Randhir S.

I’m a Senior Mobile App Developer with 8+ years of experience building high-performance iOS, Android, React Native and Flutter applications for startups, growing businesses, and enterprises.

I help businesses turn ideas into scalable mobile products, from MVP development and product launches to complex applications requiring custom backend systems, APIs, third-party integrations, and AI-powered features.

📱 What I Build

• Native iOS & Android Applications
• React Native & Flutter Apps
• AI-Powered Mobile Applications
• SaaS & Marketplace Apps
• FinTech Applications
• Healthcare & Fitness Apps
• E-commerce & On-Demand Apps
• Real-Time Chat & Communication Apps
• Location-Based Applications
• IoT & Connected Device Apps
• MVPs & Product Prototypes

🤖 AI & Automation

I also integrate AI into mobile and web products, including:

OpenAI / GPT integrations
Claude AI integrations
AI Chat Assistants
AI-powered mobile features
Generative AI applications
Smart search and recommendations
Workflow automation

⚙️ Technology

• Mobile: React Native, Flutter, Swift, Kotlin, Java
• Backend: Node.js, NestJS, Laravel, PHP, Express.js
• Databases: Firebase, MongoDB, MySQL, PostgreSQL, DynamoDB
• APIs & Integrations: REST APIs, WebSockets, Stripe, PayPal, Razorpay, Twilio, Google Maps, Apple Maps and more.

I also handle backend/API development, third-party integrations, performance optimization, deployment and ongoing support, so you can work with one development partner across the product.

🏆 Why Work With Me
Top Rated Plus on Upwork
99% Job Success
15,000+ Upwork hours
$300K+ earned on Upwork
8+ years of development experience
Experience working with startups, scale-ups and enterprises
Clean, scalable and maintainable architecture
Agile development with regular progress updates

Whether you need to build a new mobile product, modernize an existing application, add AI capabilities, or scale an existing platform, I can help take it from idea to production.