Technical practice
How would you design a deployment API for agent and model workloads that can evolve without breaking clients?
What to coverThe role owns resource models, lifecycle semantics, versioning, backward compatibility and error behavior. Suggested preparation: explain how you would define states and failures, then evaluate an API change against existing client integrations.
How would you diagnose a Kubernetes workload that cannot be scheduled?
What to coverThe posting calls for understanding the API server, scheduler, controllers, CRDs, admission, resource requests and limits, node pools and device plugins. Suggested preparation: trace the workload from admission through scheduling, distinguishing capacity, policy and accelerator-availability failures.
How would you place competing workloads on heterogeneous GPUs?
What to coverThe role covers topology-aware placement, MIG, fractional or time-sliced sharing, GPU memory constraints and utilization economics. Suggested preparation: compare isolation and efficiency under contention, including the cost of reserving an accelerator that a tenant does not fully use.
How would you define fair capacity allocation across tenants?
What to coverThe control plane owns quota and priority, while the posting emphasizes noisy neighbors and isolation that can withstand security review. Suggested preparation: describe how you would evaluate fairness, enforce boundaries and handle requests when capacity is exhausted.
What customer-facing scaling controls would you offer for cost versus latency?
What to coverThe role owns autoscaling signals, cold starts, scale-to-zero and headroom policy. Suggested preparation: compare response-time and cost consequences for bursty agent and model traffic, and explain how you would make those trade-offs understandable to customers.
How would you handle an agent restart or eviction without losing necessary session state?
What to coverThe posting describes long-lived agents with session state and tool-call fan-out, and assigns ownership of isolation, tool execution and state recovery. Suggested preparation: distinguish runtime recovery from agent authoring, and discuss the trade-offs among continuity, isolation and resource use.
How would you route requests to model and agent endpoints when request costs vary widely?
What to coverThe role covers ingress, request-aware load balancing, tenancy boundaries and private connectivity; service-networking depth is listed as preferred. Suggested preparation: compare routing signals and failure modes while accounting for uneven request cost and customer-network boundaries.
What would make deployment and invocation audit records useful in a regulated environment?
What to coverThe role owns records of who deployed and invoked a workload, under which policy and access control, and whether those records survive an audit. Suggested preparation: specify the questions a record must answer and discuss access, integrity and operational trade-offs without assuming a particular compliance standard.
How would you define inference metering for tenant attribution and pricing inputs?
What to coverThe posting assigns ownership of measuring inference, applying quotas, attributing usage to tenants and providing pricing inputs. Suggested preparation: identify what must be counted, where attribution could become ambiguous and how you would check that metering remains useful under failures.
How would you define reliability goals and diagnose a degraded deployment?
What to coverThe role owns SLOs, error budgets and diagnostic capabilities that let platform engineers investigate without opening a support ticket. Suggested preparation: distinguish customer-visible symptoms from underlying signals, and explain how production data would guide reliability trade-offs.
Behavioural practice
Tell me about a time you aligned teams around a platform roadmap without direct authority.
What to coverThis principal role holds a roadmap across two engineering pods and aligns with product teams, with no direct reports. Suggested preparation: give a real situation, the actions you took to resolve competing priorities, and the resulting decision or measurable outcome.
Describe a time you had to revisit an API contract after other teams depended on it.
What to coverThe posting emphasizes ownership of a public or platform API and the consequences of a shipped contract. Suggested preparation: use a real example to cover the compatibility problem, how you involved integrators, what you changed and the result.
Tell me about a time production evidence changed your infrastructure product priorities.
What to coverThe role involves design reviews, API contracts and production data, alongside reliability and capacity decisions. Suggested preparation: explain the original assumption, the signal that challenged it, the action you took and the observed outcome.
Describe a time you resolved a disagreement about an isolation or access-control trade-off.
What to coverMulti-tenant isolation and governance are central to the role, which also requires collaboration with matrixed engineering teams. Suggested preparation: recount a real situation, how you worked through security and usability concerns, the decision and its result.
Tell me about something you built yourself to test a product idea.
What to coverThe posting asks candidates to bring one or two things they built with AI tooling; it gives API prototypes and evaluation harnesses as examples. Suggested preparation: describe the question you needed to answer, what you built and learned, and how that evidence affected a decision.