Hi, I'm Ayush Kumar, a passionate Full Stack Web & Software Developer specializing in building modern websites, web applications, SaaS platforms, and custom business software solutions.
I help startups, entrepreneurs, and businesses create powerful digital products that drive growth and improve efficiency. Whether you need a professional business website, an e-commerce platform, a custom CRM, or a complete software solution, I can deliver scalable and user-friendly applications tailored to your requirements.
My focus is on clean code, responsive design, security, performance optimization, and delivering projects on time.
What I Can Help You With
✅ Custom Website Development
✅ Full Stack Web Application Development
✅ SaaS Platform Development
✅ E-Commerce Websites
✅ CRM & ERP Solutions
✅ Admin Dashboards & Portals
✅ Startup MVP Development
✅ API Development & Integration
✅ Database Design & Management
✅ Business Automation Software
✅ Website Maintenance & Support
✅ Cloud Deployment & Hosting Setup
Tech Stack
Frontend:
• HTML5, CSS3, JavaScript
• React.js, Next.js
• Bootstrap, Tailwind CSS
Backend:
• Node.js, Express.js
• PHP, Laravel
Database:
• MySQL, MongoDB
CMS & Tools:
• WordPress
• Git & GitHub
• REST APIs
• Cloud & VPS Hosting
Why Work With Me?
✔ Professional Communication
✔ High-Quality Development Standards
✔ Scalable & Secure Solutions
✔ On-Time Project Delivery
✔ Long-Term Technical Support
✔ Client Satisfaction Focused
Let's Connect
If you're looking for a dedicated developer for your website, web application, SaaS platform, or custom software project, feel free to send me a message. I look forward to working with you and bringing your vision to life.
Full-Stack Development
Web Development
Software Development
WordPress Development
WordPress e-Commerce
API Integration
SaaS Development
Shopify
CRM Development
ERP Software
HTML5
Mobile App
JavaScript
React Native
Next.js
Back-End Development
Front-End Development
Front-End Development Framework
Back-End Development Framework
Vivek K.
Mohali, India
$20/hr
4.8
121 jobs
🎓 With 14+ years of experience in software development, I help startups and businesses build production-ready mobile applications (Custom/Hybrid) that are scalable, secure, and designed for long-term growth.
Whether you're building an MVP, a healthcare platform, an AI-powered application, or a SaaS product, I can take your idea from planning and architecture to App Store and Google Play deployment.
🏆 Upwork Highlights
➜ $100K+ Earned on Upwork
➜ 7,000+ Hours Completed
➜ 100% Job Success Score
➜ Top Rated Freelancer
➜ 14+ Years of Industry Experience
➜ 90+ Mobile & Web Applications Delivered
💡 What I Do
I work across the complete product lifecycle, from product planning and architecture to development, deployment, and long-term maintenance. My focus is on building reliable, scalable, and user-friendly applications that deliver real business value and continue to evolve as businesses grow.
⚡ Areas of Expertise
✔ Native iOS & Android App Development
✔ Cross-Platform Development (Flutter & React Native)
✔ AI-Powered Mobile Applications
✔ SaaS Product Development
✔ Healthcare & Telemedicine Solutions
✔ Fitness & Wellness Applications
✔ Admin Panels & Web Portals
✔ API Development & Third-Party Integrations
✔ Cloud-Based Applications
✔ Business Process Automation
🛠 Technologies & Integrations
I have hands-on experience working with:
• Swift, SwiftUI, Kotlin, Java
• Flutter & React Native
• OpenAI (ChatGPT), AI Agents & LLM Integrations
• Firebase
• Twilio
• Agora
• Stripe & Braintree
• OneSignal
• Mixpanel
• SendGrid
• AWS Transcribe
• Google Maps APIs
• REST APIs & Third-Party Integrations
• Secure Authentication & Payment Gateways
Featured Projects
📱 Healthcare: Cura4U, Medicover
💪 Fitness: TransformFitAI, Mywellness
🤖 AI: Kai AI Tool, UniBee AI Tool
🍔 Food Delivery: 1 Time Shop Delivery App
🌍 Industries I've Worked With
→ Healthcare
→ Fitness & Wellness
→ AI & SaaS
→ FinTech
→ Blockchain & Web3
→ Food Delivery
→ Transportation
→ Event & Ticketing
→ E-commerce
→ CRM & ERP
→ Education & E-Learning
🤝 Why Clients Work With Me
▶️ Clean, scalable, and maintainable code
▶️ Strong communication throughout the project
▶️ Secure and production-ready architecture
▶️ Daily progress updates
▶️ Reliable post-launch support
▶️ Long-term technical partnership
▶️ Focus on business outcomes, not just development
Whether you're building an MVP, modernizing an existing application, or launching a new mobile product, I can help you design, develop, deploy, and scale a reliable solution built for long-term success.
