WORK ENVIRONMENT & CLEARANCE DETAILS

On-Site Requirement

5 days per week at the Ashburn, VA facility. No hybrid or remote options available. Proximity to site strongly preferred.

Security Clearance Process

Must be eligible for and willing to undergo a DHS suitability investigation. Offer of employment contingent upon successful clearance adjudication. Candidates with existing active clearance will be given priority.

Senior React.js Developer to join a mission-critical engineering team supporting the Client. The successful candidate will architect, build, and optimize high-performance web applications that directly support national security operations. This is a hands-on senior IC role demanding deep mastery of modern React patterns, a security-first engineering mindset, and proven experience delivering complex front-end systems in regulated or government environments.

CORE RESPONSIBILITIES

▸ Architect and lead development of complex, large-scale React.js applications serving high-availability government workflows

– Design component libraries, micro-frontend architectures, and shared design systems

– Own performance budgets and drive continuous optimization across the full rendering lifecycle

▸ Write production-grade, rigorously tested code following federal secure development lifecycle

(SDLC) standards

– Unit, integration, and end-to-end testing with Jest, React Testing Library, and Cypress

– Enforce WCAG 2.1 AA accessibility compliance across all UI surfaces

▸ Collaborate closely with UX designers, backend engineers, and product owners in an

Agile/SAFe environment to translate requirements into exceptional user experiences

▸ Lead technical design reviews, code reviews, and architecture decisions; mentor junior and mid-level developers

▸ Integrate with RESTful APIs and GraphQL endpoints; partner with backend teams on API contract design

▸ Manage application state at enterprise scale using Redux Toolkit, Zustand, or equivalent modern state management solutions

▸ Ensure security compliance with DHS/FISMA requirements including input validation, XSS mitigation, CSP, and OWASP Top 10 hardening

▸ Participate in sprint ceremonies, contribute to estimation, and proactively surface technical risks and dependencies

▸ Support CI/CD pipeline configuration and front-end build tooling (Webpack, Vite, or equivalent)

REQUIRED QUALIFICATIONS

Experience & Education

▸ 8+ years of professional software development experience; 5+ years with React.js in production environments

▸ Bachelor''s degree in Computer Science, Software Engineering, or equivalent technical discipline (or equivalent hands-on experience)

▸ Demonstrated history delivering enterprise-scale front-end applications in federal, defense, or highly regulated industry settings

Technical Depth — React & Front-End

▸ Expert-level command of React.js including Hooks, Context API, concurrent features

(Suspense, transitions), and the virtual DOM reconciliation model

▸ Deep mastery of JavaScript (ES2022+) and TypeScript; able to define advanced generic types, mapped types, and conditional types

▸ Proficiency with modern state management: Redux / Redux Toolkit, React Query / TanStack Query, Zustand, or Recoil

▸ Experience with component-driven development using Storybook and shared design systems

Strong CSS / SCSS skills; proficiency with Tailwind CSS, CSS Modules, or styledcomponents

▸ Build tooling expertise: Webpack (custom config), Vite, Babel, and module bundler optimization (code-splitting, tree-shaking, lazy loading)

▸ Solid understanding of browser internals: event loop, rendering pipeline, Web APIs, and performance profiling via Chrome DevTools / Lighthouse.

Security & Compliance

▸ Working knowledge of FISMA, NIST 800-53, and FedRAMP control requirements as they apply to front-end development

▸ Applied experience implementing OWASP Top 10 mitigations, Content Security Policy, and secure authentication patterns (OAuth 2.0, SAML, OIDC)

▸ Understanding of Section 508 / WCAG 2.1 AA requirements and the ability to conduct accessibility audits

Tooling & Collaboration

▸ Git-based version control with a strong branching / code review discipline (GitHub, GitLab, or Bitbucket)

▸ CI/CD experience with Jenkins, GitHub Actions, GitLab CI, or Azure DevOps

▸ Agile/Scrum or SAFe methodology experience; proficiency with Jira and Confluence

▸ Clear, precise written and verbal communication; able to articulate technical concepts to nontechnical stakeholders

PREFERRED QUALIFICATIONS

▸ Active DHS, DOD, or IC security clearance

▸ Experience with Next.js or Remix for server-side rendering and edge-deployed front ends

▸ GraphQL client-side experience (Apollo Client, URQL)

▸ Familiarity with micro-frontend architecture using Module Federation

▸ Exposure to containerization (Docker) and Kubernetes for front-end deployment workflows

▸ Prior experience on DHS, CBP, CISA, TSA, or similar federal agency programs

▸ Certifications: AWS Certified Developer, Google Cloud Professional Developer, or equivalent

▸ Contributions to open-source projects or published technical writing

Cquent Systems, Inc.

Open Positions (1)

Engineering

SENIOR REACT.JS DEVELOPER