--- title: Best Joud Awad posts — July 2026 | daily.dev description: The most upvoted Joud Awad posts from July 2026, curated by the daily.dev community. canonical: https://daily.dev/sources/iac4jsbu0lv8wbsc85fsh/best-of/2026/07 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/iac4jsbu0lv8wbsc85fsh/best-of/2026/07 og:type: website og:site_name: daily.dev og:title: Best Joud Awad posts — July 2026 | daily.dev og:description: The most upvoted Joud Awad posts from July 2026, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Joud Awad — July 2026 1. 1 [](https://daily.dev/posts/free-e-book-with-60-scenario-based-system-design-interview-questions-5mpw8iefc "Free e-book with 60 scenario-based system design interview questions") Article Joud Awad · 9w Free e-book with 60 scenario-based system design interview questions A free e-book of 60+ scenario-based system design interview questions, designed to go beyond memorizing architectures and focus on tradeoffs — like handling 10x traffic, eventual consistency costs, and queue usage patterns. Questions range from beginner-friendly to advanced, useful both for interview prep and for pressure-testing assumptions in production systems. 540 106 2. 2 [](https://daily.dev/posts/day-1-30-aws-system-design-patterns-mkhcecn0y "Day 1/30 AWS System Design Patterns") Article Joud Awad · 7w Day 1/30 AWS System Design Patterns A gaming platform leaderboard stored in DynamoDB experiences ThrottlingException errors and high P99 latency on reads for a single dominant game ('battle-royale'), despite CloudWatch showing consumed RCUs well below provisioned capacity. Doubling provisioned RCUs fails to resolve the issue. The root cause is a hot partition: when traffic concentrates on a single partition key, that partition hits its own throughput ceiling regardless of total table-level RCU headroom. The correct answer is C — per-partition limits apply independently of aggregate table provisioning. 298 67 3. 3 [](https://daily.dev/posts/60-60-days-system-design-questions-flzgx5ght "60/60 Days System Design Questions") Article Joud Awad · 10w 60/60 Days System Design Questions A system design challenge posing the classic architecture decision for a new SaaS platform needing 50,000 RPS, multi-tenancy, real-time data, global users, and AI inference. Four architectural approaches are presented: distributed microservices from day one, a modular monolith with incremental extraction, serverless with Lambda/DynamoDB/SQS, and event-driven architecture with Kafka as the backbone. This is framed as the final entry in a 60-day system design series, inviting engineers to debate the tradeoffs. 203 45 4. 4 [](https://daily.dev/posts/57-60-days-system-design-questions-niduayotf "57/60 Days System Design Questions") Article Joud Awad · 10w 57/60 Days System Design Questions A system design challenge presents a high-traffic scenario with 50k writes/sec and 500k reads/sec on a Postgres setup with one primary and two async replicas. The problem: a payment confirmation flow reads stale data from a replica due to 80–300ms replication lag. Four options are presented to achieve read-after-write consistency without sacrificing write throughput: synchronous replication, semi-sync replication, routing payment reads to the primary, or adding a sleep delay after writes. 167 22 5. 5 [](https://daily.dev/posts/56-60-days-system-design-questions-wphlukni9 "56/60 Days System Design Questions") Article Joud Awad · 10w 56/60 Days System Design Questions Long-running background jobs break assumptions built for synchronous APIs. Using a video upload scenario (2–8 minutes, millions of users), four client notification strategies are compared: polling, webhooks, SSE/WebSocket, and synchronous wait. Beyond transport choice, four critical design problems are highlighted that teams typically get wrong: idempotency (safe retries), progress granularity (meaningful intermediate states), distinguishing timeout from failure (heartbeats/visibility timeouts), and deduplication (scoped dedup keys to prevent double-processing). 152 27 [See all Joud Awad archives](/sources/iaC4JsBU0lV8wBsc85fSh/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/iaC4JsBU0lV8wBsc85fSh/best-of/2026/07#page","url":"https://daily.dev/sources/iaC4JsBU0lV8wBsc85fSh/best-of/2026/07","name":"Best Joud Awad Posts — July 2026","description":"The most upvoted Joud Awad posts from July 2026, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/iaC4JsBU0lV8wBsc85fSh/best-of/2026/07#items","numberOfItems":5,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/free-e-book-with-60-scenario-based-system-design-interview-questions-5mpw8iefc","name":"Free e-book with 60 scenario-based system design interview questions"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/day-1-30-aws-system-design-patterns-mkhcecn0y","name":"Day 1/30 AWS System Design Patterns"},{"@type":"ListItem","position":3,"url":"https://daily.dev/posts/60-60-days-system-design-questions-flzgx5ght","name":"60/60 Days System Design Questions"},{"@type":"ListItem","position":4,"url":"https://daily.dev/posts/57-60-days-system-design-questions-niduayotf","name":"57/60 Days System Design Questions"},{"@type":"ListItem","position":5,"url":"https://daily.dev/posts/56-60-days-system-design-questions-wphlukni9","name":"56/60 Days System Design Questions"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Sources","item":"https://daily.dev/sources"},{"@type":"ListItem","position":3,"name":"Joud Awad","item":"https://daily.dev/sources/iaC4JsBU0lV8wBsc85fSh"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/sources/iaC4JsBU0lV8wBsc85fSh/best-of"},{"@type":"ListItem","position":5,"name":"July 2026"}]}]} ```