Job Title
Frontend Developer (Data Visualization & GIS)
Overview / Summary
HTC is seeking a Frontend Developer to build a public-facing Data Explorer for the Public Health Data Portal. This role focuses on developing a modern, responsive interface that enables users to interact with health data through charts, ArcGIS maps, filters, query builders, and downloadable datasets. The developer will own the UI layer, ensuring performance, accessibility, and maintainability while collaborating with cross-functional teams.
Key Responsibilities
Frontend Development & User Experience
- Design and develop a responsive, accessible UI for a public-facing data exploration portal integrated into data.azdhs.gov
- Build interactive UI components such as tree navigation, query builders, filter panels, and visualization control panels
- Develop reusable frontend components to support scalable and maintainable architecture
- Ensure consistent user experience aligned with branding and design guidelines
Data Visualization & Geospatial Mapping
- Build interactive charts using Chart.js or D3.js for analytical views (time-series, bar, multi-series)
- Integrate ArcGIS Maps SDK for JavaScript using ArcGIS Enterprise REST endpoints
- Implement choropleth, feature, and basemap visualizations linked to ArcGIS Story Maps
- Enable seamless interaction across maps, charts, tables, and filters
- Implement dataset export and download workflows
API Integration & Performance
- Consume RESTful APIs for dynamic data rendering and state management
- Collaborate with backend teams to define API contracts and optimize query efficiency
- Optimize frontend performance for data-heavy, high-concurrency environments
- Implement save query and shareable URL functionality with responsive rendering
Accessibility, Quality & Testing
- Ensure compliance with ADA, Section 508, and WCAG 2.1 AA standards
- Integrate automated accessibility validation tools (pa11y, axe-core) into CI/CD pipelines
- Write and maintain unit and integration tests using Jest
- Collaborate with QA Automation for regression testing and accessibility validation
Required Qualifications
- 5+ years of experience in modern frontend development using JavaScript / TypeScript
- Strong experience with HTML5, CSS3, and component-based 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 similar geospatial tools
- Experience consuming RESTful APIs for dynamic data rendering and state management
- Strong understanding of ADA, Section 508, and WCAG 2.1 AA accessibility standards
- Experience with unit and integration testing frameworks such as Jest
- Ability to collaborate with cross-functional teams in an Agile environment
Preferred Qualifications
- Experience building public-facing portals or data exploration tools
- Experience with filter-driven or query-builder interfaces
- Experience optimizing UI performance for large datasets and high concurrency
- Experience with CI/CD pipelines (Jenkins, Azure DevOps)
- Familiarity with PHP 8.x / CodeIgniter 4 templating
- Experience in government, healthcare, or public-sector projects
What Makes HTC A Great Place To Build Your Future
HTC Global Services wants you to join our team. Come build new things with us and advance your career. At HTC Global, you ll collaborate with experts, work alongside clients, and be part of high-performing teams driving success together. You ll have long-term opportunities to grow your career and develop skills in the latest emerging technologies.
At HTC Global Services, our employees have access to a comprehensive benefits package. Benefits can include Group Health (Medical, Dental, and Vision), Paid Time Off, Paid Holidays, 401(k) matching, Group Life and Disability insurance, Professional Development opportunities, Wellness programs, and a variety of other perks.
Our success as a company is built on inclusion and diversity. HTC Global Services is committed to providing a workplace free from discrimination and harassment, where every employee is treated with dignity and respect. We celebrate differences and believe that diverse cultures, perspectives, and skills drive innovation and success. HTC is an Equal Opportunity Employer and a proud National Minority Supplier. We seek to empower each individual, fostering an environment where everyone feels valued, included, and respected.
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