Hire the Best Machine Learning Engineers
in Romania

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
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of Upwork by G2 peer reviewers
Viktor A.

Baia Mare, Romania

$35/hr
5.0
42 jobs

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, agentic AI developer, and machine learning consultant, building AI agent automation workflows. My skills as a data scientist extract valuable insights from your historical enterprise data via AI agent RAG pipelines. For Startups: As a python full stack developer and AI agent builder, I focus on rapid deployment of AI sales agent and AI voice chatbot solutions. I leverage modern frontend and backend practices as a capable web developer building AI agent SaaS products. For Deep Tech & Analytics: My work as a data scientist and machine learning specialist ensures your systems are backed by solid statistics. From predictive modelling as a data analyst to building generative AI agent and AI voice assistant systems, I cover all your data needs. From simple Python Developer scripting to AI agent creation, my goal is Enterprise AI solutions with clear ROI. If you need a Senior Python Developer and AI agent expert who understands business logic and architecture, let's connect. As a web developer and chatbot developer, I build digital ecosystems including WhatsApp AI chatbot and AI phone agent systems. My machine learning pipelines and python full stack developer practices ensure your software is future-proof. This blend of python full stack developer and AI agent N8N skillset makes me the ideal partner, combining a data analyst, machine learning engineer, and AI call agent creator. 👉 Send me your project brief — I’ll get back to you within 2 hours with a free AI visibility audit. Last update: 01.07.2026

  • Machine Learning
  • Deep Learning
  • Python
  • Artificial Intelligence
  • AI Agent Development
  • AI Development
  • AI App Development
  • LLM Prompt Engineering
  • Natural Language Processing
  • AI Chatbot
  • OpenAI API
  • Twilio
  • Data Science
  • LangChain
  • API Integration
  • AI Implementation
  • Claude
  • Chatbot Development
  • Twilio API
  • API
Vlad-Andrei T.

Timisoara, Romania

$30/hr
4.9
13 jobs

I'm an experienced AI and Machine Learning Engineer specialised in computer vision, deep learning and intelligent automation. I have hands-on experience in building and training custom machine learning models, I have a strong foundation in a variety of tools, including TensorFlow, OpenCV and PyTorch. My expertise extends to data processing, model annotation and full-stack development using Angular, .NET and Docker for scalable deployment. I am passionate about leveraging AI to create innovative and robust solutions and I'm an adept at building end-to-end solutions, from creating robust backend systems and preparing datasets to deploying production-ready applications.

  • Machine Learning
  • Deep Neural Network
  • Python
  • OpenCV
  • TensorFlow
  • Raspberry Pi
  • Java
  • C++
  • Computer Vision
  • Linux
  • Unix
Catalin B.

Sibiu, Romania

$30/hr
5.0
18 jobs

Passionate ML Engineer, Linux System Administrator and IT Operations Manager with an Open Source background. Using Vertex AI, GCP, Tensorflow, Linux technical knowledge, ITIL 4, Agile, Safe Scrum Master and soft skills to keep applications running and customers happy.

  • Machine Learning
  • Google Cloud Platform
  • Vertex AI
  • Linux
  • TensorFlow
  • ITIL
  • IT Infrastructure
  • IT Project Management
  • IT Management
  • IT Service Management
  • Linux Professional Institute
  • Linux System Administration
  • Cloud Computing
  • Artificial Intelligence
Alexandru G.

Jibou, Romania

$20/hr
5.0
14 jobs

Looking for a Professional LLM | GenAI | RAG | MCP | Machine Learning | Deep Learning | Python | Scraping Engineer with an emphasis on productivity? Let's talk! I am a Machine Learning Engineer with over 7 years working experience in various projects. I worked on NLP, LLM, Computer Vision, Time Series, Web Crawling projects in which I used a variety of technologies and frameworks: PyTorch, Python, TensorFlow, Selenium, Docker, AWS, DataIKU, etc. I also have experience as a Teaching Assistant / Tutor at the Computer Science Faculty, where I teach students subjects like: Artificial Intelligence, Intelligent Systems, Software Engineering and Fundamental Algorithms. ✅ Deep Learning 🔑, Machine Learning 🔥(Supervised & Unsupervised Learning), Bayesian Networks 📶 ✅ Teaching Assistant ⭐️(Intelligent Systems & Software Engineering & Fundamental Algorithms) ✅ Python ⚡️, PyTorch 💥Tensorflow, sklearn, pandas, numpy, Tensorboard, etc. ✅️ Genomics and pubmed data curration and processing using LLM agentic architectures ✅ Playwright | Selenium | BeautifulSoup ☄️, Browser Automation 🔝, Scraping, scripting. ✅ Passionate learner ✅ Enjoy helping others with my work and doing stuff that matters. ✅ smart worker If you are interested in working with someone passionate and willing to do things that matter and make a difference, then send me a message.

  • Machine Learning
  • Deep Learning
  • Neural Network
  • Python
  • Natural Language Generation
  • Natural Language Processing
  • PyTorch
  • Selenium WebDriver
  • Selenium
  • Application Release Automation
  • Automation
  • Data Scraping
  • Bot Development
  • Facebook
  • Web Crawling
Tamás I.

Miercurea-Ciuc, Romania

$65/hr
5.0
1 jobs

Hi, I'm Tamás. I build AI automation tools that eliminate repetitive work and solve problems you thought required human intelligence. I'm an AI engineer and founder who specializes in creating intelligent systems that work autonomously. I've built production AI tools serving 100,000+ users and raised $840k in funding turning automation ideas into real products. My passion is creating AI-powered automation that actually works in the real world. From autonomous drones that find injured people without human input to automated testing systems that catch bugs before deployment, I build tools that think and act independently. What I deliver: - AI automation tools that handle tasks end-to-end without human intervention - Intelligent testing and QA systems that automatically detect and report issues - Machine learning pipelines that process, analyze, and act on data autonomously - Custom AI agents and automation workflows using modern frameworks - RAG systems and intelligent assistants that automate knowledge work Technical expertise: Python, TensorFlow, Keras, Pandas, NumPy, FastAPI, Flask, n8n, React, Next.js, TypeScript, SQL What drives me is early-stage prototyping where I can explore creative ways to automate complex workflows. I excel at identifying repetitive processes, mapping technical constraints, and building AI tools that handle them automatically. Currently running Bugninja AI, focused on intelligent test automation, while taking on projects involving AI-powered automation, autonomous systems, and tools that reduce manual work through machine learning. Available for: automated testing systems, AI workflow automation, intelligent data processing pipelines, computer vision automation, custom AI tool development, and any challenge where AI can replace manual repetitive work.

  • Machine Learning Model
  • Artificial Intelligence
  • Data Analysis
  • Data Mining
  • Software Testing
  • Testing
  • QA Automation
  • Data Visualization
  • Data Processing
  • Software Architecture & Design
  • Software Development
Francu R.

Bucharest, Romania

$40/hr
5.0
2 jobs

I'm an AI engineer with 5 years of proven work experience: Data Science, NLP and Computer Vision. Worked in highly skilled teams for top customers like BMW, GoPro, Sony, Hyundai, Logitech and others. Some of the projects I worked on: One of the principal engineers for a large scale computer vison product in automotive industry. The product directly solves NCAP safety regulations, technology developed as part of this product: image classification, action recognition, images segmentation. Freelancer for a Medical Assistance application, fine-tuned the LLaMA 3 model on specialised medical data, incorporating Retrieval-Augmented Generation (RAG) techniques to enhance contextual accuracy during inference. The workflow utilised AWS and SageMaker for training and deployment, with QDrant for data storage and Comet for versioning training artefacts and metric. Principal engineer for an end-to-end recommendation system with application in educational field, as system will recommend customized homework for each student based on their level and the difficulty assigned by the teacher. Strong engineering skills, backed by an academic background in mathematics and computer science, further specialized in AI and Data Science. This combination give me the expertise necessary for delivering high-quality, cutting-edge products.

  • Machine Learning
  • Deep Learning
  • Deep Neural Network
  • Computer Vision
  • Data Science
  • Python
  • Deep Learning Modeling
  • Data Analysis
  • Artificial Intelligence
  • English

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