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.

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.

A developer's personal newsletter covering Kotlin, mobile development and open source, including release announcements for his own projects like Metro and kempt. It also includes first-person reflections on career decisions such as leaving Slack and taking a sabbatical.