Developed Over 20 Apps
Published Flutter Author
Brian Kayfitz has written the Flutter Cookbook, which is co-authored Simone Alessandria, is a practical guide to building cross-platform applications with Flutter and Dart. Through more than 100 hands-on recipes, it covers UI development, state management, APIs, data persistence, animations, Firebase, testing, debugging, and deploying apps across mobile, web, and desktop.
5 Star Reviews on CodeMentor
“Brian is an expert!!! super helpful! it took him 10 minutes to fix something I have been battling for two weeks in Xcode. I highly recommend!” – Jake C.
“Very helpful and patient. Really fast at debugging and getting to the goal” – Matthew S..
“I have recommended Brian to anyone that is looking to build an app. He has not only helped fixed an app from previous developer but also helped identify ways to make the app more appealing to users.” – Joy W.
“My game was redone in Flutter in under 3 weeks. We have instantly seen a huge improvement in retention, and our crash rate has decreased to below 0.01%.” – Michael O.
TechStack:
- Languages: Dart, Swift, Kotlin, Java, SQL, Objective-C, C#, JavaScript, CSS, HTML
- Frameworks: Flutter, UIKit, SwiftUI, Android SDK, Spring Boot, Unity, Node.JS, Django
- Services: AWS, Azure, Firebase, BigCommerce, Google Cloud, Stripe, Shopify, Sentry, RevenueCat, Google Analytics
Services Offered By Brian Kayfitz
MVP App Development Services
To minimize investment and have a prototype ready for investors, an MVP (Minimum Viable Product) is recommended. Brian, a mobile app developer for hire, can help get your basic MVP app into the stores within weeks or months.
Mobile App Development Services
Brian offers mobile app development services and can help either build your app ideas or finalize an existing app. He has developed apps in Dart, Objective‑C, Swift, Kotlin, and Java. He has built over 20 apps that are live on the App Store and Google Play Store.
Training App Development
Brian has been an app mentor for over four years. He has helped train teams of up to 50 through code reviews, best‑practice tips, and by helping solve specific bugs and issues.
Mobile App with AI
Whether you have an AI agent that is already built or need to build a custom AI agent for a mobile app, Brian Kayfitz has done both. From custom LLM models integrated into Flutter UIs to integrating existing agents into mobile apps, he has you covered.
Modernizing Your App From Native to Cross Platform
If you have native apps and are maintaining two codebases for Android and iOS, it’s time to upgrade to Flutter. As a senior Flutter freelancer, Brian can help not only transition your app to flutter but also train your developers in Dart and the Flutter framework.
Mobile App Strategy Services
Having a successful app in the App Store or Google Play Store takes more than just great technology. It involves understanding your users, keeping your app up to date, and marketing. Brian offers mobile app strategic consulting services to help ensure the best outcome for your app in terms of its tech stack and architecture. He also partners with a marketing agency for ASO and App Store (and Google Play) product pages.
App Code Review Services
App code review services are available for the following languages: Objective‑C, Swift, Java, and Dart.
Unity Game Development
Today, you can create games using Unity or Flutter. For something simple like the math puzzle game Honeycomb Math, Flutter is sufficient. But for more sophisticated apps such as Dragon’s Lair, Unity may be required. Regardless of your game idea or technology choice, Brian Kayfitz can develop the right game with the highest quality.
How can Brian help?
About Brian Kayfitz
Brian Kayfitz has over 10 years of mobile development experience, working with both small startups and major corporations generating billions in revenue. He began his career in game development, contributing to the classic game Dragon’s Lair. When iOS launched, he joined a startup to develop a social media app designed for families.
He later joined BMO, a leading Canadian bank, where he worked on InvestorLine, an investment app. After launching that app, he moved on to Cara, a restaurant company, where he developed the Swiss Chalet mobile app.
In 2020, Brian decided to leverage his experience and knowledge to help other startups and established businesses with their mobile app development needs. As a mobile app freelancer, he has developed several of his own apps, including Visited, a travel app with over 2 million users worldwide, available in 30 languages on both the App Store and Google Play.
Brian has built over 20 apps currently live on the App Store and Google Play. His experience covers industries such as fintech, travel, fitness, restaurants, and social media. He understands that creating a successful app requires more than just great code—it involves understanding user needs, maintaining the app over time, and effective marketing strategies.
He is passionate about mobile app development and eager to help developers and entrepreneurs bring their ideas to life. His technical expertise spans a wide range of technologies, including native iOS and Android, as well as cross-platform development using Flutter.
Brian has also launched several MVP (Minimum Viable Product) apps such as X-Walk, a Nordic walking app; Debt Free, a financial app that helps users manage and eliminate debt; and The Fertility App, designed to support couples navigating fertility treatments.
As a mobile app consultant, Brian has helped clients build, refine, and scale their mobile apps. He trains and mentors development teams and offers strategic consulting to improve app outcomes and performance.
He provides strategic mobile consulting services, focusing on app architecture, technology stacks, and partnering with a marketing agency to optimize ASO (App Store Optimization) and product pages on the App Store and Google Play.
If you’re preparing a prototype for investors, Brian can help you quickly bring an MVP to life and into app stores within weeks or months. If you’re currently maintaining two separate code bases for Android and iOS, now is the time to migrate to Flutter—and Brian can guide you through that process efficiently.
As a senior Flutter freelancer, he not only transitions apps to Flutter but also trains development teams in Dart and the Flutter framework. He has built multiple apps in Flutter, trained Flutter development teams, and co-authored a Flutter Cookbook.
If your native app is written in Swift or Objective-C, Brian can help maintain, improve, or transition it to Flutter. Likewise, if your app is built in Java or Kotlin, he can assist in adding features, optimizing performance, or rewriting it in a cross-platform framework.
Brian has been an Android freelancer for over five years and has the experience to help bring your app vision to life—whether you’re starting from scratch or need expert support along the way.
Recently, he has been integrating LLM models into mobile apps. Having AI-powered technology inside mobile apps can improve their functionality, efficiency, and maintainability. From simple backend Python integrations with front-end Flutter to custom LLM models, Brian Kayfitz is the right mobile app and AI integration freelancer for your project.
