Business, life

Charlie Munger’s Lessons on Human Judgment

Charlie Munger spent nearly a century studying how humans outsmart… themselves. The man treated bad decisions the way a forensic detective treats fingerprints. And the funny part? Most of the traps he identified hit smart people harder than everyone else. Intelligence doesn’t protect you—it just lets you come up with more elegant ways to be wrong.

Here’s the Munger playbook, rewritten in plain English and spiced with some real-world bruises. Ahh… it’s also much shorter then the original work. However, you do with to read the original as he is much better writer.

Let’s start with the elephant Munger kept in the room: brains aren’t the bottleneck—judgment is. You can have a rocket scientist mind and still steer straight into a mountain if you use it wrong.

1. Using One Mental Model Is Like Using One Dumbbell

When someone only uses the tools from their field, they distort reality to fit their toolbox.

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Protect Your Digital Life: 3 Key Security Habits

We imagine hackers as trench-coat wizards hammering keyboards while green code rains down the screen.
Reality is less Matrix and more lazy cat burglar.

They don’t “hack in.”

They log in, using the same password you used for LinkedIn in 2014 and also for your Gmail, bank, gym, YMCA portal, and that meditation app you opened (only) once.

Let’s fix that.
It’s not hard but it’s important.

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Business, life

Nine Mental Models to Stop You from Making Dumb Decisions

We all think we’re rational.

We’re not.

Most of the time, most of the people are just apes with phones making pattern-matching errors at scale. If you aren’t sure, just look around.

Shane Parrish’s The Great Mental Models, is a antidote — a toolkit for thinking clearly and making fewer stupid decisions. Hopefully.

Btw, I wrote about it in the past as I ‘took’ ideas from the great Charlie Munger:

Below are nine models I keep coming back to, rephrased for the real world (and with fewer academic eyebrows raised).

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10 Startup Lessons from David Deutsch’s The Beginning of Infinity

David Deutsch’s The Beginning of Infinity isn’t a business book. It’s a bold meditation on science, philosophy, and human progress. But buried in its pages are principles that can reshape how startup leaders think about building companies, products, and cultures.

Startups are problem-solving machines.
Problems never stop coming; solutions never stop creating new challenges. That cycle is the essence of growth. Deutsch gives us a framework for seeing this not as a burden, but as the path to infinity.

Here are ten core lessons from the book, translated into practical guidance for startup leadership, with examples of how a CTO might put them into action.

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Business, webdev

Scaling Engineering Teams: Lessons from Google, Facebook, and Netflix

After spending over a decade in engineering leadership roles at some of the world’s most chaotic innovation factories—Google, Facebook, and Netflix—I’ve learned one universal truth: scaling engineering teams is like raising teenagers. They grow fast, develop personalities of their own, and if you don’t set boundaries, suddenly they’re setting the house on fire at 3am.

The difference between teams that thrive at scale and those that collapse into Slack-thread anarchy typically comes down to three key factors:

  • Structured goal-setting
  • A ruthless focus on code quality
  • Intentional culture building

Let me share some lessons I learned from scaling teams at Google, Facebook, and Netflix. Here are a few frameworks, metrics, and tools that actually work when you’re trying to scale from 10 to 100 to 1,000+ engineers—without losing your mind or your best people.

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Business, JavaScript, webdev

Craft Exceptional Web Experiences as a Full-Stack Engineer

At EspressoLabs.com, we’re on a mission to redefine the future of IT/Security management through exceptional user experiences and cutting-edge technology.
We believe that enterprise software should not only be powerful and scalable but also intuitive, elegant, and a joy to use.

We’re building a platform that merges AI-intelligence with seamless design—and we’re looking for a Full-Stack Developer who shares our passion for creating meaningful, impactful technology.


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How to Issue SSL Certificates on AWS with Certbot

SSL/TLS certificates are essential for any web application’s security, credibility, and functionality in today’s digital landscape.

Security is the primary reason certificates matter. They encrypt all data transmitted between users’ browsers and your server, protecting sensitive information like passwords, personal data, and payment details from interception by malicious actors. Without encryption, this data travels in plain text, making it vulnerable to man-in-the-middle attacks and eavesdropping.

Trust and credibility are immediately visible to users. Browsers display clear security indicators for HTTPS sites—a padlock icon and “Secure” label—while flagging HTTP sites as “Not Secure.” This visual cue significantly impacts user confidence and can directly affect conversion rates and user engagement.

Search engine optimization benefits are substantial. Google explicitly uses HTTPS as a ranking factor, meaning certificated sites receive preferential treatment in search results. This can significantly impact your site’s visibility and organic traffic.

Browser compatibility increasingly requires certificates. Modern browsers are progressively restricting features for non-HTTPS sites, including geolocation, camera access, and push notifications. Some browsers even block mixed content or display prominent warnings for HTTP sites.

Compliance requirements often mandate encryption. Many industry standards (PCI DSS, HIPAA, GDPR) require encrypted connections when handling sensitive data. Professional applications simply cannot operate legally without proper certificates in many regulated industries.

Ok, so we got the point that’s important (=critical) – If you’re a DevOps engineer working on an AWS-based setup and need to issue SSL certificates for a domain and its subdomains — like espressolabs.com and *.espressolabs.com — this guide is for you.

In this tutorial, we’ll use:

  • Let’s Encrypt for free SSL certificates
  • Certbot to automate the issuance
  • Route 53 for DNS-01 validation
  • Ubuntu EC2 instance
  • AWS Console
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Leveraging AI for Efficient Code Reviews

In today’s fast-paced development environment, leveraging AI tools for code reviews can significantly enhance productivity and code quality. As developers, we often work in isolation or wait hours (sometimes days) for our colleagues to review our pull requests. Large Language Models (LLMs) like GPT-4, Claude, and others can provide immediate feedback, spot potential issues, and suggest improvements within your favorite IDE.

This blog post explores how to craft effective prompts for LLMs when reviewing your code in VSCode, with specific examples for backend Node.js/Express developers and React frontend developers.

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Securing Your (NodeJS) Backend: A Comprehensive Guide to Preventing Common Attacks

Web security is a critical concern for any backend developer. If you’re building applications using Node.js and Express, it’s essential to safeguard your backend against common security threats such as SQL injections, cross-site scripting (XSS), cross-site request forgery (CSRF), and other vulnerabilities. This comprehensive guide explores these attacks in depth and demonstrates best practices to prevent them with practical coding examples.

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