José David Baena – Distributed Systems Engineer https://josedavidbaena.com Production notes and source-backed analysis on distributed systems, messaging infrastructure, open-source internals, and model engineering. en-us josedab@gmail.com (José David Baena) josedab@gmail.com (José David Baena) Tue, 28 Jul 2026 00:00:00 GMT https://josedavidbaena.com/blog/kimi-k3/02-architecture-kda-attnres-experts Inside Kimi K3: How KDA, AttnRes, and 896 Experts Work https://josedavidbaena.com/blog/kimi-k3/02-architecture-kda-attnres-experts Trace Kimi K3's 69 KDA layers, 24 gated MLA layers, Attention Residuals, and 896 experts without overstating what released artifacts prove. Tue, 28 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kimi-k3architectureattentionmixture-of-expertsmachine-learning https://josedavidbaena.com/blog/exploration-redpanda/architecture-overview Redpanda Architecture: Kafka Outside, Shards Inside https://josedavidbaena.com/blog/exploration-redpanda/architecture-overview Redpanda presents Kafka APIs outside while sharded C++, per-partition Raft, and raft0 define the implementation and operational boundaries inside. Fri, 08 May 2026 00:00:00 GMT josedab@gmail.com (José David Baena) redpandakafkaarchitectureseastardistributed-systems https://josedavidbaena.com/blog/kafka-compatibility-portability-boundaries Kafka Compatibility Is Not the Same as Portability https://josedavidbaena.com/blog/kafka-compatibility-portability-boundaries Kafka client compatibility lowers rewrite cost. Portability still depends on semantics, state, durable authority, operations, migration, and contract. Fri, 06 Mar 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkastreamingcompatibilityarchitecturemigrations https://josedavidbaena.com/blog/kafka-consumer-groups-platform-infrastructure Kafka Consumer Groups Are Platform Infrastructure https://josedavidbaena.com/blog/kafka-consumer-groups-platform-infrastructure A platform contract should own Kafka client lifecycle, migration, and observability without pretending it can own application side effects. Fri, 06 Feb 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsconsumer-groupsplatform-engineeringarchitecture https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-diagrams-three-architectures-one-solution Three Architectures, One Solution: Building a Mermaid.js Diagram System https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-diagrams-three-architectures-one-solution Three Mermaid-in-Next.js architectures, one that shipped. Index post for a 3-part case study on build-time rendering, over-engineering, and deletion. Mon, 20 Oct 2025 00:00:00 GMT josedab@gmail.com (José David Baena) nextjsmermaidarchitectureperformancecase-studypragmatic-engineering https://josedavidbaena.com/blog/tiny-language-models/tiny-llm-case-studies-production Tiny LLM Deployment Patterns: Architecture Blueprints from Published Benchmarks https://josedavidbaena.com/blog/tiny-language-models/tiny-llm-case-studies-production Deployment patterns for tiny LLMs in healthcare, legal, manufacturing, and edge—grounded in published benchmarks from Microsoft, Apple, and MLPerf. Mon, 13 Oct 2025 00:00:00 GMT josedab@gmail.com (José David Baena) machine-learningdeployment-patternsproductionbenchmarksarchitecture https://josedavidbaena.com/blog/tiny-language-models/tiny-llm-architecture-comparison Tiny LLM Architecture Comparison: TinyLlama vs Phi-2 vs Gemma vs MobileLLM https://josedavidbaena.com/blog/tiny-language-models/tiny-llm-architecture-comparison Seven tiny models, one decision. Phi-2 wins on reasoning (56.7% MMLU). MobileLLM on speed (120 tok/s). Qwen on multilingual. Match constraints to model. Sat, 20 Sep 2025 00:00:00 GMT josedab@gmail.com (José David Baena) machine-learningllmarchitecturebenchmarkscomparison