CareerDev4AI

Frontend Engineer

Builds responsive, high-performance, accessible user interfaces using modern web technologies like React, TypeScript, and state management architectures.

Technology & Software Mid level $85,000 - $135,000 / year

What the role involves

  • Architect, develop, and maintain responsive web applications
  • Translate design wireframes and UX flows into clean, modular components
  • Optimize application performance, core web vitals, and network latency
  • Implement robust automated tests (unit, integration, and e2e)
  • Collaborate with product designers, backend engineers, and product managers

Core skills

  • React (level 4/5)
  • TypeScript (level 4/5)
  • JavaScript (ES6+) (level 4/5)
  • HTML5 & Modern CSS (level 4/5)
  • State Management (level 3/5)
  • Web Performance Optimization (level 3/5)
  • Git & Version Control (level 4/5)
  • REST & GraphQL APIs (level 3/5)

Preferred skills

  • Next.js
  • Tailwind CSS
  • Testing (Jest/Playwright)
  • CI/CD Pipelines
  • Accessibility (a11y)

Tools

ReactTypeScriptViteNext.jsTailwind CSSFigmaGitChrome DevToolsJestPlaywright

Experience expected

2-4 years of professional web development experience or equivalent demonstrable production projects

Projects that prove the role

  • Design System component library with automated visual regression tests
  • Real-time collaborative dashboard with WebSockets and responsive tables
  • High-conversion e-commerce checkout flow with sub-second performance

Evidence to collect

  • A deployed web application you can link to
  • A GitHub repository with a clear README and commit history
  • Before/after Lighthouse or Core Web Vitals measurements

What the interview covers

  • Virtual DOM and React reconciliation lifecycle
  • JavaScript event loop, closures, and asynchronous concurrency
  • Browser rendering path and Core Web Vitals optimization
  • Component state architecture and performance memoization
  • STAR behavioral stories on resolving cross-functional trade-offs

How the role progresses

  • Junior Frontend Developer
  • Mid Frontend Engineer
  • Senior Frontend Engineer
  • Lead UI Architect
  • Staff Engineer / Engineering Manager

Certifications that carry weight

  • Meta Front-End Developer Professional Certificate
  • AWS Certified Cloud Practitioner

Related roles

  • fullstack-engineer
  • mobile-engineer
  • ui-ux-designer

Turn this into a plan

Inside CareerDev4AI, choosing this role generates a roadmap of the skills, projects and milestones that move you towards it.

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