I have been in backend development for more than 15 years. It is a challenging field and It took me some time to find my path to becoming a good one. But if I started over, these are the 6 steps I would follow. 1 of 6.

Retries Have an Evil Twin: Duplicates. Retries are supposed to make systems reliable. But they can also break everything; silently. And if you’re not careful… your system pays the price. - A user gets charged twice.- An order is processed again.- The same message keeps

RT @RaulJuncoV: Your coding skills won't save you in a system design interview. Your architecture intuition will. And intuition? You buil….

Your coding skills won't save you in a system design interview. Your architecture intuition will. And intuition? You build them by solving real problems every single day. That’s why I’m building Join Enginuity:. → One system design challenge, daily.→ Streaks, badges,

RT @RaulJuncoV: Speed is easy. Context is everything. Senior devs know this. If you're not spending more time planning than writing code,….

Speed is easy. Context is everything. Senior devs know this. If you're not spending more time planning than writing code, you're doing it wrong. Building features isn’t about typing fast. It’s about knowing what not to touch. Understanding the architecture. Mapping the

RT @RaulJuncoV: 80% or more of your context lives in your database. MongoDB just turned into a first-class context provider. With the new….

BTW, here is the repo for the MCP server 👇.

80% or more of your context lives in your database. MongoDB just turned into a first-class context provider. With the new MCP Server, tools like Copilot, Claude, Windsurf, and VS Code can actually understand your data. Until now, LLMs powering Copilot, Claude, or Cursor wrote

RT @RaulJuncoV: “AI is coming for low-code platforms.”. I’ve heard that line more than once, and every time, I laugh. Because the people s….

“AI is coming for low-code platforms.”. I’ve heard that line more than once, and every time, I laugh. Because the people saying it are missing the bigger picture. Low-code platforms aren’t behind. They’re way ahead. They already have:. - Thousands of prebuilt components.-

RT @RaulJuncoV: Your system isn’t slow because of your code. It’s slow because of your choices. Here’s what actually kills software:. - Yo….

BTW, I share more real-world dev lessons like this in my newsletter:. And I post a daily question here:. To help you make better decisions, one insight at a time.

Your system isn’t slow because of your code. It’s slow because of your choices. Here’s what actually kills software:. - You chased microservices before understanding the domain. - You made everything async, then couldn’t trace a single bug. - You “overengineered” thinking you

RT @RaulJuncoV: Observability often dies on bloated dashboards. A friend called me last week. He was trying to figure out why a new featur….

Observability often dies on bloated dashboards. A friend called me last week. He was trying to figure out why a new feature was running slow. Half a day gone. Thousands of log lines later, he had a guess. Not an answer. That’s the reality for most teams today:. 1. You log

RT @RaulJuncoV: Meeting-Driven Development is real. And it’s killing your progress. We’ve normalized a workflow where talking about work h….

I’ve seen firsthand how too many meetings kill focus and slow down real progress. That’s why I write about practical cases to build better systems in my newsletter. And build a platform to practice System Design, one question a day.

Meeting-Driven Development is real. And it’s killing your progress. We’ve normalized a workflow where talking about work has replaced actually doing the work. - 30 minutes of standup.- 1 hour of grooming.- 1 hour of retro.- 1 hour of “alignment”.- 45 minutes for “sync”. And

RT @RaulJuncoV: Caching is easy to add. Hard to get right. Here are 7 caching concepts that separate a good system from a fragile one:. 1.….

Two ways you can get better at Systems Design 👇 . Newsletter: Join the community: