Senior Frontend Engineer, Annotation Tools

We’re seeking a detail-oriented Senior Frontend Engineer to build world-class annotation tools using React and TypeScript. You’ll create responsive, high-quality web interfaces that enable global annotators to work efficiently, while integrating AI capabilities to enhance productivity. This role is ideal for someone who values frontend craftsmanship, collaborates effectively with stakeholders, and delivers exceptional customer-facing applications.

As a Senior Web Frontend Engineer, you’ll design and develop sophisticated React based annotation tools that combine polished user experiences with intelligent AI integration. You’ll collaborate directly with product managers, designers, and end-users to understand workflows, translate requirements into elegant applications, and continuously improve tools that support annotators worldwide.

• We’re looking for someone who brings both precision and creativity: the ability to implement pixel-accurate designs, and the judgment to make user-centered UI/UX decisions when designs are incomplete. You’ll build scalable, maintainable codebases and play a key role in shaping the next generation of human-AI collaboration.

• Extensive experience (5+ years) building and scaling production web applications in React and TypeScript, including component architecture, state management, and performance optimization.
• Proficiency with modern frontend build tools and styling frameworks (e.g., Vite, Webpack, Tailwind CSS, CSS Modules) and strong grasp of modern JavaScript/CSS practices.
• Ability to translate design specifications into pixel-accurate UI implementations, and to make thoughtful, user-centered UI/UX decisions when specifications are incomplete — balancing usability, accessibility, and consistency with the product’s design system.
• Proven experience working directly with product managers, designers, or end-users to gather requirements and iteratively deliver production-ready customer-facing applications.

• Experience building annotation, labeling, or complex data visualization tools, or other workflow-driven web applications.
• Experience integrating AI/ML models into web applications through APIs and SDKs
• Performance optimization expertise in data-heavy, real-time, or media-rich web applications (e.g., optimizing rendering, state management, or network performance).
• Experience developing or contributing to design systems and reusable component libraries that ensure consistency and scalability across applications.
• Proficiency using AI-assisted development tools (e.g., claude code, vs code extensions, cursor, windsurf etc) to accelerate coding tasks, while maintaining code quality and review standards.

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $181,100 and $318,400, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits.

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant

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