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Harwinder Kaur
@harwinder1021
Level 1
Mobile App Developer, Full Stack Developer, AI Expert
United Kingdom
English
About me
Hi, I'm a Mobile App Developer with a proven 7+ years track record of creating dynamic mobile apps. I specialize in taking your vision and building the mobile app that will spread like wildfire across the digital landscape.
My expertise includes Flutter, React Native, Android, iOS, and full-stack app development, with successful projects across industries like fitness, dating, food delivery, taxi booking, ecommerce, fintech, medical and more.
Focused on innovation, performance, and reliability, I’m here to bring your vision to life with solutions that truly deliver value.
#mobileapp #AIapp
Skills
Harwinder Kaur
$30/hour
Offline •
Average response time: 4 hours
See my services
Cross-Platform Development
I will do ai mobile app development ios and android app development
Full Stack Web Applications
I will laravel, php laravel developer, web app development, laravel developer
Want to work on an hourly basis?
Tell Harwinder Kaur what you need.
$30
/
hourPortfolio
Work experience
Mobile App & Full Stack Developer
Fiverr
Feb 2026 - Present • 3 mos
Working as a Freelance Mobile App & Full Stack Developer delivering high-quality solutions to global clients. Specializing in custom mobile apps, web applications, SaaS platforms, and MVP development. Key Responsibilities & Achievements: Developed full-stack applications using MERN stack (MongoDB, Express.js, React.js, Node.js) Built scalable mobile apps using Flutter and React Native Designed secure REST APIs and authentication systems (JWT, OAuth) Integrated payment gateways (Stripe, PayPal) and cloud services (AWS, Firebase) Delivered 100% client satisfaction with on-time project delivery Built startup MVPs that scaled to thousands of active users Skills: MERN Stack, Full Stack Development, Flutter, React Native, API Development, AWS, Firebase, SaaS, MVP Development
Senior Mobile App Developer
Revup Design
Jan 2020 - Dec 2025 • 5 yrs 11 mos
Served as Senior Mobile App Developer leading end-to-end mobile development projects using Flutter, React Native, and native technologies. Focused on building scalable cross-platform applications with seamless backend integration. Key Responsibilities & Achievements: Led a team of 8+ developers for mobile and hybrid app projects Developed cross-platform apps using Flutter & React Native Integrated Node.js, Express.js, and MongoDB backends Built real-time applications using WebSockets and Firebase Improved app loading speed by 35% through performance optimization Delivered enterprise-level SaaS and eCommerce mobile applications Skills: Flutter, React Native, Node.js, Express.js, MongoDB, API Integration, Cross-Platform Development,
Mobile App Developer | Ios & Android App Development
Indi Solution
Jan 2015 - Dec 2020 • 5 yrs 11 mos
Worked as a Mobile App Developer specializing in Android (Java, Kotlin) and iOS (Swift) application development. Designed and developed high-performance, scalable, and user-friendly mobile applications for startups and enterprise clients. Key Responsibilities & Achievements: Developed 50+ custom mobile applications from concept to deployment Integrated RESTful APIs, Firebase, payment gateways, and third-party SDKs Implemented clean architecture (MVVM, MVP) and optimized app performance Published and maintained apps on Google Play Store and Apple App Store Collaborated with UI/UX teams to deliver responsive and modern mobile interfaces Reduced app crash rates by 40% through debugging and performance tuning Skills: Android, iOS, Kotlin, Swift, Java, Firebase, REST API, Mobile UI/UX, App Deployment
20 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 20 Reviews
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Most relevant
omar_morales12
United States
Excellent mobile app developer! Fast delivery, smooth communication, and high-quality work. The app runs perfectly with a clean UI. Great value for money, highly recommended for mobile app development and quick fixes. Will work again!
Helpful?
bradcain469
Repeat Client
United States
Excellent mobile app developer! Delivered high-quality work with clean UI/UX design, smooth performance optimization, and quick bug fixing. Communication was clear, delivery was fast, and the app works perfectly on Android and iOS devices. Highly recommend for mobile app development projects.
Helpful?
alex112014
United States
Outstanding work by a highly professional mobile app expert. Communication was clear, updates were implemented quickly, and the delivery was on time. If you need help with Android apps, mobile UI/UX improvements, bug fixing, or responsive design, this seller is very reliable and skilled. Highly recommended for quality mobile app development services.
Helpful?
emily_hawker2
Repeat Client
United States
Outstanding work on my mobile application project! Delivery time was so quick and communication was excellent. Best choice for app development, UI design, bug fixing, and fast turnaround. Highly recommend!
Helpful?
scottsadler19
France
The delivery was super fast and right on time, which I really appreciated. Communication was smooth, and all requirements were handled professionally. The mobile app fixes were implemented perfectly, and everything works as expected. Highly recommend!
Helpful?
