I'm a passionate data scientist with a strong foundation in statistics, programming, and storytelling through data. Whether you’re a business owner, academic researcher, or startup founder, I can help you transform messy datasets into clear, actionable insights.
🔍 What I Do Best:
Data analysis using Python (Pandas, NumPy, SciPy, Statsmodels) and R (dplyr, ggplot2, tidyverse)
Statistical testing: t-tests, ANOVA, chi-square, correlation, regression, etc.
Predictive modeling & exploratory analysis
Cleaning and preprocessing raw data
Clear, beautiful data visualizations using Matplotlib, Seaborn, Plotly, or ggplot2
Delivering well-commented code and concise summaries
🕒 Why Work With Me?
Fast turnaround
Excellent communication with fluent English
Attention to detail
Affordable rates (building Upwork experience)
Data Analysis
Machine Learning
Artificial Intelligence
Deep Learning
Alpha Testing
Beta Testing
Analytical Presentation
Data Extraction
ETL
Machine Learning Model
ETL Pipeline
AI Development
Video Editing
SQL
Boris D.
Zagreb, Croatia
$50/hr
5.0
11 jobs
I help teams ship useful AI, and teach their people to use it confidently. I’m an AI educator and consultant with five years of experience in EdTech creating courses and learning programs for Fortune 500 companies. My focus areas include NLP, Computer Vision, Time Series & anomaly detection, Edge AI, and Agentic AI.
What I do:
• AI enablement & advisory: clarify the problem, choose the right approach/tools, and outline a pragmatic roadmap.
• Course & training creation: curricula, micro-lessons, labs, projects, assessments, and facilitator guides tailored to your audience.
• Technical writing: tutorials, playbooks, articles, and documentation that are accurate, readable, and SEO-sound.
• Prototyping & analysis: decision-ready notebooks, lightweight demos, and visuals that de-risk bigger builds.
Deliverables
Complete curricula (outcomes → syllabus → lessons/modules → slides → scripts → Jupyter/Colab labs → datasets → rubrics → quizzes/exams → projects/capstones); hands-on workshops; executive briefs; technical articles; lightweight AI prototypes
Data Analysis
Machine Learning
Python
Deep Neural Network
Computer Vision
Machine Learning Model
Neural Network
Deep Learning Modeling
Data Visualization
Blog Writing
Ghostwriting
Tutoring
Marino T.
Zagreb, Croatia
$60/hr
5.0
4 jobs
I'm an ML/AI Engineer and Data Scientist with an MSc in Computer Science (Data Science) and 4 years of experience building and operating production-grade AI systems in the financial and crypto space. My background sits at the intersection of machine learning, financial systems, and software engineering. I don't just build models, I build the full systems around them that work reliably in production.
Projects:
📈 Crypto AI Trading System (Vicuna) — Founded and built an end-to-end crypto AI trading company from scratch. Designed and implemented the full pipeline: automated data ingestion from crypto exchanges, real-time data processing, custom-trained deep neural networks for predicting asset returns, trading logic and execution engine, risk management, and live monitoring. The system has been used to manage capital for real investors with a strong live track record.
🤖 Crypto bot platform (Terarium) — Independently designed and built a full-stack crypto trading bot SaaS platform. Built the complete backend trading engine, REST APIs, and frontend web application from the ground up — full product ownership from architecture to deployment.
☁️ Cloud Architecture — Utilities Platform (US Client) — Collaborated with a US-based utilities company to design an AWS cloud architecture blueprint for a cross-utility data sharing platform handling drone and aerial imagery. Gained deep exposure to scalable cloud system design and enterprise-level technical planning.
⚙️ Core expertise: Machine Learning · Deep Learning · Algorithmic Trading Systems · Data Pipelines & MLOps · Python · SQL/NoSQL · AWS · FastAPI · REST APIs · React
Data Science
Data Analysis
Machine Learning
Natural Language Processing
Python
Machine Learning Model
Quantitative Finance
Cryptocurrency
Artificial Intelligence
Microsoft Azure
Deep Learning
Statistical Analysis
Database
SQL
Ivan Ž.
