Hire the Best Data Scientists
in Romania

Most voice AI demos break on the first real call. Mine don't. As an experienced ai developer and AI Engineer, I build systems that handle 50+ calls/night at $0.10 each — where customers genuinely can't tell it's not a person. 📩 Send your project brief - I'll reply within 2 hours with a concrete action plan. 🏆 Why work with me? 🥇 Technical Reviewer for Manning Publications (Efficient AI in Practice & Enterprise RAG). 🥇 Winner of the Enterprise RAG Challenge. 🥇 Top-Rated AI Developer on Upwork with a focus on ROI. 🥇 Expert LLM Engineer specialising in hallucination-free RAG systems. Core Specialisations ❇️ AI Voice & Chatbot Development As a specialised ai developer, I build full voice pipelines: Deepgram/Whisper → GPT-4/Claude → ElevenLabs. Expert in chatbot development and conversational business logic for WhatsApp, Telegram, and Web. I work as a dedicated chatbot developer integrating systems with ManyChat, Botpress, and OpenAI API. Modern chatbot development setups to act as a 24/7 sales engine and support lead. ❇️ AI Agent Architecture & Autonomous Workflows I am an AI developer who excels in AI Agent architecture using LangGraph and CrewAI. Multi-AI Agent systems for lead generation, deal tracking, and complex CRM automation. Autonomous AI Agent workflows connected to Slack, Shopify, and enterprise backends. Every AI Agent I build is designed to scale and optimise business processes without increasing headcount. ⚙️ LLM Engineering & Advanced RAG As a senior LLM Engineer, I solve the "hallucination problem" for modern enterprises. Advanced LLM pipelines designed with a focus on Vector Databases (Pinecone, Weaviate, Milvus). Custom fine-tuning, prompt engineering, and production-ready LLM infrastructure. 🛠️ FULL-STACK TECH STACK & DATA SCIENCE As an AI Developer: Python, FastAPI, Docker, AWS, Asyncio. As a Python Developer: LangChain, LlamaIndex, LangGraph, PyTorch. As a Web Developer: Frontend frameworks, responsive platforms, and API integration. As a Data Scientist: Advanced data processing, analytics pipelines, and model evaluation. ❇️ WHAT YOU GET WITH EVERY PROJECT When you hire me as your AI developer, you get production-ready, scalable, and cleanly documented code. As a professional Python Developer, I ensure your system is robust, while my background as a data scientist guarantees that your data is processed with maximum analytical precision. Whether it's complex chatbot development for support or an AI Agent workflow for outbound sales, I handle the full CI/CD deployment on AWS. As a skilled web developer and agentic ai developer, I ensure your user interfaces are as smooth as the underlying AI models. By combining the precision of a data analyst with the agility of a Python full stack developer, I create applications that are data-driven. Every Python full stack developer setup I deploy is fully integrated with analytical tools, meaning a data analyst or data scientist on your team can easily track performance. 🌐 EXPERTISE ACROSS THE spectrum Whether you need a high-performance chatbot developer to automate customer service or a senior LLM expert to architect complex RAG systems, I deliver code that scales: For Enterprises: I act as a Lead Python Developer and machine learning consultant, building autonomous workflows. My skills as a data scientist allow me to extract valuable insights from your historical enterprise data. For Startups: As a python full stack developer and agentic ai developer, I focus on rapid deployment of AI Bot solutions. I leverage modern frontend and backend practices as a capable web developer. For Deep Tech & Analytics: My work as a data scientist and machine learning specialist ensures your systems are backed by solid statistics. From predictive modeling as a data analyst to implementing heavy machine learning algorithms, I cover all your data needs. From simple Python Developer scripting to high-level architecture, my goal is to provide Enterprise AI solutions that offer a clear ROI. If you are looking for a Senior Python Developer who understands both the business logic and the technical architecture, let’s connect. As a web developer and chatbot developer, I create complete digital ecosystems. My machine learning pipelines and python full stack developer practices ensure your software is future-proof, while my experience as a web developer guarantees flawless deployment. This unique blend of a python full stack developer skillset makes me the ideal partner for your next project, seamlessly combining the strengths of a data analyst, a machine learning engineer, and a certified data analyst. 👉 Send me your project brief — I’ll get back to you within 2 hours with a free AI visibility audit. Last update: 01.06.2026

