Application Developer (Mid) ArcGIS Experience Builder

We are seeking a Mid-Level Application Developer to build and maintain geospatial web applications on Esri''''s ArcGIS Experience Builder in support of a U.S. Department of Homeland Security (DHS) program. Working alongside a senior Experience Builder developer, you''''ll configure Experience Builder apps and develop custom React/TypeScript widgets that integrate the ArcGIS Maps SDK for JavaScript with feature services and web maps - delivering accessible, reliable mapping and dashboard solutions for mission users. This position requires two days per week onsite in Washington, DC (mandatory)., * Build, configure, and maintain applications in ArcGIS Experience Builder

• Develop and extend custom Experience Builder widgets in React and TypeScript
• Integrate the ArcGIS Maps SDK for JavaScript (@arcgis/core) - map views, feature layers, spatial queries, and popups
• Consume ArcGIS REST services (Feature/Map services) and content from ArcGIS Online / ArcGIS Enterprise (Portal)
• Ensure Section 508 / WCAG 2.1 AA accessibility across app and map components
• Participate in Agile ceremonies; write clean, tested, documented code and take part in code reviews
• Work under the technical direction of the senior Experience Builder developer and follow established front-end standards

• U.S. Citizenship (required)
• 4+ years of application development experience, including 1-3 years hands-on with ArcGIS Experience Builder and/or the ArcGIS Maps SDK for JavaScript
• Proficiency with React and TypeScript
• Working knowledge of ArcGIS REST API, feature services, and web maps
• Experience with ArcGIS Online or ArcGIS Enterprise/Portal
• Solid HTML5, CSS3, JavaScript (ES6+), and Git-based workflows
• Familiarity with Section 508 / WCAG 2.1 AA accessibility
• Ability to work onsite in Washington, DC two days per week (mandatory)

Preferred / Good to Have

• Active or eligible U.S. federal Public Trust
• Custom Experience Builder widget development (manifest, data sources, widget lifecycle)
• Familiarity with the Calcite Design System (Esri''''s component library)
• Exposure to ArcGIS Dashboards, Instant Apps, or StoryMaps
• Python/ArcPy or REST/JSON integration experience
• Prior work on DHS or other federal programs; Agile (Scrum/SAFe) experience

Nice to Have

• Migrating apps from Web AppBuilder to Experience Builder
• Node.js/Express for backend-for-frontend patterns
• Testing with Jest / React Testing Library