Senior Software Engineer II, (AI Native)

About this role

<h3>About Life360</h3> <p>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), as of June 30, 2026, across more than 180 countries.&nbsp;&nbsp;</p> <p>Life360 delivers peace of mind and enhances everyday family life with seamless coordination for all the moments that matter, big and small. By continuing to innovate and deliver for our customers, we have become a household name and the must-have mobile-based membership for families (and those friends who are basically family).</p> <p>Life360 has more than 500 (and growing!) remote-first employees. For more information, please visit <a href="http://life360.com/">life360.com</a>.</p> <p><strong><em>Life360 is a Remote First company, which means a remote work environment will be the primary experience for all employees. All positions, unless otherwise specified, can be performed remotely (within the US and Canada) regardless of any specified location above.&nbsp;</em></strong></p> <h4>We are AI Native</h4> <p>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. Your Recruiter will provide clear guidance as you move through the interview process.</p> <p>Undisclosed use of AI not previously discussed with or approved by your Recruiter may impact your candidacy.</p> <h3>About The Team</h3> <p>Join us as we build the next evolution of our backend services to support Life360’s continued global growth. As part of the Ads team, you will help scale and modernize our AdServer and Exchange platform — a high-availability, low-latency distributed system processing billions of requests and events per day.</p> <p>We are evolving our backend architecture to power monetization across our ecosystem at massive scale. You will partner closely with Architecture and Product teams to expand our advertising capabilities, integrate new demand and supply partners, and support 20+ billion daily events.</p> <p>Our team leverages AI technologies to enhance functionality and efficiency, enabling us to develop smarter solutions that significantly improve user experiences. Your contributions will be instrumental in supporting Life360’s growth and innovation in the ever-evolving landscape of digital services. Together, we are building systems that are resilient under heavy load, horizontally scalable, and flexible enough to meet rapidly evolving product demands.</p> <p>At Life360, our teams are motivated by <strong>impact</strong>, thrive when empowered with high <strong>agency</strong>, are always <strong>curious</strong>, and build with <strong>engineering excellence</strong> as a first principle.</p> <h3>About the Job</h3> <p>As a Senior Software Engineer II on our Ads team, you will own the end-to-end development of key projects within our ad server and real-time bidding (RTB) solutions. This includes defining project scope, designing architecture, implementing features, and ensuring high-quality deliverables. You will play a pivotal role in shaping our technological direction and driving innovations that enhance our offerings in the digital advertising landscape, particularly through AI-native development.</p> <p>&nbsp;</p> <p>In this role, you will leverage AI technologies to improve targeting, optimize bidding strategies, and enhance user experiences. Your expertise in AI will be essential in navigating the evolving landscape of digital advertising, empowering us to effectively meet the growing demands of the market.</p> <p>&nbsp;</p> <p>The evolution of digital advertising necessitates the enhancement of our solutions, and your contributions will be vital in integrating AI-driven functionalities into our products. By taking on this position, you will have the opportunity to shape the future of our offerings while collaborating with senior engineers and mentoring junior team members. Your work will directly influence our ability to remain competitive and responsive to market trends, making this an exciting time to join our team.</p> <p>For candidates based in the US, the salary range for this position is $118,500 to $216,500 USD. For candidates based out of Canada, the salary range for this position is $171,500 CAD to $201,000 CAD. <strong>Note: Please be aware that the job title for positions in Canada will be "Developer" in lieu of "Engineer." </strong>We take into consideration an individual's background and experience in determining final salary - therefore, base pay offered may vary considerably depending on geographic location, job-related knowledge, skills, and experience. The compensation package includes a wide range of medical, dental, vision, financial, and other benefits, as well as equity.</p> <h3>What You’ll Do</h3> <ul> <li>Build and maintain high-throughput backend services on the AdServer and Exchange platform, contributing to reliability, scalability, and performance targets.</li> <li>Implement and improve Real-Time Bidding and auction logic, and support integrations with demand and supply partners.</li> <li>Collaborate with Staff Engineers and architects to execute on platform design decisions and raise concerns where you see gaps.</li> <li>Own features end-to-end — from design through deployment — with a focus on correctness, observability, and operational health.</li> <li>Partner with Product on new ad formats and monetization capabilities, translating requirements into solid technical designs.</li> <li>Contribute to monitoring, incident response, and root cause analy