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Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 3517 posts
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Python Backend 2025 Complete Guide: FastAPI vs Django, Async Patterns, and AI Service Architecture
Everything about Python backend! FastAPI vs Django comparison, async/await patterns, Pydantic v2 validation, SQLAlchemy 2.0, Celery task queues, AI service architecture (LangChain+FastAPI), performance optimization, and
2026-03-23 · 18 min read #python#fastapi#django#async#uvicornOpenAI AI Success Engineer (Seoul) Complete Guide: From Technical Leadership to Customer Value
Complete analysis of OpenAI AI Success Engineer Seoul JD. OpenAI API/SDK deep dive, RAG/embeddings/fine-tuning skills, enterprise customer success strategies, C-level communication, and program management — with 30 inter
2026-03-23 · 42 min read #openai#success-engineer#customer-success#technical-account-management#ai-deploymentWeb Performance Optimization Complete Guide 2025: Core Web Vitals, Loading Strategies, and Rendering Patterns
Everything about web performance! Core Web Vitals (LCP/CLS/INP) optimization, image/font/JS optimization, Code Splitting, Tree Shaking, Service Worker, CDN, rendering patterns (SSR/SSG/ISR/Streaming), and achieving a Lig
2026-03-23 · 22 min read #web-performance#core-web-vitals#lcp#cls#inpOAuth2 & JWT Complete Guide: Everything About Authentication and Authorization for Developers
Everything about OAuth2 and JWT with practical code! Authorization Code/PKCE/Client Credentials flows, JWT structure and signature verification, Access/Refresh Token strategies, Session vs Token comparison, OIDC, securit
2026-03-23 · 23 min read #oauth2#jwt#authentication#authorization#securityAdvanced TypeScript Patterns Mastery: From Generics to Type Gymnastics — 2025 Practical Guide
Master the advanced type system of TypeScript 5.x. Conditional Types, Mapped Types, Template Literal Types, Branded Types, Zod schema validation, tRPC type-safe APIs — 30 type gymnastics exercises on the path to senior d
2026-03-23 · 29 min read #typescript#generics#type-system#design-patterns#advancedMicroservices Architecture 2025 Complete Guide: From Monolith to MSA, and Back to Modular Monolith
Everything about microservices! Monolith vs MSA vs Modular Monolith, DDD service decomposition, communication patterns (gRPC/REST/events), Service Mesh (Istio), Saga pattern, OpenTelemetry observability, and deployment s
2026-03-23 · 28 min read #microservices#monolith#modular-monolith#service-mesh#istioAI Role Behavioral Interview Complete Guide: Turning Experience into Weapons with STAR
Master behavioral questions in AI role interviews. STAR framework, Amazon LP mapping, 30 scenario answers, 50 Korean-English expression pairs, company-specific tips for Google, Meta, Anthropic, Amazon.
2026-03-23 · 29 min read #interview#behavioral#star-method#ai-careers#fdeGraphQL Complete Guide 2025: Beyond REST — From Schema Design to Federation and Performance Optimization
Everything about GraphQL! REST vs GraphQL comparison, Schema Design (SDL), Resolver patterns, N+1 problem solving with DataLoader, microservice integration with Apollo Federation, real-time Subscriptions, security, and p
2026-03-23 · 17 min read #graphql#rest#api#apollo#schemaSpring Boot 3.x Complete Guide 2025: Virtual Threads, GraalVM Native, Spring AI
Everything about Spring Boot 3.x! Java 21 Virtual Threads, GraalVM Native Image, Spring AI, Security 6, Testcontainers, Observability complete guide.
