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$25/hr
98%
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$500K+ earned
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Next-Gen Software Development Company delivers innovative solutions for SMBs and Enterprises with a proven track record in Product Development, Technology Consulting, and IT Outsourcing. Our Experience Design, Complex Engineering, and Agile Delivery give the best software product for better business outcomes.
SERVICE OFFERINGS:
- Product Development
- Custom Web Development
- Enterprise Application
- Mobile App Development
- Blockchain & Metaverse
- BI & Analytics
- Generative AI & ML Services
- UI/UX Design
- Digital Marketing
- On-demand Developers & Team
TEACHNOLOGY PARTNERSHIP: Alliances with Microsoft, Salesforce, Odoo, SAP, Zoho, AWS, Google, and Hedera have enabled us to co-create high-speed innovation and bring sustainable value to enterprises.
TEAM: With 500+ DevOps enabled software professionals and full-stack developers working full-time, they have an average experience of 3 to 20 years. With 15+ years of experience, we have delivered 2500+ projects for more than 1000+ clients located in more than 15 countries.
OBJECTIVE: Deliver scalable digital products and software solutions to unlock the power of client-centric intelligent technology that reduces time to market and reimagines cost-takeout initiatives. Create business excellence by staying committed to the core values of generating enterprise value and imbibing the spirit of innovation, forward-thinking, dependability, and integrity with the accountability to drive digital transformation forward.
INDUSTRIES: Healthcare & Life science, Travel & Hospitality, Retail & eCommerce, Education & eLearning, Finance & Banking, Manufacturing and Industrial, Logistics & Transportation, Technology, Automotive, Gambling, Aviation, Media & Entertainment, Public Sector, Real Estate, Energy, Agriculture, Consulting, Utilities
TECHNOLOGY EXPERIENCE:
Open Source: PHP, Python/Django, MEAN / MERN, CGI Perl
Microsoft: .NET Core, ASP.NET, SharePoint, Power BI, Azure, C#, VB.NET, Power Apps
Mobile: Flutter, React Native, iOS, Android, Swift, Unity, Ionic, Java, Objective-C, C++, jQueryMobile
Architecture Patterns: Microservices, Server less, MVC, N-tier, Monolithic
ERP & CRM: Salesforce, ODOO, Dynamics365 Business Central / NAV, SAP, Zoho, D365 CRM
UI/UX: Photoshop, Adobe XD, Figma, CorelDraw, Fireworks, Dreamweaver, AngularJS, ReactJS, VueJS, Typescript, HTML 5, AJAX, JavaScript, jQuery, Knockout.js, Backbone.js,
Frameworks: Laravel, CodeIgniter, Django, Yii, CakePHP, Zend Framework, Symfony, MVC
CMS & eCommerce: WordPress, Magento, Shopify, Prestashop, Moodle, Umbraco, BigCommerce, , Zen Cart, NopCommerce, WooCommerce, DotNetNuke
Database: MySQL, MariaDB, MSSQL, PostgreSQL, MongoDB, NoSQL, MS Access, Oracle
Associated with
Flexsin Inc. - Top Rated+ Agency
$10M+
earned
$25/hr
100%
Job Success
$400K+ earned
Available now
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Dipak K.
has worked
.
🏆 𝗧𝗢𝗣 𝟭% 𝗨𝗣𝗪𝗢𝗥𝗞 𝗙𝗥𝗘𝗘𝗟𝗔𝗡𝗖𝗘𝗥
💰 $𝟭𝗠+ 𝗘𝗔𝗥𝗡𝗘𝗗
🤝 𝗛𝗘𝗟𝗣𝗘𝗗 𝗧𝗢 𝗥𝗔𝗜𝗦𝗘 $𝟏𝟬𝗠+ 𝗙𝗨𝗡𝗗𝗜𝗡𝗚 𝗙𝗢𝗥 𝗠𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦
🚀 Top Rated Plus | Flutter Expert | Mobile App Development (iOS & Android) | Full-Stack & Web Apps | AI & BLE
🎯𝗪𝗛𝗢 𝗜 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛
I help startups, founders, and businesses build world-class Mobile Apps, Websites, SaaS Platforms, and AI-powered products that drive growth, secure funding, and scale globally.
Most developers build apps — I build products that generate real business results.
If you need an expert Mobile App Developer, Full Stack Developer, Flutter Developer, iOS Developer, Android Developer, React Native Developer, or Web Developer who can take your idea from concept to launch, you’re in the right place.
