Principal Engineer, iOS Performance

About the Role

The iOS Platform team is responsible for owning the core components of the app, including the networking and caching stack. Your expertise will help define the design patterns and technologies used across the company, ensuring that the codebase is well-structured and maintainable. As a Principal Engineer, you will have a company-wide scope, impact, and responsibility in shaping the future of iOS development at Reddit.

What You Will Do

• Own the architecture of Reddit's iOS Mobile App and make it scale to the next 100M+ DAUs
• Propose ideas and solutions to reach the vision of making Reddit's Mobile Apps best-in-class
• Identify gaps in the current iOS App Architecture and lead the redesign to improve modularity, performance, and quality
• Define, measure, and execute on key user-facing performance goals, such as minimizing App Not Responding (ANR) rate and reducing app launch time
• Improve observability and harden data quality for all key performance areas
• Drive a company-wide culture of performance, ensuring every iOS engineer has the necessary tools and skills
• Mentor iOS developers across the company
• Be the go-to person for complex problems in iOS development
• Collaborate with cross-functional teams to ensure alignment and effective implementation of iOS development strategies

What We Are Looking For

• Deep experience-based understanding of building mobile applications at scale
• Strategic thinker with a passion for developing scalable, well-designed software
• 10+ years of software development experience, with at least 5+ years in designing and developing iOS applications
• Strong understanding of iOS development principles, patterns, and best practices
• Excellent problem-solving skills and ability to debug complex issues
• Strong communication and collaboration skills, with the ability to work with cross-functional teams
• Experience with performance optimization, testing, and validation
• Knowledge of design patterns, such as MVP, MVVM, or VIPER

Nice to Have

• Experience with Swift and Objective-C
• Familiarity with iOS development frameworks and libraries
• Knowledge of continuous integration and continuous deployment (CI/CD) pipelines
• Experience with cloud-based services and infrastructure

Benefits and Perks

• Competitive salary and benefits package
• Opportunity to work on a high-impact project with a large user base
• Collaborative and dynamic work environment
• Professional development opportunities, including conferences and training
• Flexible working hours and remote work options
• Access to the latest technologies and tools
• Recognition and reward for outstanding performance
• Comprehensive health insurance and wellness programs
• Generous parental leave and family benefits
• Employee stock options and equity participation

• To stand out, make sure your portfolio showcases your experience with iOS development, including examples of performance optimization and scalability.
• Familiarize yourself with Reddit's company culture and values, and be prepared to discuss how your skills and experience align with their mission.
• Practice your problem-solving skills, as you will likely be presented with complex technical challenges during the interview process.
• Be prepared to discuss your experience with design patterns, testing, and validation, as well as your ability to collaborate with cross-functional teams.
• Consider highlighting any experience you have with cloud-based services, CI/CD pipelines, or continuous monitoring and validation.
• When negotiating salary, be sure to research the market rate for similar positions and be confident in your worth as a candidate.