You will get Full Stack Developer for AI SaaS React Next.js Python and API Integration
Rising Talent
Project details
❗𝗕𝗘𝗙𝗢𝗥𝗘 𝗕𝗨𝗬𝗜𝗡𝗚 𝗧𝗛𝗜𝗦 𝗣𝗥𝗢𝗝𝗘𝗖𝗧 𝗣𝗟𝗘𝗔𝗦𝗘 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗠𝗘 ❗ so I can review your requirements, architecture, integrations and scope.
I’m an AI Developer, Python Developer and Full Stack Developer building production-ready AI SaaS and Web Applications with Python, FastAPI, React, Next.js and API Integration.
🌟 RESULTS
– 35+ AI Agent Development projects
– 25+ AI Chatbot Development projects
– 20+ AI Automation systems
– 15+ RAG and Enterprise RAG solutions
– 10+ Voice AI systems
– Up to 55% less manual work through automation
– 40%+ faster lead qualification
– 35%+ higher RAG accuracy
– Full Stack AI applications with Python, React, Next.js and FastAPI
– Production systems with APIs, databases, authentication and cloud deployment
AI Developer, AI Engineer, Python Developer, Python Full Stack Developer, Full Stack Developer, Full Stack Developer AI, Full Stack Developer React, Full Stack Developer Next.js, React Developer, Next.js Developer, AI Software Developer, AI App Developer, SaaS Developer, Web Developer Python, Python Automation, FastAPI, React, Next.js, TypeScript, API Development, API Integration, Machine Learning, Artificial Intelligence.
I’m an AI Developer, Python Developer and Full Stack Developer building production-ready AI SaaS and Web Applications with Python, FastAPI, React, Next.js and API Integration.
🌟 RESULTS
– 35+ AI Agent Development projects
– 25+ AI Chatbot Development projects
– 20+ AI Automation systems
– 15+ RAG and Enterprise RAG solutions
– 10+ Voice AI systems
– Up to 55% less manual work through automation
– 40%+ faster lead qualification
– 35%+ higher RAG accuracy
– Full Stack AI applications with Python, React, Next.js and FastAPI
– Production systems with APIs, databases, authentication and cloud deployment
AI Developer, AI Engineer, Python Developer, Python Full Stack Developer, Full Stack Developer, Full Stack Developer AI, Full Stack Developer React, Full Stack Developer Next.js, React Developer, Next.js Developer, AI Software Developer, AI App Developer, SaaS Developer, Web Developer Python, Python Automation, FastAPI, React, Next.js, TypeScript, API Development, API Integration, Machine Learning, Artificial Intelligence.
Programming Languages
PHP, JavaScript, PythonCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$41
|
Standard
$9,999
|
Advanced
$19,000
|
|---|---|---|---|
| Delivery Time | 1 day | 31 days | 62 days |
Number of Revisions | 0 | 2 | 4 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | - | ||
Source Code | - |
4 reviews
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DN
Denys N.
Aug 17, 2026
AI Developer | AI Agent Engineer | LangGraph, RAG, LLM, MCP & Multi-Agent Systems
Really enjoyed working with Roman! He clearly knows his stuff when it comes to AI and building complex AI systems, and it was easy to trust his decisions throughout the project. Communication was always quick and straightforward, and the whole process went really smoothly. I’d be happy to work with him again.
YT
Yaroslav T.
Aug 13, 2026
AI Developer & AI Automation Engineer | AI Agents, n8n, Make, API Integration
Really enjoyed working with Roman. He took the time to understand how our current processes work and put together a very detailed and practical implementation plan for us.
I also liked that he was realistic about where AI would actually be useful and where a simpler automation would make more sense. It made the whole plan feel much more practical and easier to follow.
Communication was easy, the work was thoughtful and well structured, and the final result gave us much more clarity on the next steps. We’ll definitely come back to Roman to continue the implementation.
I also liked that he was realistic about where AI would actually be useful and where a simpler automation would make more sense. It made the whole plan feel much more practical and easier to follow.
Communication was easy, the work was thoughtful and well structured, and the final result gave us much more clarity on the next steps. We’ll definitely come back to Roman to continue the implementation.
DN
Denys N.
Aug 9, 2026
30 minute consultation
Working with Roman was a great experience. He has strong knowledge of AI and helped me choose the right solution for my project — he explained the options, the possible risks, and the next steps in very simple words. Very happy with the result and I will definitely work with him again!
EF
Etienne F.
Aug 4, 2026
Expert RAG Developer (OCR, Fine-Tuning, White-Label Front-End) – End-to-End Project
Roman and Danys did an excellent job developing a RAG solution for law firms, within a project that came with many technical constraints and evolving requirements.
There were several last-minute changes, and my end client was particularly demanding, detail-oriented, and attentive to technical subtleties. Roman and Danys handled these challenges very well, adapting quickly while maintaining a high level of quality.
What I especially appreciated was their ability to communicate complex technical nuances clearly and effectively. They were responsive, professional, and reliable throughout the project.
I’m very satisfied with the collaboration and would gladly work with them again.
There were several last-minute changes, and my end client was particularly demanding, detail-oriented, and attentive to technical subtleties. Roman and Danys handled these challenges very well, adapting quickly while maintaining a high level of quality.
What I especially appreciated was their ability to communicate complex technical nuances clearly and effectively. They were responsive, professional, and reliable throughout the project.
I’m very satisfied with the collaboration and would gladly work with them again.
