best practices, and common application vulnerabilities.
• Apply protections aligned with:
• OWASP Top 10
• OWASP API Security Top 10

2. Application & API Security

• Design and implement secure REST APIs and web services.
• Implement secure authentication/authorization using:
• SAML2
• OIDC
• OAuth2
• Secure Java and JavaScript applications, including:
• Spring Boot
• React
• Ensure secure handling of tokens, sessions, and secrets.
• Collaborate with App Admins and Security team to integrate applications into WAFs, load balancers, and other security monitoring tools.

Mandatory Qualifications

• Minimum 4+ years in secure application development.
• Prior hands-on software development experience.
• Strong understanding of:
• Web and mobile application architecture
• Internet protocols (HTTP, HTTPS, WebSockets)
• REST API security
• Expertise in SAST, DAST, and SCA concepts (understanding results and remediation), in collaboration with App Admins.
• Familiarity with security tools such as Veracode, Burp Suite, Zimperium, Prisma, Rapid7.
• Experience applying NIST 800-53 and 800-171 controls at the application design level.
• Strong analytical, troubleshooting, and problem-solving skills.
• Ability to work independently within a development-focused team.

Preferred Qualifications

• Experience with containerized applications (Docker, Kubernetes).
• Knowledge of:
• Core Java, J2EE, Spring Boot
• React, AngularJS, HTML5, CSS, JavaScript
• Experience designing secure GIS systems.
• Familiarity with public safety or emergency response systems.