Coding with Claude: A Developer's Playbook
The follow-up to Architecting with Claude: a free, hands-on book for developers using Claude Code, plus Acme Expenses, the open-source app it builds one chapter at a time.
Daniel Wanja · Nouvelles Solutions, Inc
Enterprise Architect
& Lead Developer.
Four decades of turning complex ideas into software that actually ships. I help organisations of all sizes build scalable, robust products — cloud-native web apps in React, TypeScript and Ruby on Rails, and native macOS tools in Swift.
40+ years building software. Google Cloud and Convex.dev architect and developer. 200+ articles written.
Daniel Wanja · Enterprise Architect & Lead DeveloperWhat I do
About Daniel →01
Frontend architecture
React, TypeScript, Next.js and Tailwind, organised as Nx monorepos that teams can actually maintain.
02
Native Apple platforms
Swift and SwiftUI for macOS and iPad — from prototype to notarised, shipped app.
03
Backend & cloud
Ruby on Rails, Convex.dev and serverless — and cloud architecture on Google Cloud, from data model to deployment.
The books
Two free books on building software with Claude: the principles for whoever decides what gets built, and the playbook for whoever builds it. CC BY 4.0, sources on GitHub.
Book · v1.2 · 74 pages
Architecting with Claude
The PrinciplesTwelve principles for designing AI systems that work, for whoever decides what gets built. With a one-page cheat sheet, slides and a best-practices guide.
Book · v2.0 · 105 pages
Coding with Claude
A Developer's PlaybookHow to steer Claude Code on real software, with playbooks for feature slices, APIs, legacy migration, whole-app runs and team rollout, and a checklist for your own repo.
The lab
Each of these apps is an experiment — a deliberate exercise to find the limits of a different AI coding tool (Codex, Claude, Cursor, Bolt) and write up what I learned.
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