Covers leading and executing technical change that raises the engineering bar while preserving operational stability. Topics include identifying and prioritizing innovation opportunities, sponsoring research and experimentation, running proofs of concept and pilots, and introducing new tools or frameworks. Also includes strategies for modernizing legacy systems and architecture with minimal business disruption, managing technical debt, migration planning, rollback and cutover approaches, and maintaining reliability and continuity. Evaluated skills include optimizing performance and cost at scale, establishing engineering standards and best practices, governance and risk management, stakeholder alignment and communication, measuring impact and return on investment, and balancing long term innovation with short term pragmatism.
MediumTechnical
0 practiced
Design an observability plan to support a modernization rollout. List essential metrics, logs, traces, SLOs, alert thresholds, dashboards, and runbook updates required to detect regressions and enable fast recovery during and after the rollout.
MediumSystem Design
0 practiced
Design a multi-region, read-heavy service that provides <100ms latency to users globally. Requirements: reads can be eventually consistent, writes are regional, the system should gracefully handle region failures, and data replication lag must be bounded. Describe routing, replication strategy, conflict resolution, and failover behavior.
HardTechnical
0 practiced
After modernizing several services, the global API layer must handle 500k RPS. Propose optimizations to control cost while maintaining performance: multi-layer caching strategies, batching/aggregation, protocol choices, resource sizing, autoscaling strategies, and the trade-offs each optimization introduces.
HardTechnical
0 practiced
You must modernize a stateful monolith that keeps user sessions in memory into stateless microservices. Propose a plan for session management including options (external session store, JWTs, sticky sessions), trade-offs (scaling, security, latency), session migration strategy, and how to maintain a seamless user experience during the transition.
MediumTechnical
0 practiced
Discuss trade-offs between monolith-first, modular monolith, and microservices architectures for a product expected to scale to millions of users. Address development velocity, operational complexity, testing, deployment, and team organization implications for each approach.
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