Senior API Integration Developer Enterprise API Gateway

RESPONSIBILITIES: Design, build, and maintain RESTful services and API contracts published through the enterprise gateway, including OpenAPI specifications and versioningOnboard and refactor upstream applications to be consumed through the gateway, preserving functionality and external interfaces through the cutoverImplement token-based authentication and authorization in application code — OAuth 2.0 flows, JWT issuance and validation, claim and session handlingDevelop custom gateway plugins and policy modules where standard functionality does not meet the requirementMake the client-side and service-layer changes that gateway-mediated authentication and routing requirePackage and deploy services as containers on Red Hat OpenShift and promote them through Customer environments under Government change controlRemediate vulnerable and out-of-support dependencies across supported applications, working findings with cybersecurityExecute regression and smoke validation against every changed route and component before releaseProduce interface designs, technical documentation, and architectural decision records for systems as deliveredTroubleshoot end to end across gateway, service, database, and client layersDeliver in Agile ceremonies alongside Government product owners and other contractor teamsREQUIRED QUALIFICATIONSActive MBI suitability determination, current and transferable as of your start dateU.S. citizenship, as required for Customer contractor personnelTen years of hands-on application development and systems integration in production, including three years supporting a Federal system subject to FISMAJava and Spring Boot depth, building and consuming RESTful APIs and microservices at enterprise scaleDemonstrated integration of applications with an API gateway or reverse proxy, including routing, authentication, and rate limiting behaviorWorking command of OAuth 2.0, OpenID Connect, JWT validation, SAML federation, and TLS in application codeFront-end development in ReactJS or Angular sufficient to change how a client authenticates against and consumes a gateway-fronted APIContainer packaging and deployment on Kubernetes or Red Hat OpenShiftExperience migrating a production application onto new hosting or a new access path with functionality and external interfaces preservedDependency and vulnerability remediation across a supported application portfolioRegression and smoke validation of changed components, with defensible evidence of what was testedCI/CD pipeline work in Jenkins, GitHub Actions, or Azure DevOps, with Git-based source controlRelational database proficiency and SQL performance troubleshootingTechnical writing — interface control documents, design artifacts, and decision records that hold up under Government reviewBachelor's degree in Computer Science, Engineering, or Information Systems, or equivalent hands-on experiencePREFERRED QUALIFICATIONSAn active vendor certification on the program's API gateway platform, or willingness to earn it within 90 days of start with training providedDevelopment in Lua or Python sufficient to build custom gateway policy modulesPrior support to a Federal financial or tax administration programSingle sign-on integration against an enterprise identity provider such as ADFS, Ping Federate, or CA SiteMinderGraphQL, SOAP, or event-driven interfaces alongside RESTAn active cloud or platform certification such as AWS, Azure, or a Java or Spring credentialContribution to an SSP or other Federal authorization artifact