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Hi, I'm Matheus

Data Analyst | Business Analyst

Welcome to my portfolio. This page is designed to showcase my ability to solve business problems. Here, you will find various business cases.

You can also find information about my professional experience, skills, and the tools I use for work.

About me

My name is Matheus Cordeiro Salles. I have a degree in engineering and have been working with data since 2020. I'm currently a data analyst at Minnesota Mining and Manufacturing Company.

My current job involves using data to enhance planning team decision-making. I'm also actively studying data through courses and personal projects.

Experience


Minnesota Mining and Manufacturing Company - 3M

Data analyst

AUG 2025 - Present
  • Support planning team;

Serrana Distribuidora ltda / HEINEKEN

Data analyst

SET 2022 - AUG 2025 (3 years)
  • Maintenance and development of a Data Warehouse, data engineering;
  • Search for commercial opportunities, development of analysis and tools to control the main KPI's of profit and invoice;
  • Strategic Decision support
  • Development of operation/tactical reports for commercial;
  • Development of intern process and tools;
  • Investigation and emission of reports with sensitive information (commissioning and results);
  • Leading presentations.

Softys / Carta Fabril

Business Analyst

AUG 2020 - SEP 2022 (2 years)
  • Development of tools for analysis and management of consumption;
  • Development of indicators for industrial performance;
  • Management of departmental routines;
  • Analysis of raw material consumption and enforcement of targeted actions;
  • Creation of inventory and production controls;
  • Optimization of control and analysis tools.

Protetores do Saber

Teacher

SEP 2018 - JUN 2020 (2 years)
  • Private lessons for up to three students per class;
  • Students from elementary, middle, and high school as well as college;
  • Teaching of mathematics, statistics, physics, chemistry, calculus, static mechanics, and numerical methods.

Skills

Programming and Data Bases

  • Python for data analysis
  • SQL
  • Data Bases: SQLite, Postgres, MySQL and BigQuery

Statistics and Machine Learning

  • Descriptive statistics
  • Regression algorithms: Simple Linear, Multiple Linear, Decision Trees
  • Classification algorithms: KNN, Decision Trees

Data Visualization

  • Python libraries: Matplotlib and Seaborn
  • Business intelligence solutions: Power BI, Tableau, Looker, and QlikSense

Software Engineering

  • Building virtual environments: pyenv
  • Version control: Git
  • Project sharing: GitHub

Projects

CO2 Growth

Data visualization project using, presenting the increase in CO2 levels over time. The presentation can be used to study the development of industrialization and the technological level of countries.

Tools used:

  • Tableau Public

Find the best route

Genetic algorithm applied to a routing problem. The proposal is to use a computational method (heuristic) to find an acceptable solution in a short amount of time. Heuristic solutions are ideal for problems that do not allow much time for applying exact methods (time-consuming methods with the best result).

Tools used:

  • Python
  • Pandas
  • VScode/jupyterNotebook
  • Genetic Algorithm Methods

CURRY COMPANY

Project based on a Kaggle case. It is a Marketplace where the executive wants a tool to track metrics. The solution is the creation of a customized dashboard to meet this need.

Tools used:

  • Python
  • VScode/jupyterNotebook
  • Pandas
  • Plotly
  • Streamlit
  • Streamlit Cloud
  • GitHub

Synthetic data

This project creates synthetic commercial database using realistic business rules, chatGPT synthetic data and programming. The idea here is to show some ETL process to modeling data.

The output is a database with sales table and clients information, usefull to be used in future projects.

Tools used:

  • Python
  • ChatGPT
  • VScode/jupyterNotebook
  • Pandas
  • GitHub
  • SQLite

Contact

LinkedIn: matheus-cordeiro-salles-06613022

GitHub: MSalles94

e-mail: matheus.salles_1994@hotmail.com