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Apple·Software Engineer·Onsite - System Design / Architecture·Senior

Senior
Jun 2026

Summary

Apple system design round for a software engineering role. One question, pretty open-ended, and I spent the first few minutes just trying to figure out what they actually wanted me to focus on.

Questions Asked (1)

Q1

Design an Applicant Tracking System (ATS).

System DesignData ModelingAPI & Integrations
Author's notes

I jumped straight into the data model which was probably the wrong call.

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AI HintsAI Generated

Suggested Approach

Start by clarifying requirements and scale, then design the core data model for candidates, jobs, and applications, followed by API design and integration points. Focus on scalability, data consistency, and extensibility for future needs like analytics and AI features.

Pro tip: Emphasize the importance of a flexible data model to handle custom workflows and fields, as different companies have unique hiring processes. Also, discuss how to ensure data privacy and compliance (e.g., GDPR) from the start.

1. Clarify Requirements

Ask about scale (number of users, jobs, applications), key features (job posting, candidate tracking, interview scheduling, reporting), and non-functional requirements (availability, latency, consistency).

2. Design Data Model

Define core entities: Candidate, Job, Application, Interview, User (recruiter/hiring manager), and their relationships. Consider using a relational database for strong consistency, but be open to NoSQL for scalability if needed.

3. Design APIs and Integrations

Outline RESTful APIs for CRUD operations on entities, plus endpoints for search, filtering, and reporting. Discuss integration with external systems like job boards, calendar services, and email.

4. Address Scalability and Performance

Discuss partitioning strategies (e.g., by company or job), caching, read replicas, and asynchronous processing for tasks like resume parsing and email notifications.

5. Cover Security and Compliance

Mention authentication/authorization (OAuth, RBAC), data encryption, audit logs, and compliance with regulations like GDPR and CCPA.

Key Points to Mention

  • Entity relationships and normalization vs. denormalization trade-offs
  • API design principles: REST, versioning, pagination, rate limiting
  • Integration patterns: webhooks, polling, third-party APIs (e.g., LinkedIn, Google Calendar)
  • Scalability techniques: sharding, caching, message queues
  • Security: RBAC, encryption at rest and in transit, audit trails
  • Compliance: GDPR, data retention policies, right to be forgotten

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.