Technical Lead, Applications

ABOUT A1 There are over 5 billion users using basic applications today such email, notes, tasks that are not AI-native. Our mission is to build a proactive smart assistant for everyday users to bring intelligence to conversations, errands, organising and workflows, with minimal prompting. Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. The system must handle multi-step reasoning, interact with external tools, and remain reliable despite non-deterministic model behavior. Our objective is to help users complete tasks daily enjoyable with over ~90%* reduced time. ROLE As Technical Lead, Applications, you directly own the core application architecture that connects AI systems to real-world user experiences. You are responsible for the design, reliability, and evolution of backend services, APIs, and client integrations across mobile and desktop. This is a hands-on leadership role. You stay close to the code, make critical architectural decisions, and ensure the system remains fast, reliable, and coherent as it scales. FOCUS - Own the application engineering strategy and execution across backend, mobile, and desktop. - Lead and grow a small, senior applications team, including backend, mobile, and desktop engineers. - Ensure production-grade reliability: observability, monitoring, retries, fallbacks, and failure handling. - Set the architectural direction for AI-powered product workflows, APIs, and client integrations. - Ensure AI capabilities are integrated into the product with clear abstractions, predictable behavior, and graceful failure modes. - Partner closely with Machine Learning leadership to translate model capability into shippable product features. - Make high-impact decisions across latency, cost, reliability, security, and user experience. - Establish a strong execution culture through code reviews, design reviews, and hands-on technical leadership. - Ensure production readine