https://behzadfattahi.com/blog Articles by Behzad Fattahi on software architecture, .NET, React, and building systems that stay fast under load. en Sun, 16 Aug 2026 08:00:00 GMT https://behzadfattahi.com/blog/agent-development-lifecycle https://behzadfattahi.com/blog/agent-development-lifecycle Sun, 16 Aug 2026 08:00:00 GMT Cloudflare says agents write code faster than teams can review, deploy, and maintain it. I run that lifecycle on a one-person site, and the bottleneck is real. AI Process MCP https://behzadfattahi.com/blog/order-by-nulls-index-scan https://behzadfattahi.com/blog/order-by-nulls-index-scan Fri, 14 Aug 2026 08:00:00 GMT A null-placement wrapper in generated SQL made every sorted query a full scan. Why medium data still timed out, and the fix that shipped in Hasura v2.50.0. SQL Server Performance Architecture https://behzadfattahi.com/blog/reading-ai-code https://behzadfattahi.com/blog/reading-ai-code Thu, 13 Aug 2026 08:00:00 GMT Sonar says 42% of committed code is AI-generated or assisted, 96% of developers do not fully trust it, and only 48% always verify. Triage is the new skill. AI Process Architecture https://behzadfattahi.com/blog/kafka-queues-consumer-scaling https://behzadfattahi.com/blog/kafka-queues-consumer-scaling Tue, 11 Aug 2026 08:00:00 GMT Kafka finally has real queue semantics: share groups decouple consumers from partitions. What that changes about scaling consumers, and what it costs you. Apache Kafka Architecture Scalability https://behzadfattahi.com/blog/mqtt-agent-permissions https://behzadfattahi.com/blog/mqtt-agent-permissions Thu, 06 Aug 2026 08:00:00 GMT AI agents are joining device fleets as MQTT clients. What fleet ACLs already solve, what genuinely changes, and how I would wire agent permissions today. MQTT IoT Security MCP https://behzadfattahi.com/blog/mcp-stateless-by-default https://behzadfattahi.com/blog/mcp-stateless-by-default Wed, 05 Aug 2026 08:00:00 GMT MCP servers just went stateless by default. Why that mirrors the journey every scaling backend takes, what MRTR really is, and where a session is still right. .NET Architecture MCP Scalability https://behzadfattahi.com/blog/version-upgrades-performance https://behzadfattahi.com/blog/version-upgrades-performance Sun, 02 Aug 2026 08:00:00 GMT A runtime release is the cheapest performance work you can buy: how I read one with a production lens, verify wins on my hot paths, and decide when to jump. .NET Performance Architecture Process https://behzadfattahi.com/blog/before-the-first-commit https://behzadfattahi.com/blog/before-the-first-commit Fri, 31 Jul 2026 08:00:00 GMT Most engineering failures are understanding failures. The stakeholder questions I ask before implementing any feature, and why designing on the growth curve keeps scaling from becoming a rewrite. Architecture Process Scalability Cloud-Native https://behzadfattahi.com/blog/mqtt-acl-topic-patterns https://behzadfattahi.com/blog/mqtt-acl-topic-patterns Sun, 12 Jul 2026 08:00:00 GMT The topic tree is an API and the ACL is its type system. Designing MQTT topic hierarchies and wildcard subscriptions, locking devices down with placeholder ACL rules, and why EMQX is a strong default for high-throughput fleets. MQTT IoT EMQX Security https://behzadfattahi.com/blog/vertical-vs-horizontal-scaling https://behzadfattahi.com/blog/vertical-vs-horizontal-scaling Sun, 28 Jun 2026 08:00:00 GMT Scaling up and scaling out solve different problems. How to choose between them for stateless servers, databases, Apache Kafka, and Kubernetes — with the failure modes each choice buys you. Architecture Apache Kafka Kubernetes Scalability https://behzadfattahi.com/blog/realtime-backpressure-dotnet https://behzadfattahi.com/blog/realtime-backpressure-dotnet Sun, 17 May 2026 08:00:00 GMT Push-based APIs fail differently than request/response ones. Choosing between SignalR, raw WebSockets, SSE, and polling — and designing for slow consumers before they take the server down. .NET SignalR Real-time WebSockets https://behzadfattahi.com/blog/offline-first-react https://behzadfattahi.com/blog/offline-first-react Thu, 09 Apr 2026 08:00:00 GMT This site paints instantly from bundled data and treats the API as an upgrade, not a dependency. The pattern, the trade-offs, and where it stops being worth it. React Performance Resilience