Mid Frontend Developer Jobs in Frederick, MD (NOW HIRING)

Ready to design technology that makes a difference? At Leidos, you'll help shape the future of intelligence operations by creating intuitive, high-impact user experience for mission-critical systems. As a UI/UX Engineer supporting a premier Intelligence Community customer, you'll turn complex challenges into elegant solutions, working alongside innovative teams to deliver capabilities that strengthen national security. This is an opportunity to see your designs move beyond the screen and directly support real-world missions of national importance.

Leidos Intelligence Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security operations, and decision analytics to support our defense and intel customers' mission to defend against evolving threats around the world. Our team's focus is to ensure our customers have the right tools, technologies, and tactics to keep pace with an ever-evolving security landscape and succeed in their pursuit to protect people and critical assets.

Geospatial Analyst Solutions Directorate, part of the National Solutions Business Area, is currently seeking a skilled and experienced Mid-Level UI/UX Engineer for the Maru Program.The Maru Program delivers mission-critical, modern software solutions across our customer's enterprise using Agile,DevSecOps, and cloud-native methodologies.

As a UI/UX Engineer, you will design and develop intuitive, user-centered interfaces for mission-critical applications. This role bridges design and engineering, focusing on creating seamless user experiences while delivering production-ready front-end solutions.

The ideal candidate has a strong foundation in user experience design, front-end development, and usability principles, with the ability to translate complex technical workflows into clean, efficient, and accessible interfaces. This individual will work closely with backend engineers, product owners, and end users to improve usability, performance, and overall user satisfaction.

Citizenship & Security Clearance Requirements

• U.S. Citizenship
• Active TS/SCI with the ability to successfully pass a Polygraph examination

Essential Responsibilities

• UI/UX Design & Implementation: Design and develop intuitive, responsive user interfaces for web-based applications
• User Experience Optimization: Translate complex workflows into simple, efficient user experiences that improve usability and adoption
• Front-End Development: Build and maintain front-end components using modern frameworks (e.g., React, Angular, or similar)
• Usability & Accessibility: Ensure applications meet usability standards and accessibility best practices
• Design Systems: Contribute to and maintain consistent design patterns, components, and style guides
• User Research & Feedback: Gather and incorporate user feedback to continuously improve interface design and functionality
• Cross-Functional Collaboration: Work closely with backend engineers, product teams, and stakeholders to align UI/UX with system capabilities
• Performance Optimization: Improve front-end performance, responsiveness, and scalability

Basic Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related field with4-8 years of relevant experience or Master's degree with2-6 years of relevant experience
• Strong experience with front-end technologies (JavaScript, HTML, CSS)
• Experience with modern UI frameworks (React, Angular, etc.)
• Demonstrated experience designing user-centered interfaces for complex applications
• Understanding of UX principles, usability, and interaction design
• Experience working in Linux-based environments
• Ability to translate user needs into functional design solutions

Preferred Qualifications

• Experience with design tools (Figma, Sketch, Adobe XD)
• Experience with data visualization tools (e.g., Grafana or similar)
• Familiarity with REST APIs and backend integration
• Exposure to CI/CD pipelines and front-end deployment workflows
• Experience working in Agile environments
• Experience designing and developing intuitive user interfaces for data-driven GEOINT applications.

#NSBA

#Maru

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.

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.