Senior Software Engineer II, Mobile - On App Ads (AI Native)

About Life360

Life360’s mission is to keep people close to the ones they love. Our category-leading mobile app, Tile tracking devices, and Pet GPS tracker empower members to protect the people, pets, and things they care about most with a range of services, including location sharing, safe driver reports, and crash detection with emergency dispatch. Life360 serves approximately 102.4 million monthly active users (MAU) across more than 180 countries.

Life360 has more than 500 remote-first employees. All positions can be performed remotely (within the US and Canada).

We are AI Native

We are building an AI native company where AI is an integral part of how we build and operate. AI tool usage during interviews varies by role. You may be asked to demonstrate proficiency with AI tools, discuss how you leverage AI, or complete interview exercises without AI assistance.

About The Team

The On App Ads Engineering team owns the ads layer inside the Life360 app, reaching approximately 102.4 million monthly active users. We build and maintain the SDK, header-bidding and mediation integrations, ad quality, and consent behind every ad on iOS and Android, serving 300M+ ad requests a day. We also own testing and monitoring that keep the stack reliable, ensuring every impression is competitively priced, respects privacy choices, and renders safely.

About the Job

Life360 is hiring a Senior Software Engineer II for Mobile, On App Ads, to join our AI Native engineering team. You'll be central to how the Ads Engineering team builds, scales, and evolves monetization in the Life360 app, and to how we use AI for development going forward.

This role is iOS-first. Most of your work will be in Swift on the iOS app and SDK. Our AI-Native way of working also rewards engineers who treat platform boundaries as fluid, so you should be willing to build on Android, ad-server config, or backend when required.

What You’ll Do

• Design, build, and maintain the iOS ads layer: our in-house ads SDK, demand partner and header-bidding integrations (e.g., Prebid, Google Mobile Ads/GAM), and mediation.
• Introduce new ad formats, placements, and capabilities that grow revenue while protecting startup time, scroll performance, and the member experience.
• Own privacy and consent on iOS: ATT, IDFA handling, SKAdNetwork/AdAttributionKit, and consent frameworks (TCF/GPP).
• Protect ad quality by detecting/blocking bad creatives, diagnosing rendering and fill issues, and partnering with ad ops.
• Instrument ad events (requests, impressions, clicks, revenue signals) accurately for revenue and A/B test analysis.
• Run A/B tests on ads configuration (floors, refresh, placements, partner mix) and turn results into decisions.
• Work with AI (Claude Code) as a first-class collaborator to orchestrate agents for specs, Swift code generation, tests, and code reviews.
• Partner closely with product, ad operations, data science, and third-party SDK vendors.
• Contribute to architectural decisions, code reviews, and a culture of continuous improvement on the iOS codebase.
• Take part in the on-call rotation and incident response for ads and mobile releases.
• Mentor teammates and help set technical standards for the team.

What We’re Looking For

Technical Foundation

• 6+ years of iOS engineering experience shipping production apps at consumer scale.
• At least 1 year of hands-on experience prompting, evaluating, and building with LLMs.
• Strong proficiency in Swift, SwiftUI, and UIKit, plus deep familiarity with the modern iOS toolchain (Xcode, Swift Concurrency, Combine).
• Experience with iOS architecture patterns (MVVM, coordinators, dependency injection, modularization) in a large, multi-team codebase.
• Experience integrating and debugging third-party SDKs in production.
• Solid grounding in iOS performance, memory, and crash diagnostics (Instruments, MetricKit, Crashlytics).
• Experience with CI/CD for iOS (Fastlane, Xcode Cloud, Buildkite, GitHub Actions).
• Hands-on experience with agentic workflows, prompt engineering, context-window management, and MCP/function calling.
• Bachelor's degree in a technical field, or equivalent experience.

Nice-to-Have

• Hands-on ad tech experience: OpenRTB, Prebid Mobile, Google Mobile Ads/GAM, AdMob, or mediation platforms.
• Experience with iOS privacy and attribution: ATT, SKAdNetwork/AdAttributionKit, Privacy Manifests, and consent management platforms.
• Experience building or maintaining an SDK or framework consumed by other teams.
• Familiarity with ad quality tooling, creative rendering (WKWebView, MRAID), and diagnosing fill or latency issues.
• Experience with an experimentation platform (Statsig, LaunchDarkly, Optimizely).
• Android/Kotlin experience, or a willingness to contribute cross-platform.

Our Benefits

• Medical, dental, vision, life and disability insurance plans (100% paid for US employees; supplemental plans for Canadian employees).
• 401(k) plan with company matching in the US and RRSP with DPSP plan for Canadian employees.
• Paid parental leave.
• Mental Wellness Program & Employee Assistance Program (EAP).
• Flexible PTO, companywide holidays, plus summer and winter shutdowns.
• Learning & Development programs.
• Remote work equipment, tools, and reimbursement support.
• Free Life360 Platinum Membership and Tile trackers.