User Interface (UI) Developer Job at Leidos in Ashburn

Overview The National Security Sector within Leidos is seeking a User Interface (UI) Developer with strong systems, software, and Agile experience to support a complex program to provide Agile development for critical systems on a mission-critical program supporting the Passenger Systems Program Directorate (PSPD) within Customs and Border Protection (CBP). PSPD supports the Department of Homeland Security (DHS) and CBP critical missions, specifically screening and processing travelers at the ports of entry (POEs) into the United States.

In this hands-on 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 are 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 will 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.

This position requires the candidate to be in Ashburn, VA, twice a week.

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).

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 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

Original Posting July 10, 2025

Pay Range Pay Range $126,100.00 - $227,950.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About the company We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets.

Notice Talentify is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.

Talentify provides reasonable accommodations to qualified applicants with disabilities, including disabled veterans. Request assistance at accessibility@talentify.io or 407-000-0000.

Federal law requires every new hire to complete Form I-9 and present proof of identity and U.S. work eligibility.

An Automated Employment Decision Tool (AEDT) will score your job-related skills and responses. Bias-audit & data-use details : www.talentify.io / bias-audit-report . NYC applicants may request an alternative process or accommodation at aedt@talentify.io or 407-000-0000.

#J-18808-Ljbffr