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Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 3525 posts
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CDN and Edge Computing Deep Dive — Anycast, Cache Invalidation, DDoS Defense, Lambda@Edge vs Workers vs Compute
From Akamai in 1998 to 2025 edge computing. The magic of Anycast, cache tier design, the philosophy of cache invalidation, the three-layer DDoS defense, and an architecture comparison of Lambda@Edge vs Cloudflare Workers
2026-04-15 · 14 min read #cdn#edge-computing#cloudflare#akamai#fastlyAPI Design Complete Guide — REST, OpenAPI, Versioning, Pagination, Idempotency, Webhooks (2025)
REST Maturity, OpenAPI 3.1, Versioning, Pagination (Offset/Cursor/Keyset), Idempotency Key, Rate Limiting, Webhook retries, AsyncAPI — the 2025 state of API design.
2026-04-15 · 10 min read #api#rest#openapi#webhook#versioningBinary Serialization Complete Guide 2025: Protobuf, Thrift, Avro, MessagePack, FlatBuffers, Cap'n Proto — Choosing Between Performance and Flexibility ♪ Listenable
Binary formats that are 10x faster and 5x smaller than JSON. From Protocol Buffers varint through FlatBuffers zero-copy to Avro schema evolution — a complete 720-line analysis of the internal structure and real-world sel
2026-04-15 · 29 min read #serialization#protobuf#thrift#avro#messagepackAI Product Design Complete Guide: Generative UI, Trust, Feedback, Streaming, Agent UX, Korean Culture Specialization (2025)
A good AI product is not "a good model + good UX" — it is "UX design that builds trust within constraints." The boundary between deterministic and generative UI, designing for trust, uncertainty, and editability, streami
2026-04-15 · 10 min read #ai-product-design#ux#generative-ui#trust#streamingAWS Well-Architected Framework Complete Guide 2025: Six Pillars, Practical Adoption, Cost/Security/Performance
Everything about the AWS Well-Architected Framework: six pillars (Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization, Sustainability), practical checklists, Well-Architected Tool usa
2026-04-15 · 14 min read #aws#well-architected#cloud-architecture#security#reliabilityAPI Versioning & Evolution Strategy Complete Guide 2025: Breaking-Change-Free API Evolution, Deprecation, Sunset
Everything about API versioning! URL/Header/Content negotiation strategies, breaking vs additive changes, Semantic Versioning, deprecation policy, Sunset header, GraphQL versionless approach, case studies of Stripe/GitHu
2026-04-15 · 12 min read #api#versioning#evolution#breaking-changes#deprecationANN Algorithms Complete Guide 2025: HNSW, IVF, Product Quantization, LSH — How Vector DBs Really Work
How Pinecone, Weaviate, Qdrant, and pgvector find similar items in milliseconds across hundreds of millions of vectors. A deep dive into the math and implementation of HNSW, IVF, Product Quantization, and LSH.
2026-04-15 · 14 min read #ann#hnsw#ivf#product-quantization#lshAI-Era Developer Survival Strategy 2025 — Complete Guide: Copilot vs Cursor vs Claude Code vs Devin vs Codex, Prompt to Context Engineering, Senior/Junior Role Shifts, Team AI Adoption Roadmap, Portfolio, Korean Developers' Global Competitiveness — Season 5 Finale
The grand finale of Season 5. A survival strategy for developers living through the AI era of 2025. A deep comparison of GitHub Copilot, Cursor, Claude Code, Devin, and Codex; the shift from Prompt to Context Engineering
2026-04-15 · 15 min read #ai-developer#copilot#cursor#claude-code#devinWebAssembly and WASI Deep Dive — Bytecode, Sandbox, Component Model, Wasmtime, Edge Runtimes
How a romantic idea of running C++ in the browser reshaped the backend. From asm.js origins to Wasm bytecode, capability-based sandboxing, WASI, the Component Model, Wasmtime/Wasmer/WasmEdge, and Cloudflare edge strategy
2026-04-15 · 12 min read #webassembly#wasi#cloudflare-workers#wasmtime#systemsRedis Internals & Distributed Cache — Single Thread, Data Structures, Cluster, Sentinel, RDB/AOF, Redlock, Valkey, Dragonfly Deep Dive (2025)
Why does single-threaded Redis hit 1M QPS? From String to Stream across 9 data structures, Cluster hash slots, Sentinel HA, RDB/AOF tradeoffs, Cache-Aside and Thundering Herd, the Redlock debate, the 2024 license drama a
