I help companies build reliable data infrastructure — from raw ingestion to clean, analytics-ready data — using modern tools like Snowflake, dbt, Fivetran, and Azure.
With 8+ years across data engineering, architecture, and consulting, I've worked across the full data stack: designing multi-source pipelines, migrating legacy SQL Server systems to cloud-native architectures, building dbt models from scratch, and delivering executive dashboards in Power BI and Tableau.
Recent work includes leading a team of data engineers at an IBM company, migrating a legacy analytics platform (StatPro) to a modern data stack, and architecting ELT pipelines across multiple business domains using Fivetran and Snowflake.
I hold certifications in SnowPro Advanced Data Engineer, dbt Developer, and Data Vault 2.0 — so I don't just build pipelines, I build them the right way.
If you need someone who can hit the ground running, communicate clearly with both technical and non-technical stakeholders, and deliver production-quality work — let's talk.
Data Analysis
Python
Data Engineering
PySpark
DevOps
Data Visualization
MongoDB
Microsoft Azure
Database
Snowflake
dbt
ETL
SQL
Git
Data Modeling
Data Warehousing & ETL Software
Fivetran
Data Integration
Solution Architecture
Marco R.
Lisbon, Portugal
$45/hr
4.9
68 jobs
🏆 Top 3% Freelancer on Upwork | 100% Success Rate | AIㆍData ScienceㆍAutomation
I help clients build AI agents up to 90% faster by tweaking open-source agent harnesses 🔧
I’m a Data Scientist and AI Engineer with over 5 years of hands-on experience building AI systems, automation workflows, and data-driven applications for clients across multiple industries.
Lately, I became a specialist in the Hermes Agent, helping founders and companies deploy this open-source agent harness across a wide range of industries, environments, and use cases.
🌍 I speak: English, French, Spanish, and Portuguese.
🤖 I use: Cursor, Claude, Hermes Agent.
⭐ Highlights
↳ Trained 5+ founders on how to use the Hermes Agent to optimize their workload.
↳ Configured and deployed Hermes Agent workflows for multiple companies, following security and scalability best practices.
↳ Developed 5+ MVPs that successfully secured funding.
↳ Built and currently maintain scalable data pipelines for 3+ companies.
↳ Built production-ready Retrieval-Augmented Generation (RAG) systems using modern LLM frameworks and vector databases.
↳ Built custom AI-driven automation systems for content creation, including avatar videos, images, and social media workflows.
↳ Built AI agents that run on Slack, Telegram, Discord, and other gateways, including vibe-coded chat interfaces.
↳ Built tailored agent skills and workflows for clients across multiple industries, using prompt engineering best practices.
🧠 Skills & Tools
↳ AI & RAG Systems: LangGraph, LangChain, OpenAI, ChromaDB, Pinecone.
↳ Hermes Agent: setup, debugging, create custom AI Workflows, Skill integration, Gbrain, MCPs, security best practices.
↳ Automation & Scraping: Playwright, BeautifulSoup, Apify (Actors), Camoufox.
↳ Data Science & ML: Pandas, NumPy, Scikit-Learn, PyCaret, TensorFlow, MMM (Marketing Mix Model), NLP, Optuna.
↳ Dashboards & Visualization: Plotly Dash and Data Studio.
↳ Web Development: FastAPI, Flask, CSS, HTML, Jinja2, Vibe-coding.
If you need an AI agent that actually works, an automation that doesn't constantly break, or a reliable data platform, send me a message, and we'll help you design the right solution.
Data Science
Natural Language Processing
Data Visualization
Retrieval Augmented Generation
Analytics Dashboard
AI Agent Development
Plotly
Automation
AI Chatbot
LLM Prompt Engineering
Automated Workflow
API Integration
AI Video Generation
OpenAI API
Gemini
Diogo A.
Setubal, Portugal
$15/hr
5.0
1 jobs
Hi, I’m a Data Analyst & Junior Data Scientist with a strong background in Data Science and Artificial Intelligence.
I enjoy working with data to solve real problems - from cleaning messy datasets to building clear analyses and predictive models that help decision-making.
