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User Interface (UI) Developer

RMantra
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Ashburn, VA, USA
Sep 20, 2026

US Citizens ONLY

Clearance

DoD TS or DHS Full BI

Work schedule

Hybrid

**This position REQUIRES onsite support in Ashburn, VA, 2 times a week**

Work Location

Ashburn, VA

In this hands-on User Interface (UI) Developer position, you will work collaboratively to architect, design, build, deliver, and enhance the user interfaces for highly available, scalable, real-time systems. You will exercise your judgment in determining and recommending the best designs based on customer business objectives, timelines, and other resource constraints. You will participate in and/or direct major deliverable of projects through all aspects of the software development life cycle including scope and work estimation, architecture and design, coding, and unit testing.

We’re looking for a highly skilled and experienced Senior Angular UI Developer to lead the greenfield development of a critical user interface application. This role demands a visionary who can build a robust, scalable, and testable UI from the ground up, ensuring it adheres to the highest standards of best practices. You’ll be instrumental in shaping the future of our front-end architecture, working closely with backend Java teams, and ensuring seamless deployment within a Kubernetes environment.

Responsibilities Qualifications

Responsibilities

  • Lead the design, development, and implementation of a new, complex Angular UI application from inception to deployment.
  • Define and enforce UI development best practices, coding standards, and architectural guidelines.
  • Collaborate closely with Java backend developers to understand API requirements and ensure seamless integration.
  • Drive thorough unit, integration, and end-to-end testing strategies for the UI application.
  • Architect and implement scalable and maintainable front-end solutions, considering future growth and evolving business needs.
  • Mentor junior developers and foster a culture of technical excellence within the UI team.
  • Ensure the UI application is optimized for performance, responsiveness, and user experience.
  • Work within an Agile Scrum methodology and contribute to a SecDevOps culture.
  • Oversee the deployment of the UI application into Kubernetes (K8s) environments.

Basic Qualifications

  • BS/BA degree and 12 years of related experience or Master’s with 10 years of related experience; OR 4 years of related experience in lieu of degree
  • Must be able to maintain and obtain a CBP Background Investigation prior to start
  • Must be a US citizen
  • 7+ years of experience in front-end development, with at least 5 years focused on modern JavaScript frameworks
  • Experience with Agile Scrum methodology and working in a SecDevOps environment
  • Experience working with containerized applications (Docker, Kubernetes)
  • Proven experience leading UI projects and building applications from the ground up.
  • 3+ years’ experience developing cloud ready applications
  • 4 years of hands-on experience with Angular (version 2+), demonstrating a deep understanding of its core principles, component-based architecture, routing, services, and state management.
  • Experience with front-end build tools and package managers (e.g., Webpack, Babel, NPM, Node.js).
  • Designing and implementing user interfaces using React.js, including building reusable components and managing application state.
  • Proficient in HTML5, CSS3, and JavaScript (ES6+), including DOM manipulation and the JavaScript object model.
  • Demonstrated experience working with RESTful APIs and Microservices, including expertise with HTTP request libraries like Axios.
  • Familiarity with the Java backend ecosystem and common patterns for UI/backend integration
  • Solid understanding of modern authorization mechanisms, such as JSON Web Token (JWT)

Preferred Qualifications

  • Strong understanding of React’s core principles, concepts, and workflows
  • Hands on working experience with NgRx for complex state management.
  • Hands on experience with more current specifications of EcmaScript (ES6)
  • Experience with common front-end development tools such as Babel, Webpack, NPM, Node etc.
  • Experience with UI testing frameworks (e.g., Jasmine, Karma, Jest, Cypress).
  • A strong portfolio or examples of previous Angular applications developed from scratch.
  • Experience with UI/UX design principles and best practices.
  • Demonstrated ability to benchmark and optimize UI application performance.
  • Familiarity with CI/CD pipelines for front-end applications.
  • Familiarity with real-time UI monitoring tools.
  • Active Full CBP BI
  • Experience with Google Cloud

If you are interested, please send an email to hr@rmantras.com">HR@rmantras.com

Job ID

user-interface-ui-developer|loc1

Security Clearance

Top Secret
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