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Harwinder Kaur
@harwinder1021
Level 1
Mobile App Developer, React Native, iOS, Android, Full stack
United Kingdom
English
About me
I'm a mobile app developer with 8+ years of experience building high-performance iOS, Android, and cross-platform apps, including AI-powered mobile applications that solve real business problems.
I specialize in React Native, native Android & iOS development, and AI feature integration.
What I deliver:
✦ React Native & native iOS / Android apps
✦ AI-powered features
✦ Real-time apps with chat, maps & payment integration
✦ App Store & Google Play submission
✦ Performance optimization
Clean code. On-time delivery. Clear communication.
Message me with your idea!!
Skills
Harwinder Kaur
$25/hour
Offline •
Average response time: 1 hour
See my services
Cross-Platform Development
I will mobile app development ios and android app development as mobile app developer
Full Stack Web Applications
I will do php laravel developer, laravel developer, web app, ai saas mvp development
Want to work on an hourly basis?
Tell Harwinder Kaur what you need.
$25
/
hourPortfolio
Work experience
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Mobile App & Full Stack Developer
Fiverr
Feb 2026 - Present • 5 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
25 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 25 Reviews
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Most relevant
andrewsantia695
Repeat Client
United States
I highly recommend Harwinder to anyone looking for a reliable, skilled, and responsive mobile app developer. I would definitely work with her again on future projects. What impressed me the most was the timely delivery. The milestone was completed on schedule, and the final result met my expectations...
Helpful?
benjamin_hen02
Repeat Client
Poland
Very skilled developer who understands both mobile development and AI integration. Every milestone was delivered on schedule, and the final app feels polished and production-ready. Highly recommend!
Helpful?
sumitsandal
Repeat Client
Australia
What impressed me most was the delivery time - everything was completed ahead of schedule without compromising quality. Communication was professional throughout the project, and she was responsive. I highly recommend Harwinder to anyone looking for a skilled and reliable mobile app developer. Looking forward to working together again!
Helpful?
joshua_magnus4
Repeat Client
Norway
Working with Harwinder was an excellent experience from start to finish. What impressed me most was her problem-solving ability and commitment to delivering a polished final product. I highly recommend her to anyone looking for a skilled and reliable mobile development expert. I look forward to working...
Helpful?
edie_jones
Repeat Client
United States
I highly recommend this freelancer to anyone looking for professional mobile app development. Thank you for the timely delivery, excellent communication, and outstanding work!
Helpful?
