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$60/hr
$30K+ earned
Offers consultations
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A flutter developer with extensive user experience design and entrepreneurial capabilities, I have deep experience working with various businesses and helping them reach their goals through providing their customers with best experience. My computer science studies at university of Clausthal in Germany gave deep insights of how to craft and architect different softwares using different technologies taking into consideration the available resources
I have been working in different projects that involved complex interaction with database, using AI, creating restful api as well as building clients apps via web and mobile technologies.
Associated with
SpringyUniverse
$10K+
earned
$90/hr
100%
Job Success
Available now
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- Amazon Alexa Champion 2023
- Winner of Amazon Alexa skills challenge : Alexa conversations 2020
- Nominated for Alexa emerging tech developer - Digital India awards by Internet and mobile association of India and Amazon Alexa 2018
- Winner of first-ever official Amazon Alexa hackathon India
Voice-enabled devices are taking over human efforts to get things done. I am here to help my clients design and develop Amazon Alexa skills or Google actions which will deliver delightful user experience.
I have worked with clients from Finance services, real estate, digital marketing, Healthcare, Education, Health and fitness, Podcast industries.
Designed and published more than 100 skills in Amazon Alexa skill store for clients across the globe.
I am an expert in designing Voice user Interface which helps deliver a delightful user experience on Amazon Alexa and Google Home.
Working with Amazon Alexa marketing team for skill promotion and beta feature development and implementation.
Working with Samsung Bixby team to design and develop Bixby capsules for clients and for Bixby marketplace.
Quality is best in the market !! Voice tech is the next industry disruptor so don't wait and get voice-first application for your brand/business/company asap.
$65/hr
$3K+ earned
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🚀 Senior Full-Stack & Mobile Engineer | React Native, React, AI, SaaS
I help startups and businesses turn ideas into polished, production-ready software.
Over the last 5+ years, I've built and shipped mobile and web applications used by thousands of users, working with startups ranging from Series A to Series B. My experience includes:
• Software Engineer at Extra (100k+ daily active users)
• Full-Stack Engineer at Emcee Studios
• Founder of Patriot App Builders, a software development agency focused on high-quality product execution
Whether you need an MVP, a new feature, AI integration, or help stabilizing an existing product, I can jump in quickly and deliver.
What I Build:
✅ Mobile Apps (iOS & Android)
✅ SaaS Platforms
✅ AI-Powered Products
✅ Startup MVPs
✅ Internal Business Tools
✅ Subscription & Marketplace Platforms
✅ API Integrations
✅ Product Improvements & Scaling
Recent Experience:
• AI-powered consumer applications
• React Native mobile products
• Payment systems (Stripe)
• OpenAI / ChatGPT integrations
• Authentication & user management
• Analytics and growth tooling
• Cloud-hosted applications
• End-to-end product development
Tech Stack:
Frontend: React, React Native, Next.js, TypeScript, JavaScript, TailwindCSS
Backend: Node.js, Express, PostgreSQL, MongoDB, MySQL, GraphQL
Cloud & DevOps: AWS, Firebase, Google Cloud Platform, Docker
Integrations: OpenAI, Stripe, Google APIs, Zoom, Twilio, and more
Why Clients Hire Me:
• Strong communication
• Fast execution
• Product-minded decision making
• Startup experience
• Ability to own projects end-to-end
📞 Free Product & Technical Consultation
If you're unsure about your roadmap, tech stack, architecture, timeline, or MVP scope, I'm happy to provide a complimentary consultation and help you build a practical execution plan.
Let's build something great.
$60/hr
100%
Job Success
$100K+ earned
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Welcome to my profile! I’m a mobile and cross-platform development expert with more than 10 years of experience in the field.
