Full Stack Developer UI/UX

District Partners LLC

$131K — $237K *
Information Technology
11 - 15 years of experience
Job Overview by Ladders

Qualifications

  • Active TS/SCI with Polygraph
  • BS degree with 12+ years of relevant experience, or equivalent experience in lieu of degree
  • Understanding of usability and accessibility issues for various devices
  • Proficiency in HTML5, SASS (or equivalent), CSS, and JavaScript for front-end development
  • Experience in PHP, MySQL, WP REST API, and JSON for back-end development
  • Ability to develop custom features and plugins for WordPress
  • Experience in unit testing and quality assurance.

Responsibilities

  • Create structured and maintainable WordPress themes from scratch
  • Develop WordPress plugins for custom site functionality
  • Enhance the website's back-end efficiency through database and server integration
  • Maintain and optimize existing WordPress themes and plugins
  • Conduct performance testing and implement enhancements for site speed
  • Monitor live website performance and troubleshoot user experience issues
  • Engage in both front-end and back-end development including site integrations.

Benefits

  • Collaborative and rapid-paced work environment
  • Opportunity to work on high-visibility mission applications
  • Involvement in innovative software projects
  • Direct impact on user experience for a significant audience
  • Potential for growth within a talented team of engineers.
Full Job Description

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



Original Posting:
May 29, 2026

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

The Leidos pay range for this job level is a general guideline onlyand 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.

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