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Hire the best Kotlin Developers in Ohio

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  • $80 hourly
    • 5.0/5
    • (2 jobs)
    Matthew has over 10 years of hands-on experience in iOS & Android platforms. He's proficient in native development for iOS using Swift and Objective-C, as well as Android development using Java and Kotlin. He's also skilled in creating cross-platform applications using frameworks like React Native and Flutter. With a strong background in mobile app development, Matthew has delivered high-quality solutions that meet client needs and exceed expectations. He's also committed to staying updated with the latest technologies and trends in the mobile app industry and he's enthusiastic about learning new technologies and continuously improving my skills.
    Featured Skill Kotlin
    Git
    Mobile App Development
    Android
    iOS
    API Integration
    Android Studio
    Apple Xcode
    Dart
    JavaScript
    Flutter
    React Native
    Java
    Objective-C
    Swift
  • $100 hourly
    • 5.0/5
    • (7 jobs)
    Highly skilled and accomplished Software Engineer with a proven track record of success in designing, developing, and implementing complex software solutions. Bringing over 9 years of full-stack experience in the software development lifecycle, I excel in both frontend and backend technologies, focusing on creating secure systems. I am known for my problem-solving abilities, teamwork skills, rising to challenges, and exceeding expectations. I am confident in my ability to step into the role of a Senior or Lead Software Engineer. While the majority of my experience has been in Java and financial technology, I am currently interested in expanding my experience and skill set to include cybersecurity, data engineering, and machine learning. To that end, I am using multiple self-paced learning strategies to learn Python, refresh my SQL skills, and generally improve my craft. These strategies include websites such as HackerRank, Brilliant, Codility, and Execute Program. I am also working on two personal projects in Python. Throughout my career, I have demonstrated an ability to rise to challenges. In my first year at Chase, I took on fixing a reporting system that had been broken during a tech refresh, and I was able to not only fix the issue but improve the system based on user feedback. Not long after, I was given the task of fixing the hundreds of issues identified by a security scan report, and I built my own tools to organize the issues to communicate with management about the priorities. I not only fixed many of the issues myself but also organized the effort to make sure it was completed, found many of the fixes I did not implement, and eventually became the application security champion, calling out potential issues during code reviews. For both of these, there were no existing subject matter experts on the team, so I had to learn on my own and become that expert. Most recently, in my position at Focused Labs, I stepped up to organize efforts around a major refactor in one of our applications, became the expert on a complicated timeline page in another, and took on the responsibility of point contact with the client of a third application. This last included communicating that changes to this app were not the current priority for our team, but I was still able to keep the client happy by agreeing to take on a small amount of work that would help them increase sales by offering a promo code.
    Featured Skill Kotlin
    Back-End Development
    Software Development
    Bash
    Linux
    Problem Solving
    TypeScript
    Gradle
    Full-Stack Development
    Agile Software Development
    Git
    Spring Framework
    Python
    SQL
    Java
  • $80 hourly
    • 5.0/5
    • (84 jobs)
    Are you looking for end-to-end development of a mobile or web app that truly stands out? I’m your one-stop shop for high-quality solutions—from concept and design to deployment and beyond. 💼 Why Work With Me? • 100% Satisfaction Guarantee – I stand behind my work. If it doesn’t meet your requirements, you don’t pay. • Full-Stack Expertise – Native iOS (Swift, SwiftUI), Android (Kotlin), Flutter, React Native, WordPress, Node.js, and more. • E-Commerce & Service-Sector Focus – Specialized in building e-commerce platforms (Shopify, WooCommerce, Webflow) and service-based apps for higher conversion rates. • Top-Notch UI/UX – Skilled in Figma, creating intuitive interfaces that engage users. • Transparent Communication & Timely Delivery – Regular project updates, easy communication, and reliable timelines. 🎯 Services Offered • Mobile App Development – iOS, Android, Flutter, React Native • Web Development – WordPress, React, Node.js, AWS, GCP, Serverless • UI/UX Design – Wireframing, prototyping, user flow mapping • API & Integrations – AWS, Firebase, Payment Gateways, Third-Party Services • Advanced Technologies – AI & Machine Learning (OpenAI, ChatGPT-4, DALL-E, Jukebox), OCR, Custom Vision 🌐 Industry Experience • E-Commerce (Retail, Grocery, SaaS, B2B/B2C) • Streaming Services (Audiobooks, Video) • Social Networks & Talent Marketplaces • Real Estate & Construction Management • Booking & Event Services • Legal & Law, Wellness & Coaching ⭐ Featured Projects • Wahlbeck: Sci-Fi audiobook streaming app leveraging advanced AI tools. • CSA: A custom research platform with audio visualizations. • Roofworx: An end-to-end roofing contractor service platform. • Floater: Talent placement app connecting employers and professionals. • BK Questionnaire: A legal service tool using OCR technologies. 🔧 My Process 1️⃣ Discovery Call – We’ll discuss your project vision and requirements via Zoom. 2️⃣ Project Blueprint – You’ll receive a clear plan detailing timelines, milestones, and tech stacks. 3️⃣ Design & Development – Crafting the UI/UX and developing a robust backend system. 4️⃣ Testing & Feedback – Gathering insights, iterating quickly, and ensuring high-quality standards. 5️⃣ Deployment & Support – Seamless launch, plus ongoing maintenance and feature updates. 🤝 Let’s Connect Ready to turn your vision into reality? Message me to schedule a quick chat or Zoom call. I’d love to learn about your project and see how I can help. Invite me now, and let’s create a mobile or web solution that exceeds your expectations!
