Backend API Developer

Backend API DeveloperThe Backend API Developer builds and operates the service layer behind an operator application in a cyber command center supporting national cyber defense across Critical Infrastructure and government partners. Responsibilities focus on low-latency service delivery, correctness under load, and strict entitlement enforcement.Key Responsibilities:Service Design & DevelopmentUpstream Integration & View StateReal-Time DeliveryAuthorization & Content FilteringEvent-Triggered ServicesPerformance, Reliability & OperationsCollaborationRequired Qualifications:Experience building and operating production service interfaces at scale.Experience integrating with upstream services and maintaining derived state.Knowledge of push/streaming delivery, connection lifecycle, and backpressure.Experience with server-side authorization models.Experience with containerized deployment and cloud environments.Experience instrumenting services and supporting production incidents.BS in computer science or engineering and 8+ years relevant experience (or equivalent).Public Trust eligibility and U.S. citizenship.On-site work in the Washington, D.C. metro area (not remote or hybrid).Preferred Qualifications:Experience with streaming platforms (Kafka, MSK, Event Hubs).Experience with API gateways or service meshes.Experience with serverless functions (Lambda, Azure Functions).Experience supporting latency-sensitive operational systems.Experience delivering software in regulated environments.Current cloud developer/associate certification.GDIT Is Your Place At GDIT, the mission is our purpose, and our people are at the center of everything we do. Growth: AI-powered career tool that identifies career steps and learning opportunities Support: An internal mobility team focused on helping you achieve your career goals Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off Community: Award-winning culture of innovation and a military-friendly workplace Own Your Opportunity Explore a career in data science and engineering at GDIT and you'll find endless opportunities to grow alongside colleagues who share your determination for solving complex data challenges.The likely salary range for this position is $119,000 - $161,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: Less than 10% Telecommuting Options: Onsite Work Location: USA VA Arlington