Hire the Best BlackBerry App Development Specialists
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Android Developer | 8+ Years | 1M+ Users Worldwide With 8+ years of Android development experience, I’ve designed, built, and optimized apps trusted by over 1M users globally—including high-impact projects like Getaround and HyreCar. I specialize in writing clean, maintainable code and delivering scalable, high-performance applications with seamless user experiences. As a Top-Rated Plus Freelancer on Upwork, I’ve earned $20,000+ with a 100% Job Success Score, a testament to my reliability, quality, and client satisfaction. Whether you need a new app from scratch or want to enhance an existing one, I ensure performance, scalability, and user delight. 🛠️ Core Skills Languages & Architecture: Kotlin, Java, MVVM, Clean Architecture UI/UX & Interaction: Jetpack Compose, Navigation, Motion Layout, Material Design, Custom Views, Accessibility APIs & Communication: REST, GraphQL, Retrofit, Coroutines, RxJava, Socket.IO Firebase & Cloud: FCM, Analytics, Crashlytics, Remote Config App Publishing & Payments: Google Play Console, In-app Purchases, Stripe, Payment Gateways DevOps & Tooling: Git, CI/CD (GitLab), Docker, Fastlane Advanced Features: Hilt/Dagger, Location Services, Multi-language Support, Offline Handling, Performance Optimization, PDF/Excel Generation 🌍 Industry Experience 🚗 Car Sharing & Rentals: Getaround (1M+ users), HyreCar (500K+ users) 🩺 Healthcare & Wellness: Medicine Reminder, Alzheimer’s Detection, BMI Calculators 🛍️ E-commerce & Marketplaces: Sozer Jewelry, Weat Local Marketplace 🎙️ Media & Streaming: Silvers Radio, Streaming Radio Apps 🏋️ Fitness & Lifestyle: Custom Workouts, Freight Booking (FreightPrint) 🚀 Key Achievements ✔ Integrated advanced SDKs: Stripe (Payments), Mitek (ID Verification), Sendbird (Messaging), Instabug (Bug Reporting) ✔ Automated builds & releases with CI/CD pipelines in GitLab + Firebase distribution 💡 Why Work With Me? 🔹 Strong problem-solving skills – quick and efficient issue resolution 🔹 Proactive communication – clear updates, no guesswork 🔹 Clean code advocate – maintainability & scalability first 🔹 User-first mindset – intuitive, engaging, and accessible apps 🔹 Continuous learner – always up to date with the latest Android trends 📩 Let’s build your next Android app—scalable, performant, and user-friendly.

✔︎ 100% Job Success | 11+ years experience ✔︎ 5M+ $ funding raised by clients ✔︎ 50+ completed jobs | 20M+ app downloads | 20+ published apps ✔︎ 25% productivity increase using GitHub CoPilot and Chat GPT. Among 🌟 top 3% of mobile application developers on Upwork! I have 10+ years of experience developing Mobile applications for iOS and Android platforms. As part of my experience, I've handled many onsite and remote projects for different companies, from small start-ups to large corporations. What I can do: ✅ Planning and implementing the app’s architecture and features. ✅ Writing apps from the very beginning to the App Store and further support. ✅ Server backend API and Web admin panel for the project. ✅ Code Review, Fixing and supporting the apps written by others. ✅ Working with a team of developers or solo. Technologies and framework that I have worked on - * Kotlin • Android • Java • Flutter • Dart • MVVM • MVP • Clean Architecture • Agile * Firebase • Firestore • Stripe • Twillio • OneSignal • In-App Purchase • SQLite • Figma • JIRA * Custom cloud service: Firebase, Firestore, AWS, Parse, Netsuite, XMPP, IBM Watson, Media Wiki. * Blockchain Integration * IPTV * Map/Geolocation: map, MapKit, Mapbox, OpenStreet. * Push notification: APNS(iOS), GCM(Android), One Signal. * Payment Gateway: Stripe, Braintree, CCAvenue, Google Wallet, Bluefin, Citrus * Ads: Admob, Flurry, Chart boost. * Analytics - Google Analytics, Flurry, * Mobile Authentication - Digits * Crash Detection - Fabric's crashlytics * DeepLink Integration - Branch.IO, Dynamic Links - I'm open to working with big and small companies and individual clients. - I'm comfortable signing an NDA. - Prefer long-term collaboration. - Ready to work 30-40 hours per week I have expertise in HealthCare, E-Commerce and On-Demand solutions but I'm open to various projects and would love to show you my creative side too. Thanks for your time Regards Vivek Bansal

