Software Engineer Search & Indexing Platform, Apple Ads

Job Summary

Apple Ads helps developers and businesses reach customers on the App Store through highly relevant, privacy-focused advertising. Our engineering teams build the infrastructure that powers ad delivery at Apple scale from search and retrieval to auction, ranking, and measurement.

Role Overview

We are looking for a Software Engineer to join the team responsible for Apple Ads core search and indexing platform - the system that retrieves the most relevant ad candidates in response to real-time search queries across our ad placements. This platform operates at massive scale, handling tens of thousands of requests per second with strict latency requirements, and indexes millions of advertiser campaigns with complex targeting signals. We are investing heavily in evolving this platform: transitioning from batch-based architectures to streaming-first, near-real-time indexing, building modular retrieval infrastructure that scales efficiently across multiple ad placements, and introducing on-device ML scoring at retrieval time. You will have the opportunity to work across the full search stack from index construction pipelines and data ingestion, to query execution, candidate ranking, and production reliability.

Responsibilities

• Design, build, and maintain large-scale distributed search and indexing systems that power real-time ad retrieval
• Develop streaming index pipelines that reflect advertiser campaign changes in near-real-time, replacing legacy batch-only workflows
• Build and optimize retrieval components including inverted indexes, approximate nearest neighbor (ANN/EBR) indexes, query tree generation, and candidate ranking at the leaf level
• Implement ad eligibility and filtering logic at retrieval time including keyword matching, audience targeting, budget enforcement, frequency capping, and policy compliance
• Drive platform generalization abstracting core retrieval capabilities (matching, eligibility, scoring, ranking) into a shared base stack that new ad placements can build on without rebuilding from scratch
• Build auto-scaling infrastructure to eliminate manual capacity operations and support organic demand growth
• Develop observability and debugging tooling to give engineers real-time visibility into index state, query behavior, and candidate retrieval outcomes
• Contribute to offline experimentation infrastructure that allows ML teams to evaluate new ranking and matching models without risk to production traffic
• Participate in on-call rotations and lead incident response for production search and indexing systems

Disclaimer: This job description has been sourced from a public domain and may have been modified by Naukri.com to improve clarity for our users. We encourage job seekers to verify all details directly with the employer via their official channels before applying.