    Featured Skill Kotlin
    Shopify
    Figma
    Stripe
    App Design
    Web Application
    Web Development
    PHP
    iOS Development
    Swift
    Mobile App Development
    React
    Payment Functionality
    Android
    Android App Development
  • $70 hourly
    • 4.9/5
    • (44 jobs)
    - 10 years of experience developing iOS applications using XCode. (Objective - C, Swift, UIKit, and Swift UI) - 10 years of experience developing Android applications using Android Studio. (Java and Kotlin) - 8 years of design experience. (Adobe Suite, Sketch, and Figma) - 5 years experience with backend languages and solutions. (SQL, Java/Type script, AWS, Firebase) I am a passionate full-time freelancer, and I love what I do. I keep open communication, strive to meet deadlines, and love solving issues. From startups looking to build their first MVP to large organizations looking to update their existing apps, I want to go the extra mile to make your project a success! I look forward to hearing from you! Thank You,
 Quentin H.
    Featured Skill Kotlin
    SQLite Programming
    OKTA
    Java
    Swift
    Native App Development
    Map Integration
    Realm Database
    SQL
    Android App Development
    Firebase
    Camera
    Android
    Adobe Photoshop
    Adobe Illustrator
  • $60 hourly
    • 5.0/5
    • (7 jobs)
    I've been developing and designing native iOS and Android apps since 2012. I've helped businesses, organizations, and individuals to bring their ideas into reality and reach their goals. I've built variety of apps that use wide range of technologies, such as, controlling bluetooth devices, editing images, connecting to APIs, using maps and location, and more. I'm looking to help you build your app and bring your vision to reality. Here is an outline of type of work and technologies I used in apps: - UI Designs, wireframes, and mockups. - interfacing consumer devices to mobile applications via Bluetooth (BLE) for iOS and Android. - Design Firebase and Firestore backend database. - Firebase Cloud Functions and Messanging. - AWS AppSync and GraphQL APIs. - AWS Amplify backend integration. - Amazon Cognito for identity and access management. - iOS Shortcuts and app intents. - iOS App Clips. - iOS Wallet and Passes. - Story/book-based apps. - Youtube/Facebook video downloader. - Controlling an electronic device from phone via bluetooth. - SQLite and Room: database to store data locally (Android) - Core Data and Realm: database to store data locally (iOS) - RESTful APIs - SOAP: Complex technology for network communications - Machine Learning: Train the app on patterns and shapes to perform actions when it detects them. - Augmented Reality: To show interactive images and info as part of the real world while pointing the camera. - Simple games using SpriteKit. - Image modifications and applying filters. - Chats and related features. - Device motion censoring. - Restaurant/Cafe Menu. - Social media integration and authentication. - In-app purchases. - Payment processors. - Android Widgets. - Push Notifications. - Map Apps: • Google Places API apps. • An app that let users set a reminder point on the map, so when they drive nearby, it'll remind them to do something. • An app to help users search parking spots on the map in San Francisco and make reservations. • An app that let users store voice memos, videos, notes.. etc, and create markers on the map where they were taken. • Uber clone app.
    Featured Skill Kotlin
    Core Bluetooth
    AWS AppSync
    AWS Amplify
    Mobile App Development
    iOS Development
    Bluetooth LE
    Objective-C
    Android App Development
    Swift
    RESTful API
    Firebase
    Java
  • $100 hourly
    • 0.0/5
    • (0 jobs)
    Experienced engineering leader and hands-on technologist with a strong background in full-stack development, platform architecture, and developer experience. Skilled in building scalable systems using Spring Boot, Kotlin, React, GraphQL, PostgreSQL, Kubernetes, and cloud-native services on GCP and AWS. I've led high-performing remote teams, driven cross-functional initiatives, and contributed deeply to system design, performance optimization, and platform consolidation. Passionate about empowering engineers, improving onboarding, and enabling sustainable product velocity through strong infrastructure and thoughtful leadership. I take on a small number of freelance projects outside my full-time role, so I’m selective and focus on delivering meaningful results. I work asynchronously and provide frequent updates, but I'm not available for real-time meetings during the workday.
