Senior UI/UX Web Developer

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. As a UI/UX Web Developer, you will be responsible for designing and building user-focused websites and web applications that seamlessly blend visual appeal with robust functionality. Your day-to-day work will involve conducting in-depth user research, developing wireframes, user flows and interactive prototypes, and translating these designs into clean, production-ready front-end code. You will be expected to ensure that every digital experience you create is accessible, responsive, and optimized for performance across all devices. Collaborating closely with product managers, backend engineers and marketing teams, you will help align your designs with broader business objectives and user needs. To excel in this role, you should be proficient with industry-standard design tools such as Figma, Sketch, Adobe XD or the Adobe Creative Suite, and possess a strong command of HTML5, CSS3 and JavaScript. Experience working with modern JavaScript frameworks like React, Vue.js or Angular will be essential, as will familiarity with version control systems such as Git. A deep understanding of user-centered design principles, strong critical thinking skills and a passion for solving complex usability challenges are also important. Your ability to conduct usability testing, define user personas and ensure compliance with accessibility standards (WCADA / WCAG) will be key to delivering high-quality, inclusive digital products. 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 (WCADA/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 Strong command of HTML5, CSS3, Java and JavaScript Experience with modern JavaScript frameworks such as React, Vue.js or Angular Familiarity with Git or other version control systems, ideally GitLab 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. #J-18808-Ljbffr