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franciscomg3

Fran Minguez

@franciscomg3

Data Engineer: Python, SQL, AI

Spain
English, Spanish
About me
I'm a Data Engineer & Data Scientist specializing in Python, SQL, Machine Learning and AI. I help businesses clean and transform data, automate repetitive tasks, build reliable ETL pipelines and develop predictive models. My experience includes data engineering with Python and PySpark at Experian, and RAG/LLM evaluation at Multiverse Computing. I focus on clear requirements, maintainable code, data quality and reproducible results. Need help with data cleaning, automation, analytics or AI evaluation? Let's discuss your project.... Read more

Skills

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franciscomg3
Fran Minguez
Offline • 

See my services

Data Cleaning
I will clean, transform and validate your data using python
From$25 / projectMore details
Data ETLs
I will automate your data workflows and build python etl pipelines
From$95 / projectMore details

Work experience

Independent

Data Scientist & ML Engineer

Independent • Freelance

Jun 2026 - Present • 5 mos

Develop independent projects in data engineering, applied machine learning, analytics, and reliable generative AI. Build reproducible technical studies covering RAG retrieval evaluation, LLM model assessment, data quality, and automated validation. Publish selected methodologies, demonstrations, and technical findings to make capabilities and limitations transparent. Also develop a separate initiative exploring scoped data, AI, and process automation pilots for Spanish SMEs. Independent technical research and development; public demonstrations are not presented as client engagements.

Multiverse

Machine Learning Engineer

Multiverse • Full-time

Dec 2025 - Jun 2026 • 6 mos

Designed and evaluated RAG systems and LLM/VLM evaluation workflows, focusing on retrieval quality, context sufficiency, abstention criteria, and failure analysis. Worked on supervised fine-tuning, model compression, and post-compression performance recovery. Served as functional Product Owner for a technical workstream, coordinating priorities and acceptance criteria across engineering and product activities. Presented technical findings and progress to clients and stakeholders. All proprietary systems, client information, and internal evaluation artifacts remain confidential.

Experian

Data Scientist

Experian • Full-time

Aug 2024 - Dec 2025 • 1 yr 4 mos

Modernized analytical processes from SQL Server and SSIS to Python, PySpark, and Databricks, developing modular and reusable processing components. Implemented automated data-quality checks, statistical validation, reconciliation, and traceability to improve the reliability of analytical workflows. Developed segmentation and machine-learning workflows using supervised and unsupervised techniques, including PCA, K-Means, and DBSCAN. Contributed to geospatial analysis and parameter optimization using PyTorch. Combined data engineering, analytical modeling, and business-oriented data analysis in a professional environment.