Vinicius Fagundes

2 min read

Vinicius Fagundes

Jul 21

Your AI Bill Is a Routing Problem, Not a Model Problem

#ai #data #dataengineering #python

3 min read

Vinicius Fagundes

Jul 20

Cloud Bills Took a Decade to Get FinOps. AI Bills Won't Get That Long.

#ai #data #dataengineering #python

4 min read

Vinicius Fagundes

Jul 16

12 Patterns Run Every Data Stack. Seniority Is Knowing When Each One Is a Mistake.

#ai #data #dataengineering #python

9 min read

Vinicius Fagundes

Jul 6

You saved $80K self-hosting Spark. It cost you $400K.

#ai #python #data #dataengineering

6 min read

Vinicius Fagundes

Jun 30

Your warehouse isn't expensive. Your full table scans are.

#bigdata #bigquery #redshift #aws

5 min read

Vinicius Fagundes

Jun 29

Your p-value answered a question you didn't ask.

#datascience #julialang #statistics

5 min read

Vinicius Fagundes

Jun 25

Strong vs eventual consistency: you can't have it always-on and always-right. Pick one.

#data #mongodb #kafka #presto

5 min read

Vinicius Fagundes

Jun 24

Brute force isn't grit. It's the bill for a plan you skipped.

#ai #data #python #scala

4 min read

Vinicius Fagundes

Jun 23

Aws Glue or Airflow? You're probably paying for both to do one job

#ai #data #python

5 min read

Vinicius Fagundes

Jun 23

Your model isn't underfitting. Your features are lazy.

#data #ai #python

6 min read

Vinicius Fagundes

Jun 17

Your pipeline isn't slow. Your parser is.

#data #python #ai

8 min read

Vinicius Fagundes

Jun 16

SQL or Python? The line is sharper than you think (with code)

#python #scala #sql #data

9 min read

Vinicius Fagundes

May 15

Fraud Detection and Recommendation Are the Same Pipeline. Most Teams Build Two.

#architecture #dataengineering #machinelearning #systemdesign

3 min read

Vinicius Fagundes

May 14

Why Your Recommendation Engine Passes Every Test and Fails in Production

3 min read

Vinicius Fagundes

May 11

Building Your First Data Warehouse in Databricks — End to End 🎉

#databricks #ai #dataengineering #datascience

7 min read

Vinicius Fagundes

May 4

Medallion Architecture: Designing Bronze, Silver, and Gold Layers

#databricks #dataengineering #ai #datascience

6 min read

Vinicius Fagundes

Apr 26

Delta Lakes: ACID Transactions, Time Travel & Delta Tables

#dataengineering #databricks #ai #datascience

6 min read

Vinicius Fagundes

Apr 22

DataFrames & SQL in Databricks: Reading, Writing, and Transforming Data

#databricks #ai #database #dataengineering

6 min read

Vinicius Fagundes

Apr 20

Databricks File System (DBFS) + Connecting to Cloud Storage

#databricks #data #ai #database

5 min read

Vinicius Fagundes

Apr 13

Apache Spark in Plain English: The Engine Behind Databricks

#ai #dataengineering #spark

5 min read

Vinicius Fagundes

Apr 6

Clusters & Notebooks: Your Databricks Workspace Explained

#databricks #python #ai #sql

5 min read

Vinicius Fagundes

Apr 1

Setting Up Your Databricks Account (Free Trial + First Look at the UI)

#databricks #ai #dataengineering #python

4 min read

Vinicius Fagundes

Mar 23

How Databricks Fits in the Modern Data Stack

#database #databricks #dataengineering #ai

4 min read

Vinicius Fagundes

Mar 20

The problem Databricks was built to solve

#databricks #data #ai #dataengineering

3 min read

Vinicius Fagundes

Feb 11

Charting Your Path: Courses and Resources to Accelerate Your Journey

#ai #data #beginners #career

5 min read

Vinicius Fagundes

Feb 2

Building Your First Pipeline: From Concept to Execution

#dataengineering #python #career #beginners

8 min read

Vinicius Fagundes

Jan 31

The Math You Actually Need as a Data Engineer

#datascience #career #beginners #python

4

6 min read

Vinicius Fagundes

Jan 28

Tools of the Trade: What Powers Modern Data Engineering

#datascience #career #dataengineering #python

5

5 min read

Vinicius Fagundes

Jan 27

Anomaly Detection + LLM: Statistical Rigor Meets AI Insights

#ai #dataengineering #python #programming

6 min read

Vinicius Fagundes

Jan 23

Pipelines, ETL, and Warehouses: The DNA of Data Engineering

#dataengineering #datascience #beginners #career

5

4 min read

Vinicius Fagundes

Jan 19

Data Engineering Uncovered: What It Is and Why It Matters

#dataengineering #beginners #data #career

4

3 min read

Vinicius Fagundes

Jan 11

Real-Time is an SLA, Not an Architecture: When You Actually Need Kafka (And When You Don't)