𝗠𝗬 𝗣𝗥𝗢𝗩𝗘𝗡 𝗧𝗥𝗔𝗖𝗞 𝗥𝗘𝗖𝗢𝗥𝗗 𝗙𝗢𝗥 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘
🏆 Top Rated Plus (Top 1%) on Upwork
💰 $1M+ earned | 13,000+ hours
📈 $10M+ raised by my clients
📲 5M+ Active users
⭐ 100% Job Success Score
🔁 90%+ repeat clients
🌍 500+ clients across US, Europe, Middle East & Globally
📱 MOBILE APP DEVELOPMENT
• Native iOS: Swift, SwiftUI, Objective-C, Xcode
• Native Android: Kotlin, Java, Android Studio
• Cross-Platform: Flutter, FlutterFlow, React Native, Dart
🌐 WEB DEVELOPMENT
• Frontend: React.js, Next.js, TypeScript, Tailwind CSS, HTML5, CSS3, JavaScript
• Backend: Node.js, Express.js, Nest.js, PHP, Laravel, RESTful APIs, GraphQL, WebSockets
• E-Commerce: Plugin & theme development, payment gateway integration, custom solutions
• WordPress: Custom theme & plugin development, WooCommerce, Elementor, ACF
• Other CMS: Webflow, Strapi, Contentful, Sanity, Ghost
• E-Commerce Platforms: WooCommerce, BigCommerce — theme & app customization
⚙️ NO-CODE / LOW-CODE PLATFORMS
• AI-Powered Builders: Lovable.AI, Bolt.new, Cursor, v0 by Vercel, Replit, Copilot, Claude/Anthropic
• App Builders: FlutterFlow, Bubble, Glide, Adalo
• Automation: Zapier, Make (Integromat), n8n
☁️ BACKEND & CLOUD SERVICES
• Firebase: Firestore, Realtime DB, Auth, Storage, Cloud Functions
• AWS: EC2, Lambda, S3, Amplify, Lightsail
• GCP | Microsoft Azure | Supabase | Vercel | Hostinger
🗄️ DATABASE
Firestore | MySQL | PostgreSQL | MongoDB | SQLite | Realm | Core Data | Supabase
🤖 AI & AUTOMATION
• ChatGPT API & OpenAI Integration
• Natural Language Processing (NLP)
• Voice & Speech AI
• Predictive Analytics
🎨 UI/UX DESIGN
Figma | Sketch | Adobe XD | InVision | SwiftUI | Jetpack Compose | Flutter Widgets | Material UI
🔑 KEY FEATURES & INTEGRATIONS
✔️ Secure User Authentication & Social Logins (Google, Apple, Facebook, Twitter, LinkedIn)
✔️ Payment Gateways: Stripe, PayPal, Razorpay, Apple Pay, Plaid, In-App Purchases & Subscriptions
✔️ Real-Time Chat & Messaging (Twilio API, Firebase Chat)
✔️ Push Notifications | Video Calling | WebRTC
✔️ Maps & Geolocation: MapKit, Mapbox, Google Maps
✔️ Health & Fitness: HealthKit, Google Fit
✔️ Analytics: Firebase Analytics, Mixpanel, Crashlytics, Google Analytics
✔️ QA & Testing: Unit Testing, Integration Testing, Regression Testing
✔️ Project Tools: Git, GitHub, Bitbucket, JIRA, Trello, Asana
🏗️ INDUSTRIES I HAVE DELIVERED IN
E-Commerce | Fintech & Banking | Health & Fitness | Social Networking & Dating | On-Demand Services | Food Delivery | Ride Booking | Real Estate | SaaS | Education & E-Learning | Media & Entertainment | Streaming & Audio | Healthcare | Logistics & Transport | Marketplace | Travel & Navigation | Wellness & Coaching | Legal Services | Event & Booking | Automotive | Fashion & Lifestyle | Hospitality
🔍 KEYWORDS
Mobile App Developer · iOS App Developer · Android App Developer · Flutter Developer · React Native Developer · FlutterFlow Developer · Swift Developer · Kotlin Developer · Full Stack Developer · Web Application Developer · SaaS Developer · MERN Stack Developer · Firebase Developer · AWS Developer · Node.js Developer · React.js Developer · Next.js Developer · API Integration · ChatGPT Integration · AI App Developer · Lovable.AI · Bolt.new · No-Code Developer · Low-Code Developer · FlutterFlow · Bubble · Webflow · WordPress Developer · WooCommerce · Shopify · Strapi · Contentful · CMS Development · Plugin Development · Theme Development · Fintech App Developer · E-Commerce App Developer · Dating App Developer · Ride Booking App Developer · On-Demand App Developer · Cross-Platform App Developer · RESTful API · GraphQL · TypeScript · Supabase · Payment Gateway Integration · In-App Purchases · Push Notifications · HealthKit · MapKit · Mapbox · Alamofire · Twilio · Google Analytics · QA Testing · Unit Testing · Regression Testing · Figma · UI/UX Design
Associated with
Devsto – Top Rated Plus Agency | Mobile App Development | Web Development | AI & SaaS Solutions | eCommerce Experts
$95/hr
100%
Job Success
$1M+ earned
Available now
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𝗜𝘀 𝘆𝗼𝘂𝗿 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 𝗰𝗼𝘀𝘁𝗶𝗻𝗴 𝘆𝗼𝘂 𝗺𝗼𝗻𝗲𝘆 𝗮𝗻𝗱 𝗰𝗮𝘂𝘀𝗶𝗻𝗴 𝘀𝗹𝗲𝗲𝗽𝗹𝗲𝘀𝘀 𝗻𝗶𝗴𝗵𝘁𝘀? Let’s turn that stress into success.
With over 20 years of experience as a seasoned FinTech leader and Global CTO specializing in 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 𝗜𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻, 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, and 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴, a proven track record awaits you. Payment systems have been built and optimized to not only meet today's demands but also scale with your business tomorrow—delivering over 𝗨𝗦𝗗 𝟮𝟬𝗠 𝗶𝗻 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗳𝗼𝗿 𝟭𝟬+ 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 and powering 200+ successful app launches worldwide.
𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲:
𝟭. 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Mastery in integrating 𝗦𝘁𝗿𝗶𝗽𝗲, 𝗦𝘁𝗿𝗶𝗽𝗲 𝗖𝗼𝗻𝗻𝗲𝗰𝘁, and other payment gateway APIs, ensuring secure, efficient, and scalable payment systems.
𝟮. 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 & 𝗧𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗟𝗼𝗴𝗶𝗰: Proven expertise in handling recurring payments, multi-invoice payments, partial payments, and complex scenarios like payment failures, refunds, and voiding transactions.
3. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝘆: Adept at leading cross-functional teams, communicating with C-level executives, and transforming technical challenges into robust, revenue-generating solutions.
𝟰. 𝗛𝗮𝗻𝗱𝘀-𝗢𝗻 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Whether you’re dealing with broken software systems or planning a complete digital transformation, startups and enterprises alike have seen at least a 𝟭𝟬% 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁 𝗶𝗻 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗮𝗻𝗱 𝗽𝗿𝗼𝗳𝗶𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 through these solutions.
𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 𝗶𝗻 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴:
Leveraging cutting-edge payment processing protocols — 𝗣𝗖𝗜-𝗗𝗦𝗦 𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲, 𝘁𝗼𝗸𝗲𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗲𝗻𝗰𝗿𝘆𝗽𝘁𝗶𝗼𝗻, and 𝟯𝗗 𝗦𝗲𝗰𝘂𝗿𝗲 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻𝘀 — ensures sensitive data is safeguarded and fraud risks are mitigated. Expertise in configuring 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, 𝗦𝗲𝘁𝘂𝗽 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, and utilizing 𝘄𝗲𝗯𝗵𝗼𝗼𝗸𝘀 for real-time event handling optimizes 𝗦𝗖𝗔 flows, manages decline handling and chargebacks, and ensures seamless reconciliation across multiple payment channels. A deep understanding of card network rules, risk management strategies, and automated dunning processes guarantees that payment operations remain both resilient and highly efficient.
𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗜𝗻-𝗔𝗽𝗽 𝗣𝘂𝗿𝗰𝗵𝗮𝘀𝗲 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴:
Extensive experience with 𝗶𝗻-𝗮𝗽𝗽 𝗽𝘂𝗿𝗰𝗵𝗮𝘀𝗲 systems on both 𝗚𝗼𝗼𝗴𝗹𝗲 𝗣𝗹𝗮𝘆 and 𝗔𝗽𝗽𝗹𝗲 𝗔𝗽𝗽 𝗦𝘁𝗼𝗿𝗲 platforms complements robust payment gateway integrations. Successfully blending these in-app purchase mechanisms with 𝗦𝘁𝗿𝗶𝗽𝗲 creates a unified payment ecosystem that supports subscriptions, one-time purchases, and cross-platform transactions. Notable projects include 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗹𝘆 and 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽, where in-app purchase flows were seamlessly integrated with backend payment processing to optimize revenue and enhance user experience.
𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀:
𝟭. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗜𝗺𝗽𝗮𝗰𝘁: Solutions delivered have scaled workforces and revenues — streamlining processes and reducing monthly costs dramatically (e.g., cutting costs from $𝟭𝟲𝟬,𝟬𝟬𝟬 𝘁𝗼 $𝟱𝟬,𝟬𝟬𝟬).
𝟮. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻: Engagements have doubled revenue for companies like 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽 and contributed to a 𝟵𝟵.𝟲% 𝗰𝗿𝗮𝘀𝗵-𝗳𝗿𝗲𝗲 𝗿𝗮𝘁𝗲, leading to over 𝟭𝟬,𝟬𝟬𝟬 𝗱𝗼𝘄𝗻𝗹𝗼𝗮𝗱𝘀 and high user ratings.
𝟯. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻 & 𝗔𝗴𝗶𝗹𝗶𝘁𝘆: Continuously integrating the latest tools—from 𝗔𝗜 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻𝘀 like ChatGPT and DeepSeek to advanced mobile app development frameworks — ensures clients remain ahead of the curve.
𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲 & 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆:
PCI-DSS | SOC2 | HIPAA | GDPR
𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲?
Partner with an expert who delivers tangible results, allowing you to focus on business growth. If you're ready to stop wrestling with payment integration issues and start experiencing streamlined, profitable operations, let's connect.
Book a Consultation Today.
$30/hr
100%
Job Success
$4K+ earned
Available now
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Omer A.
has worked
.
𝐅𝐮𝐥𝐥-𝐬𝐭𝐚𝐜𝐤 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐧𝐝 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐢𝐧𝐠 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞, 𝐞𝐧𝐝-𝐭𝐨-𝐞𝐧𝐝 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬.
I design and develop complete digital products tailored to real business needs — from mobile applications to robust backend systems.
Whether you're building a new product, improving an existing system, or scaling your operations, I can take ownership of the entire development process and deliver a reliable, production-ready solution.