👋 Need a python Full stack developer and Python AI Developer who can ship production-ready AI products, not just prototypes? I'm Roman, a Python Full stack Developer and Python AI developer with 5+ years in scalable web development and 2+ years in AI/ML. I have built AI systems for skincare, corporate LMS, real estate and SaaS, including a multilingual assistant for a company with 100+ branches and an AI SaaS chatbot platform built over 11 months. What I can help with: ✓ AI chatbot development with RAG, memory and business logic ✓ OpenAI / Claude / LLaMA integrations for SaaS, CRM, support, and internal tools ✓ AI agents trained on company documentation, knowledge bases, and enterprise data ✓ python fastapi API development for scalable AI backends ✓ React / Next.js dashboards connected to Python AI systems ✓ Database architecture, API integration, cloud deployment, and performance optimization ✓ Custom machine learning workflows, benchmarking, data pipelines and analytics ⚡My work combines python full stack engineering, python fastapi backends, LLM architecture and business-focused delivery that reduces manual work and improves user experience. As a python full stack developer, I build full-cycle products from database design and API architecture to React / Next.js interfaces, deployment and long-term optimization. My core stack includes python full stack, Python Fastapi, Flask, Node.js, React, TypeScript, PostgreSQL, MongoDB, Supabase, AWS, Azure, Vercel, REST APIs, WebSockets, Tailwind CSS, and Material UI. As a Python AI Developer, I create AI chatbots, RAG systems, AI agents, document intelligence tools, recommendation engines, and automation workflows. I work with OpenAI, Claude, LLaMA, LangChain, LangGraph, LlamaIndex, vector databases, prompt engineering, ReAct agents, and llm integration for real business use cases. 🤖 AI/ML Solutions I Build 📌 LLM-Powered Applications → Custom AI chatbots with RAG (Retrieval-Augmented Generation) → Multi-agent systems using LangChain & LangGraph → Context-aware conversational AI that maintains conversation flow → Integration with GPT-4, Claude, LLaMA models 📌 Intelligent Automation & Agents → ReAct systems (Reasoning + Acting) for complex workflows → Document parsing and knowledge extraction (LlamaIndex) → AI agents trained on internal documentation and enterprise data → Multi-language support with automatic language detection 📌 Smart Recommendations & Analysis → AI-powered recommendation engines → Image analysis and classification systems → Custom ML models for specific business use cases → Performance optimization for production environments 📌 Full-Stack Integration → RESTful API development and integration → Real-time data handling with WebSockets → Database design (PostgreSQL, MongoDB, Supabase) → Cloud deployment (AWS, Azure, Vercel) 💡 Recent AI Projects & Real Results Recent work includes an AI skincare recommendation system that analyzes customer inputs and recommends products, a corporate LMS AI assistant for 100+ branches, a real estate rental assistant using landmarks and neighborhoods instead of only addresses, and a full-stack SaaS AI chatbot platform with multi-agent logic and RAG capabilities. 🛠️ Technical Stack My experience covers both product engineering and AI development. On the engineering side, I build SaaS platforms, dashboards, APIs, admin panels and automation systems as a python full stack developer ( backend python developer ) backend developer and web developer. On the AI side, I work as a Python AI developer and AI Developer, supporting chatbots, RAG systems, llm integration, OpenAI workflows, benchmarking, machine learning and data science tasks for real business use cases. ⚡My approach is simple: clarify the business problem, design cost-conscious architecture, build clean and maintainable code, show progress through regular demos, and transfer knowledge so your team can use and maintain the system confidently. Additional relevant experience: I have worked around startup products and teams involving laravel, wordpress, sharepoint, moodle lti, flutter, material ui, html front end, payment gateway, back end development, full stack developer react, full stack java, marketing saas, mls, mls idx, real estate photo, ai video, crypto bot, trading python, dask, pandas, data entry, oxwall, qa analyst, ux designer, product manager, it consultant, seo specialist, journalist content workflows, technical resume writing, python full stack, python fastapi, python ai, llm integration, openai, and custom business automation. 🤝If you need a reliable python full stack developer who can own the full product workflow, or a python ai developer who can build practical AI systems with python fastapi, python ai, llm integration, openai, and scalable architecture, send me a message and let’s discuss your project.

