Application Developer (Mid) ArcGIS Experience Builder

Job Title: Application Developer (Mid) – ArcGIS Experience Builder

Location: Washington, DC metro area (2 days contractor site)
Employment Type: Full-time
Clearance: Must be able to obtain and maintain a DHS Public Trust (Tier 4 / High-Risk Background Investigation); U.S. work authorization required
Program: Enterprise GIS support for a federal (DHS) geospatial mission

Position Summary
Aarnest is seeking a mid-level Application Developer with hands-on Esri ArcGIS Experience Builder experience to design, build, and maintain web-based geospatial applications supporting a Department of Homeland Security enterprise GIS program. You''''''''ll turn mission requirements into intuitive, map-centric web apps used by analysts and decision-makers.

Key Responsibilities

• Develop, configure, and customize web applications using ArcGIS Experience Builder (both low-code configuration and custom development via the Developer Edition).
• Build custom widgets, themes, and templates in Experience Builder using React/TypeScript and the ArcGIS Maps SDK for JavaScript.
• Integrate applications with ArcGIS Online and ArcGIS Enterprise (Portal) — consuming web maps, feature services, and REST/geospatial APIs.
• Collaborate with GIS analysts, cartographers, and system architects to translate requirements into functional, responsive applications.
• Troubleshoot, test, and optimize application performance, usability, and security in line with federal standards.
• Support deployment, documentation, and ongoing maintenance of delivered applications.

Required Qualifications

• 3–5 years of application development experience, including hands-on work with ArcGIS Experience Builder.
• Proficiency with the ArcGIS Maps SDK for JavaScript (or ArcGIS API for JavaScript).
• Strong JavaScript/TypeScript, React, HTML, and CSS skills.
• Experience with ArcGIS Online and/or ArcGIS Enterprise (Portal) — web maps, feature/map services.
• Ability to obtain a DHS Public Trust (Tier 4 / BI).
• Strong problem-solving skills and ability to work on-site in the DC area.

Preferred Qualifications

• Experience with Experience Builder Developer Edition and the Jimu framework.
• Familiarity with ArcGIS Pro, REST APIs, Git, and Agile/Scrum delivery.
• Prior federal/DHS program experience and an active or recent Public Trust.
• Esri technical certifications.

Education: Bachelor''''''''s degree in Computer Science, GIS, Geography, or related field — or equivalent experience.