App engineering and technical consulting by Dhilip R — mobile apps (iOS, Android, Flutter, React Native), AI and Edge ML solutions, cloud architecture, cost optimization and architecture audits.https://953tech.comenhttps://953tech.com/blog/ios-mtls-403-client-certificate-errorhttps://953tech.com/blog/ios-mtls-403-client-certificate-errorWhen an iOS app uses mutual TLS and the backend returns HTTP 403, CFNetwork discards the response and hands you NSURLErrorClientCertificateRequired (-1206). Your certificate is fine — here's why it happens and how to fix it on the server.Sun, 02 Aug 2026 00:00:00 GMTiOShttps://953tech.com/blog/opencode-multi-model-workflowhttps://953tech.com/blog/opencode-multi-model-workflowAssign a different model to every OpenCode agent — a heavy reasoner for planning, a fast model for coding, a mid-tier for review — and wire them into a repeatable plan → build → review → ship loop with agents, subagents, and commands.Sun, 02 Aug 2026 00:00:00 GMTAIDevOpshttps://953tech.com/blog/part1-edge-ml-tflite-modelhttps://953tech.com/blog/part1-edge-ml-tflite-modelBuild a text classification system for bank transactions with TensorFlow, convert it to TensorFlow Lite, and prepare it for on-device deployment on iOS and Android — with synthetic data generation and a CreateML alternative.Fri, 08 Aug 2025 00:00:00 GMTMobileAIhttps://953tech.com/blog/part2-edge-ml-tflite-ioshttps://953tech.com/blog/part2-edge-ml-tflite-iosIntegrate a trained TensorFlow Lite model into an iOS app using Swift — covering model loading, vocabulary import, text preprocessing, and on-device transaction classification.Thu, 07 Aug 2025 00:00:00 GMTMobileAIhttps://953tech.com/blog/part3-edge-ml-tflite-androidhttps://953tech.com/blog/part3-edge-ml-tflite-androidIntegrate a trained TensorFlow Lite model into an Android app using Kotlin — covering model loading, vocabulary parsing, text preprocessing, and on-device transaction classification.Wed, 06 Aug 2025 00:00:00 GMTMobileAIhttps://953tech.com/blog/android-ssl-trust-anchor-fixhttps://953tech.com/blog/android-ssl-trust-anchor-fixHow to safely fix the Android 'Trust anchor for certification path not found' SSL error using a network security config — without trusting all certificates and getting rejected from the Play Store.Fri, 19 Jun 2020 00:00:00 GMTAndroidhttps://953tech.com/blog/azure-yaml-ionic-appshttps://953tech.com/blog/azure-yaml-ionic-appsReady-to-use Azure Pipelines YAML templates for building Ionic mobile apps for both Android (Gradle) and iOS (Xcode), including Capacitor sync and CocoaPods.Thu, 18 Jun 2020 00:00:00 GMTIonicDevOpshttps://953tech.com/blog/ios-export-archive-provisioning-profile-fixhttps://953tech.com/blog/ios-export-archive-provisioning-profile-fixHow to resolve the 'error: exportArchive: No iOS In House profiles for team' or 'No adhoc profiles for team' error when setting up CI/CD with Fastlane or XcodeBuild.Sat, 30 Nov 2019 00:00:00 GMTiOShttps://953tech.com/blog/ios-core-data-missing-objectshttps://953tech.com/blog/ios-core-data-missing-objectsHow to identify and fix mysteriously missing Core Data objects when you have one-to-many relationships without inverse relationships — includes a working demo project.Wed, 27 Nov 2019 00:00:00 GMTiOS