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Senior UI​/UX Web Developer

Job in Fort Belvoir, Fairfax County, Virginia, 22060, USA
Listing for: Open Systems Technologies Corporation
Full Time position
Listed on 2026-06-26
Job specializations:
  • IT/Tech
    UI/UX Design, Web Developer
Salary/Wage Range or Industry Benchmark: 70000 - 100000 USD Yearly USD 70000.00 100000.00 YEAR
Job Description & How to Apply Below

Overview

Open Systems Technologies Corporation is a leader in the government contracting marketplace, providing Enterprise Security and Cloud Computing solutions to support large organizations. Our capabilities include supplying federal government entities and private businesses with software development, scientific and engineering technical assistance, systems integration and enterprise security. Since its founding in 1996, OST has been committed to delivering high-quality, best-in-class results that bring added value to our clients, while investing in our employees’ futures by providing exciting projects to work on, and robust benefits to include technical training and certifications, relocation assistance and a 401K match with immediate vesting.

Responsibilities
  • Design wireframes, user flows, storyboards, and interactive prototypes to visualize and communicate user experiences.
  • Translate design mockups into production-ready, clean, and maintainable front-end code using HTML5, CSS3, and JavaScript.
  • Conduct user research, define user personas, and perform usability testing to refine and optimize user journeys.
  • Ensure websites and web applications are fully responsive, fast-loading, and compliant with accessibility standards (WCAG).
  • Collaborate closely with product managers, backend engineers, and marketing teams to align design solutions with business objectives.
  • Utilize design tools such as Figma, Sketch, Adobe XD, or Adobe Creative Suite to create high-fidelity UI/UX assets.
  • Implement and maintain front-end solutions using modern JavaScript frameworks (e.g., React, Vue.js, Angular).
  • Employ version control systems (e.g., Git) to manage and document code changes.
  • Apply strong problem-solving skills and user-centered design principles to deliver seamless and engaging digital experiences.
Requirements
  • US Citizen (Dual Citizens accepted if they have an active clearance)
  • Active Secret Clearance Required
  • Possession of Security+ or equivalent
  • Proficiency in Adobe Creative Suite.
  • Development

    Languages:

    Strong command of HTML5, CSS3, Java, and JavaScript.
  • Frameworks:
    Experience with modern JavaScript frameworks such as React, Vue.js, or Angular.
  • Version Control:
    Familiarity with Git or other version control systems, ideally Git Lab.
  • Problem-Solving:
    Strong critical thinking and an obsession with user-centered design principles
Benefits

OST is an Equal Opportunity Employer and has been operating since 1996 providing support on various contracts with Government agencies. We offer a comprehensive benefits package that includes 3 weeks paid time off, 11 Federal Holidays, medical/dental coverage, STD, LTD, Life Insurance, AD&D, 401k with up to 4% match, and end-of-year profit sharing.

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Position Requirements
10+ Years work experience
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