API for obtaining exchange rates of the bolivar
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Hi, I'm Sebastian Cheikh.
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I'm a passionate software architect dedicated to building exceptional software experiences. I enjoy leveraging modern technologies to create efficient and impactful applications with clean, user-centric designs.
About me
Beyond the code.
My development journey began over 9 years ago, driven by the curiosity of understanding how things work behind the screen. I have evolved from creating basic scripts to designing complex distributed architectures.
I specialize in the JavaScript ecosystem, but I consider myself technology-agnostic: I use the right tool for the job. I am passionate about clean code, web accessibility, and performance optimization.
When I am not coding, you will find me exploring interface design, contributing to Open Source projects, or searching for the perfect cup of coffee.
9+ Years Exp.
80+ Projects
100% Commitment
Expertise
Tech Stack
Working at: byteTECH
Frontend
Creating reactive, accessible, and pixel-perfect interfaces.
Angular / Next.js / Astro / Flutter 95%
TypeScript 90%
Tailwind CSS / Sass 90%
SPA MPA SSR SSG CSR ISR PWA Micro-Frontends
Backend
Robust business logic, RESTful APIs, and GraphQL.
Bun / Node / Go / Java / C / Python / Dart 95%
PostgreSQL / MongoDB / Oracle / SQL Server / Redis / DragonFly / MariaDB 90%
Http / GraphQL / WebSockets / gRPC / RabbitMQ / Kafka 90%
Monolith Microservices Bff Serverless Event-Driven
Tools & DevOps
Deployment management, version control, and testing.
GitDockerAWSVercelTestingMicroServicesCI/CDLinuxCiberSecurityIANginxKubernetesCloudflare
Mobile First Approach
Guaranteed responsive design
My favorite stack now
Technologies that I love
Projects
Featured Projects
Writing
Articles & Thoughts
Career
Microsoft and Google Interviews: The Raw Truth
Everything you need to know about technical interviews at Big Tech: data structures, algorithm patterns, Big O, and the famous challenge that marked me at 13 years old.
Feb 5, 2026
Personal
My Journey in Cybersecurity: From Victim to Defender
How constant attacks on my Minecraft network awakened my passion for cybersecurity, and the journey from then until becoming someone who protects systems and fights cybercriminals.
Feb 3, 2026
Architecture
Design Patterns in TypeScript
Complete guide to creational, structural, and behavioral design patterns. Practical examples in TypeScript showing problems and solutions.
Jan 30, 2026
Security
Secret Management with GhostEnv
Why .env files are a real risk, bots that scan 24/7, and how to inject secrets in memory without exposing keys. Includes team workflow: only the tech lead sees variables; the team deploys without seeing them.
Jan 28, 2026
Architecture
Microservices vs. Monolith: The Great Debate
Advantages, disadvantages, and when to use each one. Why a well-built monolith is often better than poorly implemented microservices.
Jan 27, 2026
Architecture
Astro v5: The Beast of the Web
Astro 5.0: Content Layer, Server Islands, SSG and SSR as siblings, astro:env, Vite 6. Everything you can do with the framework for fast, SEO-friendly sites. My portfolio is built 100% in Astro vanilla and I use it in many projects.
Jan 25, 2026
Architecture
Latency vs. Throughput
Understanding the vital difference: Is your system slow for one user (latency) or does it collapse with many users (throughput)? Different strategies for different problems.
Jan 23, 2026
Fundamentals
Roadmap 2026: Where to Start?
The main areas of modern programming and what to learn depending on where you want to stand out. A complete guide to choosing your path in software development.
Jan 23, 2026
Architecture
Event Sourcing and CQRS
Advanced patterns for systems that need an immutable history of everything that happened (Fintech, E-commerce, Auditing).
Jan 20, 2026
Architecture
Containers and Orchestration (Docker & K8s)
How to create lightweight, secure images and handle auto-scaling when your application suddenly goes viral.
