Senior Security Developer (Full Stack)

Company: C. Mack Solutions, LLC
Location: Ashburn
Posted on: February 19, 2026

Job Description:

Job Description Job Description Description: C. Mack Solutions is looking for a senior software developer/architect with a passion for government technology solutions to lead the implementation of security solutions across all layers of our infrastructure, though primarily in the application layer, and in the interactions between systems. The ideal candidate will relish the opportunity to tackle hard problems and find solutions within the environmental constraints that exist. They will also be able to serve as a technical lead, working independently and in coordination with other team members to communicate complex technical concepts and guide cross-functional teams through the development lifecycle. This is a great opportunity to work on mission-critical systems that bring clear value to our customers and end users on a daily basis. What You'll Be Doing: Engineer and deploy comprehensive security measures throughout the software lifecycle, from development to production, ensuring adherence to secure coding standards and safeguarding data Establish and maintain security architecture and policies specifically designed for AWS-based microservices environments Scale security solutions across diverse development teams and applications with varying architectural designs Analyze code scan outputs from tools like Anchore, WebInspect, and DBProtect, and collaborate with compliance teams to fine-tune and enhance scanning effectiveness Champion early-stage security integration by building and embedding tools that enforce security checkpoints within CI/CD workflows Integrate security checks into source control and pipelines to deliver prompt feedback and uncover insecure coding patterns early in the development process Perform vulnerability scans and penetration tests to detect and address security weaknesses proactively Apply ethical hacking techniques to uncover and remediate security flaws in both applications and infrastructure Promote secure development practices in Java, Python, and Angular by offering internal training and hands-on support for secure coding, deployment, and operations Deploy real-time security monitoring and alerting systems to swiftly identify and respond to potential threats Requirements: U.S. Citizenship is required. Candidate must be able to obtain CBP Public Trust clearance. Bachelor’s degree and over 10 years of hands-on experience in software development using Java, Python, and Angular Recent experience building applications in Java with Spring Boot framework Proven expertise in implementing security protocols such as TLS/SSL, IPsec, OAuth, OpenID Connect, SAML, HTTPS, and encryption/key management Solid grasp of Zero Trust security concepts and practical approaches to implementation Extensive experience working with AWS services and security tools, including IAM, VPC, CloudTrail, and AWS Security features Strong background in microservices and container technologies, including Docker and Kubernetes Track record of integrating security checks and controls into CI/CD pipelines Knowledgeable in network security, database systems, and hardware-level protections Exceptional analytical and troubleshooting abilities, with a keen eye for detail Effective communicator able to explain complex security topics to both technical and non-technical audiences Experienced in leading projects and mentoring team members to support growth and collaboration Collaborative mindset with the ability to work closely with developers, ISSOs, security engineers, architects, and other stakeholders involved in solution delivery Preferred Skills and Experience: Skilled in using ethical hacking tools and techniques to identify and address security vulnerabilities Holds relevant certifications such as Certified Ethical Hacker (CEH), Certified Information Systems Security Professional (CISSP), or AWS Certified Security – Specialty Experienced in contributing to large-scale initiatives involving multiple development and operations teams Familiar with working on federal government projects, including navigating compliance and regulatory requirements

Keywords: C. Mack Solutions, LLC, Leesburg , Senior Security Developer (Full Stack), IT / Software / Systems , Ashburn, Virginia