2026-04-15 · 15 min read #redis#valkey#cache#distributed-systems#infraGo Complete Guide — Goroutine, Channel, Context, and Real-World Microservices (Season 2 Ep 3, 2025)
Go is famous for being easy to learn, but real production Go is full of non-obvious traps: Context propagation, Goroutine leaks, Channel deadlocks, nil interface gotchas. This post covers the true meaning of Go philosoph
2026-04-15 · 13 min read #go#golang#goroutine#channel#contextThe Frontend Engineer in 2025 — Career Growth, RSC, Signals, AI, Edge, Burnout (Season 6 Finale)
The Season 6 finale: where is the frontend engineer role in 2026? Server Components and Signals changed the mental model. AI pair-programmers changed how we write code. The "full-stack TypeScript" identity matured. Here
2026-04-15 · 8 min read #frontend#career#rsc#signals#aiThe Engineer Series Grand Finale: 18 Posts Woven Into One, a 2026 Action Plan, Monthly Checkpoints, and a 3-Year Roadmap — The Complete Guide (2025~2026)
An integration guide that threads the 18-post engineer series into a single system. The one-line core of every post, a 4 Capitals × 18 domains matrix, a month-by-month Action Plan for 2026, checkpoints at 30 days, 90 day
2026-04-15 · 12 min read #series-finale#synthesis#action-plan#integration#roadmapDeveloper Personal Finance Complete Guide: Salary Negotiation, RSU/Options, 401k, Startup Equity, FIRE (2025) ♪ Listenable
The science of salary negotiation, RSU vs stock options, Korean ESOP tax law, 401k and retirement pensions, startup equity vesting and exit scenarios, FIRE (Financial Independence Retire Early) math, personal finance in
2026-04-15 · 17 min read #personal-finance#salary-negotiation#rsu#stock-option#startup-equityThe Developer Learning Complete Guide: New Languages, New Domains, Papers, Lifelong Learning, and AI Learning Partners (2025)
The science of adult learning (Benedict Carey, Barbara Oakley). Reading proficiency in a new language in 30 days. The 3-pass paper reading method (S. Keshav). Building a learning system with Zettelkasten and Obsidian. Co
2026-04-15 · 15 min read #learning#skill-acquisition#programming-language#papers#ai-learningThe Complete Actor Model Guide 2025: Erlang OTP, Akka, Orleans, Elixir — The Real Way to Handle Millions of Concurrent Connections ♪ Listenable
How WhatsApp handled 2 million TCP connections on a single server. From the mathematical foundations of the Actor Model to Erlang OTP, Akka, and Microsoft Orleans — a 720-line deep dive into the "Let it crash" philosophy
2026-04-15 · 32 min read #actor-model#erlang#akka#orleans#elixirWeb Performance Optimization Complete Guide 2025: Core Web Vitals, LCP/INP/CLS, Loading Strategies ♪ Listenable
Everything about web performance optimization! Core Web Vitals (LCP/INP/CLS), image optimization (WebP/AVIF/lazy), bundle optimization (Tree Shaking/Code Splitting/Dynamic Import), caching strategies (Service Worker/CDN/
2026-04-14 · 22 min read #web-performance#core-web-vitals#lcp#inp#clsSmart Contract Development Complete Guide 2025: Solidity, Foundry, Security Patterns, DeFi Implementation
Everything about smart contract development. Solidity syntax, EVM fundamentals, Foundry vs Hardhat, OpenZeppelin library, gas optimization, security patterns (Reentrancy/Integer Overflow/Front-running), upgradeable contr
2026-04-14 · 14 min read #smart-contract#solidity#foundry#hardhat#ethereumMulti-Cloud Strategy & Migration Complete Guide 2025: AWS/GCP/Azure Comparison, Hybrid Cloud ♪ Listenable
Everything about Multi-Cloud! AWS vs GCP vs Azure service mapping, multi-cloud architecture patterns, hybrid cloud (Anthos/Azure Arc/EKS Anywhere), cloud migration 6R strategy, vendor lock-in prevention, DR (disaster rec
2026-04-14 · 23 min read #multi-cloud#cloud-migration#aws#gcp#azureLinux Performance Engineering Complete Guide 2025: Profiling, System Tuning, eBPF, Bottleneck Analysis ♪ Listenable
Everything about Linux performance! USE methodology (Utilization/Saturation/Errors), perf/bpftrace/eBPF, Flame Graphs, CPU/memory/disk/network bottleneck analysis, sysctl tuning, cgroups v2, I/O schedulers, NUMA, kernel
2026-04-14 · 21 min read #linux#performance#profiling#ebpf#perf