Full Stack Engineer, AI systems

A1 is building a proactive smart assistant for everyday users to bring intelligence to conversations, errands, organizing, and workflows with minimal prompting. The product focuses on high reliability for long-running workflows, persistent context, and real-world task completion, handling multi-step reasoning and external tool interaction despite non-deterministic model behavior, aiming to reduce users' task completion time by over ~90%.

• Strong experience in full stack engineering (frontend + backend)
• Solid understanding of system design and API architecture
• Experience working with LLMs, RAG systems, or AI-powered applications
• Ability to handle ambiguity and make pragmatic engineering decisions
• Strong ownership - able to take features from idea to production
• Comfort working in fast-moving environments with evolving requirements

• Build end-to-end product features across frontend, backend, and AI integrations
• Design agent workflows that handle planning, tool use, failure, and recovery across multiple steps
• Integrate LLMs, memory, and external tools into systems that behave reliably under real-world conditions
• Design real-time AI interactions with streaming, partial results, and tight latency constraints
• Improve system reliability, observability, and fallback mechanisms
• Collaborate closely with ML, backend, and product teams to ship features end-to-end
• Continuously iterate based on real usage and failure modes