What I deliver:
• Mobile applications (Flutter, iOS, Android)
• Backend systems (Python & PHP — APIs, databases, authentication)
• End-to-end product development (architecture → development → deployment)
• Technical guidance to turn ideas into scalable systems
• Testing, QA, App Store & Google Play deployment
How I add value:
• Focus on business goals, not just code
• Clean, scalable, and maintainable architecture
• Reduced complexity by handling full-stack delivery
• Clear communication and reliable execution
Core technologies:
Flutter • iOS • Android • Python • PHP • REST APIs • Firebase • MySQL
If you're looking for someone who can take ownership and deliver a complete solution from idea to deployment, feel free to reach out.
Highlighted Skills:
Android | iOS | Mobile App Development | Smartphone | Android App Development | Flutter | iOS Development | JavaScript | React Native | Java | Firebase | Web Development | Swift | User Authentication | UX & UI Design | App Design | Dart | API | Web Design | In-App Purchases | Python | Mobile App Design | FlutterFlow | API Integration | Mobile App
$47/hr
100%
Job Success
$200K+ earned
Available now
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I help businesses build AI-first products, deploy Agentic AI systems, automate operations with n8n, and develop production-ready SaaS platforms that eliminate manual work, reduce operational costs, and accelerate growth.
Over the past 15+ years, I've delivered enterprise software and digital transformation solutions for organizations including Telstra, Optus, Nestlé, Honeywell, Siemens, Kmart, Realestate Australia, Marvel Stadium, Royal Hobart Hospital, Monash University, Southern Cross Station, and numerous funded startups across Australia, Europe, North America, and the Middle East.
Today my primary focus is designing and building AI Operating Systems—intelligent platforms where multiple AI agents collaborate across sales, marketing, customer service, finance, HR, operations, and executive reporting.
🤖 AI Agents • Agentic AI • AI Automation
I build autonomous AI systems that reason, retrieve knowledge, call APIs, execute workflows, and complete business processes with minimal human intervention.
AI Specialisations
🤖 AI Agents 🧠 Agentic AI 👥 Multi-Agent Systems 👨💼 AI Employees
💬 AI Copilots 🏢 AI Operating Systems ⚙️ AI Workflow Automation
📈 AI Business Automation 🔗 AI CRM Automation 🎯 AI SDR Systems
📋 AI Executive Assistants 📚 AI Knowledge Workers 🎧 AI Customer Support
☎️ AI Receptionists 📄 AI Document Processing 📧 AI Email Automation
📊 AI Reporting 🧩 AI Decision Intelligence 🧠 AI Frameworks & Models
✅ OpenAI GPT-5
✅ Claude 4
✅ Claude Code
✅ Google Gemini
✅ Vertex AI
✅ Azure OpenAI
✅ Anthropic API
✅ OpenRouter
✅ Ollama
✅ DeepSeek
✅ Mistral
✅ Llama
✅ Qwen
✅ Grok API
⚡ Agent Frameworks
✅ LangGraph
✅ LangChain
✅ CrewAI
✅ AutoGen
✅ LlamaIndex
✅ DSPy
✅ PydanticAI
✅ MCP (Model Context Protocol)
✅ AI Tool Calling
✅ Function Calling
✅ Structured Outputs
✅ Prompt Engineering
📚 RAG & Knowledge Systems
✅ Retrieval Augmented Generation (RAG)
✅ Hybrid Search
✅ Vector Databases
✅ Pinecone
✅ Weaviate
✅ Qdrant
✅ Supabase Vector
✅ pgvector
✅ Semantic Search
✅ Document Intelligence
✅ OCR
✅ Enterprise Knowledge Bases
🔄 Workflow Automation
One of my core specialties.
Platforms
⚙️ n8n
⚙️ Make
⚙️ Zapier
⚙️ Langflow
⚙️ Flowise
⚙️ Temporal
⚙️ Custom Workflow Engines
Business Automation
💼 Sales
🤝 CRM 💰 Finance 📦 Procurement 👥 HR 🎯 Recruitment ❤️ Customer Success
🏭 Operations 🏗 Manufacturing 🏥 Healthcare ⚖️ Legal 🏠 Construction 🏢 Real Estate🎙 Voice AI
Production-grade conversational AI systems.
