iOS & Mobile App Developer with 12+ years of experience building, scaling, and maintaining production-ready mobile applications using Swift, SwiftUI, React Native, and Flutter.
As a Top Rated Plus freelancer with 100% Job Success, I've completed 50+ projects and 6,000+ hours on Upwork, helping startups, businesses, and established companies turn ideas into reliable, scalable mobile products.
Many apps work well initially but start struggling after launch with crashes, slow performance, scaling issues, and messy code. The root cause is often the architecture. I focus on building and fixing mobile systems that remain stable and scalable as they grow.
I personally lead every project from planning to delivery. For larger scope, I work with my in-house team of 25+ developers across iOS, Android, Web, QA, and DevOps. You get a single point of contact with full execution behind it.
🚀 What I can help you with:
✅ iOS App Development — Swift, SwiftUI, UIKit
✅ Mobile App Development — React Native & Flutter
✅ MVP to Production — Build, launch, and scale mobile products
✅ Existing App Development & Rescue — Fix bugs, crashes, performance and technical debt
✅ App Architecture & Refactoring — Clean Architecture, MVVM, MVC
✅ Performance & Stability — Crash reduction, optimization and scalable codebases
✅ API & Third-Party Integrations — REST, GraphQL, Firebase, payments, maps, analytics
✅ App Store Launch & Maintenance — Testing, deployment, updates and ongoing support
⚙️ Core Development & Features:
✔ Local database (Core Data, SQLite), offline sync
✔ API integration (REST, GraphQL)
✔ Authentication (Apple, Google, OAuth, JWT)
✔ Push notifications (APNs, Firebase)
✔ Background tasks & lifecycle handling
✔ Secure data handling & performance tuning
🔥 Advanced Integrations:
✔ AI integrations (OpenAI, ChatGPT features)
✔ Payments (Apple Pay, Stripe, in-app purchases, subscriptions)
✔ Location services (GPS, MapKit, Google Maps)
✔ Real-time chat & messaging (Firebase, WebSockets)
✔ Analytics (Firebase, Mixpanel)
✔ Media handling (image/video upload, streaming)
🏢 Proven Work:
⭐ Built and maintained a production system running across 150+ stores for Red Swan Pizza
🔗 Extended Capabilities:
✔ Backend coordination (Node.js, Firebase, AWS)
✔ Android development support via team (Kotlin, Jetpack, Room)
✔ Scalable system design for long-term growth
If you're building a new app or scaling an existing one, I can help you choose the right technical direction and avoid costly mistakes early.
👉 Feel free to message me. Happy to review your app or idea before we start.
iOS Development
Mobile App Development
Swift
SwiftUI
React Native
Flutter
UIKit
Objective-C
Apple Xcode
Mobile App Development Consultation
App Development
API Integration
REST API
Firebase
In-App Purchases
Payment Gateway Integration
Push Notifications
Mac OS App Development
AI App Development
Website to Mobile App Conversion
Nitin C.
Noida, India
$29/hr
4.1
9 jobs
🚀 Senior Product Engineer | SaaS, AI & Mobile Apps | Fleet & Logistics ⭐ ⭐ ⭐ ⭐ ⭐
I help startups, businesses, and enterprises turn complex ideas and business workflows into scalable digital products — from product architecture and UI/UX to development, API integration, and production deployment.
With 💼 19+ years of software engineering and product development experience, I bring both technical depth and product thinking to projects where reliability, scalability, performance, and long-term maintainability matter.
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💡 What I Can Build For You
⭐ SaaS & Enterprise Applications:
* Custom SaaS platforms and business applications
* ERP, CRM, workflow, operations, and reporting systems
* Role-based access, approval workflows, dashboards, and integrations
* Multi-tenant and scalable application architecture
📱 Mobile Applications
* React Native applications for iOS & Android
* Native iOS development with Swift / SwiftUI
* API-driven mobile applications
* GPS/location services, maps, notifications, payments, camera, documents, and third-party integrations
🚚 Fleet & Logistics Software
* Fleet management platforms
* Trip, route, vehicle, and driver management
* Live GPS tracking and operational dashboards
* Driver mobile applications
* Delivery, POD/CRD/LR, fuel, maintenance, and workshop workflows
* Logistics and transportation automation
🤖 AI-Powered Business Solutions
* AI document processing and data extraction
* OCR + AI workflows
* AI-powered data entry and automation
* AI calling/voice workflows
* Intelligent integrations with existing business systems
* Generative and Agentic AI workflows.
