Charl'🥋

Backend Developer
AI Automation

Culè..
FC Barcelona

[Blaze Binges @BlazeBinges]

"Save Me" is the greatest television theme song of all time.

[Nikita Rai @Nikita26rai]

The mistake is thinking they're interchangeable.

The better mental model is:

What am I filtering? -> At what stage?

Once you understand that, these clauses become much easier to reason about.

Which one confused you first HAVING or QUALIFY? 👇

#SQL #DataEngineering #SQLTips #Database

[MessiXtra @MessiXtraHQ]

🚨 France Football explains the reason for the presence of each candidate.

Here’s what they highlighted about Leo Messi:

"Why is Messi nominated? At 39, Lionel Messi returned to the shortlist after two years away because he again carried Argentina to a World Cup final and proved that his game still leads both scoring and creation. The official Ballon d’Or site framed it as the secret of his longevity. It added: His legacy as a genius was secured from a relatively young age. Messi is universally considered the prototype of the modern 'number 10' and the false '9' . He is a player capable of simultaneously leading the world's elite in playmaking and goal scoring. The other is his ball control in tight spaces: He achieved the highest historical rating for ball retention under pressure. His low center of gravity and frequent touches with his left foot allow him statistically unprecedented ball control,"

🚨 Messi’s stats during the award period:

⚔️ 48 matches
⚽ 45 goals
🅰️ 30 assists
🅿️ 75 G/A
🥇 30 MOTM
🧠 46 big chances created
🔑 148 key passes
💨 116 successful dribbles
👟 244 shots (106 on target!)
💪 234 duels won
🏆 MLS Cup Champions
🏆 MLS Eastern Conference Champions
🥇 MLS Season MVP
🥇 MLS Season Golden Boot
🥇 MLS cup playoffs MVP
🥈 2025 Leagues Cup runner up

🚨 2026 World Cup stats:

🥈 World Cup runner up
🥈 2nd Most goals (8)
🥈 2nd most assists (4)
🥈 2nd Most G/A (12)
🥇 Most Big chances created (8)
🥇 Most successful dribbles (25)
🥇 Most Chances Created (25)
🥇 Most Accurate crosses (19)
🥈 2nd most duels won (52)
🥇 Most shots taken (35)
🥈 2nd most shots on target (18)

⭐ 17 Ballon d’Or nominations.

2006 ➡️ 2026

20 YEARS. 🐐

[Dhanian 🗯️ @e_opore]

SYSTEM DESIGN ROADMAP
│
▼
1. FUNDAMENTALS
│
┌─────────────────┼─────────────────┐
▼ ▼ ▼
Scalability Reliability Availability
│ │ │
└─────────────────┼─────────────────┘
▼
2. NETWORKING
│
HTTP → TCP/IP → DNS → TLS
│
▼
3. SYSTEM COMPONENTS
│
┌──────────────┬───────┼────────┬──────────────┐
▼ ▼ ▼ ▼ ▼
Servers Proxies APIs Load Balancers CDNs
│ │ │ │ │
└──────────────┴───────┼───���────┴──────────────┘
▼
4. DATABASES
│
SQL → NoSQL → Indexing → Transactions
│
▼
Replication → Partitioning → Sharding
│
▼
5. CACHING
│
Cache-Aside → Redis → CDN Cache
│
▼
6. DISTRIBUTED SYSTEMS
│
┌──────────────┬───────────┼──────────────┬──────────────┐
▼ ▼ ▼ ▼ ▼
CAP Theorem Consistency Consensus Distributed Consistent
Models Locks Hashing
│ │ │ │ │
└──────────────┴───────────┼──────────────┴──────────────┘
▼
7. ASYNCHRONOUS SYSTEMS
│
Message Queues → Kafka → RabbitMQ → Pub/Sub
│
▼
8. MICROSERVICES
│
API Gateway → Service Discovery → Service Communication
│
▼
Saga → Outbox → Event-Driven Architecture
│
▼
9. RELIABILITY
│
Timeouts → Retries → Circuit Breakers → Rate Limiting
│
▼
10. OBSERVABILITY
│
Logs → Metrics → Tracing → Alerting
│
▼
11. SECURITY
│
Authentication → Authorization → Encryption → IAM
│
▼
12. CLOUD ARCHITECTURE
│
AWS → Azure → GCP → Containers → Kubernetes
│
▼
13. SYSTEM DESIGN PATTERNS
│
┌──────────────┬───────────┼──────────────┬──────────────┐
▼ ▼ ▼ ▼ ▼
CQRS Event Leader Failover Load
Sourcing Election Balancing
│ │ │ │ │
└──────────────┴───────────┼──────────────┴──────────────┘
▼
14. REAL-WORLD SYSTEMS
│
┌─────────────────────────┼─────────────────────────┐
▼ ▼ ▼
URL Shortener Chat System File Storage
│ │ │
▼ ▼ ▼
Notification System Social Feed Video Streaming
│ │ │
▼ ▼ ▼
Payment System Search Engine Ride Sharing
│
▼
15. DESIGN INTERVIEWS
│
Requirements → Estimation → Architecture
│
▼
API → Database → Scaling → Caching
│
▼
Bottlenecks → Trade-offs → Failure Handling
│
▼
SYSTEM DESIGN EXPERT

