Application Developer (Mid) - ArcGIS Experience Builder (React/TypeScript)

*Location:* Washington, DC — *2 days/week onsite (mandatory)*, remote the remaining days · *Citizenship:* *U.S. Citizen (required)* · *Type:* Full-Time (W-2) · *Experience:* 4–7 years Read the overview of this opportunity to understand what skills, including and relevant soft skills and software package proficiencies, are required. *About the Role* 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).* *Key Responsibilities* * 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 *Required Qualifications* * *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) *Nice to Have* xxoysbn * Migrating apps from Web AppBuilder to Experience Builder * Node.js/Express for backend-for-frontend patterns * Testing with Jest / React Testing Library * 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 Pay: $65.00 - $85.00 per hour Application Question(s): * Are you a U. S Citizen * Able to commute 2 days On Site in DC * Do you have active Public Trust * Do you have experience in GIS Ability to Commute: * Washington, DC 20001 (Required) Work Location: Hybrid remote in Washington, DC 20001