BI Application Engineer

Apple is where individual creativities gather together, contributing to the values that lead to phenomenal work. Every new product we build, service we create, or Apple Store experience we deliver is the result of us making each other's ideas stronger. That happens because every one of us shares a belief that we can make something wonderful and share it with the world, changing lives for the better. It's the diversity of our people and their thinking that inspires the innovation that runs through everything we do. When we bring everybody in, we can do the best work of our lives. Here, you'll do more than join something — you'll add something.

Apple Pay brought mobile payment to millions of customers, and it's just the beginning. We are looking for engineers who enjoy both hands-on technical work and crafting thoughtful, scalable services for Wallet and Apple Pay. Our vision is to be the engine of intelligent transformation, demonstrating a unified, reliable data platform to build and deploy innovative and solutions that drive significant business impact and enable data-driven decision-making throughout the organization.

Description
As a BI Application Engineer, you will work with massive internet-scale data across numerous product and customer touch-points, undertaking in-depth quantitative analysis, and distilling data into actionable and intuitive visualizations to drive informed decision-making. This role involves communicating and collaborating across many different teams, as an agile approach to solving exciting problems quickly, and stresses the details. In this role, you will design and build self-service tools, interface to interact with AI agents, applications that present insights associated with customer experience, product performance, business operations, and strategic decision-making. Often you will collaborate with various data analysts, frontend and backend engineering teams to build world-class tools along with prototype applications to help our collaborators visualize data and insights.

Minimum Qualifications
3+ years of professional web applications development experience

Expert JavaScript/TypeScript and React (or comparable modern framework); strong command of component patterns, hooks, context, and state management (e.g., Redux, Zustand)

Testing discipline: unit/integration/E2E (Jest, React Testing Library, Playwright/Cypress) and confidence adding tests to legacy code

Styling systems: CSS architecture (CSS Modules/Tailwind/CSS-in-JS), responsive layouts, theming, and cross-browser compatibility

Tooling & delivery: modern build tools (Vite/Webpack/Rollup), linting/formatting (ESLint/Prettier), package hygiene, and CI for front-end pipelines

API integration: REST/GraphQL, authentication flows, resilient data fetching/caching (SWR/React Query), error handling and retries

Performance excellence: hands-on experience meeting Core Web Vitals; profiling and fixing bundle bloat via tree-shaking, code-splitting, caching, and memoization

Preferred Qualifications
Bachelor's or Master's degree in Computer Science or a related technical field or equivalent experience

Excellent verbal and written communication skills

Self-starter with forward thinking capability with strong executional track record and be accountable for business priorities

Experience with TypeScript for enhanced code reliability in large-scale applications.

Familiarity with build tools such as Webpack, Babel, and Vite.

Strong proficiency with UI performance optimization techniques.

Background in micro-frontend architectures or modular front-end design patterns.

Familiarity with backend technologies (e.g., , RESTful APIs) to facilitate seamless front-end and back-end collaboration.

Experience developing and contributing to design systems or reusable component libraries.

Quality & observability: feature flags, analytics, and client-side monitoring (e.g., Sentry) to ensure reliability in production

Front-end architecture leadership: design/evolve modular UI architectures, data-flow boundaries, and code-splitting strategies with minimal supervision

Experience implementing secure client-side auth in production—OAuth 2.0/OIDC with PKCE, SSO integrations, safe token/refresh handling, session management, CSRF/CORS/sameSite, and permission-aware UI (RBAC/ABAC) without exposing sensitive details

Familiar with in Git and CI/CD tools.

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