    Featured Skill Kotlin
    Continuous Delivery
    Scrum
    Scripting
    Product Development
    Kubernetes
    TypeScript
    React
    Amazon Web Services
    Google Cloud Platform
    Spring Boot
    Java
  • $45 hourly
    • 0.0/5
    • (0 jobs)
    Summary * 7+ years of experience in Android, iOS, and cross-platform development across industries like Healthcare and Hospitality industry. * Proficient in Kotlin, Java, and Swift, with expertise in MVVM architecture, Jetpack Compose, Firebase, CI/CD, and third-party integrations. * Skilled in performance optimization and Agile methodologies, ensuring high-quality, scalable enterprise applications. * Extensive experience in mobile app development using Kotlin, Java for Android and Swift, UIKit, SwiftUI for iOS. * Expertise in modern UI design with Jetpack Compose, creating seamless and responsive interfaces. * Strong background in Firebase analytics integration, OAuth authentication, and cloud messaging. * In-depth knowledge of core Android components and advanced architectures like MVVM. * Proven ability to integrate third-party services (Zoom SDK). * Hands-on experience with CI/CD tools (Jenkins and Fastlane, Github Actions) for automated
    Featured Skill Kotlin
    Native App Development
    HTML
    TypeScript
    Java
    GitHub
    CI/CD
    SwiftUI
    Auth0
    Splunk
    Firebase
    Swift
    App Development
    iOS Development
    Android App Development
  • $35 hourly
    • 0.0/5
    • (0 jobs)
    SUMMARY Bilingual computer engineer seeking an opportunity to utilize and grow my skills and experience. Skills and programs include: Japanese Fluency | C | Embedded Programming | C++ | C# | Java | Python | Micro Python | VHDL | GLSL | Bash Script | CMake | NetBeans | Unity | Blender | 3D SolidWorks | Linux | Microsoft Office | MATLAB | Git | Simulink | LAMMPS | Quartus II | OVITO | Visual Studio | Google Colab | Medical Imaging | Signal Processing | Image Processing | Kotlin |Android Studio | QT Creator | Machine Learning / Artificial Intelligence
    Featured Skill Kotlin
    Data Analysis
    Desktop Application
    Android App Development
    Android
    Git
    C++
    C
    C#
    Python
    Software Development
  • $35 hourly
    • 0.0/5
    • (0 jobs)
    I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help.Knows HTML and CSS3, PHP, React,jQuery, Wordpress, and SEOFull project management from start to finishRegular communication is important to me, so let’s keep in touch.
    Featured Skill Kotlin
    Material UI
    Tailwind CSS
    CSS
    HTML
    PostgreSQL
    SQL
    Flask
    React Native
    JavaScript
    WordPress
    TypeScript
    Java
    Python
    React
  • $10 hourly
    • 4.5/5
    • (4 jobs)
    Experience in Mobile development iOS/Android, Flutter, FireBase and AWS amplify cloud service - Over 14+ experience in mobile and web tech stack experience - API and cloud services experience in new app or migration - iOS Native app development from scratch using latest iOS and Xcode - Familiar in core feature like Location, Biometric Login, WebKit to integration hybrid page, MapKit, UIKit, Foundation and TableView, Views, Menu, Collections view, scroll view and Custom UI creation - Flutter/Dart app development to support both iOS and Android Platform - Flutter widget and dependency management to use third-party plugin and HTTPS rest API - FireBase to create API and integration with Native and Hybrid App - Using Firebase to distribute the iOS and Android build distribution - FireBase to implement PNs for iOS and Android - FireBase to use logging and crashlytics - AWS Amplify to manage cloud service to creating Data Model and integrate with Flutter/React Native - AWS Amplify Cognito for user authentication and Profile - AWS DataSync to manage service less mobile and web apps - AWS Dynamo DB and manage files in S3 Storage - Figma Mobile desing to create Flow and wireframe - Experience and involved in SDLC and track the dependency and get the task done until its closure and delivered into store. - Experience in getting the build for Android(APK)/iOS(.ipa) and release for internal and TestFlight distribution - Experience in Functional Testing - Experience in Mobile and Web Automation using Selenium, TestNG, Java client, Maven, Cucumber, Appium, PostMan, TestCase creation and execution - Expert in Jira for issue tracking, Git/Bitbucket to manage the code in version control #iOS #Android #SmartPhone #Swift #Xcode #Java #Kotlin #AndroidStudio #Flutter #DART #ArchitecureDesignPattern #FireBase #AWSAmplify #S3 #Cognito #AppSync #DynamoDB #APK #IPA #AppStoreDistribution #playStoreDistribution #TestFlight #InternalTesting #Automation
    Featured Skill Kotlin
    AWS AppSync
    TestFlight
    Amazon S3
    Mobile App Development
    Objective-C
    Firebase Cloud Firestore
    React Native
    Swift
    Android
    iOS
    AWS Amplify
    Java
    Dart
    Flutter
  • $25 hourly
    • 0.0/5
    • (0 jobs)
    Beginner software engineer who has beginner experience in Java/Kotlin, C, VB.NET, Python, HTML, and more.
    Featured Skill Kotlin
    VB.NET
    SQL
    PHP
    C#
    C++
    C
    HTML
    Java
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