Programming Hard publishes practical, opinionated articles on Android and Kotlin app development, with a focus on testing and Gradle build setup. Each issue works through code examples to explain why common practices cause problems and what to do instead.

Explains system design concepts and engineering case studies from large companies, such as how Uber built its Genie support assistant and why Shopify moved off React Native. Each issue breaks a topic into a structured walkthrough based on publicly shared details, with diagrams and references.

A solo developer's newsletter about building and shipping mobile apps for Rails with Hotwire Native and his product Ruby Native, alongside candid notes on running a one-person business. Readers get product milestones, technical opinion and personal updates on sustainable solo work.

Technical explainers on digital identity wallets and verifiable credentials, covering proximity verification, NFC device engagement in ISO 18013-5, and SD-JWT selective disclosure. Readers get clear mental models of how the protocols work and what implementers must handle.