Platforms
🎙 Vapi 🎙 Retell AI 🎙 ElevenLabs 🎙 Twilio 🎙 Deepgram 🎙 Cartesia 🎙 OpenAI Realtime API
🎙 LiveKit 🎙 SIP 🎙 WebRTC
☎️ AI Phone Agents
📞 Outbound AI Sales
🎧 Inbound AI Receptionists
🏢 AI Call Centres
📅 Appointment Booking
🔐 Voice Authentication
🚀 AI Development Tools
✅ Cursor AI
✅ Claude Code
✅ GitHub Copilot
✅ Windsurf
✅ Replit Agent
✅ Lovable
✅ Bolt
✅ V0
✅ Firebase Studio
✅ Supabase
💻 Full Stack Engineering
Frontend
💠 Next JS
💠 React
💠 TypeScript
💠 Tailwind CSS
💠 ShadCN UI
💠 React Native
💠 Expo
Backend
⚙️ Node JS
⚙️ Nest JS
⚙️ FastAPI
⚙️ Python
⚙️ Laravel
⚙️ .NET
⚙️ GraphQL
⚙️ REST APIs
Databases
🗄 PostgreSQL
🗄 Supabase
🗄 MongoDB
🗄 Redis
Cloud & DevOps
☁️ AWS
☁️ Azure
☁️ Google Cloud
☁️ Docker
☁️ Kubernetes
☁️ Vercel
☁️ Cloudflare
☁️ GitHub Actions
☁️ CI/CD
🔗 Business Integrations
🔗 Stripe
🔗 HubSpot
🔗 Salesforce
🔗 Zoho CRM
🔗 Pipedrive
🔗 QuickBooks
🔗 Xero
🔗 Shopify
🔗 WooCommerce
🔗 Microsoft 365
🔗 Google Workspace
🔗 Slack
🔗 Microsoft Teams
🔗 Twilio
🔗 Calendly
🔗 Notion
🔗 Airtable
🔗 ClickUp
🔗 Monday
🔗 Custom APIs
🏗 What I Build
🚀 AI Operating Systems 🚀 AI SaaS Platforms 🚀 Startup MVPs 🚀 Multi-Tenant SaaS 🚀 AI Dashboards 🚀 Executive Reporting Platforms 🚀 CRM Platforms 🚀 Customer Portals
🚀 Internal Business Platforms 🚀 Marketplace Applications 🚀 AI Sales Platforms
🚀 AI Marketing Systems 🚀 AI Analytics 🚀 AI Procurement 🚀 AI Recruitment 🚀 AI Compliance
🚀 AI Document Intelligence
🏆 Why Clients Hire Me
⭐ 15+ Years Enterprise Experience
⭐ CTO-Level Technical Leadership
⭐ Enterprise Architecture & Solution Design
⭐ AI Strategy & Product Thinking
⭐ Business Process Automation
⭐ Secure AI Architecture
⭐ Production-Ready Code
⭐ Scalable Cloud Infrastructure
⭐ Fast AI MVP Delivery
⭐ Excellent Communication
⭐ End-to-End Project Ownership
🌍 Industries
🏪 Retail 🛒 E-commerce 🏥 Healthcare 🏗 Construction 🏢 Real Estate 🏭 Manufacturing
💳 Finance 🚚 Logistics ⛏ Mining 💼 Professional Services 🏛 Government 🎓 Education
💡 Looking for help with...
✨ AI Agent Development
✨ Agentic AI Solutions
✨ n8n Automation
✨ Workflow Automation
✨ AI Operating Systems
✨ Voice AI
✨ AI SaaS Development
✨ Startup MVP Development
✨ RAG & Knowledge Bases
✨ AI CRM Automation
✨ AI Customer Support
✨ AI Sales Automation
✨ AI Executive Dashboards
✨ AI
Associated with
VRTECHSOL
$100K+
earned
$30/hr
96%
Job Success
$30K+ earned
Available now
Offers consultations
Start of list.
End of list.
Turn your app idea into a launch-ready product for iOS and Android - without managing separate frontend developers, backend developers, and project managers.
I’m Rajibul Ahsan, a Top Rated Senior Full Stack and Mobile Developer with more than 97 completed projects on Upwork. I specialize in Flutter and React Native development for both iOS and Android.
I manage the complete development lifecycle, including frontend, backend, databases, cloud infrastructure, AI functionality, testing, and App Store and Google Play submission - so you work with one accountable technical partner instead of coordinating multiple specialists.
What I Build -
I build cross-platform mobile applications and MVPs for startups and growing businesses - from product planning and architecture to App Store and Google Play publishing.
Mobile Apps I Develop
-Food Delivery and Grocery Apps
-Ride-Sharing and Booking Apps
-Real-time GPS tracking, driver management, scheduling, route calculation, and online payments.
-Social Media and Chat Apps
-Real-time messaging, media sharing, notifications, user profiles, moderation, and in-app support.
-E-Commerce and Marketplace Apps
-Product listings, shopping carts, Stripe payments, Shopify integrations, order tracking, and seller dashboards.
-Fitness and Sports-Tracking Apps
-Activity tracking, progress reports, subscriptions, reminders, and wearable or health-service integrations.
-Task Management and Productivity Apps
-Team collaboration, task assignment, scheduling, file sharing, and progress tracking.
-Real Estate and Inventory Management Apps
-Property listings, booking management, inventory tracking, search filters, maps, and admin dashboards.
-AI-Powered Mobile Apps
-ChatGPT integration, AI assistants, smart recommendations, automated workflows, content generation, and LLM-powered features.
Every application is developed with responsive layouts, smooth UI interactions, secure architecture, scalable code, reliable API integration, and strong performance across iOS and Android devices.
Recent Work Includes -
* A fintech and payments application featuring Stripe integration, real-time order tracking, and scheduling capabilities.
* An emergency communication application using Twilio masked calling and the WhatsApp Business API within a QR-based workflow.
* AI-powered connection and matchmaking applications incorporating OpenAI and LLM technology.
* Ride-sharing and marketplace applications with live geolocation, real-time tracking, and in-app payment processing.