I am keen on cutting-edge technologies and helping businesses achieve their objectives. But, as a technical expert, I also embed my unique approach to working with clients:
Solid requirements analysis and elicitation
- Offering at least a couple of project scope realization options
- Visualization of the possible technical strategy in a format of a demo
- Enhancing your feature list with additional functionalities
- Addressing timeline and budget constraints with a minimum efficient scope realization
Recently I’ve been involved in a bunch of cross-platform researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide:
Technologies:
- Mobile OS: iOS, Android, Windows Universal
- Platforms: Flutter, PhoneGap, Cordova, NativeScript, ReactNative
- Languages: JavaScript, TypeScript, Dart
Domains:
- Retail
- Construction and Real Estate
- Aviation, Tourism, Travel
- Entertainment and Social networking
- Marketing and Advertising
- Fintech
- Insurance
- Engineering and Industrial
- eCommerce
- HoReCa
- Transport&Logistics
Project types:
- Mobile application
- Standalone module, Framework, SDK
- Proof of Concept
- Companion mobile app (to comply with an existing web/desktop software)
- Demo
I’m open to both consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss a mobile application idea, I am sure I will have valuable and interesting ideas to share with you!
Associated with
MobiDev
$30M+
earned
$80/hr
$50K+ earned
Available now
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I’m a senior software engineer with ~17 years in production systems and 9+ years working with clients on Upwork and off-platform. I originally worked here as a Salesforce developer; today my strongest leverage is Flutter: shipping complete mobile apps quickly, cleanly, and with good judgment.
I’m not a “junior Flutter specialist” and I’m not a large team. I’m the person you bring in when you need one senior engineer who can take ownership, make good architectural decisions, and actually finish things.
What I do best:
1. Build Flutter apps from scratch or take over existing ones
2. Turn vague ideas into concrete, working software
3. Move fast without creating messes you’ll regret later
4. Make pragmatic trade-offs instead of over-engineering
United States
$60/hr
$4K+ earned
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Experienced full stack developer building complete web applications and mobile apps with modern technologies. Expertise in React, Node.js, Python, and Flutter for end-to-end development solutions.
Full Stack Development Expertise
Specialized in creating scalable web applications and mobile apps from concept to deployment. Proven track record delivering complete solutions across frontend, backend, database, and mobile platforms for startups and established businesses.
Technical Skills
Frontend Development:
React.js with modern hooks, context, and state management
TypeScript and JavaScript ES6+
Responsive design with CSS, Tailwind CSS, and Material-UI
Single Page Applications (SPAs) and Progressive Web Apps
Backend Development:
Node.js with Express.js for REST APIs and microservices
Python with Flask and Django for web applications
RESTful API design and GraphQL implementation
Database design with PostgreSQL, MySQL, and MongoDB
Mobile Development:
Flutter for cross-platform iOS and Android apps
React Native for JavaScript-based mobile solutions
App Store and Google Play Store deployment
Mobile API integration and offline functionality
Cloud & DevOps:
AWS services: EC2, S3, RDS, Lambda, CloudFront
Docker containerization and deployment
CI/CD pipelines with GitHub Actions
Database management and optimization
Data & Visualization:
Interactive charts with Chart.js, D3.js, and Flutter charting libraries
Real-time dashboards and analytics platforms
Data processing and API development
Business intelligence and reporting systems
Recent Project Highlights
Full Stack Web Applications:
React frontends with Node.js/Express backends
User authentication and role-based access control
Real-time data dashboards with interactive charts
E-commerce platforms with payment integration
Admin panels and content management systems
Mobile Applications:
Cross-platform Flutter apps with API integration
Real-time monitoring and notification systems
Offline-capable apps with local data storage
Business productivity and data visualization apps
Backend Systems:
Scalable REST APIs serving web and mobile clients
Database design and optimization for high-performance applications
Third-party service integrations and webhook handling
Automated deployment and monitoring systems
Technology Stack
Frontend: React, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS
Backend: Node.js, Express.js, Python, Flask, Django
Mobile: Flutter, React Native, Dart
Databases: PostgreSQL, MySQL, MongoDB, SQLite
Cloud: AWS (EC2, S3, RDS, Lambda), Firebase, Heroku
Tools: Git, Docker, Webpack, npm/yarn, REST APIs, GraphQL
Proven Results
Delivered web applications and mobile apps with clean, maintainable code architecture. Apps published on major app stores with positive user feedback.
Specialties: API-driven applications, real-time data systems, e-commerce platforms, business dashboards, and complete end-to-end development.
$70/hr
$300+ earned
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Owais B.
has worked
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Every single day, your business is flushing money down the drain.
