Articles about iOS development, SwiftUI, and software engineering.https://tobiasre.me/https://tobiasre.me/blog/building-high-performance-astro-react/https://tobiasre.me/blog/building-high-performance-astro-react/I used to think SSG and rich interactivity were mutually exclusive. Astro's island architecture let me keep most of the site static and add JavaScript only where it earns its keep.Tue, 24 Feb 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/modern-ios-app-architecture/https://tobiasre.me/blog/modern-ios-app-architecture/A practitioner look at how MVVM, VIPER, and TCA tend to scale in iOS teams, and why team habits matter more than architecture branding.Mon, 09 Jun 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/agentic-development-feedback-loop/https://tobiasre.me/blog/agentic-development-feedback-loop/Agentic development tools didn't replace my workflow — they inverted it. I used to spend 80% of my time writing code and 20% reviewing it. Now the ratio is flipped, and my output is better for it.Mon, 05 Jan 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/ios-instruments-profiling/https://tobiasre.me/blog/ios-instruments-profiling/After years of relying on print statements and Xcode's debugger, I finally went deep on Instruments. Here's the specific workflows that changed how I profile iOS apps — and the three tools every iOS engineer should know cold.Mon, 18 Aug 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/agents-dont-architect/https://tobiasre.me/blog/agents-dont-architect/AI agents can generate a feature quickly. They still usually can't tell you whether you should build it, where it should live, or how it should fit the system. Here's how I think about the architectural work that remains stubbornly human.Sat, 07 Feb 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swift-dependency-injection/https://tobiasre.me/blog/swift-dependency-injection/You do not need a DI framework just to say you use DI. Swift already gives most apps strong defaults, and libraries like swift-dependencies can still be a great fit when they solve real problems.Tue, 14 Oct 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swift-macros-in-production/https://tobiasre.me/blog/swift-macros-in-production/Swift macros shipped in Swift 5.9 and the ecosystem spent a year learning when to use them. Many developers spent that year exploring them — including writing custom macros for production apps. This is what actually works.Mon, 20 Jan 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swift-concurrency-task-lifetimes/https://tobiasre.me/blog/swift-concurrency-task-lifetimes/async/await looks simple until a Task outlives the screen that created it. Here's what I learned the hard way about cancellation, structured concurrency, and the lifetime bugs hiding behind innocent-looking Task blocks.Mon, 07 Apr 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/ios-cicd-fastlane-gitlab-ci/https://tobiasre.me/blog/ios-cicd-fastlane-gitlab-ci/If you want a production-ready iOS release pipeline with Fastlane and GitLab CI, this is a pragmatic setup that balances control, repeatability, and maintenance cost.Mon, 19 Jan 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/kotlin-multiplatform-ios-engineer/https://tobiasre.me/blog/kotlin-multiplatform-ios-engineer/I've been integrating KMP into a production iOS app at my current job to share business logic with Android. Here's what it actually feels like to work with — the good, the surprising, and the places where Swift is still irreplaceable.Thu, 12 Sep 2024 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swiftdata-in-production/https://tobiasre.me/blog/swiftdata-in-production/SwiftData promised to replace Core Data's boilerplate with a modern Swift API. In production, the tradeoffs become clear around schema evolution, query expressivity, and operational risk.Sat, 14 Feb 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swiftui-animations-demystified/https://tobiasre.me/blog/swiftui-animations-demystified/Most SwiftUI animation tutorials stop at .spring(). This one goes deeper — into damping ratios, response curves, and the physics that separate good apps from great ones.Wed, 03 Dec 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swiftui-navigation-stack/https://tobiasre.me/blog/swiftui-navigation-stack/SwiftUI's NavigationStack finally gave us programmatic navigation that works. After a year of production use across three apps, here's everything I wish I'd known from day one.Mon, 15 Apr 2024 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/swiftui-view-rerenders/https://tobiasre.me/blog/swiftui-view-rerenders/SwiftUI's diffing is fast, but it's not free. Here's how @Observable, EquatableView, and the shape of your state graph determine whether your app runs at 60fps or 30fps under load.Mon, 21 Jul 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/tca-state-management-visualized/https://tobiasre.me/blog/tca-state-management-visualized/A practical journey from spaghetti ViewModels to The Composable Architecture, with an interactive visualization of how it actually works under the hood.Mon, 22 Sep 2025 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/testing-agentic-code-trust-framework/https://tobiasre.me/blog/testing-agentic-code-trust-framework/When an agent generates a non-trivial feature quickly, how do you know it's correct? Here's the review and testing framework I use to make generated code production-worthy.Sat, 28 Feb 2026 00:00:00 GMTTobias Reinschhttps://tobiasre.me/blog/writing-good-software-lessons-from-ios/https://tobiasre.me/blog/writing-good-software-lessons-from-ios/Lessons from production iOS work on state management, premature abstraction, and knowing when good enough is good enough.Fri, 14 Mar 2025 00:00:00 GMTTobias Reinsch