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Mariana Gonçalves

@marianagonalves

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Junior Data Scientist skilled in Python, SQL, and Power BI.

Portugal

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What I'm looking for

I am looking for a role that fosters growth, innovation, and collaboration in data science.

I am a passionate Junior Data Scientist with a strong foundation in Python, SQL, and Power BI. My recent experience as an AI Research Intern at Infonet allowed me to develop and deploy TaxBot, an AI-powered assistant for EU tax queries. This role honed my skills in system design and prompt evaluation using advanced techniques such as LangChain and OpenAI models.

Prior to my internship, I managed a guest house for six years, where I was responsible for daily operations and ensuring exceptional service, which resulted in consistently positive reviews. Additionally, during my time as a Production Management Intern at Hospital de Braga, I implemented block scheduling optimization models that significantly increased operational efficiency. My academic journey includes an MBA in Data Science, where I graduated with distinction, focusing on machine learning and data analysis.

Experience

Work history, roles, and key accomplishments

AI Research Intern

Infonet

Jan 2025 - Dec 2025 (11 months)

Developed and deployed TaxBot, an AI-powered assistant for EU tax queries using Prompt Engineering techniques. Focused on system design and prompt evaluation with LangChain and OpenAI models.

Prompt Engineering Lang Chain System Design AI Development

Guest House Manager

Guest House

Jan 2018 - Dec 2024 (6 years 11 months)

Managed daily operations including reservations, guest reception, and coordination of cleaning and maintenance teams. Delivered high-quality service, reflected in consistently positive reviews on booking platforms.

Operations Management Customer Service Team Coordination Guest Service

Production Management Intern

Hospital de Braga

Jan 2018 - Dec 2018 (11 months)

Implemented block scheduling optimization models to increase the number of exams performed without increasing costs. Focused on Operational Research and strategic process management.

Operational Research Process Optimization Strategic Management Scheduling Data Analysis

Education

Degrees, certifications, and relevant coursework

Universidade Autónoma

MBA Data Science, Data Science

2024 - 2025

Grade: 20/20

Studied Python, Machine Learning, Power BI, and SQL. Graduated with distinction, achieving the highest possible grade (20/20). Completed a final project on the analysis of cyberattacks (2015-2024) and future trend prediction using classification algorithms.

Universidade do Minho

Master's in Systems Engineering, Systems Engineering

2016 - 2019

Activities and societies: Erasmus Programme at Technische Universiteit Eindhoven, Netherlands

Focused on Process Optimization, Forecasting Methods, and Operational Research. Completed an Erasmus Programme at Technische Universiteit Eindhoven, Netherlands.