[FIFA World Cup @FIFAWorldCup]

It’s now been eight years since Lionel Scaloni became the head coach of Argentina 🇦🇷⭐️

#FIFAWorldCup

[kritika @vibeonX69]

Backend Engineering Concepts Ranked by Difficulty

🟢 HTTP — Easy
🟢 CRUD APIs — Easy
🟢 Authentication — Easy
🟢 SQL Queries — Easy

🔵 Caching — Moderate
🔵 Message Queues — Moderate
🔵 Database Indexing — Moderate
🔵 Rate Limiting — Moderate

🟠 Load Balancing — Hard
🟠 Distributed Systems — Hard
🟠 Event Streaming — Hard
🟠 Database Sharding — Hard

🔴 Distributed Consensus — Very Hard
🔴 Data Replication — Very Hard
🔴 Global Consistency — Very Hard
🔴 Multi-Region Failover — Very Hard

Which one belongs you in?

[Ray 👨🏽‍💻 website & app developer @Raynerdtech]

Before shipping authentication:

☐ Rate-limit login
☐ Hash passwords properly
☐ Expire reset links
☐ Make OTPs single-use
☐ Revoke sessions
☐ Protect every sensitive endpoint server-side
☐ Stop account enumeration
☐ Log suspicious attempts

Save for your next build!

[String @Stringcodes]

Learn REDIS like you'll never forget.
-Thread-

[FastAPI @FastAPI]

Pydantic is the data building block of FastAPI. 🏯

In these past years, it became the data building block of AI... and virtually all Python data validation. 🐍

Come and learn directly from @samuelcolvin, the author of @pydantic, how he uses AI to code.

https://t.co/8rPT3CouAP

[Borussia Dortmund @BlackYellow]

His reign of terror is finally over. 😭

In all seriousness, congratulations on a fantastic international career with Argentina, Leo. 🤝

[ΙϹΗΙΞ🫆 @Ark_Jesuit]

Building Fitness Space has changed me beyond the code.

It has taught me patience, leadership, resilience, product thinking—and most importantly, how to build for people, not just users.

I’ve grown a lot through this journey, both professionally and personally.

This THISDAY feature tells a little more of the story. 👇

Read the story

https://t.co/PN1wUzHBnG

[Troll Football @TrollFootball]

If footballers were characters of Harry Potter

[Fabrizio Romano @FabrizioRomano]

Lionel Messi’s letter for his father. ❤️‍🩹

Dad, I still can’t believe that you’ve gone. I don’t fall, or rather, I don’t want to fall. It’s very hard for me to imagine that I’m not going to see you anymore, that we’re not going to talk anymore. I know you were suffering and that it’s for the best, but you left too soon. We still had a lot left to enjoy together.

