Senior Full Stack Developer

Senior Full Stack Developer Hybrid | Integrated Data Environment & Global Transportation Network Convergence (IGC) | Secret Clearance Required

If you are passionate about full-stack development, application modernization, and mission-critical technology and want to help modernize transportation and logistics systems supporting the Department of Defense, we would love to talk.

Why This Role Exists The work we do has real impact, and the people behind it matter just as much.

D&G Support Services is seeking an experienced Senior Full Stack Developer to support the IGC Contract's application modernization, software development, and secure delivery initiatives. In this role, you will design, develop, integrate, test, and maintain secure enterprise web applications, APIs, and supporting services used across transportation, logistics, reporting, and analytics capabilities.

This position offers the opportunity to modernize legacy functionality while working across front-end and back-end development, enterprise integrations, databases, cloud environments, containers, CI/CD, and cybersecurity.

What You Will Do • Design, develop, test, deploy, and maintain secure enterprise web applications, APIs, microservices, and system integrations using technologies such as Java, C#, Python, JavaScript/TypeScript, React, Angular, Spring Boot, .NET, or comparable frameworks. • Develop application workflows, business logic, validation, error handling, authentication, authorization, and role-based access controls while modernizing legacy components for improved maintainability, scalability, security, and cloud readiness. • Develop RESTful APIs, web services, and data-access components integrating applications with relational databases, external interfaces, reporting services, and analytics platforms such as Apache Superset. • Develop and optimize SQL, views, stored procedures, and application data-access logic supporting user-facing capabilities, system integrations, and approved database modernization activities, including Amazon Aurora where implemented. • Develop unit, integration, and automated tests and support regression testing, defect resolution, GVT/GAT, sprint demonstrations, release-readiness reviews, and production support. • Use Git and established GitLab CI/CD processes to build, test, validate, and deploy application changes within approved cloud and containerized environments. • Apply secure coding practices and remediate applicable SAST, STIG/SRG, dependency, and secure-configuration findings. • Provide technical leadership through design and code reviews, mentoring, technical documentation, modernization recommendations, and collaboration with architects, developers, BI and database teams, cloud/DevSecOps, cybersecurity personnel, testers, Product Owners, functional analysts, and Government stakeholders.

What We Are Looking For

Required • Eight or more years of professional software-development experience, including design and delivery of complex enterprise applications. • Strong full-stack development experience across front-end and back-end application layers using technologies such as Java, C#, Python, JavaScript/TypeScript, React, Angular, Spring Boot, .NET, or comparable technologies. • Experience developing RESTful APIs, web services, microservices, and enterprise-system integrations. • Experience refactoring or modernizing legacy applications while preserving required functionality, interfaces, and business capabilities. • Working knowledge of relational databases, SQL, data-access patterns, and application-to-database integration. • Experience with Git, CI/CD-based software delivery, automated testing, and defect remediation. • Experience applying secure coding practices and resolving application-security findings. • Familiarity with containerized and cloud-hosted application environments. • Bachelor's or Master's degree in Computer Science, Cybersecurity, Data Science, Software Engineering, Information Technology, Information Systems, or a related software-engineering discipline; or one of the following certifications: FITSP-D, GCSA, GISF, or SSCP. • Strong technical leadership, troubleshooting, documentation, mentoring, and stakeholder-communication skills.

Preferred • Experience supporting U.S. Transportation Command, Department of Defense logistics, or another mission-critical federal system. • Experience integrating applications with business-intelligence or analytics platforms such as Apache Superset. • Experience with Oracle, PostgreSQL, Amazon Aurora, Amazon RDS, or comparable relational database platforms. • Experience developing applications for containerized AWS environments. • Experience with Section 508 accessibility requirements and user-facing application development in a federal environment. • Familiarity with DoD Risk Management Framework, STIG/SRG requirements, and secure software-development practices.

Clearance and Eligibility • Active Secret security clearance or the ability to obtain and maintain one, as required by assigned duties and contract requirements. • This role is restricted to U.S. person(s) (U.S. citizens, permanent residents, and other protected individuals under 8 U.S.C. 1324b(a)(3)).

Location • Hybrid • Remote work may be authorized consistent with program requirements. • Personnel must be available for required on-site meetings, testing, demonstrations, release activities, classified-system access, or other assigned mission needs at Scott Air Force Base, Illinois.

Who We Are

At D&G Solutions, people come first; our teammates, customers, and the communities we serve. We are one of the fastest growing companies in the Washington, DC area and proud to be recognized nationally as a Best Place to Work. As an 8(a), Service Disabled Veteran Owned, and Women Owned Small Business, we bring ownership, accountability, and care to everything we do. We also deeply believe in giving back and proudly support organizations such as Homes for Our Troops, SemperK9, and Wreaths Across America.

Our teams are welcoming, collaborative, and deeply committed to mission success. We believe great work happens when people feel supported, respected, and trusted, and we work hard to create that environment every day.

What We Offer

Competitive salary | Comprehensive benefits | 401(k) | Bonus and profit sharing | Flexible hours | Education reimbursement | Generous paid time off

Final Note

If you want to work for a company that cares about its people, contribute to a mission that truly matters, and be part of a team where you are valued for who you are as well as what you do, we would love to hear from you.