If you are a local business owner (Auto Detailer, Plumber, HVAC Contractor, Roofer, Med Spa Owner) or a fast-scaling agency, your biggest enemy isn't your competitor—it’s SLUGGISH RESPONSE TIME.
When you are busy under a car detailing a bumper, fixing a leaking pipe, or treating a patient, your phone rings. You miss the call. That prospect doesn't leave a voicemail; they immediately hang up and call the next business on Google. The exact same value leakage happens with unanswered Instagram DMs, Facebook messages, and webchat widgets.
I stop that leakage. I turn your missed calls, abandoned chats, and cold databases into booked appointments automatically, while you focus on doing the actual work and scaling your business operations.
🚀 CORE AUTOMATION SYSTEMS I BUILD TO FIX YOUR REVENUE LEAKAGE:
1. ⚡ AI Missed-Call Text Back (The Ultimate ROI Multiplier)
Missed a phone call while on a job site? Within 45 seconds, my system automatically fires a human-like, conversational text message to the prospect. It qualifies their problem, confirms your availability, and drops your live calendar booking link. You secure the job before they even think about calling a competitor.
2. 📲 Omni-Channel DM Closers (Instagram, Facebook & WhatsApp)
Stop losing hot leads to the inbox graveyard. I integrate ManyChat with OpenAI to instantly respond to "How much?", "Where are you located?", or "Available today?" inquiries. The AI guides the conversation organically, moving the prospect from a random social media comment into a confirmed appointment on your calendar on autopilot.
3. 🔄 High-Volume Database Reactivation (DBR Workflows)
Got a list of 500, 1,000, or 5,000+ past clients sitting completely dead in an old spreadsheet, Jobber, or legacy CRM? I design and execute smart, automated SMS and WhatsApp re-engagement waves. These workflows wake up your old customer base with highly targeted, no-brainer offers, completely filling your open calendar slots within 72 hours without spending a single dollar on new ads.
4. 🤖 Agentic Lead Qualification & Smart Triaging
Stop wasting hours on the phone with tire-kickers who don't have the budget. I build AI qualification agents that textually vet incoming leads by project scope, location, budget, and urgency before they are ever allowed to book a slot on your sales calendar. You and your team only show up to talk to serious, high-intent buyers.
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💼 INDUSTRY-SPECIFIC SOLUTIONS I DEPLOY:
• HOME SERVICES (HVAC, Plumbing, Roofing, Electricians): Instant emergency dispatch triage, automated booking via SMS, immediate integration with field management software to sync customer data, and automated invoice follow-ups.
• AUTO DETAILING & CERAMIC COATING: Visual quote-request estimators, instant photo-drop intake via messaging, automated maintenance reminders (e.g., "Your ceramic coating inspection is due!"), and automated Google Review requests post-service.
• MED SPAS & AESTHETICS CLINICS: High-converting Instagram DM appointment setters, complex multi-step consultation intake forms, automated no-show protections (SMS/Email sequence reminders), and loyalty membership retention workflows.
• REAL ESTATE & PROPERTY MANAGEMENT: 24/7 instant property inquiry handlers, automatic buyer/seller profiling, and instant calendar mapping for property walkthroughs and viewings.
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🛠️ MY TECHNICAL STACK & ARCHITECTURE:
• CRMs & Lead Hubs: GoHighLevel (GHL Snapshot Customization, Sub-Account Setups), HubSpot, Salesforce, ActiveCampaign.
• Field Operations Tech: Jobber, Housecall Pro, ServiceTitan.
• Automation & Logic Middleware: Zapier, Make dot com (Integromat), n8n.
• AI, Voice & Communication: OpenAI API (ChatGPT), ManyChat, Twilio, VAPI (Autonomous Voice AI Receptionists).
I pride myself on building clean, highly logical, and deeply tested systems. I don't just patch software together with fragile links—I map out fully redundant, production-grade business infrastructure that delivers measurable tracking, reduced headcount overhead, and undeniable ROI.
Stop losing high-ticket revenue every single time you miss a notification on your phone. Let’s build an automated workforce that handles your front desk 24 hours a day, 7 days a week, 365 days a year.
Please feel free to check out my portfolio section right here on this profile page to see my active system layouts, live workflow architectures, and visual case studies in action.