I mainly work with:
- Data Cleaning & Preprocessing
- Exploratory Data Analysis (EDA)
- Data Visualization & Insights
- Machine Learning & Predictive Modeling
- Dataset preparation for AI/ML projects
I hold a Bachelor’s degree in Data Science and I am currently completing a Master’s in Artificial Intelligence, where I work with real-world datasets and industry-style projects (including CRISP-DM workflows).
I focus on writing clean Python code, structured analysis, and making data understandable — not just for technical teams, but also for business decisions.
Tools I use regularly:
Python (pandas, numpy, scikit-learn), SQL, and data visualization libraries.
If you need someone reliable to clean, analyze, or help make sense of your data, feel free to reach out.
Data Analysis
Machine Learning
Python
Data Extraction
pandas
Data Cleaning
SQL
Adriany F.
Porto, Portugal
$15/hr
5.0
1 jobs
I'm a Data Analyst with a background in Industrial Engineering. I
specialize in process optimization, data visualization, and leveraging
data to address business challenges and enhance organizational
efficiency.
I've worked on automating data acquisition, analyzing market trends,
and designing performance dashboards. My skills include Python,
SQL, VBA, Power BI, and MS Excel.
My focus is on applying analytical skills to drive efficiency and
effectiveness. As a Master's in Data Science student, my
goal is to help organizations make better decisions by uncovering
insights in their data.
Data Analytics & Visualization Software
Data Analysis
Data Mining
Python
Microsoft Power BI
SQL
Microsoft Excel
Web Scraping
pandas
NumPy
Pedro S.
Lisbon, Portugal
$120/hr
5.0
10 jobs
Expert-Vetted on Upwork (Top 1%).
Fractional CTO and AI engineer. 15+ years building search systems, ML platforms, credit engines, and recommendation systems across biotech, fintech, and martech.
The implementation layer is getting cheaper every quarter. Judgment about what to build, when, and with what tradeoffs has gotten more valuable. That's where most of my time goes now.
𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼
• Help you decide what's worth building
• Help you scope it without painting yourself into a corner
• Take the technical side off your plate for a while
𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸
• I'll tell you not to build it if it's not worth building
• I push back, and I expect you to push back on me
• I take responsibility, and I expect the authority that goes with it
𝗦𝗲𝗹𝗲𝗰𝘁𝗲𝗱 𝘄𝗼𝗿𝗸
• Medical-legal document extraction. Owned architecture, build, and the calls about what to automate vs leave to humans. Weeks of analyst review compressed to minutes. The interesting problems weren't the AI ones.
• Scientific AI platform for biotech R&D. Took a working PoC to a system the team actually relies on. Parser reliability, confidence calibration, CI/CD benchmarking.
• AI-assisted event marketplace. Backend architecture, payments, AI planning assistant.
• Domain-adapted speech recognition for spacecraft operations. Real-time voice-loop capture, indexed searchable transcripts, deployed across multiple missions.
• Personalized footwear production pipeline. Parametric CAD + automated manufacturing instructions. 2 days → 30 minutes per pair. Made the unit economics work.
𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁𝘀
• Initial Fit Call — free. 30-min call + follow-up memo with 2–3 ranked next steps.
• AI Product Audit & Roadmap — from $7k, ~2 weeks. Pressure-test scope, architecture, stack, failure modes, team shape.
• Fractional CTO — custom, usually 10–20 hrs/week for 3–6 months. I own architecture, technical direction, and execution quality.
Stack often includes: Python/FastAPI, TypeScript/React/Next, Postgres, GCP/AWS, OpenAI/Anthropic, RAG, vector search.
Data Science
Algorithm Development
Data Mining
Machine Learning
Natural Language Processing
Python
Neural Network
Full-Stack Development
Web Service
Artificial Intelligence
Generative AI
Large Language Model
Recommendation System
Search Engine
Data Extraction
Ahmed A.
Lisbon, Portugal
$15/hr
5.0
7 jobs
Are you ready to redefine what's possible for your business? I'm an AI Automation Engineer specializing in building intelligent, high-impact workflows that drive tangible results. Leveraging n8n, cutting-edge AI agents, and custom code, I transform complex business challenges into seamless, automated solutions, unlocking unprecedented growth and efficiency.