Jan 13, 2026
Fundamentals
Clean Code: Programming for Humans
Why clean code isn't for the CPU, but for your future self and your teammates. How to write code that doesn't need a deciphering manual.
Jan 8, 2026
Business
Maintenance vs. Innovation
A founder's balance: when to stop creating new 'features' to ensure your project is stable and fast.
Jan 7, 2026
Architecture
Thinking in Systems, Not in Code
Code is ephemeral and gets replaced, but architecture is what allows a company to survive success. How to design thinking in flows and not just in syntax.
Jan 2, 2026
Architecture
WebAssembly (Wasm): The Future in the Browser
How to bring the power of heavy C++ or Rust processing to the web, breaking the traditional limits of JavaScript.
Dec 31, 2025
Frontend
The Great Debate: Modern Frontend Frameworks
Honest comparison of Vue, React, Astro, Angular and Svelte. Analysis of their latest versions, strengths, weaknesses and when to use each.
Dec 30, 2025
Security
Zero Trust Architecture
Strategies for 'Never trust, always verify' in internal networks. Why not to trust the network by default and how to apply Zero Trust in practice.
Dec 28, 2025
Architecture
Chaos Engineering: Breaking Things on Purpose
Introduction to Netflix's philosophy: randomly shutting down servers in production to see if your recovery system (that you designed in Series II) really works.
Dec 25, 2025
Architecture
Architecture Applied to an E-commerce
Practical case: requirements, scalability, inventory and transaction handling. How professional sales software is designed from scratch.
Dec 23, 2025
Fundamentals
Introduction to Programming
A complete guide to understanding what programming is, how it works, and the fundamental concepts every developer should know.
Dec 22, 2025
Architecture
Data Modeling: SQL vs. NoSQL
When to normalize data for consistency and when to denormalize for performance. Choosing the right database for the problem.
Dec 15, 2025
Fundamentals
The Myth of the Perfect Language
Why you shouldn't marry a technology. The importance of mastering the fundamentals (HTTP, Memory, Databases) above trends.
Dec 14, 2025
Fundamentals
AI as Copilot, not Captain
My stance on using LLMs: how to boost your speed without losing the ability to understand what's happening 'under the hood'.
Dec 12, 2025
Architecture
Your Local Server: The Architect's Lab
Self-hosting dev tools and data sovereignty. Why having a local (or home) server for learning, experimenting, and controlling your data matters.
Dec 12, 2025
Architecture
High-Performance Cache Strategies
Differences between in-memory cache (Go) and distributed systems like Redis. How to drastically reduce your app's latency.
Dec 11, 2025
Architecture
Communication Between Systems
REST vs. GraphQL, WebSockets or gRPC for binary speed, and Message Brokers (RabbitMQ/Kafka) for async processes that don't block the user.
Dec 8, 2025
Fundamentals
Definitive Guide to Version Control
The professional Git workflow every dev should follow to never lose a file.
Nov 24, 2025
Architecture
RAG (Retrieval-Augmented Generation) from Scratch
Feeding an AI with your own documents without hallucinations. How RAG works, why it reduces hallucinations, and how to build it from scratch.
Nov 24, 2025
Fundamentals
SOLID Principles in Real Life
Engineering concepts explained with practical examples to understand why Single Responsibility prevents everything from collapsing.
Nov 24, 2025
Personal
The story of how I was expelled from my school
Reflections on traditional education, creativity, and learning outside the classroom.
Nov 14, 2025
Architecture
Architecture: The Key to Survival
The importance of choosing the right initial structure. How today’s decisions affect the people who will maintain the software in 5 years.
Nov 12, 2025
Architecture
MCP (Model Context Protocol)
Anthropic's standard for connecting AIs to your local data. What MCP is, what it's for, and how it lets Claude and other apps use your tools and data sources.
Nov 10, 2025
Security
SQL Injection, XSS and CSRF: Security in the Frontend and Backend
Technical explanation of how these attacks actually work, what vulnerable code looks like, and how modern ORMs and best practices prevent them.