Why Clients Keep Hiring Me -
I deliver clean, scalable, and maintainable code while communicating clearly throughout the project. I respond quickly, provide regular progress updates, and take a proactive approach to identifying and resolving potential issues.
I also provide realistic timelines instead of overpromising to win a project. Clients return for additional work because their applications are delivered reliably, perform as expected, and remain easy to maintain and expand.
How I Work -
Discovery call and scope definition → architecture and technology selection → weekly testable builds → backend, AI, and payment integrations → quality assurance across devices → App Store and Google Play submission → post-launch support.
Technology Stack -
Flutter, React Native, Node.js, Firebase, Supabase, Stripe, OpenAI and LLM APIs, REST APIs, push notifications, real-time chat, and cloud infrastructure.
Send me your app idea or existing codebase, and I’ll respond with a practical technical approach and realistic timeline-no generic, copy-and-paste response.
Highlighted Skills -
Full Stack Development | Mobile App Development | Flutter Development | React Native Development | iOS App Development | Android App Development | Cross-Platform App Development | AI App Development | MVP Development | SaaS Development | Web App Development | API Development | API Integration | Backend Development | Node.js | TypeScript | Next.js | Laravel | PHP | Firebase | Supabase | MySQL | PostgreSQL | Stripe Integration | Shopify Integration | OpenAI API | LLM Integration | AI Automation | REST API | WebSockets | Real-Time Chat | Push Notifications | Google Maps Integration | User Authentication | In-App Purchases | Cloud Infrastructure | AWS | App Store Deployment | Google Play Deployment
Associated with
AttoExa Solutions
$30K+
earned
$40/hr
100%
Job Success
$300K+ earned
Available now
Offers consultations
Start of list.
End of list.
Oleg R.
has worked
.
Full stack mobile app developer with 15+ years of experience in Mobile App Development, specializing in Flutter, React Native, React, IOS, Swift, Android, Python, and Java.
I have successfully delivered 120+ mobile applications in different roles as flutter app developer, flutter full stack developer, flutter flow, ai mobile app developer, mobile app design, mobile ui ux designer, ios developer, android developer, react native developer, mobile game developer achieving a 5-star rating on Upwork and helping clients scale their businesses with high-performance solutions.
🚀 Flutter Mobile App Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer for Mobile app development project.
Expert in Flutter mobile app development, delivering 30+ high-performance apps with pixel-perfect UI and smooth animations. Skilled in clean architecture and comprehensive testing for robust solutions. Experienced Mobile App Developer.
🔹 Applied game mechanics for engaging experiences in mobile development where I was a Mobile Game Developer.
🔹 Integrated real-time features, secure authentication, and cloud functions as Flutter Firebase Developer.
🔹 Built seamless API integrations and data synchronization in mobile development in Flutter mobile app development as a Flutter Laravel Specialist.
🚀 iOS app developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development:
Developed and optimized 40+ iOS apps using Swift. Implemented complex features as iOS app developer, maintaining clean architecture and best practices. Leveraged extensive experience as iOS developer Swift to create intuitive user experiences and solve challenging technical problems. Collaborated with cross-functional teams as Swift iOS developer, utilizing Kotlin Swift expertise to deliver high-quality applications on time and exceed client expectations on iOS Swift smartphone platforms.
🚀 Android Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development:
Built 30+ Android apps with adaptive UI, material design, and battery-friendly performance. Expert in Android Kotlin developer, leveraging Kotlin Swift and Kotlin Multiplatform for cross-platform solutions. Optimized security as Android reverse engineer and streamlined releases as Android app publisher, enhancing engagement and update efficiency.
🚀React Native Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development:
Built 20+ cross-platform apps with responsive UI and seamless sync. Expert in React Native mobile, React Native Expo, and React Native Firebase for real-time features. Optimized communication with React Native WebRTC. Crafted interactive experiences as React JS and Front End React specialist. Developed hybrid solutions as Java React expert, maximizing code reuse.
📱 Performance & Scalability: Built apps supporting 1M+ users, integrating real-time updates, gamification, and video streaming.
💰 Business Impact: Helped startups and enterprises generate $10M+ in revenue through well-optimized and engaging mobile applications.
iOS App Development Case Study 📱
Developed a high-performance iOS app using iOS Swift that achieved 5 star rating and featured status in the App Store. Implemented Flutter iOS compatibility for future cross-platform expansion while maintaining native performance and security. Supported iOS app marketing efforts with analytics implementation and App Store optimization, resulting in 35% higher user retention than industry average.
I am currently not accepting WordPress projects as I'm focusing exclusively on mobile app development.
Professional Achievements
🚀 Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆
🚀 4154 mobile app development hours on Upwork and still counting
🚀 100% Job Success in mobile app development (Client Satisfaction Ratio)
🚀 54+ mobile app development jobs completed successfully
✅ 98% of Clients Recommended working with me as with AI Mobile App Developer
✅ 80% Long-term Repeat Clients
✅ 15+ Years Of Experience in mobile app development, 6 years experience in Flutter mobile app development, 7 years experience in Swift and Kotlin, 4 years experience in React Native.
✅ High-Quality Work
✅ Cost-Effective AI Mobile App Developer
✅ Fluent English Verified
✅ 93% on-time delivery rate across all mobile app development milestones
Got an app idea that you think is ready to make a splash? Let's dive in and explore it together in a free intro call
Associated with
Time2Launch Group OU
$200K+
earned
$20/hr
100%
Job Success
Available now
Start of list.
