Senior Front-End Software Development Engineer

  • Vantor
  • Herndon, Virginia
  • 08/25/2026
Full time Information Technology Telecommunications Java Testing

Job Description

Vantor is seeking a Senior Front-End Software Development Engineer to design and build modern, data driven web applications for enterprise clients. You will architect front-end solutions, implement responsive UIs, and integrate with APIs using modern JavaScript frameworks. Partnering closely with back-end, data, and cloud engineers, you'll contribute to scalable, secure, and maintainable solutions. You'll lead code reviews, mentor developers, and champion front-end best practices, performance, accessibility, and testing. Working in agile teams, you'll collaborate directly with clients, own outcomes from concept to production, and continuously refine our front-end engineering standards.

Responsibilities

  • Design and implement responsive, accessible front-end interfaces for modern web applications
  • Architect front-end solutions and contribute to overall application design and standards
  • Develop high-quality, maintainable code using modern JavaScript frameworks and tools
  • Integrate front-end components with RESTful and Graph
  • QL APIs and back-end services
  • Optimize applications for performance, scalability, and cross-browser compatibility
  • Write and maintain unit, integration, and end-to-end tests for front-end code
  • Lead code reviews, provide technical guidance, and mentor junior developers
  • Collaborate with cross-functional agile teams and engage directly with clients to refine requirements
  • Contribute to design systems, reusable component libraries, and front-end tooling
  • Champion front-end best practices, security, and continuous improvement across the team

Required Skills

  • JavaScript (ES6+)
  • Type
  • Script
  • React or similar modern front-end framework
  • HTML5 and CSS3
  • Responsive and mobile-first design
  • RESTful and Graph
  • QL API integration
  • Front-end testing (Jest, Cypress, or similar)
  • Version control with Git
  • Performance optimization and web accessibility
  • Agile/Scrum development practices