Staff AI Architect

Role Description

Your role is owning how Life360's deterministic backend (location data, the family graph, behavioral signals, user insights) pairs with the probabilistic world of LLMs. You decide how those two sides talk to each other, and you make sure the seams don't show.

• Own the inference pipeline end to end: model selection, serving infrastructure, evaluation loops, prompt and context strategy, and the cloud services that keep it all running in production.
• Make tradeoffs between latency, cost, and quality.
• Build the eval harness that tells us whether the system is actually getting better, not just feeling different.
• Ensure the product feels seamless to users, the data stays safe, and inference costs don't run away.
• Act as a cloud engineer who is deeply fluent in how AI systems work in production.

Qualifications

• Deep engineering experience, with significant time spent building and running AI systems in production at meaningful scale.
• Fluent in modern LLM serving (vLLM, TGI, SGLang, hosted APIs).
• Experience in building eval harnesses to differentiate between vibes-based iteration and real progress.
• Ability to build a cloud system from the ground up.
• Strong opinions about cost management in AI systems.
• Hands-on experience with AI tools and workflows.
• Strong written communication skills.
• Experience with agent systems, retrieval pipelines, or long-context personalization.
• Privacy architecture experience in multi-user systems.
• Experience building data-driven products.

Requirements

• Self-starter energy; ability to operate without a spec.
• Ability to ship products daily, focusing on momentum over polish.
• Willingness to push for excellence and hold strong opinions.
• Comfortable making decisions with incomplete information.
• Customer-centric mindset; familiarity with the product.

Benefits

• Competitive pay and benefits.
• Medical, dental, vision, life, and disability insurance plans (100% paid for US employees).
• 401(k) plan with company matching program in the US and RRSP with DPSP plan for Canadian employees.
• Employee Assistance Program (EAP) for mental wellness.
• Flexible PTO and 12 company-wide days off throughout the year.
• Learning & Development programs.
• Equipment, tools, and reimbursement support for a productive remote environment.
• Free Life360 Platinum Membership for your preferred circle.