End of list.
Looking for a Flutter developer who can build a scalable, production-ready mobile app, not just another MVP?
I have 9 years of software development experience, specializing in Flutter development, Flutter app development, and FlutterFlow. I help startups and businesses design, build, and scale high-quality Flutter apps, modernize existing Flutter codebases, and launch high-performance iOS & Android apps that are ready for real users.
⭐ 100% Job Success
💰 Built Investor-Funded Mobile Apps for the Health industry
📱 Apps with 1M+ Downloaders
🚀 150+ Mobile Features Delivered
Whether you're starting with a Figma design, an existing Flutter app, or a brand-new idea, I can turn it into a production-ready mobile application and take it all the way to the App Store and Google Play.
📱 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐝 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬
Built a production-ready Flutter application with:
Healthcare app for post-injury recovery tracking.
• Subscription Billing
• Nutrition and calorie tracking
• Firebase backend integration
• In-app subscriptions and premium plans
Cru Social | Flutter social networking application featuring:
• Real-time Chat
• Social Feed
• Push Notifications
• Media Sharing
• Firebase Backend
Flutter marketplace application featuring:
• Reviews
• Chat
• Product Discovery
• Firebase Integration
No Yelling: a Flutter application with GPS, reporting, and real-time notifications.
Flutter Development Services | As a Senior Flutter Developer, I specialize exclusively in Flutter.
✔ Flutter Development
✔ Flutter App Development
✔ Flutter Mobile App Development
✔ FlutterFlow Development
✔ FlutterFlow Expert
✔ Flutter MVP Development
✔ Flutter UI Development
✔ Flutter App Architecture
✔ Flutter Code Refactoring
✔ Flutter Performance Optimization
✔ Flutter App Scaling
✔ Flutter App Migration
✔ Flutter API Integration
✔ Firebase Integration
✔ Push Notifications
✔ Google Maps
✔ In-App Purchases
✔ Stripe
✔ RevenueCat
✔ App Store Deployment
✔ Google Play Deployment
I have built Flutter applications across:
• Healthcare
• Fitness
• FinTech
• Social Networking
• Beauty
• Booking Platforms
• Marketplace Apps
• Education
• Real Estate
• Productivity
•Construction
• SaaS Product
Flutter Technologies:
Flutter
Dart
FlutterFlow
Firebase
Cloud Firestore
Firebase Authentication
Firebase Storage
Firebase Cloud Messaging
Provider
Riverpod
BLoC
REST APIs
GraphQL
Supabase
Google Maps
Stripe
RevenueCat
Clean Architecture
MVVM
CI/CD
Why Clients Choose Me
📈 100+ mobile applications delivered across startups and businesses
📈 100% Job Success with experience building investor-funded healthcare and AI products
📈 End-to-end support: From Figma design → Flutter development → Firebase / REST API integration → Testing → App Store & Google Play deployment
📈 On-time delivery with revisions until you're satisfied
📈 Strong communication: Regular updates, clear milestones, and proactive collaboration
📈 Business-first mindset: Not just building Flutter apps, but creating products that deliver real business value
I can help with:
✔ Flutter MVP Development
✔ Flutter App Development
✔ Cross-Platform Apps (iOS & Android)
✔ Production-Ready Mobile Apps
✔ Firebase & REST API Integration
✔ AI-Powered Mobile Apps
✔ App Store & Google Play Deployment
✔ App Scalability & Performance
✔ Long-Term Product Development
✔ Figma to Flutter
From the first screen to production deployment, I focus on clean architecture, high performance, maintainable code, and a user experience that scales with your business.
If you're looking for a Flutter developer, senior Flutter developer, FlutterFlow expert, or a long-term partner for Flutter app development, I'd be happy to discuss your project.
Flutter Developer, Senior Flutter Developer, Flutter Development, Flutter App Development, Flutter App Developer, Flutter Mobile App Development, Flutter Expert, Flutter Engineer, FlutterFlow Expert, FlutterFlow Developer, FlutterFlow Development, Flutter Consultant, Dart Developer, Firebase Flutter, Flutter Firebase, Flutter UI, Flutter Architecture, Flutter Performance Optimization, Flutter MVP, Cross-Platform Flutter Developer, iOS Flutter Developer, Android Flutter Developer. FlutterFlow Certified, Expert, Top Recommended, Top Flutter Developer, In-app purchases, Location, Payment Gateway Integration, Apple Xcode, Android Studio, Push notifications, User authentication, User profile creation, QA, Unit Testing, Regression Testing, Dating App, Ecommerce App, Ride Booking App, 3rd Party SDK Integration, SQLite, MySQL, Firebase Cloud Firestore, Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio, Mapbox, HealthKit, Google Analytics , Native Android App Developer, iOS App Developer, Cross-Platform Flutter App Developer, Top Flutter Developer,
$16/hr
100%
Job Success
$200K+ earned
Offers consultations
Start of list.
End of list.