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🎨 Product UX/UI
I can also take ownership of the product experience — from user flows and wireframes to high-fidelity Figma designs and developer-ready UI systems.
🛠️ Core Technologies
React | React Native | iOS | Swift | SwiftUI | Node.js | Laravel | PHP | REST APIs | MySQL | SaaS | AI | Figma
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⭐ Why Clients Work With Me
I don't approach projects as simply "writing code." I focus on understanding the business problem, designing the right solution, building a maintainable architecture, and delivering a production-ready product.
Whether you are:
* Starting a new SaaS product
* Building or modernizing a mobile application
* Digitizing a complex business workflow
* Developing a fleet/logistics platform
* Adding AI automation to an existing system
* Scaling an existing product
I can help take the project from idea → architecture → UX → development → integration → production.
📩 Have a product idea or an existing system that needs to be built or improved? Let's discuss the problem you're trying to solve and the best way to turn it into a reliable, scalable product.
React Native
Mobile App Development
iOS Development
React
SaaS
Software Architecture
API Integration
Swift
Android App Development
Node.js
Laravel
Figma
OpenAI API
Artificial Intelligence
Fleet Management
Logistics Management
Video Stream
Video Processing
TypeScript
Cross Functional Team Leadership
Krishna K.
Noida, India
$12/hr
4.9
3 jobs
With 12+ years of professional experience, I help businesses build, modernize, and maintain high-performance web applications using C#, ASP.NET Core, ASP.NET MVC, .NET Framework, Web API, SQL Server, Azure, and WordPress. I've worked on enterprise platforms, business-critical applications, custom business software, CMS-driven websites, and long-term production systems where reliability, scalability, security, and clean architecture are essential.
Along with enterprise .NET development, I specialize in building and customizing WordPress websites, developing custom themes and plugins, WooCommerce stores, API integrations, performance optimization, and ongoing website maintenance. Whether you need a scalable business application or a high-performing WordPress solution, I deliver secure, maintainable, and future-ready results.
I specialize in understanding existing codebases quickly, solving complex technical challenges, and delivering solutions that are secure, maintainable, and built for long-term growth.
## What I Can Help You With
✔ ASP.NET Core & ASP.NET MVC application development
✔ C# backend development and business logic implementation
✔ REST API development and third-party API integrations
✔ SQL Server database design, optimization, stored procedures, and performance tuning
✔ Entity Framework, LINQ, and efficient data access solutions
✔ Legacy .NET application modernization and code refactoring
✔ WordPress website development and customization
✔ Custom WordPress themes and plugin development
✔ WooCommerce development and payment gateway integration
✔ WordPress speed optimization, security hardening, and SEO improvements
✔ Bug fixing, troubleshooting, and production support
✔ Performance optimization and application scalability
✔ Azure cloud deployment, maintenance, and long-term technical support
## Technical Expertise
### Languages & Frameworks
* C#
* ASP.NET
* ASP.NET Core
* ASP.NET MVC
* .NET Framework
* Web API
* WordPress
* WooCommerce
### Database
* SQL Server
* Entity Framework
* LINQ
* Stored Procedures
* Query Optimization
* Database Design
### Development Practices
* Clean Architecture
* SOLID Principles
* RESTful API Design
* Object-Oriented Programming (OOP)
* Performance Optimization
* Debugging & Troubleshooting
* Git & Version Control
* Azure Deployment
* API Integrations
* CI/CD
## Why Clients Work With Me
* 12+ years of hands-on .NET development experience
* Strong experience with enterprise applications and WordPress solutions
* Clean, maintainable, secure, and scalable code
* Fast understanding of existing systems and legacy codebases
* Reliable communication and on-time delivery
* Long-term mindset focused on quality, performance, and business value
Although I'm growing my presence on Upwork, my professional experience comes from years of successfully delivering projects for clients outside the platform.
