Half the Cycle: Vibe Coding Vol 2 - Backend Practice: Signup, Board CRUD, API, Files, Search, and CI/CD - Ship Real Backends with Claude Code

By YOO BYUNG HONG

Real Backends. Real Requirements. Half the Cycle.

Your Vol 1 setup is beautiful. Now your PM drops a real spec: "Signup with email verification, a board with pagination and search, file uploads to S3, an async job that indexes into Elasticsearch, and please have it in staging by Friday." Vibe Coding either becomes a superpower here - or it dies at the first N+1 query. This is Volume 2 of the Half the Cycle: Vibe Coding series - the field guide to shipping real backend features end-to-end with Claude Code.

Why Backend Needs Its Own Volume

Because "give me a signup API" produces plausible code that dies the moment you add rate limiting, email verification, and JWT rotation. This book is 15 chapters spanning requirements to canary deploy - Signup, Board CRUD, Files, Search, Async, Performance, Security, CI/CD - with the exact Vibe Coding prompts, test patterns, and PR checklists that get real backends shipped.

Five End-to-End Feature CyclesSignup & Auth: requirements → domain → API → JWT/OAuth → integration testsBoard CRUD: entity/DTO/repo → paging (offset vs cursor) → search + filter combosFiles: local, S3, signed URLs - with the async processing pipelineSearch: full-text (Elasticsearch) + vector (Milvus) - when each wins, how they composeAsync: Kafka, Redis Queue, cron - retry policies, dead-letter queues, monitoringProduction-Grade Finish in 5 PartsPart 1: Backend Vibe Coding fundamentals - why testability is the multiplierPart 2: Signup & Auth end-to-end (Spring Boot - FastAPI - Express)Part 3: Board CRUD end-to-end - the pattern you'll reuse for every resourcePart 4: Files, search, async - the "not just CRUD" partsPart 5: Performance (N+1, indexing, caching), security (SQLi, XSS, CSRF), CI/CDReal Numbers From Real BackendsFeature completion time: measured Vibe-Coded vs traditional - down 52%Test coverage from first pass: >80% with test-first prompting patternsN+1 detection: catches every regression before merge with the audit skillSecurity review checklist: 12 items, run automatically as a subagentWhat You'll BuildA signup service with email verification, JWT rotation, and rate limitingA board CRUD with pagination, filters, and hybrid search - reusable patternA file pipeline: upload → S3 → async indexing → search-readyA monitoring stack that alerts before your users noticeA CI/CD pipeline (GitHub Actions) from lint through canary - copy-paste workingWho This Book Is ForBackend engineers who Vibe-Coded a prototype and don't know how to make it survive productionFull-stack devs whose backend is the weak linkTech leads defining "how we use Claude Code" for a backend teamAnyone who's watched an AI-generated backend fail a load test at 100 concurrent usersWhat Makes This Book Different

Every "AI builds a backend" post ends at "and it works locally." This book ships to prod. Every recommendation carries a working example: exact prompts, exact test patterns, exact deploy config. Type what's in the book - it runs at 10K users, not just 10.

Prerequisites

Comfortable with one backend framework (Spring Boot, FastAPI, or Express). Basic SQL. Vol 1 (Setup Complete) recommended but not required - Chapter 1 recaps the Vibe Coding fundamentals.

The Series

Vol 1: Setup Complete - Vol 2: Backend Practice (this book) - Vol 3: Frontend Practice. Read Vol 1 first, or standalone if you already have Claude Code set up.

Stop treating "put it in prod" as an exercise. Ship the backend, monitor what matters.

• Format: Paperback
• Language: English
• ISBN: B0HDL7FN7R
• ISBN13: 9798191437255
• Release Date: August 2026
• Publisher: Independently Published
• Length: 192 Pages
• Weight: 0.58 lbs.
• Dimensions: 0.4" x 6.0" x 9.0"