Vivek K.
Full-Stack Developer | Web, Mobile Apps & SaaS Development
I help startups and businesses turn their ideas into reliable web applications, mobile apps, and SaaS products. With 14+ years of software development experience, 90+ apps delivered, $100K+ earned on Upwork, and 7,000+ hours worked, I bring both technical experience and a practical understanding of what it takes to build and launch a successful product. I work with clients from the initial idea and MVP stage through development, launch, and ongoing improvements. My focus is on building applications that are easy to use, secure, scalable, and ready for real users. I have worked extensively on healthcare, fitness, wellness, AI, SaaS, fintech, e-commerce, and other business applications, including products that connect with third-party services, wearable devices, payment systems, and cloud platforms. Upwork Highlights -$100K+ earned on Upwork -7,000+ hours completed -100% Job Success Score -Top Rated Freelancer -14+ years of development experience -90+ mobile and web applications delivered What I Can Help With -iOS and Android app development -React Native and Flutter development -Native iOS and Android development -Healthcare and telemedicine applications -Fitness and wellness platforms -AI-powered applications and AI integrations -SaaS and subscription-based products -Admin dashboards and web portals -REST API development and third-party integrations -Payment gateway and subscription integrations -Cloud-based applications -IoT and Bluetooth-connected mobile applications -Existing app maintenance and feature development -Healthcare, Fitness & Wellness Experience I have experience working on products involving health tracking, fitness programs, wellness services, telemedicine, health data, analytics, user progress tracking, and personalized experiences. This includes applications with features such as: -Health and fitness tracking -Workout and activity management -Progress and performance analytics -Wellness programs -Telemedicine and virtual consultations -Health-related dashboards -Wearable and device integrations -Notifications, reminders, and user engagement -AI-based recommendations and personalization -Technologies & Integrations Mobile: Swift, SwiftUI, Kotlin, Java, Flutter, React Native Backend & Cloud: Firebase, AWS, REST APIs AI: OpenAI / ChatGPT, LLM integrations, AI-powered features and workflows Communication: Twilio, Agora Payments: Stripe, Braintree and other payment gateways Engagement & Analytics: OneSignal, Mixpanel, SendGrid Other: Google Maps APIs, AWS Transcribe, third-party APIs, secure authentication and device integrations Selected Projects -Healthcare: Cura4U, Medicover -Fitness & Wellness: TransformFitAI, Mywellness -AI: Kai AI Tool, UniBee AI Tool -Food Delivery: 1 Time Shop Delivery App Industries Healthcare | Fitness & Wellness | AI & SaaS | FinTech | Blockchain & Web3 | E-commerce | Food Delivery | Transportation | Events & Ticketing | CRM & ERP | Education Why Clients Choose Me -Clear and regular communication -Practical technical approach -Clean and maintainable development -Focus on performance, security, and scalability -Experience working with existing codebases as well as new products -Reliable testing and deployment process -Post-launch support and maintenance Comfortable working as an individual developer or as part of an existing team If you have an existing application that needs improvements or a new product that needs to be built from the ground up, I can help with the technical development and take it through to production. 🔹 Specializations Mobile App Development • iOS Development • Cross-Platform Mobile Apps • Flutter App Development • React Native App Development • Mobile App Architecture • API-Driven Mobile Apps • AI Powered Applications • OpenAI Integration • LLM Integration • AI Workflow Automation • AI Systems Architect • AI SaaS Developer • SaaS MVP Development • Polymarket • Kalshi • Healthcare • Fitness • Wellness • Wearables • Internet of Things • BLE Devices