My goal is to build long-term partnerships by providing dependable development, transparent communication, and high-quality results.
If you're looking for a Senior .NET Developer or WordPress Expert who can confidently take ownership of your application, modernize existing systems, build scalable web solutions, or develop high-performing WordPress websites, I'd be happy to discuss your project.
Web Service
jQuery
ASP.NET MVC
ASP.NET Web API
Azure App Service
ASP.NET Core
ASP.NET
LINQ
Site Planning
Angular
Amazon EC2
Microsoft SQL Server
React
AngularJS
Nikita A.
Noida, India
$20/hr
5.0
16 jobs
🌟 Elevate Your iOS, iPhone, iPad, and macOS Development Projects with a Proven Expert! 🌟
🔹 Over a Decade of Mastery in Crafting Digital Excellence for Apple Platforms
✅ 50+ Successful Mobile Apps Delivered for iOS, iPhone, iPad, and macOS
✅ 1600+ Hours of Top-Tier Development Across 47+ Projects
✅ POS Expert – Built a custom Point-of-Sale (POS) system for a Canada-based pizza chain, deployed in 125+ stores
🔹 Why Choose Me?
✨ End-to-End Development – From concept to App Store deployment
✨ Agile/SCRUM Pro – Reliable, iterative, and transparent workflows
✨ Deep Platform Expertise – iOS, iPhone, iPad, macOS, Swift, Objective-C, SwiftUI
✨ Industry-Specific Solutions – FinTech, Healthcare, E-commerce, Social Media, POS, and more
🚀 My Specializations:
📱 App Development Expertise
✔ Social/Dating Apps – Video/audio chat, real-time messaging (WebRTC, Twilio)
✔ E-Commerce & Marketplaces – Payment gateways (Apple Pay, Braintree), cart systems
✔ On-Demand Apps – Ride-hailing, food delivery, home services
✔ Health & Telemedicine – HIPAA-compliant data, appointment booking
✔ Live & Video Streaming – Low-latency streaming (Agora, ZegoCloud)
✔ FinTech & Banking – Secure transactions, KYC integration
✔ Augmented Reality (ARKit) – Interactive AR experiences
✔ POS Systems – Custom-built for retail, restaurants, and multi-location businesses
💡 Technical Skills & Tools
Languages: Swift, Objective-C, SwiftUI
Architecture: MVVM, MVP, MVC, Clean Architecture
Backend Integration: Firebase, REST, GraphQL, WebSockets (Socket.IO)
AI & Chat: OpenAI API, ChatGPT, CometChat SDK
Payments: Apple Pay, Stripe, Braintree, Moneris, In-App Purchases
Testing: XCTest, UI Automation, CI/CD (Fastlane, Jenkins)
Security: Biometrics, OAuth2, End-to-End Encryption
🔧 Advanced Integrations
Real-Time Features: WebRTC, Live Streaming, VOIP (Linphone, Sinch)
Maps & Location: Google Maps, Mapbox, Geofencing, Beacons
Analytics & Crash Reporting: Firebase, Crashlytics, New Relic
Push Notifications: Firebase Cloud Messaging, OneSignal
Database: CoreData, Realm, SQLite
🎯 Industries I’ve Worked In:
Retail & POS – Custom checkout systems, inventory management
Food & Beverage – Delivery apps, POS for restaurants
Healthcare – Telemedicine, fitness tracking
Finance – Mobile banking, investment apps
Travel – Airline & hotel booking platforms
Social Media – Dating apps, audio/video communities
💼 Notable Projects:
✔ POS System for 125+ Stores – Custom-built for a Canadian pizza chain
✔ Live Video Social App – 1M+ downloads, WebRTC integration
✔ Banking App – Secure transactions, biometric login
✔ AI-Powered Wellness App – ChatGPT integration for personalized coaching
📩 Let’s Build Something Remarkable!