🔹 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
React Native
Mobile App Development
SaaS Development
AI App Development
JavaScript
Flutter
Internet of Things
ChatGPT
Android App
Swift
iOS Development
User Authentication
Android App Development
Claude
Payment Gateway Integration
Twilio API
Mobile App
Streaming Platform
GPT-4 API
Raju S.
Jaipur, India
$15/hr
4.2
14 jobs
I'm a Full Stack Developer with 8+ years of experience helping startups and scaling businesses ship production-ready web and mobile products. I've delivered 10+ projects on Upwork, logged 1,500+ hours. I specialise in Laravel, Flutter, and React Native, and back every engagement with a 100% refund guarantee if I set the wrong expectation and can't deliver.
I design and develop scalable digital products across web and mobile, everything from SaaS platforms and marketplaces to fintech apps and AI-powered systems. Whether you need a robust Laravel backend, a cross-platform Flutter app, or a React Native mobile solution, I architect solutions with performance, security, and long-term maintainability in mind. Clients come to me when they want clean code and reliable delivery, not just a freelancer who disappears after go-live.
I've worked with US-based clients across industries, including Real Estate, Solar Energy, and SaaS.
For MyClientWave, an all-in-one CRM for marketing agencies based in New York, I built a DocuSign-like e-signature system entirely from scratch, eliminating their dependency on third-party tools and saving high recurring costs. I also engineered a solar design feature that uses LiDAR data to generate 3D models of a client's house, calculate the optimal sunlight path across the roof, and recommend the best panel placement, a genuinely complex geospatial and data-engineering challenge delivered end-to-end.
For HouseJet, a US real estate platform with 25,000+ happy homeowners and 1,200+ expert agents, I built core features of a property search and listing platform connecting buyers, sellers, and local agents across the United States. If you're looking for a developer who can take on technically demanding, product-critical features and deliver them reliably, that's exactly what I do.
Unlike most developers who just execute tickets, I treat your product like my own. I ask the right questions upfront, flag architectural risks before they become expensive problems, and communicate proactively throughout the project. My long-term client retention rate on Upwork reflects that approach most clients return for their next build.
✅ I have experience building:
- SaaS Platforms (Laravel + React/Next.js)
- Mobile Apps (Flutter & React Native — iOS & Android)
- Marketplace & E-Commerce Platforms
- CRM / ERP Systems
- AI Agents, Chatbots & RAG Systems
- Fintech & Payment Gateway Integrations
- REST APIs & Third-Party Integrations
- Custom E-Signature & Document Workflow Systems
- Geospatial & LiDAR-Based Data Features
- Real Estate Platforms & Property Search Engines
✅ My core tech stack:
- Backend: Laravel, Node.js, Nest.js
- Frontend: React.js, Next.js, Vue.js
- Mobile: Flutter, React Native
- AI/ML: OpenAI, LangChain, RAG Pipelines
- Databases: MySQL, PostgreSQL, Firebase, Supabase
- DevOps: Docker, CI/CD, AWS, DigitalOcean
Thanks for taking the time to read this. I have a 100% success score on Upwork, it's because I get it right the first time, or I'll work for free until you're happy. If your project needs a developer who takes ownership, not just instructions, send me a message and let's talk.
Full-Stack Development
Web Development
Mobile App Development
SaaS Development
API Development
AI Development
Software Architecture
Chatbot Development
Laravel
Flutter
React Native
PHP
JavaScript
RESTful API
Web Application Development
Node.js
OpenAI API
Database Design
Vue.js
Jash R.