About Me:
I am currently a Master’s student at NOVA IMS, specializing in Data-Driven Marketing. My academic rigor keeps me at the forefront of the latest trends in analytics, automation, and AI. This allows me to deliver precision-engineered solutions that aren't just innovative, but are meticulously designed for maximum ROI and measurable business impact.
My foundation is built on a Bachelor's degree in Computer Science, providing a robust understanding of algorithms, data structures, and software engineering principles. Coupled with my prior experience as a Data Scientist, I possess a deep expertise in data analysis, predictive modeling, and extracting actionable insights from complex datasets. This unique blend of skills ensures that every automation I build is not only technically sound but also strategically aligned with your business goals, leveraging data to its fullest potential.
What I Deliver: Next-Level Automation for Niche Workflows
My expertise lies in crafting robust, scalable automations that propel businesses forward. Here's how I can empower your operations:
Intelligent Lead Generation Automation: Design and deploy end-to-end systems that automatically identify, qualify, and nurture leads, ensuring a continuous flow of high-potential prospects into your sales pipeline.
Hyper-Targeted Advertising Automation (Facebook & Google Ads): Automate campaign creation, optimization, and reporting. Crucially, I build seamless workflows to extract leads from your CRM (e.g., HubSpot, Salesforce) and synchronize them directly into Facebook and Google Custom Audiences, enabling unparalleled precision in targeting and retargeting that significantly boosts ad performance and reduces wasted spend.
Social Media Automation & Engagement: Implement systems for automated content scheduling, posting, and engagement monitoring across platforms, enhancing your brand presence and freeing up valuable marketing time.
AI-Powered Video Automation: Utilize advanced AI agents to automate aspects of video content creation, from script generation to initial editing, drastically reducing production time and cost.
AI Agent Orchestration: Design and deploy autonomous AI agents for data analysis, content creation, customer support, and more, leveraging leading LLMs like OpenAI (ChatGPT, GPT-4) and Deepseek, as well as other highly demanded systems like Google's Gemini and Anthropic's Claude for diverse and powerful capabilities.
n8n Workflow Development (Complex Integrations): Build robust, maintainable automations that connect your favorite tools and platforms, streamlining operations and reducing manual work, ensuring your business runs like a well-oiled machine.
Custom Python & JavaScript Solutions: Extend n8n’s capabilities with advanced scripts for complex data processing, bespoke API integrations, and business logic tailored precisely to your unique needs.
Popular Integrations: Expertise in connecting n8n with Google Workspace (Sheets, Gmail, Drive), Slack, Microsoft Teams, Notion, Trello, Asana, Jira, HubSpot, Salesforce, Mailchimp, Shopify, WooCommerce, Stripe, Google Analytics, Airtable, PostgreSQL, MySQL, REST APIs, GitHub, and many more.
Why Partner With Me:
As an AI Automation Engineer with a sales-driven mindset, I focus on solutions that convert. My approach is rooted in:
Unmatched Technical Mastery & Coding Acumen: My Computer Science background and experience as a Data Scientist provide a profound understanding of technical architecture, robust coding practices, and advanced data manipulation, ensuring truly custom, high-performance automation.
Strategic, Data-Driven Solutions: My Master’s studies at NOVA IMS provide a foundation in cutting-edge marketing analytics, ensuring every automation is optimized for measurable results and increased ROI. I don't just automate; I strategize for conversions.
Niche Workflow Specialization: Deep expertise in complex marketing and sales automation challenges means I understand your specific pain points and can deliver solutions that directly address them for maximum impact.
Client-Focused & Results-Oriented: Every solution is meticulously tailored to your unique business goals, prioritizing efficiency, scalability, and, most importantly, measurable impact on your bottom line.
Transparent & Collaborative: Expect clear communication, proactive problem-solving, and a partnership approach that ensures your vision is brought to life effectively.
Let's build intelligent automations that save you time, eliminate errors, and consistently drive more conversions, revenue, and growth for your business in a data-driven world
Machine Learning
Natural Language Processing
Python
Microsoft Excel
SQL
AI Agent Development
JavaScript
Data Analytics
Data Cleaning
Google Analytics 4
Google AdSense
n8n
HubSpot
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