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 dynamic charts, ArcGIS maps, filters, query builders, and downloadable datasets. The developer will own the UI layer, ensuring performance, accessibility, and long-term maintainability while collaborating with cross-functional teams to deliver a high-quality public data portal.
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
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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