The cool thing about data is that it can tell you everything you need to know about your business. The not so cool thing about data is that it can tell you nothing or tell you the wrong things about your business. My role as a data analyst is to help you extract the stories and insights that are relevant and rich in meaning for your business. I strive to achieve this through a number of ways: ✅ Organize the datasets Nobody likes working in a messy environment. Why should it be different with data? Datasets can be huge and cleanliness and good organization are mandatory. ✅ Make datasets beautiful It should be easy to read the data. Consistent and clean formatting doesn't only ensure correct data structures, it also makes it easier to work with. ✅ Make the collection of data an easy process Today every business works with large datasets and the more it can get, the better. The collection of data can be a nightmare, though. Getting your datasets from the platforms and tools you use to run your business should be automatic, consistent and done as fast and as frequently as possible, instant ideally. ✅ Tell stories, don't just show charts It's part art, it's part technical knowledge. This is probably the highest challenge for any data analyst and data scientist. Telling the relevant stories, unearthing the interesting insights will always be the most interesting part of my job 🖤 My experience with data analytics spans over 5 years of working with Excel, PowerBI, Google Spreadsheets, Google Data Studio. I've worked with social media datasets from platforms like Facebook and Google Analytics. I've also worked with real estate, financial, payroll, online shops, and platforms like Amazon, Shopify datasets. I've automated processes with Excel-VBA, Microsoft Automate, Google scripts. I'm currently intensively learning Python, Pandas, Matlab and other relevant libraries that go together with it.

Data Scientist & Software Engineer Specializing in AI, Machine Learning, and Data Scraping I hold a Bachelor's degree in Computer Science from Politehnica University of Bucharest and am currently pursuing a Master's degree. My technical proficiencies include Python, Keras, PyTorch, Selenium, and Beautiful Soup Artificial Intelligence & Machine Learning: Experienced in developing and implementing models for various applications. Data Scraping: Proficient in extracting and processing data from diverse web sources using tools like Selenium and Beautiful Soup. I am committed to delivering high-quality solutions and am eager to collaborate on projects that leverage my expertise.

Interested in data anaysis, visualisation, ETL Python developer Experience with NLP, Computer Vision, Classification, Regression Good knowledge of Microsoft Word, Power Point, Excel

Hi, I'm Bogdan👋 AI engineer with 9+ years of experience crafting voice AI and automation systems that boost revenue and cut costs. From growing user bases to 35K+ monthly users for a $42,000/month revenue company to slashing operational expenses by 60% for a $19.2M company, I deliver measurable results. Key milestones in my journey include: Voice AI & Automation: -> I helped a €19M transportation company develop a 24/7 AI voice agent that handles 500+ daily bookings, adding 10–15 extra reservations per day (~$1,500 in daily revenue) -> For the same company, deployed an AI voice agent for off-hour support, cutting costs by 60% and adding €5,000 in new monthly reservations. -> For the same company automate voice confirmation calls, replacing 2 of 3 staff, saving €2,000/month, and unlocking €15,000/month in extra revenue through improved seat availability. AI-Driven Solutions: -> I helped Stailer (35k monthly users beauty platform) design and deploy an AI-based onboarding workflow, reducing manual input time from 30-60 minutes to just a few seconds to minutes, by analysing unstructured data -> For the same company, implemented a WhatsApp-based appointment scheduling agent, by leading a team of three software engineers . This solution automated the booking process, handling over 30-40 new appointments daily and reducing friction between clients and professionals. Specialized AI Projects: -> I helped a U.S. startup competing with Intel/NVIDIA speed up neural networks 10× by applying quantization, pruning, and compilation over one year via an outsourcing firm. -> I helped a blockchain-based navigation app with 100K+ downloads enable real-time hazard detection by building an on-device object detection system. -> I led a team of three software engineers to develop an AI-driven surveillance system over the course of one year, resulting in securing a €100,000 grant as one of the top finalists in a highly competitive contest. Training & Innovation: -> I created over 50 hours of in-depth machine learning video content, directly teaching 30+ online and 270+ offline students, while reaching 2,000+ newsletter subscribers and actively advancing the community’s technical expertise. -> I led a research initiative that achieved state-of-the-art results in a Kaggle competition, resulting in a published paper in Nature Scientific Reports titled “Improving Robustness of Automatic Cardiac Function Quantification from Cine Magnetic Resonance Imaging Using Synthetic Image Data. -> I authored over five patent applications that describe novel deep learning algorithms for healthcare applications, reinforcing intellectual property strength and driving technological innovation in the medical industry. Proficient in Python, Langchain, Langraph, CrewAI, FastAPI, Render, VAPI, PyTorch, AWS, Postgres.