Backend API Developer

Backend API DeveloperPosition Summary The 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 ResponsibilitiesService Design & DevelopmentUpstream Integration & View StateReal-Time DeliveryAuthorization & Content FilteringEvent-Triggered ServicesPerformance, Reliability & OperationsCollaborationRequired QualificationsExperience 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 QualificationsExperience 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.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: 40Travel Required: Less than 10%Telecommuting Options: OnsiteWork Location: USA VA ArlingtonAdditional Work Locations: Total Rewards at GDITOur benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.Our Identity Verification Process:As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.About Our Work:We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.