Refine my 10+ years of experience in C, C++, C# & VB.NET by solving challenging problems. For the past years I have developed windows driver, created robust solution using C++, C#.NET & windows-api. I have also worked actively in developing various proprietary protocols. The variety of language enables me to develop complete solution from ground up & let me focus on the problem rather than language itself. I like to learn & very dedicated about my work. I am a team player & strongly believe in co-operation in bringing a solution to daylight. My Key Strength - variety of languages - C, C++, C#, VB.NET, Java, Android, PHP database - MSSQL, MySQL core api - windows api, driver development always exercise good practice in coding have a good knowledge of SDLC & project management.

🌟 100% Job Success Ratio 👨‍💻 10+ Years in Mobile App Development 💼 30+ Successfully Completed Projects 🚀 Hello! I'm Vivek, a seasoned Senior Software Developer and passionate tech enthusiast. I'm eager to assist you in crafting top-tier, modular software that aligns with your requirements while prioritizing performance and security. Why to hire me among thousands of other freelancers? I distinguish myself through an unmatched commitment to work quality and professionalism. Establishing trust with clients and fostering effective communication are integral components of my skill set. As a developer, I strive to keep up-to-date with the latest techs from Android and Apple, and use each standard introduced with ease while following the best guidelines in order to make my code readable and maintainable. I thrive on challenges! With a positive mindset, I approach every task with determination, doing whatever it takes and never giving up. IoT & Bluetooth Development: Experienced in Bluetooth Low Energy (BLE), ESP32 firmware development, IoT hardware integration, and AWS IoT services, with a strong focus on enabling smart device connectivity. Skills: ------- ✔ Cross-platform app development, ✔ RESTful API integration, ✔ Android components (Activities, Services, Broadcast Receivers, Content providers) ✔ Fragments API, Intents, etc. ✔ Java Core, Threads, Collections. ✔ Payment and Social media SDKs integration ✔ Firebase, FreshChat, Socket.io for chat-based application ✔ Voice, Chat and Video calling integrations ✔ Google Map, Ads, In-App Purchase, In-App Billing implementation Version control and Issue tracking - Git, Bitbucket - Trello, JIRA My Working pattern: - Following Complete agile methodology - Trello/Pivotal Tracker implementation - Implementation using best architecture patterns But don't just take my word for it – let my work speak for itself. Check out my portfolio to see some of my past projects and success stories. Don't hesitate to reach out! Your project deserves the expertise and commitment that I bring to the table. Thanks, Vivek

Greetings, I am here to materialize your concepts with a blend of advanced technical expertise and creative problem-solving. Specializing in VBA for a diverse range of applications and Java applications for both desktop and Android environments, my skill set is crafted to meet and exceed your technical needs. Why Collaborate with Me? 1. Mastery in Java & Android Development: My journey as an Android developer is marked by immersive experiences in developing robust, efficient, and scalable applications. My expertise is not limited to standalone Java applications. I also excel in enhancing Android applications with server backends, demonstrating proficiency in Amazon Web Services, especially EC2 Amazon Linux 2, and server management through Java JARs. With me, rest assured your project is in capable hands. 2. Comprehensive VBA Utilization: My adeptness in VBA extends beyond generic applications. From Excel and Access to customized applications, I have a rich history of harnessing VBA to revolutionize tasks through automation, refine application performance, and architect solutions that are custom-built for specific business challenges. 3. Innovative Approach to Complex Challenges: My passion lies in confronting and conquering the extraordinary. If you're facing a problem that demands a unique approach or a customized digital solution, I am here to take on the challenge. My approach is rooted in innovative thinking, allowing me to step outside conventional boundaries and deliver solutions that are truly one-of-a-kind. Embark on a journey from concept to reality with a developer who isn’t just accomplished, but also values the vision behind every project. Let’s initiate a conversation about how my expertise can serve as the catalyst for your next success story. Reach out today, and together, we will set the gears in motion!