Principal Front End Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Front End Engineer based in the United States. This is a senior technical leadership opportunity for an engineer who wants to shape frontend engineering practices at an organizational level. You will define modern frontend architecture, tooling, standards, and development practices across multiple teams and applications. The role combines hands-on engineering with technical strategy, mentoring, and cross-functional influence. You will build accessible, high-performance, user-centered web applications serving government customers and mission-critical users. A major focus will be on design systems, frontend infrastructure, automated testing, accessibility, performance, and developer experience. You will partner closely with product, design, backend, and engineering leaders to turn complex requirements into practical, scalable solutions. This is a fully remote role offering the opportunity to make a broad technical impact while working on meaningful public-sector technology initiatives. Define and drive the strategic direction for frontend engineering practices, architecture, tooling, standards, and technical capabilities across the organization. Lead the architecture and development of scalable, accessible, performant, and user-focused web applications, with a strong emphasis on Section 508 and WCAG compliance. Design and implement modern frontend architectures, build systems, development workflows, CI/CD pipelines, and deployment infrastructure. Establish and maintain shared component libraries, design systems, and reusable frontend infrastructure that improve consistency, quality, and engineering velocity. Champion engineering excellence through best practices for mobile-first development, testing, performance optimization, accessibility, code quality, and maintainability. Modernize frontend technology stacks and lead technical initiatives that improve application quality, developer experience, reliability, and delivery efficiency. Establish robust automated testing strategies spanning unit, component, and end-to-end testing, including accessibility validation within CI/CD pipelines. Partner with product managers and designers to balance user needs, business objectives, technical constraints, and implementation effort when shaping solutions. Provide technical leadership across teams, influence architectural decisions, and serve as a strategic advisor for frontend initiatives with organization-wide impact. Mentor and coach engineers at different levels, helping develop frontend expertise, engineering standards, and career growth pathways. Contribute across the full stack when necessary to solve complex problems, while maintaining frontend engineering as the primary area of expertise. Communicate technical strategy, architectural decisions, risks, and recommendations clearly to engineers, product leaders, designers, executives, and other stakeholders. Requirements: 10+ years of related software engineering experience, with a demonstrated record of delivering production-grade frontend applications and leading significant technical initiatives. Proven expertise architecting and implementing modern web applications at scale using React and/or Angular . Strong proficiency in modern JavaScript/TypeScript and a deep understanding of web platform APIs, CSS architecture, responsive design, and cross-browser compatibility. Strong practical experience with frontend build and deployment tooling such as Webpack, Vite, pnpm, npm , or comparable technologies. Hands-on knowledge of automated testing, including unit testing with tools such as Jest or Vitest, component testing with React Testing Library or Angular Testing Library, and end-to-end testing with Playwright, Cypress, or similar platforms. Strong understanding and practical implementation experience with WCAG 2.1 AA, Section 508 , accessibility li