About Roman
AI Developer AI Automation Engineer AI Agent Builder AI LLM Chatbot
100%
Job Success
Lviv, Ukraine - 10:40 pm local time
⭐️ 7+ years in Software Engineering & Python Development
🧩 35+ AI Agent projects · 25+ AI Chatbots · 20+ AI Automation systems
🚀 15+ RAG systems · 10+ Voice AI systems
📌 Built for production, not just a good demo
I’m an AI Developer, AI Engineer, Python Developer and Full Stack Developer with 7+ years across Software Engineering, Python Development, Machine Learning, Data Science and Full Stack Development.
🏆 AI RESULTS
• 35+ AI Agent Development projects across Customer Service, AI Lead Generation, Fintech, HR, Property Management and SaaS
• 25+ AI Chatbot Development projects for web, WhatsApp, Telegram, SaaS onboarding and technical support
• 20+ AI Automation and Workflow Automation systems with n8n, Make, Zapier and API Integration, reducing manual work by 55%+
• 15+ RAG and Enterprise RAG systems for Legal, Healthcare, Finance, Compliance, Technical Support and Enterprise Knowledge Bases
• 35%+ higher RAG accuracy through Semantic Search, Source Citations, Retrieval Optimisation, reranking and better context handling
• 10+ Voice AI Agent and AI Receptionist systems for Customer Service, scheduling, lead qualification and phone automation
• 40%+ faster lead qualification through AI Sales Agent, CRM Automation, outreach workflows and AI Lead Generation
• AI and Document AI workflows for OCR, Data Extraction, Document Processing, compliance review, claims, contracts and financial documents
• Full Stack AI applications built with Python, FastAPI, React, Next.js and TypeScript, covering Full Stack Development, API Integration and cloud deployment
🛠️ WHAT I BUILD
✅ AI AGENT DEVELOPMENT & AGENTIC AI
As an AI Developer, AI Engineer and AI Agent Developer, I build Agentic AI systems with Tool Calling, Memory, Planning, Decision-Making, Structured Output and Human-in-the-Loop approval. My work covers AI Agent Development, AI Agent Automation, AI Agent RAG, Multi-Agent Systems, LangGraph, LangChain, MCP and Long-Term Memory.
✅ AI AUTOMATION & WORKFLOW AUTOMATION
As an AI Developer, AI Automation Engineer and Python Developer, I build Python Automation, n8n Automation, Make Automation, Zapier Automation, CRM Automation, Email Automation and Business Process Automation. I connect OpenAI, Claude, Gemini, HubSpot, Salesforce and GoHighLevel through API Development, API Integration, REST APIs, webhooks and OAuth for AI Lead Generation, Business Development, Sales Agent and Customer Service workflows.
✅ AI CHATBOT, VOICE AI & CONVERSATIONAL AI
As an AI Developer, AI Chatbot Developer, OpenAI Developer and Conversational AI Developer, I build OpenAI Chatbot, GPT-3, WhatsApp Chatbot, RAG Chatbot, Voiceflow Chatbot, Rasa Chatbot, Botpress and Chatbot SaaS solutions. I also build Voice AI Agent and AI Receptionist systems with Retell AI, Vapi, Twilio, ElevenLabs and Deepgram.
✅ LLM ENGINEERING, RAG & DOCUMENT AI
As an AI Developer, LLM Engineer and RAG Developer, I build LLM RAG, Enterprise RAG, RAG Assistant, Document Q&A and Enterprise Knowledge Base systems using Vector Databases and Semantic Search. My work includes Prompt Tuning, Context Engineering, Hallucination Reduction, Knowledge Graphs, Document AI, OCR, Data Extraction and AI Model Integration with LangChain, LangGraph, LlamaIndex, Pinecone, Weaviate, Qdrant and pgvector.
✅ PYTHON, FULL STACK, REACT & NEXT.JS DEVELOPMENT
As an AI Developer, Python Developer, Python Full Stack Developer, Full Stack Developer and React Developer, I build AI backends, Python Bots and web applications with Python, FastAPI, React, Next.js, Node.js, JavaScript, TypeScript, PHP, SQL, HTML, CSS, CSS3, jQuery and Angular. My work covers Full Stack Developer React, Full Stack Developer AI, React Full Stack Developer AI, Full Stack Developer LLM, Full Stack Developer Next.js, React Development, React TypeScript, Next.js TypeScript, Python Full Stack, Python JavaScript and Web Developer Python.
✅ MACHINE LEARNING, DATA SCIENCE & SOFTWARE ARCHITECTURE
As an AI Developer, Machine Learning Engineer, Data Scientist and AI Data Engineer, I work with Data Analysis, Supervised Learning, Unsupervised Learning, Natural Language Processing, Python Scikit-Learn, Deep Learning, Computer Vision, Artificial Neural Network, Neural Network, TensorFlow and PyTorch.
I also handle Software Architecture & Design, Git, Docker, Amazon Web Services, AWS and Azure, including Python Developer AWS, AI Model Integration, testing and deployment.
Clients hire me as an AI Developer, AI Engineer, Python Developer and Full Stack Developer because I handle both the intelligence layer and the software behind it: AI architecture, Python backends, React applications, APIs, automation, databases, integrations and deployment.
👉🏻 Send your brief. I’ll reply within 2 hours with a free action plan.
Steps for completing your project
After purchasing the project, send requirements so Roman can start the project.
Delivery time starts when Roman receives requirements from you.
Roman works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements & Architecture
I’ll review the scope, define the Full Stack architecture, database, APIs, AI integrations and development plan.
Development & Integration
I’ll build the Python/FastAPI backend, React/Next.js frontend, integrations and required AI features.