Prelog, Croatia
$200/hr
5.0
18 jobs
🎓 8+ Years of Delivering Exceptional Value with NLP, LLM, and Chatbot Technology
⭐ Expert-Vetted - part of top 1% experts on Upwork
"𝗧𝗵𝗶𝗻𝗸𝗶𝗻𝗴 𝘆𝗼𝘂'𝗿𝗲 𝗹𝗮𝘁𝗲 𝘁𝗼 𝗔𝗜 𝘁𝗼𝗱𝗮𝘆 𝗶𝘀 𝗹𝗶𝗸𝗲 𝘁𝗵𝗶𝗻𝗸𝗶𝗻𝗴 𝘆𝗼𝘂'𝗿𝗲 𝗹𝗮𝘁𝗲 𝘁𝗼 𝘁𝗵𝗲 𝗜𝗻𝘁𝗲𝗿𝗻𝗲𝘁 𝗶𝗻 𝟭𝟵𝟵𝟲."
☎️ Get the Right AI Solution for Your Needs - Let's work together to pinpoint exactly what you need with a FREE 15-minute consultation.
Hi there! 👋
I'm Ivan, and I’m here to help you navigate AI with clarity and purpose. I make sure you only implement technology when it truly adds value, solving real problems rather than adding complexity.
𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲?
✅ Expertise in Solving Real Problems:
With over six years of experience in this new field, I've tackled complex projects across various industries. I design solutions that are scalable, secure, and efficient. Nothing is considered impossible without thorough exploration.
✅ Fast and Efficient Delivery:
I understand the importance of deadlines and budgets. My streamlined process, including timelines and regular demos, ensures you’re always informed and projects are delivered bug-free and on time.
✅ Clear Communication:
I prioritize transparent communication, actively listening and asking the right questions to fully understand your needs. You’ll always be in the loop with regular updates.
✅ Added Value Beyond Development:
I look for opportunities to add value, whether through pre-built solutions or custom features tailored to your business. My goal is to maximize efficiency and deliver results that matter.
✅ Long-term Partnership:
I’m committed to your success, offering ongoing support and maintenance as your business evolves. I stand by my work and remain available to assist, even years down the line.
𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆-𝗦𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗨𝘀𝗲 𝗔𝗜 𝗖𝗮𝘀𝗲𝘀 𝗜 𝗛𝗮𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗢𝗻:
🤝 Recruitment:
- AI Recruitment Copilot: Accelerated hiring with smarter candidate matching.
- CV Parser: Reduced manual effort by automating candidate information extraction.
- Job Description Parser: Streamlined job postings with accurate, AI-generated descriptions.
- Candidate Ranking Systems: Improved candidate selection by prioritizing the best fits.
🏥 Healthcare:
- Health Regulations Compliance Analysis: Minimized compliance risks through automated analysis.
- Health Recommendation Chatbots: Enhanced patient engagement with personalized AI-driven advice.
💼 Sales:
- Customer Review Analysis Tool: Unlocked insights from reviews to boost product satisfaction.
- SWOT Analysis: Informed strategic decisions with AI-driven analysis.
- Customer Persona Builder: Increased marketing effectiveness with detailed customer profiles.
📈 Marketing:
- Social Media Post Generator: Saved time and increased engagement with automated content creation.
- Thumbnail Analysis: Boosted click-through rates by optimizing visual content.
- Blog Generator: Streamlined content creation with automated, high-quality posts.
📊 Business Intelligence (BI):
- Document Processing with OCR and VLM: Improved document management with automated classification.
- Data Structuring and Formatting: Enabled faster, data-driven decisions with structured insights.
⚖️ Legal:
- Legal Document Analysis: Increased compliance and reduced errors with automated document structuring.
- Similar Document Recommendations: Accelerated legal research with AI-suggested related documents.
