Web Developer Security Engineer

About DMI

DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. With a focus on end-to-end managed IT services, including managed mobility, cloud, cybersecurity, network operations, and application development, DMI supports public sector agencies and commercial enterprises around the globe. Recognized as a Top Workplace, DMI is committed to delivering secure, efficient, and cost-effective solutions that drive measurable results. Learn more at www.dminc.com

About the Opportunity

DMI is seeking a Web Developer Security Engineer to embed security throughout the software development lifecycle for a federal agency client. In this role, you will identify and remediate vulnerabilities in web applications and APIs, integrate security controls into application architectures, and support compliance with federal cybersecurity frameworks — functioning at the intersection of development and security.

Duties and Responsibilities:

Identify, analyze, and remediate critical vulnerabilities, logic flaws, insecure dependencies, and misconfigurations in web applications and APIs

Drive end-to-end vulnerability lifecycle management, including threat modeling, security assessments, and technical validation of remediation

Integrate security controls into application architectures and APIs; advise on secure design patterns and data protection mechanisms

Review and analyze web server and application logs to detect anomalies and indicators of compromise; implement threat intelligence automation

Deploy, tune, and maintain Web Application Firewalls (WAF) tailored to custom-developed applications and traffic patterns

Configure and manage File Integrity Monitoring (FIM) solutions to detect and alert on unauthorized changes to web content directories

Implement DevSecOps principles throughout the CI/CD pipeline; develop security metrics and compliance reporting against established baselines

Ensure web applications and cloud infrastructure comply with NIST SP 800-53, FISMA, and FedRAMP requirements; participate in audits and risk assessments

Provide Tier II support for security operations and recommend ongoing security enhancements

Qualifications

• Education and Years of Experience:

• Bachelor's degree or higher in Computer Science, Cybersecurity, Information Systems, Engineering, or a related field

• Minimum 3 years of experience in Web Application Security, Application Security Engineering (AppSec), or SSDLC

• Proficiency in .NET (C# MVC, WCF), HTML5, CSS3, JavaScript, REST APIs, and SQL

• Strong understanding of OWASP Top 10 and secure coding standards

• Experience deploying and managing WAF solutions for custom-developed web applications

• Experience configuring FIM solutions for web content and application directories

• Familiarity with security testing tools, including Wireshark, SIEM, IDS/IPS, NDR, and EDR

• Ability to leverage AI-assisted development tools (e.g., GitHub Copilot, OpenAI API) for security automation and compliance auditing

• Experience implementing DevSecOps principles, including security gate integration in CI/CD pipelines

• Active security certifications across AppSec, offensive security, and foundational security domains, maintained for a minimum of 5 years

• Required Skills & Certifications:

• In-depth experience with federal cybersecurity frameworks, including NIST SP 800-53, FISMA, and FedRAMP authorization processes

• Proven background in threat modeling, risk assessment, and security architecture design

• Advanced experience with CI/CD pipeline security gate automation

• Cloud security experience with AWS and container security (Docker, Kubernetes)

• Clearance Requirements: Must possess or be eligible to obtain and complete a government security screening and/or a Secret security clearance.

• Citizenship Status Required: Must be a U.S. Citizen

• Physical Requirements: None required for this position.

• Location: Remote, US

• Minimum Salary Rate $77,800.00 Median Salary Rate $85,341.00 Working at DMI

• DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together:

• Do What’s Right – We lead with honesty and integrity.

• Own the Outcome – We take responsibility and deliver.

• Deliver for Our Customers – We are relentless about delivering value.

• Think Bold, Act Smart – We innovate with purpose.

• Win Together – We collaborate and celebrate our success.

• These values aren’t just ideals—they show up in how we support every part of your well-being:

• Convenience/Concierge – Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.

• Development – Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive.

• Financial – Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future.

• Recognition – Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements.

• Wellness – Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health.

• DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together.

• ***************** No Agencies Please *****************

• Applicants selected may be subject to a government security investigation and must meet eligibility requirements for access to classified information. US citizenship may be required for some positions.