Ahmedabad, India
$20/hr
5.0
3 jobs
🚀 Full Stack Web & Mobile App Developer | AI & Automation Expert | 7+ Years Experience
I help startups, enterprises, and funded businesses build scalable digital products with modern Web, Mobile, AI, and Automation technologies.
Over the last 7+ years, I have worked on Healthcare, Fintech, E-commerce, Marketplace, and AI-driven platforms, delivering secure and scalable solutions used by millions of users.
✅ What I Bring to the Table
✔️ Full Stack Web & Mobile App Development
✔️ AI LLM Integration & Custom AI Agents
✔️ RAG (Retrieval Augmented Generation) Systems
✔️ Enterprise Workflow Automation
✔️ End-to-End Product Development
✔️ Scalable Cloud Architecture
✔️ API & Webhook Development
✔️ Startup MVP to Enterprise Scale Delivery
👨💻 Leadership & Delivery Experience
I work as a Lead Developer and Project Delivery Consultant, helping clients manage the full product lifecycle, from planning and architecture to deployment and scaling.
I lead a team of 20+ developers, designers, and QA engineers, enabling faster execution and reliable delivery for complex projects.
We specialise in building custom software solutions aligned with real business goals.
📈 Scalability & High-Traffic Systems
✔️ Vertical & Horizontal Application Scaling
✔️ Microservice & Cloud-Based Architectures
✔️ Experience managing platforms with millions of users
✔️ Performance optimisation for enterprise-grade applications
🏥 Healthcare Technology Expertise
✔️ rPPG-Based Face Scan Implementation
✔️ Telehealth & Doctor/Patient Applications
✔️ Remote Patient Monitoring (RPM)
✔️ Chronic Care Management (CCM)
✔️ Wearables Integration like: Fitbit, Garmin, Apple, Health, Google Health, Withings
💳 Fintech Solutions Experience
✔️ Small Business Loan Onboarding Systems
✔️ Background Verification Workflows
✔️ AML (Anti Money Laundering) Risk Flagging
✔️ Machine Learning (ML) based Fraud Detection
✔️ Distributed Peer-to-Peer Micro Financing Platforms
🤖 AI Agents, LLM & RAG Expertise
✔️ Custom AI Agent Development
✔️ Enterprise AI Workflow Automation
✔️ On-Premise AI Server Deployment
✔️ OpenAI / ChatGPT API Integration
✔️ Gemini & Claude API Integration
✔️ Deepgram Voice AI, TTS & STT
✔️ Custom Knowledge Base Systems
✔️ RAG Architecture & Vector Database Implementation
⚙️ ERP & Automation Solutions
✔️ Custom ERP Development
✔️ Selenium & Puppeteer Automation
✔️ n8n Workflow Automation
✔️ API Integration & Webhook Systems
✔️ Process Automation for Business Operations
🛠️ My Goal
To build reliable, scalable, and future-ready products that help businesses automate operations, improve user experience, and grow faster with technology.
If you are looking for a long-term technology partner who understands both engineering and business execution, let’s connect.
Artificial Intelligence
Mobile App
iOS Development
App Development
Web Application
PHP
MySQL
AWS Development
Cybersecurity Management
React
Web & Mobile Design Consultation
ERP Software
CRM Development
Ecommerce Development Consultation
Healthcare IT
Harinder S.
Khanna, India
$10/hr
4.9
52 jobs
I am a Senior Full-Stack Developer with 10+ years of proven experience building scalable, secure, and high-performance web and mobile applications for startups, SaaS companies, and enterprise organizations. My expertise spans the entire software development lifecycle—from architecture and UI/UX implementation to backend systems, cloud deployment, and ongoing maintenance.
In addition to traditional software engineering, I leverage modern AI technologies and leading Large Language Models (LLMs) such as ChatGPT, Claude, Gemini, and other AI-powered development tools to accelerate delivery, improve productivity, automate workflows, enhance user experiences, and build intelligent AI-driven products.