Send me a message today, and let’s jump on a discovery call to map out the exact automation blueprint for your business
United Kingdom
$60/hr
100%
Job Success
$200K+ earned
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Andrew T.
has worked
.
Software Engineer, with extensive experience developing mobile and web applications from the ground up. Comfortable working on all aspects of the full-stack, from UI design and implementation on the front-end to API and database integration and development on the back-end.
Back-end development specialities include API integration and development with GraphQL, RestAPIs, and authentication providers. Adept at both developing and maintaining highly scalable database solutions using PostgreSQL, MySQL, SQLite and DynamoDB amongst others. Multiple years of experience working with CMS providers such as WordPress and Strapi developing custom blogging platforms and eCommerce sites.
Front-end development specialities include React and React Native development, UI and UX design, and native web development using HTML, CSS, JS and TypeScript. Developing many projects past launch, I have thoroughly studied SEO and ASO, using this to develop applications that are optimized.
I have a First-Class Computer Science Degree from the University of St Andrews. Previously, I have worked in the Aerospace & Defence Industry, a sector where bad habits and low-quality code are simply not an option; a mentality that I maintain when working for my own clients. I am a relatively new freelancer, but I have had plenty of experience delivering high-quality software throughout my career. Thank you for taking the time to read this far.
Expertise:
React and React Native || HTML || CSS || JS || PostgreSQL || DynamoDB || WordPress || Strapi || GraphQL || RestAPI || Postgraphile || React Apollo || AWS Architecture || API Integration || SEO || ASO || Authentication APIs
$60/hr
$45 earned
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Need to build an intelligent mobile application that talks to your custom data, databases, or documents? I can build it from backend architecture to frontend UI.
I hold a Master's degree in Data Analysis and Artificial Intelligence from Hong Kong Baptist University and a Bachelor's in Software Engineering. I bridge the gap between AI development and cross-platform mobile apps—meaning you don't have to hire separate backend and mobile developers.
I specialize in building RAG (Retrieval-Augmented Generation) applications, integrating AI agents, and wrapping them in premium, high-performance Flutter mobile interfaces.
🛠️ MY TECHNICAL STACK:
• AI & Back-End: Python (FastAPI, Flask, LangChain, LlamaIndex)
• Vector Databases: Pinecone, ChromaDB, pgvector
• Mobile Front-End: Flutter, Dart (iOS, Android, Web)
• API Integrations: OpenAI (ChatGPT), Anthropic (Claude), Google Gemini
• Database & Cloud: PostgreSQL, Firebase, AWS
💼 FEATURED PROJECTS:
• AI Language Tutor App: Cross-platform Flutter app integrated with conversational LLMs for real-time translation and language tutoring.
• AI Wellness App: Built predictive ML models using biometric data to provide personalized health insights.
• Custom Mobile RAG: PDF and database querying via local/cloud vector search.
If you want an engineer who can turn complex AI capabilities into a smooth, native app that your users will love, click the green button to start a conversation!
United Arab Emirates
$200/hr
Available now
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🚀 Mobile App Developer (Flutter, React Native, Swift, Kotlin) | 5+ Years | Scalable Apps for Startups & SMEs
I build high-performance mobile apps that are clean, scalable, and ready for real users. With over 5 years of experience, I’ve developed end-to-end applications for startups, SMEs, and enterprise clients—from concept to App Store/Play Store deployment.
What I Do Best
📱 Mobile Apps: Flutter, React Native, Swift, Kotlin
🌐 Backend APIs: Laravel, Node.js, Firebase
🔗 Integrations: Payment gateways, Maps, Chat, Push notifications
🗄️ Database & Architecture: MySQL, Firestore, REST/GraphQL APIs
⚡ Performance Optimization: Fast, smooth UI/UX with clean code
Why Clients Hire Me
✔️ Strong communication & fast delivery
✔️ Can handle full projects (UI/UX → development → backend → deployment)
✔️ Understand business needs—not just coding
✔️ Write scalable architecture and future-proof code
Types of Projects I Build
On-demand apps (delivery, services, booking)
E-commerce mobile apps
Social & chat apps
Business apps for internal operations
Custom dashboards and admin panels
If you need a reliable mobile developer who delivers high-quality work and long-term support, let’s work together. Feel free to invite me to your job.