Full Stack Developer UI/UX

Leidos has immediate opportunities for a UI/UX Engineer to join a team building innovative software supporting the Sponsor’s Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. We're supporting a well-established customer that is responsible for critical and high-visibility missions applications used by a wide audience. Our team is tremendously talented, and we need to add a talented and creative UIUX Engineer to the team.

As a UI/UX Engineer you will build custom and accessible websites, with the user experiences in mind for both admins and end users. You will optimize code within the code base, assist with design, implementation and deployment, and partner on QA testing and bug-fixing. Your role will help determine appropriate tools, methods, and solutions for projects, bridging design, development, and production of websites. The position requires strong organizational and time management skills as individuals work in a fast-paced environment with multiple projects. Successful candidates must be hands-on but also strategic, with excellent communication skills.

Primary Responsibilities: Proven ability to create well-structured and maintainable WordPress site themes from scratch.

Proficiency in developing WordPress plugins to support custom site functionality and integrations.

Good eye for design and attention to detail

Improve the overall efficiency of the website’s back-end including database and server integration

Maintain and optimize the WordPress theme and plugins

Conduct website performance tests, and execute performance enhancements to improve site speed

Monitor the performance of the live website and troubleshoot content and user experience issues that arise

Responsible for both back-end and front-end development including the implementation of WordPress themes and plugins as well as site integration

Effective interpersonal and communication skills are required to perform well as a member of a rapid paced, cross-functional team environment.

Utilize agile development methodology

Required Qualifications Active TS/SCI with Polygraph

Requires BS degree and12+ years of prior relevant. Additional experience in lieu of degree.

Understanding of usability and accessibility issues across all device types

Experience with WordPress front-end development using the following technologies: HTML5, SASS (or equivalent preprocessor)/CSS, and JavaScript

Experience with WordPress back-end development using the following technologies: PHP, MySQL, WP REST API, JSON

Developing custom features and functionality for WordPress

Creating WordPress plugins

Producing unit testing and QA

Developing and Testing for Accessibility

Desired Qualifications Certification - Amazon Web Services (AWS)

FIP If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting: May 29, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: Pay Range $131,300.00 - $237,350.00 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.