#discuss #architecture #dataengineering #career

10 min read

Vinicius Fagundes

Jan 10

Snowflake Cortex: The AI Layer Your Data Team Actually Needs

#snowflake #database #ai #llm

8 min read

Vinicius Fagundes

Jan 9

Train Models. Ship Systems. Know the Difference.

#datascience #machinelearning

9 min read

Vinicius Fagundes

Jan 7

Anomaly Detection in Seasonal Data: Why Z-Score Still Wins (But You Need to Use It Right)

#algorithms #datascience #machinelearning #python

1

11 min read

Vinicius Fagundes

Dec 28 '25

Production AI: Monitoring, Cost Optimization, and Operations

#llm #dataengineering #mlops #machinelearning

9 min read

Vinicius Fagundes

Dec 21 '25

RAG Evaluation Metrics: Measuring What Actually Matters

#llm #rag #dataengineering #ai

10 min read

Vinicius Fagundes

Dec 16 '25

Human-in-the-Loop Systems: Building AI That Knows When to Ask for Help

#ai #rag #programming #data

17 min read

Vinicius Fagundes

Dec 14 '25

Multi-Step Reasoning and Agentic Workflows: Building AI That Plans and Executes

#ai #rag #programming #webdev

16 min read

Vinicius Fagundes

Dec 11 '25

Reranking and Two-Stage Retrieval: Precision When It Matters Most

#ai #llm #rag

2 min read

Vinicius Fagundes

Dec 11 '25

Dense vs Sparse Retrieval: Mastering FAISS, BM25, and Hybrid Search

#ai #llm #vectordatabase

15 min read

Vinicius Fagundes

Dec 8 '25

Chunking Strategies: The Art of Slicing Documents for Optimal RAG Performance

#ai #llm #data

10 min read

Vinicius Fagundes

Dec 7 '25

Retrieval-Augmented Generation: Connecting LLMs to Your Data

#ai #datascience #llm #rag

10 min read

Vinicius Fagundes

Dec 5 '25

Prompt Engineering Patterns: From Zero-Shot to Chain-of-Thought Reasoning

#ai #mcp #llm #dataengineering

14 min read

Vinicius Fagundes

Dec 4 '25

Function Calling and Tool Use: Turning LLMs into Action-Taking Agents

#ai #llm #mcp #dataengineering

18 min read

Vinicius Fagundes

Dec 2 '25

Positional Encodings and Context Window Engineering: Why Token Order Matters

#dataengineering #ai #software

12 min read

Vinicius Fagundes

Nov 24 '25

Embeddings and Vector Similarity: How Machines Understand Meaning

#ai #datascience #dataengineering #llm

19 min read

Vinicius Fagundes

Nov 21 '25

Transformers and Attention: How LLMs Actually Process Text

#ai #architecture #llm #deeplearning

19 min read

Vinicius Fagundes

Nov 17 '25

Temperature, Tokens, and Context Windows: The Three Pillars of LLM Control

#ai #dataengineering #data #product

6

13 min read

Vinicius Fagundes

Nov 6 '25

Building Custom MCP Servers with Python: A Data Engineer's Guide 🛠️

#dataengineering #software #python #ai

1

5 min read

Vinicius Fagundes

Oct 22 '25

🏗️ Vector Database Architecture: How to Structure Your Data for Production RAG Systems

#architecture #llm #ai #database

3 min read

Vinicius Fagundes

Oct 17 '25

🎓 Building a Smart LMS Assistant: RAG System with Pinecone for Multi-Source Learning Data

#vectordatabase #ai #dataengineering

3 min read

Vinicius Fagundes

Oct 6 '25

When to Choose Scala Over Python for Apache Spark: A Performance-Driven Analysis

#datascience #dataengineering #ai