- Linking Legal Documents with Regulations: Ensured regulatory alignment, reducing compliance risks.
- FTC Compliance Analysis Tool: Protected businesses from legal issues with automated content reviews.
𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸:
- Programming Languages 🐍: Python, R
- Machine Learning 🤖: Tensorflow, Keras, PyTorch
- LLM 📝: HuggingFace, Mixtral, GPT-4o, LLama, Groq, Claude
- Chatbot tools 💬: LangChain, RAG, LlamaIndex
- Deployment 🚀: FastAPI, Streamlit, Flask, LangServe
- Vectorstores 🔢: Qdrant, Pinecone, Elasticsearch
- Version Control 🗃️: Git, Docker, LangSmith
- Cloud Platforms 📊: Azure, AWS, GCP, Heroku
𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗜 𝗢𝗳𝗳𝗲𝗿:
- First MVP in 2 Weeks: Get a functional MVP quickly to validate your idea.
- AI Strategy Planning: Develop a clear roadmap for implementing AI in your business.
- Solutions Proposal: Tailored solutions to meet your specific business needs.
- End-to-End Development: From ideation to deployment, I manage the full project lifecycle.
- Ongoing Support and Maintenance: Continuous support to ensure your AI systems evolve with your business.
- Access to DevOps Experts: Fast-track your project with my network of "plug-and-play" developers, especially if speed is a priority.
Thank you for considering me for your project. Hope we can work together. 🤗
Ivan
Data Science
Machine Learning
Natural Language Processing
Python
Deep Learning
Chatbot
GPT-4
ChatGPT
Artificial Intelligence
Generative AI
Elasticsearch
Mathematics
API
Azure OpenAI Service
LangChain
Denis S.
Selce, Croatia
$10/hr
5.0
1 jobs
Pozdrav,
trenutno sam student diplomskog studija Informacijske tehnologije u poslovnim sustavima, a završio sam i prijediplomski studij informatike. Tijekom studija stekao sam širok spektar znanja iz područja ICT-a, uključujući modeliranje podataka, izradu i upravljanje bazama podataka, te analizu i normalizaciju podataka.
Kao praktikant radio sam na razvoju web aplikacije za bolnicu, gdje sam sudjelovao u svim fazama projekta – od analize, dizajna i implementacije do produkcije. Radio sam i na serverskom i klijentskom dijelu aplikacije koristeći Node.js i Vue.js.
Za svoj završni rad razvijao sam AI model chatbota koristeći Rasa framework, što mi je omogućilo dubinsko istraživanje područja umjetne inteligencije, prikupljanje i obradu podataka, te implementaciju modela. Svi moji projekti dostupni su na mom GitHub profilu (link).
Već dugo me zanima analiza podataka, i želja mi je profesionalno se razvijati kao junior data analyst / data scientist. Smatram se analitičnom i preciznom osobom koja kontinuirano želi učiti i usavršavati svoje vještine u IT sektoru
Data Analysis
Data Mining
Analytical Presentation
Filip B.
Zagreb, Croatia
$25/hr
4.8
11 jobs
I am a data scientist with experience in building machine learning systems, testing and deploying to production. Proficient in Linux, also experienced in building websites and scaling appropriately.
- Extensive experience in building and optimizing machine learning models using Python.
- Setting up CI/CD/CT environments for model validation, building and deployment.
- API development using Flask and FastAPI
- Proficient in comprehensive data analysis, extracting valuable insights.
- Skilled in testing and deploying models to production.
- Expertise in creating visually appealing and responsive interfaces.
- Strong database integration and back-end development skills.
- Proficient in containerization and orchestration tools like Docker and Kubernetes.
- Experienced in AWS and GCP deployment.
Worked in both non-agile and agile teams, always willing to share knowledge and always open to communication and help.
Natural Language Processing
Kubernetes
Google Cloud Platform
Linux
Docker
Bash
PyTorch
Flask
RESTful API
Database Management System
TensorFlow
Computer Vision
Keras
Automation
Artificial Intelligence
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