System design checklist updated
A new 15‑item pre‑interview checklist is trending for 2026, pushing candidates to nail CAP tradeoffs, partitioning, caching, rate limiting and diagram-first explanations before any system‑design round. An insider grading breakdown from the same author shows L6 answers must identify ambiguity, edge cases and business impact—clarity and trade-off reasoning now separate mid from senior hires ( ).
Arslan Ahmad — the author behind the System Design Nuggets Substack and founder of DesignGurus — published the 15‑item pre‑interview checklist on his Substack feed under the System Design Nuggets publication. (designgurus.substack.com) The checklist explicitly enumerates 15 checkpoints that prioritize CAP/PACELC tradeoffs, data partitioning decisions, caching strategies, distributed rate‑limiting and a diagram‑first explanation workflow for whiteboard rounds. (storage.googleapis.com) A companion post by the same author grades three system‑design answers and marks Level‑6 (L6) responses by whether they call out ambiguity, enumerate edge cases, and quantify business impact as part of their trade‑off rationale. (designgurus.substack.com) DesignGurus’ advanced curriculum and the “Volume II” track are explicitly aimed at L5/L6 hires and formalize senior expectations — including end‑to‑end SLO thinking and impact‑centric trade‑offs — as hiring criteria for senior roles. (designgurus.io) Industry prep trends for 2026 mirror the checklist: interview coaching and advisory pieces now push cost‑aware architecture, event‑driven patterns, multi‑region design, AI‑inference considerations, and observability (SLOs/metrics) into standard evaluation rubrics. (thita.ai) DesignGurus’ System Design Master Template and crash‑course PDF surface a reproducible 14‑step framework and diagram‑first templates that the checklist reuses to make clarity and trade‑off reasoning measurable during mock grading and live interviews. (designgurus.io)
