AI Agents Course
by Hugging Face 🤗


This free course will take you on a journey, from beginner to expert, in understanding, using and building AI agents.

https://huggingface.co/learn/agents-course/unit0/introduction

🚀 Let's Learn SQL Together!

Starting tomorrow, we’re kicking off a brand-new SQL/MySQL learning series! 🎉

📅 Every Monday we’ll share a new lesson, guiding you step by step—from the fundamentals to more advanced concepts. But first, tomorrow, we’ll drop a roadmap so you know exactly what to expect!

I feel like we’ve all been a bit passive here, and this is our chance to do something proactive—to learn, grow, and build real skills together.

Your participation is key! If this goes well, we’ll expand into other topics and keep adding valuable content for you.

🔥 Who's in? Drop a 🔥 if you're excited! 🔥

Much love from @bigdataspecialist

#SQL #MySQL #LearnTogether #NewSeries

Java 24 Launch (Live from JavaOne 2025)

Today is Java 24 release.
Stream has just started, but I feel like quality can be a little bit better honestly.

You can watch it live here:
https://www.youtube.com/watch?v=mk_2MIWxLI0

~~~ TODAY'S PROGRAM SCHEDULE ~~~

15:00 UTC: Java 24 Overview with Mikael Vidstedt
15:30 UTC: JavaOne Opening Keynote "Our World, Moved by Java"
-- Cutting Edge Demos
-- Garbage Collection Performance Insights
-- News About Java in Education
-- ...and more
17:15 UTC: Java 24 Deep Dive
-- AOT Caching with Dan Heidinga
-- Stream Gatherers with Viktor Klang

🚨 Attention: A Critical Next.js vulnerability

What Happened?

A massive vulnerability (CVE-2025-29927) was just found in Next.js, a popular framework for building web apps with React. This flaw, rated 9.1/10 for severity, lets attackers slip past security checks using a simple trick—a special header. It affects self-hosted Next.js apps (versions 11.1.4 to 15.2.2) that use middleware to protect pages, like admin dashboards. If unpatched, hackers could access restricted areas—yikes!

How Big Is It?

Pretty darn big! Millions of developers use Next.js, and this bug leaves tons of apps exposed. The good news? It’s fixed in version 15.2.3 and up. Please update to newest version to stay safe!

I just shared this in our @web_dev_bds channel.

If your project are using next.js make sure to upgrade to newest version to avoid security risk

More info: https://thehackernews.com/2025/03/critical-nextjs-vulnerability-allows.html

Here are some additional info about previous SQL database types lesson

🚨 Google just dropped a 68-page whitepaper on Prompt Engineering — perfect for API users!

It’s packed with advanced tips, techniques, and real examples.
Super useful if you're working with LLM APIs or building AI apps!

PDF below 👇

🌸🐣 Happy Easter from the World of Code & Data! 🐰💻

May your day be filled with joy, colorful moments, and beautifully structured queries.
Wishing you and your loved ones a warm, happy, and meaningful Easter!

Your @bigdataspecialist

How discord stores trillions of messages 🧠

An interesting video about one of the biggest challenges in tech world.

This video breaks it down - from the databases they use, to the smart engineering choices that keep everything running smoothly at scale.

No fluff, just a super interesting look at how one of the biggest chat platforms actually works behind the scenes.

Duration ⏰: 1 hour 8 minutes

If you're into system design, scalability, or backend engineering, this one’s a must-watch.

Link

Sorry for not posting for a long time.
I am getting ready for my wedding which will happen in 10 days!🤵👰

Also I will be attending Data Science/AI conference in Malaga (Spain) this week: https://jonthebeach.com/

If you are going to be there please come to say hello 😊

I just got married guys! 😍

This is me and my wife at sunset on our wedding day.

After conference in Spain i come back home and had most amazing wedding 💫

Thanks everyone for your patience. I will start posting regularly soon.

🎯 Master Big Data & Data Engineering — Ultimate Free Resource Pack 🚀

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🔹 🔥 Pro Tips for Aspiring Data Engineers

1. Learn SQL deeply – it's still the foundation of everything
2. Understand data formats: JSON, Parquet, Avro, ORC
3. Master Apache Spark — it's everywhere
4. Learn to use Airflow for orchestrating workflows
