Everforth ECS is seeking a Backend/API Engineer 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 separates business and financial data from operational warfighting data, aiming 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 Backend/API Engineer is responsible for designing, building, and sustaining the backend services and API infrastructure that enable secure, scalable access to AI and machine learning models across WDP Core Integration's mission environments. This role sits at the intersection of software engineering, AI/ML operationalization, and DevSecOps delivery, ensuring that production model endpoints, service meshes, and deployment automation pipelines meet the performance, security, and mission assurance standards required across WDP's enterprise application ecosystem.
• Designs, builds, and maintains backend services and application programming interfaces that operationalize artificial intelligence and machine learning model access across War Data Platform (WDP) Core Integration mission environments.
• Implements automated workflows for configuring API endpoints, proxy layers, routing patterns, and service registration logic that provide consistent and secure access to production model artifacts within Unclassified networks.
• Develops scalable serving frameworks using Kubernetes services, API gateways, service meshes, containerized runtime environments, and model-hosting orchestration patterns to support five to ten new endpoints or services per Program Increment while sustaining ten to thirty active production models.
• Implements automated configuration pipelines that bind model artifacts to endpoint specifications, integrate with cross-domain promotion workflows, and align deployment logic with WDP Core Integration's security architecture, enclave requirements, and model evaluation gates.
• Develops reusable backend components, authentication modules, logging interfaces, and monitoring instrumentation using tools such as Flask, FastAPI, NGINX, Envoy, Prometheus, and distributed tracing platforms to strengthen operational visibility and reliability.
• Coordinates with model-serving engineering, cyber engineering, and platform operations teams to establish routing rules, proxy behaviors, and security controls supporting mission assurance standards across the DoW.
• Conducts performance tuning, scalability analysis, and defect remediation to maintain consistent responsiveness and fault tolerance across enterprise workloads.
• Produces service specifications, interface definitions, architecture diagrams, runbooks, and operational metrics that advance WDP Core Integration program value by increasing model accessibility, deployment velocity, and integration consistency across enterprise applications.
• Performs other duties as assigned.
• Current Secret security clearance.
• A minimum of 3 years of experience in backend software engineering, API development, or a closely related discipline within a federal, defense, or enterprise technology environment, with demonstrated proficiency designing and operating scalable, production-grade backend services and API infrastructure in support of AI/ML model deployment or data platform programs.
• Active IAT Level II certification, satisfied by one of the following: CompTIA Security+ CE, CompTIA CySA+, CompTIA Cloud+, Cisco CCNA Security, GIAC GSEC, GIAC GCED, or ISC² SSCP.
• Demonstrated hands-on experience building and consuming diverse API architectures, including REST and SOAP (via WSDL/XML); deep understanding of API lifecycle management, payload optimization, data serialization formats (JSON, XML), and interface contract definition.
• 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).
Skills Required
- 3 years of experience in backend software engineering or API development
- Current Secret security clearance
- Active IAT Level II certification or equivalent
- Hands-on experience with REST and SOAP API architectures
- Strong communication skills with diverse stakeholders
ECS Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about ECS and has not been reviewed or approved by ECS.
-
Healthcare Strength — ECS advertises multiple national-network medical plan options with HSA eligibility alongside dental and vision coverage. Coverage generally begins quickly and is paired with company-paid short- and long-term disability, adding stability to the health package.
-
Retirement Support — A 401(k) with Safe Harbor and immediate vesting on employer contributions is emphasized, with an employer match available. Access to an employee stock purchase plan via the parent company provides an additional savings avenue.
-
Parental & Family Support — Paid parental leave up to 30 days, adoption assistance, and other family-oriented leaves are highlighted. Feedback suggests these offerings add meaningful value beyond base pay for many roles.
ECS Insights
What We Do
ECS, a segment of ASGN (NYSE: ASGN), delivers advanced solutions and services in cloud, cybersecurity, artificial intelligence (AI), machine learning (ML), application and IT modernization, and science and engineering. The company solves critical, complex challenges for customers across the U.S. public sector, defense, intelligence and commercial industries. ECS maintains partnerships with leading cloud, cybersecurity, and AI/ML providers and holds specialized certifications in their technologies. Headquartered in Fairfax, Virginia, ECS has more than 3,400 employees throughout the U.S. and has been recognized as a Top Workplace by The Washington Post for the last five years.