I build native and cross-platform mobile apps for startups and businesses: from consumer apps to SaaS and CRM platforms that need a mobile-first experience. Top Rated Plus (top 1% on Upwork), 100% Job Success Score, 40+ mobile apps shipped and live on the App Store and Google Play.
Most clients come to me with one of two needs: a mobile app built from scratch and ready to ship, or an existing web/SaaS product that needs a native mobile companion app. Here's how I handle both :-
- I scope the app architecture before writing code, so you get a clear plan and timeline upfront instead of surprises mid-build.
- I build primarily in Flutter and React Native for cross-platform speed, or native iOS/Android when performance demands it backed by Node.js/NestJS and PostgreSQL or Supabase on the backend, so the app you launch with is the same one that can scale.
Recent mobile work:
1) StrongBee (Fitness & wellness marketplace): Built a two-sided mobile platform: trainer search & booking, workout tracking, activity summaries, social features, in-app credits. Shipped as linked consumer + trainer apps, live on iOS and Android.
2) Mumba Cloud (SaaS employee engagement platform): Built the native mobile companion apps (iOS & Android) extending a web SaaS product into daily employee use.
3) Statzo (Sports analytics app): Built a football stats-tracking mobile app live on both the App Store and Google Play.
4) Phase Focus / Monk Card (Digital wellbeing, NFC-based): Built an iOS app using NFC-trigger activation: tap a physical card to enable custom focus profiles that restrict distracting apps, with built-in usage tracking.
What I build:
- iOS & Android apps (Flutter, React Native, native)
- Mobile apps for SaaS platforms — companion apps, admin-on-the-go, real-time sync
- CRM & business tool apps with mobile-first workflows
- MVPs built for founders who need to launch fast on both stores
- AI features inside mobile apps — chat, voice, AI assistants
- App Store & Google Play deployment, from build to publish
Tech stack: Flutter, React Native, Swift, Kotlin, React, Next.js, Node.js, NestJS, PostgreSQL, Supabase, Firebase, AWS
I give daily or milestone-based updates so you're never chasing a status report, and I stay on for support after launch, most clients come back for the next feature rather than hiring someone new.
Tell me what you're building and I'll tell you honestly whether it's a fit, and how I'd approach it, before you spend a dollar.
Associated with
NetScape Labs Infotech Private Limited
$35/hr
100%
Job Success
$60K+ earned
Available now
Offers consultations
Start of list.
End of list.
Senior backend engineer with 15+ years of hands-on experience. Also ship mobile (Flutter, React Native, Kotlin, Swift) and web (React, Next.js, NestJS) through AI-assisted workflows using Codex, Claude Code, and Cursor.
Core strength:
- C# / .NET: ASP.NET Core, ASP.NET MVC, WinForms, WPF, Entity Framework, EF Core, LINQ, Dapper, Windows Services, .NET Framework 2.0 through .NET 8
- SQL Server: 2000-2022, T-SQL, stored procedures, query tuning, indexing, performance optimization
- Architecture: CQRS, DDD, SOLID, Clean Architecture, Repository Pattern, Microservices, Event-Driven
AI-assisted delivery:
Mobile (Flutter, React Native, Kotlin, Swift) and AI features (OpenAI API, LangChain, LangGraph, RAG, MCP exploration) are shipped via Codex, Claude Code, and Cursor. I drive architecture, specs, diff review, QA, and deployment. AI accelerates the non-C# syntax. I am transparent about which stacks I write directly vs. which I deliver via AI tooling.
What I've built and shipped:
- WinRest POS: 20+ year production C# .NET codebase. I maintain and extend it with Uber Eats, Clover, Moneris GO, SkipTheDishes integrations. OAuth 2.0, webhooks, zero-downtime deployments.
- GrocerKey: ASP.NET Core multi-tenant e-commerce for 10+ US grocery retailers (Fareway, Kowalski's, Stew Leonard's). CQRS, EF Core, Stripe, RabbitMQ, ElasticSearch, SignalR. Eliminated peak-traffic EF query timeouts.
- Pepsi Cola Primary Sales MIS: C# WinForms + SQL Server. Reduced year-end closing from 2+ days to under 1 hour via optimized stored procedures.
- 35+ mobile apps shipped to App Store and Play Store (Flutter, React Native, Kotlin, Xamarin)
- ExtraMiles Loyalty Suite: 5 NestJS microservices + Next.js admin + Flutter consumer app + POS terminal
- Pt Pal: HIPAA-compliant physiotherapy app (ML Kit, CameraX, BiometricPrompt)
- 6 self-published Chrome extensions (ScreenSolver with OpenAI vision API, Daraz Smart Shopper, Upwork Job Insights, and more)
- 2 Custom GPTs published on OpenAI platform
Trader companion & utility apps:
Position sizing calculators, Forex session trackers, signal alerts, stock lookup tools — StoreKit 2, Play Billing, subscriptions, IAP.
Industries: Restaurant POS & Food Delivery, E-Commerce & Retail, Healthcare
(HIPAA), Loyalty & Rewards, Enterprise SaaS, Trader Companion Utilities, Legal Tech.
Availability: 9 AM - 11 PM PKT (UTC+5). Full 8-hour overlap with UK / EU / Middle East. 4-5 hour morning overlap with US East & Central. 40+ hrs/week.