5. Practice writing ETL pipelines — build your own mini data warehouse
6. Get comfortable with cloud platforms (start with AWS/GCP free tiers)
7. Version-control your work using Git + DVC for data versioning
8. Learn Docker & Kubernetes basics — modern data infra depends on it
9. Explore real-time processing: Kafka, Flink, and Spark Streaming
10. Follow best practices for data modeling — star/snowflake schemas, SCDs, etc

---

🎓 Top Free Online Courses *(No login required or audit available)*

1. 📘 Big Data Specialization – Coursera
🕒 6 courses | 80+ hours
👨‍🏫 UC San Diego Professors
💡 Hadoop, Spark, Hive, NoSQL, real-world projects *(audit for free)*

2. 📊 Learn to Code for Data Analysis – OpenLearn (The Open University)
🕒 8 weeks
💡 Beginner-friendly programming and data analysis
📜 Certificate of participation (free)


3. 🧰 Data Engineering Zoomcamp – DataTalks.Club
🕒 10+ weeks
🎥 Full video lectures + GitHub labs
💡 Docker, Terraform, GCP, Airflow, Kafka, Spark, DBT

4. 🌀 Hadoop Tutorial for Beginners – Simplilearn (YouTube)
🕒 2.5 hours
👨‍🏫 Industry trainer
💡 Intro to HDFS, MapReduce, and the Hadoop ecosystem


5. 🚀 Google Cloud Data Engineering Quest – Cloud Skills Boost
🕒 ~40 hours
💡 Hands-on with BigQuery, Dataflow, Pub/Sub
🎯 Free credits available for real GCP practice

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📚 Bonus: Free Book

📘 The Data Engineering Cookbook – Andreas Kretz
💡 Open-source guide by a leading Data Engineering YouTuber

One of our subscribers wrote a comment asking for automation testing courses so here you go:

🎯 Ultimate Guide to Automation Testing — For Students & Beginners 🚀
*(All resources 100% FREE & No Signups Required!)*

👨‍💻 Thinking of diving into Automation Testing? Want to boost your QA skills and land a tech job fast? This guide has EVERYTHING you need: tools, tips, free courses, and materials.

---

🔥 What is Automation Testing?
Automation testing uses software tools to run tests on your code automatically — saving time, improving accuracy, and scaling your testing process.

You’ll commonly work with:
✅ Selenium
✅ Playwright
✅ Cypress
✅ JUnit/TestNG
✅ Postman (API Testing)
✅ Jenkins (CI/CD)
✅ Git & GitHub
✅ Python / Java / JS / C#

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🧠 Top FREE Courses (No Login Needed):

🎓 Selenium + Java Full Course:
YouTube (by Mukesh Otwani)
🔗 https://www.youtube.com/watch?v=FRn5J31eAMw

🎓 Playwright JS Testing (2024):
YouTube (by Naveen AutomationLabs)
🔗 https://www.youtube.com/watch?v=jkGAw3m6mAg

🎓 Postman for API Automation Testing:
YouTube (by Automation Step by Step)
🔗 https://www.youtube.com/watch?v=t5n07Ybz7yI

🎓 Cypress Crash Course (JavaScript):
YouTube (by LambdaTest)
🔗 https://www.youtube.com/watch?v=I8N7I0C7D2g

🎓 Jenkins CI/CD for Beginners:
YouTube (TechWorld with Nana)
🔗 https://www.youtube.com/watch?v=FxkSgkFv2TI

---

📚 Free Materials & Docs:

📘 Selenium Documentation:
🔗 https://www.selenium.dev/documentation/

📘 Cypress Docs (Modern Web Testing):
🔗 https://docs.cypress.io/

📘 Playwright Docs (Fast-growing alternative to Selenium):
🔗 https://playwright.dev/docs/intro

📘 Postman Learning Center:
🔗 https://learning.postman.com/

📘 GitHub Learning Lab:
🔗 https://lab.github.com/

---

💡 Top Tips & Tricks for Learners:
🧩 Start with Selenium + Java or Python – they’re industry standards.
🔁 Learn basic loops, conditionals & OOP in your chosen language.
⚙️ Practice writing test scripts for login/logout flows.
🧪 Use dummy sites like:
🔗 https://the-internet.herokuapp.com/
🔗 https://demoqa.com/](https://demoqa.com/
🗂 Use GitHub to track your code from Day 1.
🔧 Start learning CI/CD with Jenkins or GitHub Actions after mastering basics.


---

🎁 Bonus: Awesome Practice Projects
✅ Test a Login/Signup form
✅ Automate filling web forms
✅ Write data-driven tests (read data from CSV/Excel)
✅ Automate UI flows with Playwright or Cypress
✅ Automate REST API tests with Postman

---

💬 Final Words
Mastering automation testing doesn’t require a degree or \$\$\$. Be consistent, build projects, contribute to GitHub, and keep learning. These free resources are enough to get you job-ready! 💼

💻 *Start today. Build your first automated test. Make future you proud.* 🌱

#AutomationTesting #Selenium #QA

Interesting site with collection of all kind of programming related cheat sheets in one place:

https://overapi.com/