We assess demonstrated building in ways that respect your time and your confidentiality obligations to current and former employers: a portfolio deep-dive (walk us through systems you built and kept running, at the level of detail your obligations allow; we want architecture, decisions, and trade-offs, never proprietary code, data, or documents), a short, time-capped build exercise on a synthetic problem unrelated to OKX's business (a small agentic workflow with an evaluation harness, used for assessment only and never put to use by OKX; the work remains yours) that you defend live, walking us through your design decisions and extending it on the spot, a systems-design session on taking a prototype estate to production, and references focused on whether you built and operated systems in production. Build the agentic runtime and harness: orchestration, multi-model routing that sends each task to the right model, tool, MCP, and plugin integration across model providers, and the evaluation, red-team, and regression harnesses that grade agents before and after production, with evaluation gates, judge calibration, and cost controls that hold for each model, including prompt-injection and data-exfiltration threat modeling for agents that read untrusted content.