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Front-End Engineer

Oasys International, LLC
United States, Virginia, Fairfax
Mar 19, 2026

Who We Are: Oasys International LLC (Oasys) is a fast-growing federal government contractor delivering high-quality technology consulting and professional services to civilian, defense, and homeland security agencies. We have been recognized on Inc. 5000's list of the fastest-growing companies in America for five consecutive years and named a Best Places to Work in Virginia for the past two years.

Our success is driven by a talented team of technologists, consultants, engineers, and subject-matter experts who support complex federal missions with integrity and excellence. At Oasys, we foster a collaborative, merit-based culture that values continuous learning, professional growth, and work-life balance. We are committed to creating an inclusive, engaging environment where employees are recognized for their contributions and empowered to build meaningful, long-term careers.

Position Summary:

The Front-End Engineer is responsible for leading the design, development, and maintenance of intuitive, scalable, and responsive web applications using modern front-end technologies. Will work closely with designers, back-end developers, and stakeholders to deliver high-quality web applications that provide an exceptional user experience. Works in an agile process and produces iterative products for review and refinement. Responsible for delivering web designs that are 508 accessible and compliant with DoD regulations.

NOTE: This role is contingent on the contract being awarded.

Primary Responsibilities:

  • Develop and maintain scalable, efficient, and responsive web applications using modern front-end technologies.
  • Integrate front-end components with back-end services and APIs.
  • Optimize applications for maximum speed and scalability.
  • Ensure cross-browser compatibility and adherence to accessibility standards.
  • Collaborate with UX/UI designers to translate wireframes and prototypes into functional code.
  • Participate in code reviews and contribute to best practices for front-end development.
  • Partner with designers and developers to ensure the interface meets usability standards and aligns with business goals.
  • Communicate effectively with back-end developers about feasibility, constraints, and technical considerations.
  • Support testing and validate that the front-end meets requirements and provides seamless user experience.
  • All other duties as assigned by management.

Skills and Qualifications:

  • Bachelor's degree in computer science or a technical field
  • 10+ years developing applications with proven leadership in legacy software rebuilds
  • Microsoft Full-Stack Development building web applications using MEAN stack (MongoDB, Express.js, Angular, Node.js)
  • Front and back-end development knowledge in JAVA, HTML, CSS, Javascript, and framework libraries expertise
  • Strong understanding of responsive design and cross-browser compatibility
  • Knowledge of UI/UX principles and section 508 accessibility standards
  • Proficiency in requirements documentation, process modeling, and tools like Jira, Confluence, Figma.
  • Excellent communication and management skills.

Certifications Preferred:

  • Certified Professional in Full Stack Development (CP-FSD)
  • AWS Solutions Architect certification
  • PMP Certification

Security Clearance Requirements:

  • Must be a U.S. Citizen
  • Must have an active DoD Secret clearance.

Work Location:

  • Fairfax, VA - Corporate Headquarters (Hybrid)

Oasys is proud to be an equal opportunity employer for all protected groups, including protected veterans and individuals with disabilities.

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