2026-03-23 · 19 min read #spring-boot#java#virtual-threads#graalvm#spring-aiGitHub Actions CI/CD Complete Guide: Go Builds, Branch Strategies, and Auto-Deploy
Build production-grade CI/CD pipelines with GitHub Actions for Go projects. Trunk-Based vs GitHub Flow vs Git Flow branch strategies, multi-stage Docker builds, K8s auto-deploy, secret management, matrix builds, and cach
2026-03-23 · 24 min read #github-actions#ci-cd#go#golang#gitSI Industry AI Transformation: Korean Tech Giants AX Strategy and Engineer Survival Guide
Korea's SI industry is pivoting from DX to AX (AI Transformation). Samsung SDS's exclusive OpenAI reselling and FabriX, LG CNS's IPO and AI coding platform, SK's AI data centers — essential skills and career strategies f
2026-03-23 · 24 min read #si#systems-integration#samsung-sds#lg-cns#skRegular Expressions Complete Guide 2025: From Basics to Advanced Patterns and Real-World Applications
Everything about regex! Basic syntax (., , +, ?), groups and capturing, Lookahead/Lookbehind, greedy vs lazy matching, 30 practical patterns (email/URL/IP/phone), performance optimization (ReDoS prevention), and language
2026-03-23 · 15 min read #regex#regular-expression#pattern-matching#text-processing#validationEAI (Enterprise Application Integration) Complete Guide: Everything About Enterprise System Integration
Everything about EAI in one post! Hub-and-Spoke, ESB, API-Led, event-driven architecture pattern comparison, Gregor Hohpe Enterprise Integration Patterns, MuleSoft/Apache Camel/Dell Boomi platform comparison, and a real-
2026-03-23 · 23 min read #eai#enterprise-integration#middleware#esb#api-gatewayPalantir FDE (Forward Deployed Engineer) Complete Guide: Role, Skills, and Customer Handling Strategies
A complete dissection of Palantir Forward Deployed Engineer role. Covering Foundry/Gotham/AIP platform mastery, on-site deployment culture, technical skills (Python/SQL/data modeling), customer handling frameworks (HEARD
2026-03-23 · 37 min read #palantir#fde#forward-deployed-engineer#customer-success#customer-handlingDeveloper Career Growth Roadmap: From Junior to Senior to Staff+ Engineer
Everything about developer career growth! Level-by-level roles from Junior to Senior to Staff to Principal, IC vs Manager track selection, concrete promotion strategies, tech leadership, salary negotiation, and when to c
2026-03-23 · 14 min read #career#senior-engineer#staff-engineer#tech-lead#engineering-managerDatabase Complete Comparison 2025: PostgreSQL vs MySQL vs MongoDB vs Redis — Selection Guide
Everything about database selection in 2025! PostgreSQL (JSONB+pgvector), MySQL (HeatWave ML), MongoDB (Atlas Vector Search), Redis (Stack/Search) — architecture, performance benchmarks, cost comparison, use-case selecti
2026-03-23 · 29 min read #database#postgresql#mysql#mongodb#redisOpenAI AI Deployment Engineer (Seoul) Complete Guide: Roadmap to Deploying GPT for the Enterprise
A complete analysis of the OpenAI Seoul AI Deployment Engineer JD. Deploying GPT to Fortune 500 companies — deep dive into Python, K8s, RAG, LangGraph, agentic workflows, model fine-tuning + 3-stage interview strategy +
2026-03-23 · 25 min read #openai#ai-deployment-engineer#python#kubernetes#ragCompilers and Interpreters: How Code Actually Runs — Everything Developers Need to Know
A complete deep-dive into how code executes! Lexing → Parsing → AST → IR → Code Generation, Compiler vs Interpreter vs JIT, V8 (JS), CPython (Python), JVM (Java), GCC/LLVM, GraalVM — build the performance intuition every
2026-03-23 · 17 min read #compiler#interpreter#lexer#parser#astNext.js 15 + React 19 Complete Guide: Server Components to Server Actions — 2025 Production Handbook
Master the innovations of Next.js 15 and React 19. From Server Components and Server Actions to Turbopack, PPR, caching strategies, and advanced App Router patterns — a production-ready guide for developers migrating fro
2026-03-23 · 34 min read #nextjs#react#server-components#server-actions#rscAWS vs GCP vs Azure Complete Comparison 2025: Service Mapping, Pricing, Certifications, and Decision Framework
Complete 3-cloud comparison! AWS/GCP/Azure service 1:1 mapping tables (compute/storage/DB/AI/serverless), pricing comparison, strengths/weaknesses analysis, certification roadmap, multi-cloud strategy, and decision frame
2026-03-23 · 21 min read #aws#gcp#azure#cloud#comparison