Principal Engineer, iOS Performance

Responsibilities

• Own the architecture of Reddit’s iOS Mobile App to scale for 100M+ DAUs
• Lead redesign of the iOS platform to improve modularity, performance, and quality
• Define and execute key user-facing performance goals including ANR rate, launch time, and frame rates
• Improve observability and telemetry for key performance areas
• Drive a company-wide culture of performance and mentor iOS developers
• Act as the primary architect and technical expert for complex iOS development challenges

Requirements

• 10+ years of software development experience
• 5+ years of experience designing and developing iOS applications
• Experience influencing large organizations (200+ engineers) on technical direction
• Proficiency with modern iOS frameworks like SwiftUI and structured Concurrency
• Deep understanding of building mobile applications at scale
• Bachelor's degree in Computer Science or a related field, or equivalent technical expertise

Preferred Qualifications

• Experience working with cross-functional teams including design, product, and data
• Strategic thinking regarding long-term technical foundations

Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs including professional development and caregiving support
• Family Planning Support and Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Paid Volunteer Time Off
• Generous Paid Parental Leave