Frontend Developer

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Job Title: Frontend Developer

Location: Arizona

Duration: 3 to 4 Months

Highly prefer candidates in Arizona – can try remote.

Key Responsibilities:

Frontend Development \& User Experience

Design and develop a responsive, accessible public-facing portal UI for data exploration and visualization integration.

Build interactive UI components such as tree navigation, query builders, filter panels, and visualization control panels

Develop clean, reusable frontend components for scalable and maintainable UI architecture

Ensure consistent user experience aligned with branding standards and design guidelines

Data Visualization \& Geospatial Mapping

Build interactive chart visualizations using Chart.js or D3\.js for analytical views (time-series, bar, multi-series)

Integrate ArcGIS Maps SDK for JavaScript using ArcGIS Enterprise v11\.5 REST endpoints

Implement choropleth, feature, and basemap visualizations linked to ArcGIS Story Maps

Support user interactions across maps, charts, tables, and filters for seamless data exploration

Implement dataset export and download workflows supporting multiple formats

API Integration \& Performance

Consume RESTful APIs for dynamic data rendering, filtering, and state management

Collaborate with Backend Data Engineer to define API contracts and optimize query efficiency

Optimize frontend performance for data-heavy, interactive user experiences

Implement save query and shareable URL functionality with responsive rendering

Accessibility, Quality \& Testing

Ensure compliance with ADA, Section 508, and WCAG 2\.1 AA accessibility standards

Integrate automated accessibility validation tools (pa11y, axe-core) in CI/CD pipelines

Write and maintain unit and integration tests using Jest

Partner with QA Automation for regression testing and accessibility validation

Required Qualifications:

5\+ years of experience developing modern, responsive frontend applications using JavaScript / TypeScript

Strong experience with HTML5, CSS3, and modern UI frameworks (React, Vue, or equivalent) and vanilla JavaScript

Experience with Chart.js, D3\.js, or similar data visualization libraries

Experience integrating ArcGIS Maps SDK for JavaScript or comparable mapping libraries

Experience consuming RESTful APIs for dynamic data rendering and state management

Strong understanding of ADA, Section 508, and WCAG 2\.1 AA accessibility standards with hands-on remediation

Experience writing unit and integration tests with Jest or similar frameworks

Ability to collaborate with backend, QA, architecture, and delivery teams in an Agile environment