Backend Engineer, AI (Agent Systems)

About the role

The Backend Engineer, AI owns the inference and orchestration layer that powers all AI interactions, building and operating production systems that expose fast, stable, observable APIs to mobile and desktop clients, while handling latency, correctness, reliability and cost.

About the company

A1 is building a proactive smart assistant that brings AI intelligence to everyday applications like email, notes, and tasks. The company focuses on high‑reliability, long‑running workflows, persistent context and real‑world task completion for billions of users.

Requirements

• Strong backend engineering fundamentals in production environments
• Experience running high‑throughput, low‑latency services
• Familiarity with AI inference patterns including LLMs, embeddings, and multimodal models
• Comfortable debugging distributed systems under load
• Bias toward shipping and learning from production behavior
• Proficiency in Python and Node.js
• Experience with PyTorch and LLM frameworks such as OpenAI or Anthropic
• Knowledge of SQL and NoSQL databases
• Experience with Kubernetes and Docker