You will get OpenAI/ChatGPT API Integration into Applications

Project details
Hi, I'm a senior full-stack & AI developer specializing in mobile apps (React Native, Flutter, iOS/Android), web apps (Next.js, Laravel, Node.js), custom APIs, and production-grade AI solutions. With 7+ years delivering 150+ successful projects on Upwork and Fiverr, I help startups and businesses add smart AI features that boost user engagement by 3x–5x and cut operational costs.
Whether you need a smart AI chatbot, intelligent search, content generator, RAG system, or any custom GPT-powered feature I deliver clean, secure, scalable integrations that just work.
What you get
• Full OpenAI ChatGPT / GPT-4o / o1 / Assistants API integration
• Custom prompts & fine-tuning for your exact use case
• Secure API key management (never hard-coded)
• Streaming responses, memory/context management, function calling
• Beautiful UI components (chat widgets, voice, image analysis, etc.)
• Cost optimization & usage monitoring dashboard
• Full testing, documentation & 30-day post-launch support
Whether you need a smart AI chatbot, intelligent search, content generator, RAG system, or any custom GPT-powered feature I deliver clean, secure, scalable integrations that just work.
What you get
• Full OpenAI ChatGPT / GPT-4o / o1 / Assistants API integration
• Custom prompts & fine-tuning for your exact use case
• Secure API key management (never hard-coded)
• Streaming responses, memory/context management, function calling
• Beautiful UI components (chat widgets, voice, image analysis, etc.)
• Cost optimization & usage monitoring dashboard
• Full testing, documentation & 30-day post-launch support
AI Algorithms
AlexNet, Autoencoder, Convolutional Neural Network, Gated Recurrent Unit, Generative Adversarial Network, Large Language Model, Radial Basis Function Network, Regression Analysis, Transformer Model, Variational AutoencoderAI Applications
AI Chatbot, AI Content Creation, AI Mobile App Development, AI-Enhanced Classification, AI-Generated Art, AI-Generated Music, Conversational AI, Facial Recognition, Image Upscaling, Machine Translation, Speech Synthesis, Time Series AnalysisAI Development Language
PythonAI Tools
Adobe Firefly, Azure OpenAI, Bing AI, GitHub Copilot, Hugging Face, Microsoft CNTK, NVIDIA AI Platform, PyTorch, Replit, StreamlitAI Models
AlphaCode, BERT, ChatGPT, DALL-E, GPT-3, GPT-4, GPT-Neo, Jurassic-2, LLaMA, Midjourney AI, OpenAI Codex, Stable DiffusionWhat's included
| Service Tiers |
Starter
$80
|
Standard
$500
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 21 days |
Number of Revisions | 1 | 1 | 2 |
AI Model Integration | - | - | |
Batch Normalization | - | - | - |
Database Integration | - | - | - |
Detailed Code Comments | - | - | - |
Image Upscaling | - | - | |
MLOps | - | - | |
Model Deployment | - | - | |
Model Documentation | - | ||
Model Monitoring | - | ||
Model Testing & Optimization | - | ||
Model Tuning | - | - | |
Natural Language Processing | |||
NLP Tokenization | - | - | |
Pre-Training | - | ||
Prompt Engineering | |||
Setup File | |||
Source Code |
Optional add-ons
You can add these on the next page.
Voice AI Integration
(+ 2 Days)
+$100
Image Analysis + DALL·E Generation
(+ 2 Days)
+$90
WhatsApp AI Chatbot
(+ 7 Days)
+$150Frequently asked questions
10 reviews
(10)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
AI
Asad I.
May 8, 2026
Senior Flutter & PostgreSQL Developer for Scalable Cross-Platform App with Advanced Backend
Delivered high-quality work with strong technical understanding of Flutter and backend architecture. Communication was smooth, deadlines were respected, and the freelancer proactively improved parts of the system beyond the original scope. Very reliable for complex mobile development projects and scalable application design. Would definitely recommend for future work.
AH
Ali H.
Apr 23, 2026
React Native Developer Needed for Feed App with Google Auth & AI Chatbot Integration
Good communication and strong skills. The project was completed smoothly without any issues. Would definitely recommend.
JB
Jeff B.
Apr 21, 2026
Senior Flutter Developer for Maps & Tracking
We had an excellent experience working with this senior Flutter developer. They successfully implemented advanced maps and real-time tracking features, delivering a smooth and highly responsive user experience. Their expertise with Google Maps API and native integrations was evident throughout the project, and they consistently optimized performance to meet our expectations. Communication was clear, deadlines were respected, and they approached every challenge with a practical, solution-oriented mindset. We highly recommend them to anyone looking for a reliable and skilled Flutter developer, and we would gladly collaborate again in the future.
AJ
Ahtisham J.
Apr 21, 2026
Flutter Developer for Payment Integration
Great experience working with the Flutter developer. They integrated the payment system seamlessly into our Firebase app, ensured strong security practices, and maintained clear communication throughout the project. Highly professional and detail oriented would definitely hire again.
MB
Maryam B.
Apr 16, 2026
Flutter Developer Needed to Redesign Healthcare App UI and Upgrade Flutter Version
Very impressed with the speed and quality. Flutter version upgrade is done properly, and the new UI has made my app much more user friendly, final result exceeded expectations in terms of usability because everything feels more stable and user friendly than before
About Hamza
Full Stack Developer | Mobile App Development | Flutter | React Native
100%
Job Success
Lahore, Pakistan - 1:09 am local time
I am the founder of RankDivine and WP Corporate, and I have successfully delivered 600+ projects to satisfied clients worldwide, including on platforms like Fiverr.
𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐏𝐫𝐨𝐜𝐞𝐬𝐬
Every project follows a clear, structured journey:
UI/UX Design → Frontend Development → Backend Development → Deployment → Post-launch Maintenance & Support (8 weeks)
This process ensures transparency, predictable delivery, and zero surprises.
𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲
• Mobile App Development | Flutter, React Native
• Frontend Development | React.js, Next.js, Angular
• Backend Development | Python, Node.js, NestJS, Django, FastAPI
• Full-Stack Web Development | Laravel, JavaScript, Python
• SaaS & MVP Development | From idea to launch with scalable architecture
• AI Development | Chatbots, LangChain, OpenAI integrations, LLMs & AI agents
𝐖𝐡𝐚𝐭 𝐲𝐨𝐮 𝐠𝐞𝐭
• Mobile, software & AI full-stack development
• Design to deployment
• Scalable, revenue-driven products
𝐖𝐡𝐲 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞
• 5+ years of experience in Software Development
• 500+ satisfied clients globally
• Proven results in ranking and product scaling
• Strong communication and long-term collaboration
• On time delivery with premium quality
𝐁𝐨𝐨𝐤 𝐀 𝗖𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻
I offer a 30-minute consultation to refine your idea, choose the right tech stack, and estimate scaling costs.
𝐌𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞 & 𝐋𝐨𝐧𝐠-𝐓𝐞𝐫𝐦 𝐒𝐮𝐩𝐩𝐨𝐫𝐭
You’ll get 8 weeks of free support, plus ongoing maintenance plans for future growth.
Let’s build, rank, and grow your digital product together.
Steps for completing your project
After purchasing the project, send requirements so Hamza can start the project.
Delivery time starts when Hamza receives requirements from you.
Hamza works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement gathering and understanding project goals
Technical planning and system architecture design