## 💼 Technical Expertise
### Frontend Development
* React.js
* Vue.js
* Angular
* JavaScript (ES6+)
* TypeScript
* HTML5, CSS3
* Tailwind CSS
* Responsive & Cross-Browser Development
### Mobile App Development
* React Native (iOS & Android)
* Ionic Framework
* Native Device Integrations
* App Store & Google Play Deployments
### Backend Development
* Node.js
* Express.js
* REST APIs
* GraphQL
* Microservices Architecture
* Real-Time Applications
### Databases & Cloud
* PostgreSQL
* MySQL
* SQLite
* Firebase
* Supabase
* Cloud Storage & Serverless Solutions
### AI & Automation
* OpenAI (ChatGPT / GPT Models)
* Anthropic Claude
* Google Gemini
* AI Chatbots & Virtual Assistants
* Prompt Engineering
* AI Workflow Automation
* Retrieval-Augmented Generation (RAG)
* AI-Powered Content & Business Tools
* Custom LLM Integrations
* AI API Development & Deployment
### Integrations
* Twilio
* WebRTC
* Payment Gateways (Stripe, PayPal, etc.)
* Third-Party APIs
* Authentication & Authorization (JWT, OAuth, SSO)
### DevOps & Deployment
* Docker
* CI/CD Pipelines
* NGINX
* VPS & Cloud Hosting
* Linux Server Administration
* Production Monitoring & Optimization
## 🚀 What I Deliver
✔️ Clean, maintainable, and scalable code architecture
✔️ Modern, responsive, and pixel-perfect user interfaces
✔️ High-performance web and mobile applications
✔️ AI-powered solutions that increase efficiency and reduce operational costs
✔️ Robust backend systems and API integrations
✔️ Deep debugging, optimization, and problem-solving expertise
✔️ Clear communication, transparency, and reliable delivery
✔️ Business-focused development that drives measurable results
Whether you need a complex SaaS platform, a mobile application, an AI-powered product, custom automation workflows, or a full-stack solution from concept to deployment, I can help transform your ideas into scalable, production-ready software.
Ionic Framework
Push Notifications
TypeScript
React Native
Angular
Firebase
SQLite
React
Google Maps API
Redux
Vue.js
Next.js
NestJS
Sass
Laravel
Mihir B.
Surat, India
$10/hr
5.0
16 jobs
👋 Hello, I'm Mihir Bhojani, a Full-Stack Developer | Web, Mobile & AI Solutions
With 6+ years of experience, I help startups and growing businesses turn ideas into digital products that actually hold up at scale, from early-stage MVPs to platforms used by thousands of people daily. I handle the full development cycle myself, so you are not stuck managing five different freelancers who don't talk to each other. 🎯
🚀 Core Expertise
✅ Full-Stack Web Development
React.js, Next.js, Node.js
Custom Web Applications
SaaS Platforms
Admin Dashboards & Portals
Enterprise Solutions
📱 Mobile App Development
Flutter (iOS & Android)
Cross-Platform Applications
Firebase Integration
Real-Time Features
Push Notifications
☁️ Backend & Cloud Solutions
REST APIs & Third-Party Integrations
Authentication & Security
Database Architecture
AWS, Firebase & Cloud Services
Scalable Infrastructure
🤖 AI & Automation
ChatGPT Integration
AI Assistants & Chatbots
Workflow Automation
Content Generation Systems
Smart Business Applications
💼 What You Can Expect
✔️ Clean & Maintainable Code
✔️ Scalable Architecture
✔️ Fast Communication
✔️ On-Time Delivery
✔️ Business-Oriented Solutions
✔️ Long-Term Support
I care about whether what I build actually moves the needle for your business, more users, smoother operations, fewer manual processes eating up your team's time. 📈
📩 Drop me a message or invite me to your job, I usually respond within a few hours and I am happy to hop on a quick call to discuss your project before you commit to anything.
Let's talk!
Mobile App Development
AI Mobile App Development
AI App Development
Hybrid App Development
Native App Development
Android App Development
iOS Development
Flutter
Large Language Model
Google ML Kit
Dart
Firebase
CI/CD
Kotlin
Stripe SDK
Agora Voice SDK
Python
FastAPI
Django
Flask
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