Xml Developer Jobs in Frederick, MD (NOW HIRING)

Job Title: Mid-Level Blazor UI Developer

Employment Type: Full-Time W-2 Contract (1-Year Contract with potential for extension)
Work Location: Rockville, MD
Work Authorization: Candidates must be legally authorized to work in the United States. Visa sponsorship is not available for this position.

Position Overview

The Mid-Level Blazor UI Developer will support the U.S. Government Publishing Office's (GPO) XPub modernization program, a major initiative replacing GPO's legacy Microcomp composition engine with a modern, document-centric publishing platform. The developer will contribute to the Horseshoe Editor, a Blazor Server-based application used to create, edit, proof, approve, and publish legislative and regulatory documents for Congress and Federal agencies.

This hands-on development role focuses on building and maintaining Blazor Server user interface components, translating XML content into interactive HTML, implementing browser-based user interactions, and integrating client-side functionality with C# application logic. The successful candidate will collaborate with Government technical staff and Agile development teams while following established coding standards, security practices, and software development processes.

Essential Duties and Responsibilities

• Develop and maintain Blazor Server UI components supporting document-centric web applications.
• Translate XML document structures into interactive HTML for display and editing within the application.
• Build reusable UI components using C#, Razor, HTML, CSS, and JavaScript.
• Implement browser event handling including input, change, focus, keyboard, mouse, and selection events.
• Utilize JavaScript interoperability (JS Interop) to retrieve and process user selections, edits, and browser DOM state.
• Work directly with the browser Document Object Model (DOM) to support rich editing functionality.
• Follow established CSS methodologies such as BEM to create maintainable and scalable user interfaces.
• Develop secure client-side and server-side code consistent with Government security requirements.
• Participate in code reviews and ensure compliance with coding standards and architectural guidelines.
• Manage source code using Azure DevOps Git repositories, including branching, merging, pull requests, and code reviews.
• Resolve software defects and implement incremental enhancements within Agile sprint cycles.
• Participate in sprint planning, sprint reviews, backlog refinement, and other Agile ceremonies.
• Create and maintain technical documentation supporting development, configuration, deployment, and operational support.
• Maintain issue tracking and work-item documentation within Azure DevOps and Government-approved tracking systems.
• Provide regular development status updates and collaborate with the Contracting Officer's Representative (COR), Project Manager, and development team.

Required Qualifications

• Minimum five (5) years of professional experience developing web-based applications.
• Minimum five (5) years of experience using:
• • C#
  • JavaScript
  • HTML
  • CSS
• Demonstrated experience developing applications using Blazor Server.
• Experience working directly with the browser Document Object Model (DOM).
• Experience implementing JavaScript Interop within Blazor applications.
• Experience translating XML document structures into HTML-based user interfaces.
• Working knowledge of XML elements, attributes, hierarchical structures, and document semantics.
• Experience with structured XML standards such as DITA, DocBook, or comparable XML schemas.
• Experience implementing event-driven UI functionality integrated with backend C# logic.
• Experience using Azure DevOps Git for source control, branching, merging, and code reviews.
• Experience resolving UI defects and implementing application enhancements.
• Ability to work independently while collaborating effectively within Agile software development teams.
• Strong analytical, troubleshooting, and problem-solving skills.
• Strong written and verbal communication skills.

Preferred Qualifications

• Experience supporting Federal Government software development projects.
• Experience developing document-centric authoring or editing platforms.
• Experience modernizing legacy enterprise applications.
• Working knowledge of BEM (Block Element Modifier) CSS methodology or equivalent.
• Familiarity with modern ECMAScript standards and ESLint conventions.
• Experience supporting enterprise publishing or content management systems.
• Experience using Azure DevOps work-item tracking.
• Experience producing technical documentation supporting software development and operations.
• Experience collaborating directly with Government stakeholders and technical teams.

Required Certifications

Candidates must possess at least one (1) of the following certifications (or an approved Government equivalent):

• Microsoft Certified: Azure Developer Associate (AZ-204)
• Microsoft Certified: .NET Developer (current or legacy equivalent)
• CIW Advanced HTML5 & CSS3 Specialist
• CIW JavaScript Specialist

Additional Requirements

• Ability to comply with Government network access, VPN, and system security requirements.
• Experience working in Agile/Scrum software development environments.
• Ability to produce clear technical documentation, development artifacts, and status reports.
• Ability to participate in code reviews and adhere to Government coding standards, security guidelines, and architectural practices.
• Ability to support software releases, defect resolution, and ongoing maintenance activities throughout the contract period.