
Eloi Ugo Pattaro
Verified Expert in Engineering
Data Scientist and Developer
Eloi Pattaro is a full-stack staff data scientist, well-versed in Python, SQL, PySpark, and cloud technologies (AWS, GCP, and Azure). Eloi's expertise includes data architecture, data mining, data visualization, and process automation. He has a strong background in leading data science teams and interfacing with marketing and product teams to improve efficiency. He is fluent in English and Portuguese and looks forward to adding value to your project.
Portfolio
Experience
Availability
Preferred Environment
Amazon Web Services (AWS), Git, Artificial Intelligence (AI), Crypto, Data Analysis, Data Engineering, Data Science, Data Visualization, ETL, Machine Learning
The most amazing...
...achievement I've had is updating a fraud prevention system, reducing the fraud rate from 3.5% to less than 0.3% and saving the company over $5 million a month.
Work Experience
Global Fraud Strategy Data Manager
Klarna
- Identified a flaw with the company's authentication system and proposed a new algorithm that doubled the acceptance and conversion rates.
- Detected and fixed key data integrity issues impacting models, analysis, and indicators.
- Mentored and trained data scientists and analysts.
Decision Sciences Chapter Lead and Senior Manager
iFood
- Led the anti-fraud department's data team during a chargeback crisis and reduced the chargeback by 90%, from over 3% to less than 30 basis points.
- Proposed and assembled three new horizontal structures within the data domain, changing the structure from a single back office unit to squads across domains, which impacted over 80 employees.
- Designed a new automated evaluation process based on graphs and reduced the performance evaluation time from two weeks to two days.
- Made an FP&A cohort model, which resulted in the company changing how it spent a monthly $10 million marketing budget.
Data Specialist
Foxbit
- Recovered crucial customer data lost during a third-party platform provider (a white label solution) crash. This drastically mitigated any effects the crash may have caused on the company's customer base.
- Detected a product flaw that allowed the customer to exploit its credit system. Over 100k USD and 30 BTC were recovered from customers abusing that product flaw.
- Automated the financial reconciliation process the company had.
Lead Data Scientist
Mira Educacao
- Hired and structured a small team consisting of four data scientists and engineers.
- Oversaw data engineering and data analytics projects and processes.
- Built an Optical Mark Reader for the mobile app, which could scan and correct test sheets.
Business Analyst
Nubank
- Detected an issue in the company's underwriting model in which it misrepresented the operational cost of customers. As a result, the company was onboarding unprofitable customers, severely impacting its P&L.
- Defined main KPIs for the new customer credit policies and built the monitoring tools and processes.
- Perceived an issue with how the company grew its operational team and offered an alternative that reduced the customer experience cost by 60%.
Experience
iFood – Performance Evaluation Graph System
iFood – Anti-fraud Decision Engine Refactoring
Skills
Languages
Python 3, Python, SQL
Libraries/APIs
Scikit-learn, Pandas
Tools
Spreadsheets, Git, Slack
Paradigms
Data Science, Management, ETL
Platforms
Amazon Web Services (AWS), Linux, Databricks, Azure
Other
Scientific Data Analysis, Science, Coding, Data Visualization, Machine Learning, Data Analysis, Project Design, Fraud Prevention, Technical Hiring, Hiring, Time Series Analysis, A/B Testing, Data Analytics, Data Modeling, Artificial Intelligence (AI), Time Series, Data Mining, Cloud, Data Engineering, Statistical Modeling, Data, Analytics, Quantitative Finance, Quantitative Risk Analysis, Data Cleaning, Unstructured Data Analysis, Large Data Sets, Data Scientist, Data Gathering, Web Scraping, Data Scraping, Recommendation Systems, Physics, Natural Language Processing (NLP), Computer Vision, Logistics, Growth, Financial Planning & Analysis (FP&A), Graphs, Crypto, Machine Vision, GPT, Generative Pre-trained Transformers (GPT)
Storage
MongoDB, PostgreSQL
Education
Bachelor's Degree in Physics
Universidade de Sao Paulo - Sao Paulo, Brazil