Staff iOS Engineer, Media Foundation

About the Role

The Media Foundation’s mission is simple: Delivering seamless, high-performance media experiences that meet and exceed industry standards, ensuring unparalleled engagement across all platforms at Reddit. Media is the most engaging medium on Reddit, whether it’s for posts, comments, or ads. This is a pivotal role within the Media Foundation team, essential to shaping Reddit's media experience across all devices.

This is a high-impact role where you will drive related technical & product strategy, operations, architecture, and execution for one of the largest sites in the world.

What You Will Do

• Architect a highly modular, easy-to-integrate iOS video player that enables other teams to build features effortlessly while delivering first-class performance for users.
• Partner with backend media infrastructure and CDN teams to optimize global delivery and performance.
• Work cross-functionally with product, design, and other engineering counterparts to execute on product and business strategy and build novel media products and features that our users will love.
• Work with a team of thoughtful, fast-moving, and motivated engineers. Set and define standards that improve developer workflows, recommend best practices, and help coach and mentor engineers on the team to further their professional development.
• Utilize AI-assisted development tools to accelerate prototyping, system design, and coding, while applying rigorous judgement to validate and own the final outputs.

Qualifications

• At least 8+ years of experience as a software engineer developing user-facing iOS mobile native applications at scale, using Swift.
• In-depth knowledge of AVFoundation for video and audio playback, asset management, streaming, editing, and exporting capabilities.
• Strong understanding of Core Media for timing and synchronization and Core Video for buffer handling, essential for custom playback and real-time video manipulation.
• Familiarity with HTTP Live Streaming (HLS), MPEG-DASH, MP4, and other streaming protocols, as well as working knowledge of streaming frameworks and CDN integration for optimized video delivery.
• Familiarity with reactive frameworks (RxSwift, Combine).
• Strong organizational skills, the ability to prioritize tasks and to deliver projects on schedule.
• BS degree in Computer Science, a similar technical field of study or equivalent practical experience.
• Entrepreneurial spirit: self-directed, innovative, and biased towards action in fast-paced environments.
• Excellent communication skills, collaborating effectively in a fully remote environment.

Interview Process Notice

In select roles and locations, interviews may be recorded, transcribed, and summarized by AI, with the opportunity to opt out prior to scheduled interviews.