I’m fluent in English and passionate about turning your vision into a high-performance Apple app. Whether you need a startup MVP or a large-scale POS solution, I’ve got you covered.
👉 Get in touch today—let’s discuss your project!
iOS Development
iOS
Mobile App Development
macOS
Mac OS App Development
Map Integration
VoIP
Push Notifications
Google Maps API
Native App Development
Chat & Messaging Software
Swift
Objective-C
Firebase
Socket.io
Milan A.
Noida, India
$25/hr
4.8
18 jobs
I build and ship production software — web apps, mobile apps, and the backends behind them. 13 years, 40+ delivered projects, apps live on the App Store.
Most clients come to me with one of two problems: they have an idea that needs to become a real, working product — fast. Or they have a half-built or stalled product and need someone senior to get it shipped and keep it running.
WHAT I BUILD
• Web & backend — Node.js, NestJS, Express, TypeScript; React / Next.js front ends; PostgreSQL & MySQL
• Mobile — cross-platform apps with Flutter (iOS + Android), plus the APIs behind them
• Cloud & infra — AWS (ECS Fargate, Aurora Serverless, S3), Docker, Cloudflare, CI/CD
• Integrations — Stripe and payment flows, REST APIs, WebSockets, real-time features, push notifications
WHY CLIENTS STAY WITH ME
• Senior judgment — 13 years of shipping means architecture decisions you won't have to redo later.
• AI-augmented delivery — I use modern AI tooling throughout the pipeline, so you ship sooner and pay for fewer hours, without cutting corners on review and quality.
• Honest scoping — I tell you what's hard before you pay for it, and I don't take work I can't do well.
• Long-term reliability — I've kept clients for 5–7+ years because the work holds up.
SOME OF WHAT I'VE BUILT
A karaoke venue platform (web + companion mobile apps, Stripe payments, real-time song requests) that I've maintained and evolved for 7+ years. A multi-tenant SaaS platform. Emergency-response and logistics apps live on the App Store. Plus my own products — a school management ERP and a website-builder SaaS.
I'm founder-led and fully remote, with a senior team that scales to your project — so I can take on a quick fix or own a full build end to end.
Tell me what you're building and I'll give you an honest scope and timeline before you commit.
Objective-C
Swift
Android App Development
Dart
React
iOS Development
Flutter
Node.js
TypeScript
PostgreSQL
MySQL
Amazon Web Services
Next.js
API Integration
Mobile App Development
Full-Stack Development
NestJS
ExpressJS
Docker
Sarvesh S.
Noida, India
$15/hr
4.9
338 jobs
Senior WordPress & WooCommerce Developer | 17,000+ Hours | 250+ Projects | Top Rated Plus
I help businesses build, customize, and scale WordPress and WooCommerce websites that are fast, reliable, and easy to manage.
Over the past 18+ years, I've worked with startups, agencies, and enterprise clients to develop custom plugins, WooCommerce stores, complex API integrations, CRM connections, and large-scale WordPress applications.
What I can help you with
✅ Custom WordPress Development
✅ WooCommerce Development
✅ Custom Plugin Development
✅ API Integration (REST / SOAP)
✅ Payment Gateway Integration
✅ CRM Integration
✅ WordPress Performance Optimization
✅ Database Optimization
✅ Elementor Development
✅ Bug Fixing
✅ Website Migration
✅ Speed Optimization
✅ Server Configuration
Recent Projects
• WooCommerce custom pricing system
• Complex CRM integrations
• Custom API automation
• WordPress plugin development
• Dynamic reporting dashboards
• Membership websites
• Large WooCommerce stores
Why clients hire me
✔ 100% Job Success
✔ Top Rated Plus
✔ 17,000+ hours
✔ 250+ successful projects
✔ Clear communication
✔ Clean & maintainable code
✔ Long-term support
If you're looking for a developer who can solve complex WordPress or WooCommerce problems without unnecessary delays, let's discuss your project.
WordPress
PHP
WooCommerce
WordPress Customization
WordPress Theme
Elementor
WordPress Development
WordPress Migration
WordPress e-Commerce
WordPress Optimization
WordPress Security
Laravel
API Integration
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