Senior Full-stack Engineer - Model Zoo UI/API

Job Description Everforth ECS is seeking a Senior Full-Stack Engineer - Model Zoo UI/API to work in the National Capital Region covering the Pentagon, Falls Church, and Fairfax. Please Note: This position is contingent upon contract award. The War Data Platform (WDP) is a key initiative within the U.S. Department of War's (DoW) AI-First strategy introduced in early 2026. The WDP focuses on operational warfighting data and aims to accelerate the deployment of artificial intelligence (AI) on the battlefield. The WDP extends to Unclassified, Secret, and Top Secret environments, and supports collaboration between Combatant Commands, Joint Staff directorates, Senior Executive Service leaders, and operational analysts. The Senior Full-Stack Engineer - Model Zoo UI/API architects, advances, and sustains the Model Zoo's user interface and API capabilities across all WDP classification levels, enabling AI and machine learning model discovery, access request workflows, and operational deployment activities for the full range of WDP mission stakeholders. This role is central to delivering a resilient, domain-compliant, and operationally effective model-access experience across NIPRNet, SIPRNet, and JWICS environments. • Architects, advances, and sustains Model Zoo user interface and application programming interface capabilities across Unclassified, Secret, and Top Secret enclaves to support artificial intelligence and machine learning model discovery, request workflows, and operational deployment activities for Combatant Commands, Joint Staff elements, and Senior Executive Service leaders. • Designs scalable interface architectures integrating frontend frameworks, backend services, metadata services, and cross-domain access patterns that operationalize production-ready model availability within War Data Platform (WDP) Core Integration. • Implements enclave-specific deployment approaches, system hardening requirements, and functional parity controls to maintain consistent behavior across NIPRNet, SIPRNet, and JWICS environments. • Executes higher-domain release activities, validates runtime compatibility, and resolves domain-specific constraints affecting UI responsiveness, API throughput, model catalog retrieval, or workflow performance. • Develops secure integrations with identity and access management systems, audit logging pipelines, Zero Trust-aligned access controls, and operational monitoring tools governing DoW cybersecurity compliance. • Leads design reviews, contributes technical leadership, and collaborates with model-serving engineers, pipeline specialists, platform architects, and cybersecurity teams to synchronize UI/API services with model-serving workflows, test and evaluation gates, deployment pipelines, and operational readiness indicators. • Produces interface specifications, architecture diagrams, release documentation, and sustainment guides supporting enclave promotion activities and enterprise architecture alignment. • Strengthens War Data Platform (WDP) Core Integration mission value by delivering resilient, domain-compliant, and operationally effective model-access capabilities across all security environments. • Performs other duties as assigned. Required Skills • Current Secret security clearance with the ability to obtain and maintain a Top Secret (TS) security clearance with Sensitive Compartmented Information (SCI). • 10 or more years of experience in full-stack software engineering, with demonstrated proficiency in designing, building, and sustaining both user interface and API-layer capabilities for large-scale enterprise platforms. • Holds an active DoW IAT Level II baseline certification, which must be one of the following: CompTIA Security+ CE, CompTIA CySA+, CompTIA Cloud+, Cisco CCNA Security, GIAC GSEC, GIAC GCED, or ISC² SSCP. • Demonstrated experience implementing and maintaining API-driven application architectures that integrate frontend frameworks, backend services, and metadata or catalog systems within cloud-based or hybrid enterprise environments. • Hands-on experience deploying and sustaining applications across multiple classified or government-accredited security enclaves, including management of enclave-specific hardening requirements, functional parity controls, and cross-domain access patterns. • Strong problem-solving and decision-making capabilities, with a proven ability to weigh the relative costs and benefits of potential actions and identify the most appropriate solution. • Highly developed interpersonal and oral/written communication skills, with the ability to effectively and professionally interact with a diverse set of stakeholders (from peers to end-users to executive management). Desired Skills • Active Top Secret (TS) security clearance with Sensitive Compartmented Information (SCI) eligibility. • Prior experience supporting AI/ML model serving, model catalog, or model zoo platform development within DoW, Intelligence Community, Combatant Command, or CDAO-affiliated programs. • Familiarity with WDP-adjacent technologies including API management tools, workflow orchestration services, and AI/ML model serving frameworks such as vLLM, Ray, Amazon Bedrock, or Azure OpenAI operating across IL2, IL5, and IL6 environments. • Experience applying Zero Trust architecture principles, identity and access management integrations, and audit logging practices within government-accredited full-stack application environments, including compliance with DoW RMF requirements . • Proficiency with DevSecOps practices and CI/CD pipeline tooling—such as GitLab, Big Bang, or Platform One Software Factory—as applied to the build, test, and cross-domain promotion of full-stack application releases in classified environments. ECS Federal LLC is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law. Everforth ECS is the federal segment of Everforth, a $4B global organization with over 10,000 employees. Our nearly 3,500 professionals deliver advanced technology solutions in data and AI, cybersecurity, and enterprise transformation, serving defense, intelligence, and federal civilian agencies. Our work powers mission-critical outcomes, strengthens technology partnerships, and creates meaningful opportunities for our people. We are defined by a commitment to excellence in delivery, a culture of innovation, and an environment where talent can thrive and grow. We Value • Attracting and developing top talent and high-performing teams • Fostering a culture that is engaging, accountable, and mission-driven