You asked me so much to play in the last World Cup, and it was in the days just before it started that you got the worst. It was the first time you weren’t going to be at a tournament, but Mom told me that you were going to get better and that you’d be well enough to travel. I told you we were going to reach the final so you could travel.

Every time a match ended I waited for and missed your message. That’s when I realized the situation was really bad. Even so, I didn’t stop thinking about going as far as possible, to buy you time and so you could see a match. We reached the final and you couldn’t be there.

I wanted to win it to bring it to you and show you a new one. I couldn’t; my legs wouldn’t give any more. This time I tried to go against my body, but I couldn’t. I never managed to feel good.

When I arrived you thought we had lost the final on penalties. We couldn’t talk about any of everything that happened. You couldn’t enjoy anything.

We weren’t champions, but you have no idea how much we enjoyed every single match. Once again, you were right: I had to be there and play it.

I’m telling you this because it was the only thing we couldn’t talk about, since you already know everything else. We talked every day and saw each other whenever we could, given my commitments.​​​​​​​​​​​​​​​​​​���​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

I don’t know what I’m going to do without you, I don’t know how to go on. I only played football and now I have quite a few doubts about whether I’ll keep doing it for much longer.

You were by my side from the beginning; there was so little left until the end. Why couldn’t you hold on that little bit more so we could finish together?

I know your happiness was seeing your family well, your wife, your children, and above all, without the others finding out, watching me play…

It was always like that since I was little. You would take me to all the training sessions as soon as you got home from work. For many of them Mum took me because you were working.

Obviously you never missed a single match. How you suffered watching me and how you enjoyed it, even though you never gave me many compliments.

You were dad, friend and representative.

You were always the person you needed to be in every moment and you never got anything wrong. Beyond a few reproaches or arguments, you were always right. In the end it always turned out the way you said.

I’m going to miss you a lot, but you’ll always be present, and especially in the upbringing of my children, because I teach them and raise them the way you both did with me.

Rest in peace and look after us from above the way you did down here. Thank you for everything.

I love you, Dad. ❤️

[Krishna Agrawal @Krishnasagrawal]

Instead of watching an hour of Netflix, watch this 2-hour Stanford lecture, which will teach you more about how LLMs like ChatGPT and Claude are built than most people working at top AI companies learn in their entire careers.

[FC Barcelona @FCBarcelona]

La Masia is where dreams begin. ✨

[Charl'🥋 @Kray_karl]

@queen_xtar I have no clue what that means.... but please press his neck well for me 😅😅

[ESPN FC @ESPNFC]

Smile Leo, you are going to the World Cup final ... again 🐐

[Nigeria Stories @NigeriaStories]

The Delta State Police Command has arrested Ifeanyi Ogbonna, male, aged 40, also popularly known as "Odogwu of Asaba," in connection with the alleged rape of a 20-year-old woman, who later died. The arrest followed a petition received by the Command alleging that on 1 June 2026, the deceased travelled to Asaba at the invitation of the suspect, who had offered to train her in content creation, a programme he reportedly promoted through his social media platform.

"Upon her arrival in Asaba, the suspect allegedly took her to a hotel, where he allegedly r@ped her and subjected her to physical violence. She later returned home visibly distressed and disclosed the incident to her parents. In the aftermath of the alleged assault, the deceased made a video recording in which she recounted her experience and the emotional distress she suffered following the incident. She subsequently commited su!cide by ingesting a toxic substance and later d! ed despite efforts to save her life" Edafe Bright, spokesperson of the command said

[Charl'🥋 @Kray_karl]

@yung_pheelz01 You're hilarious 😂

[Big Pheelz @yung_pheelz01]

E no go better for you if you comot that France flag