Senior iOS Engineer

Who you are

• 3+ years of production iOS development in Swift and/or Objective-C. We care more about the depth of what you’ve owned than the exact number of years
• You’ve owned a meaningful module end to end — design, implementation, launch, and the aftermath
• Experience with ad rendering standards such as MRAID or OMID — or comparable experience rendering third-party content inside a native app
• Strong debugging instincts. You can work backward from a crash stack and sparse logs to a root cause without a reliable local repro, and you’re comfortable investigating systems you don’t have the source for
• Judgment about AI tools. You use AI coding assistants as part of your normal workflow, and you can articulate where they help you and where you override them
• Comfort with numbers. You’ve shipped behind experiments before and can reason about a metric moving without needing someone to interpret it for you
• Ownership. On a team this size, work isn’t handed to you pre-scoped — you spot problems, define them, and drive them to done. And you treat “it shipped” as the start of your responsibility, not the end
• Clear communicator who’s comfortable working directly with product, QA, and other non-engineers
• Mediation or in-app bidding experience
• SDK development experience — public API design, backward compatibility, dependency discipline
• Background in feed, video, or other latency-sensitive surfaces
• Familiarity with mobile privacy and consent frameworks

What the job involves

• Our team owns NewsBreak’s first-party monetization stack end to end — from the client, through the auction server, to our in-house ad platform. It’s a small team with wide surface area, which means two things: the distance between the code you write and the revenue it drives is very short, and you’ll own your area outright rather than picking up tickets from a queue
• You’ll be the person responsible for how ads load, render, and behave on iOS — in our own app, in the SDK we ship to third-party publishers, and across the external ad networks we mediate
• Build and maintain iOS ad functionality across our app and our publisher-facing SDK
• Own ad rendering and the ad experience: how creatives load, display, and perform, for both rich-media and native formats
• Own viewability and event accuracy — impressions, clicks, and billing signals have to be right, and they have to reconcile with what our partners measure
• Own the client-side mediation layer: how we request, prioritize, cache, and fall back across demand sources
• Integrate and maintain external ad SDKs (Google, Meta, and others) through version upgrades and platform changes, and own the tradeoffs when their behavior conflicts with ours
• Own production health for the iOS ad stack — you’re the person who responds when something breaks, including problems originating inside vendor SDKs you can’t see into. Ad code ships in our app and in our publishers’ apps, so a rendering bug is an app stability problem, not just a bad ad
• Measure your own work — ship behind experiments and be able to show that an experience change didn’t cost revenue

Benefits

• Work from home opportunities
• Health, dental, and vision care for you and your family
• Top-tier 401(K) plan with company matching
• Paid time off and paid holidays
• Paid parental leave
• FSA and commuter benefit programs
• Team activity budget