Senior Federal Web Software Developer — Health Apps

Unissant; Washington (District of Columbia); On-site; USD 90,000 - 140,000; Full time

Job summary

Unissant, Inc. is seeking a Web Software Developer to support a newly awarded program for a federal health agency.

Develop and maintain accessible web interfaces and supporting components for agency customers and business users. The ideal candidate brings practical delivery experience, sound judgment, and a collaborative approach to maintaining Federal business applications while improving technical capability.

Qualifications

• Minimum 7 years of experience developing and maintaining web application interfaces using HTML, CSS, and JavaScript or an assigned framework.
• Ability to integrate web interfaces with backend services and handle data validation and error states.
• Understanding of responsive design, browser compatibility, and accessible interaction patterns.
• Experience debugging browser behavior and application performance issues.
• Experience with version control, peer review, automated testing, and secure web development.
• Ability to collaborate with content owners, designers, analysts, and backend engineers.
• Ability to document work clearly, protect sensitive program information, and collaborate across Government and contractor teams.
• Ability to meet federal suitability and access requirements and provide on-site support in the Bethesda, Maryland area as directed.

Responsibilities

• Implement approved web pages, application features, reusable components, and integration with backend services.
• Translate requirements and design guidance into responsive interfaces that work across supported browsers and devices.
• Apply accessible HTML structure, keyboard behavior, form validation, and Section 508 design practices.
• Develop and maintain unit and interface tests; support regression, browser, and accessibility testing.
• Troubleshoot display, behavior, performance, and data integration issues with analysts and engineers.
• Maintain source code and configuration under review and address security and code-quality findings.
• Support controlled deployments, release documentation, user feedback, and ongoing maintenance of assigned sites.
• Support transition knowledge transfer and maintain current technical or process documentation for assigned responsibilities.
• Coordinate assigned work with program leadership, Government stakeholders, and related teams; report blockers and dependencies promptly.
• Use Government-approved tools and handle program data within authorized environments. Validate any AI-assisted output before it informs delivery decisions.

Skills

Web development

Front-end integration

Accessibility

Collaboration

Documentation

Government compliance

Education

Degree in Computer Science / Information Systems / Engineering

Tools

HTML

CSS

JavaScript

Job description

Unissant, Inc. is seeking a Web Software Developer to support a newly awarded program for a federal health agency.

Develop and maintain accessible web interfaces and supporting components for agency customers and business users. The ideal candidate brings practical delivery experience, sound judgment, and a collaborative approach to maintaining Federal business applications while improving technical capability.