Oct 26, 2025
Architecture
VPS vs. Serverless vs. Bare Metal
Where should your code really live? An honest comparison of VPS, serverless, and bare metal: cost, control, scalability, and when to choose each.
Oct 18, 2025
Fundamentals
Professional Error Handling
Why returning null is a bad practice. Introduction to Result Patterns and how to manage exceptions without cluttering business logic.
Oct 14, 2025
Business
Legacy Code: The Monster That Feeds You
How to manage old code that embarrasses you today but still makes money in production.
Oct 10, 2025
Fundamentals
Why Learning C Makes You a Better JavaScript (and Other Languages) Programmer
How understanding pointers and memory management helps you understand why your React app uses 2GB of RAM and how to think about performance for real.
Sep 28, 2025
Fundamentals
The 10 Horsemen of the Software Apocalypse
Analysis of critical failures: Race Conditions, Deadlocks, Memory Leaks, Integer Overflow, Thundering Herd, Cache Stampede, SQL/NoSQL injection, Buffer Overflow, Dependency Hell, and Retry Storms.
Sep 22, 2025
Architecture
Horizontal and Vertical Scaling: What They Are, When to Use Each
Differences between scaling up (more CPU/RAM) and scaling out (more machines). Advantages, disadvantages, and how to decide based on your problem.
Sep 15, 2025
DevOps
Surviving the Linux Terminal
Survival guide for developers: essential commands for navigating, editing, and debugging Ubuntu servers.
Sep 15, 2025
Personal
My Story
The journey of how curiosity and necessity led me to build high-scale software at 17 years old.
Jul 25, 2025
No articles published yet.
My Company
byteTECH
The Origin
Founded byteTECH to bridge the gap between complex system engineering and user needs. My focus is to create software that not only works but is a strategic asset.
Mission
Power businesses by transforming complex ideas into intuitive and scalable digital products.
Vision
Lead the change towards invisible technology, where efficiency and design are one and the same.
Our Services
Development
Web apps and SaaS built with modern and efficient architectures.
Consulting
Design focused on the user with a software engineering approach.
Scalability & Cloud
Infrastructure ready for the real growth of your business.
Testimonials
Client Feedback
"The technical expertise at byteTECH is unmatched. They optimized our infrastructure using Go, reducing our server costs significantly while doubling our speed"
CR
Carlos Rodriguez
CEO Pelican Host
"byteTECH captured the essence of our architectural studio perfectly. The website is not only visually stunning and minimalist but also incredibly fast. It has become our most powerful portfolio tool"
LR
Liliamira Rosales
CEO Espacio 7
"The custom WMS developed by byteTECH has been a total game-changer for our logistics. They took the time to understand our unique warehouse workflow and built a high-performance solution that has increased our fulfillment speed by 40%. Their technical expertise in complex systems is outstanding"
RR
Rafael Rosales
CEO KWC INC
"Managing event guest lists used to be a nightmare until we started using Invitex by byteTECH. The check-in process is now seamless, and the real-time analytics for our events are a total game-changer for our planning team"
RA
Rafael Alvarado
Event Planner
"The automation system byteTECH built for us completely transformed our operations. We’ve reduced manual order entry by 80% and our customer response time is now nearly instantaneous. Absolute efficiency"
PM
Patricia Manzano
CEO Wendys Kids
"Security is non-negotiable for us, and byteTECH exceeded our expectations. They conducted a deep audit and implemented a multi-layered defense system that has kept our infrastructure bulletproof. Knowing our data is protected by byteTECH gives us total peace of mind"
NH
Nidal Hashem
CEO Milano Group
"The technical expertise at byteTECH is unmatched. They optimized our infrastructure using Go, reducing our server costs significantly while doubling our speed"
CR
Carlos Rodriguez
CEO Pelican Host
"byteTECH captured the essence of our architectural studio perfectly. The website is not only visually stunning and minimalist but also incredibly fast. It has become our most powerful portfolio tool"
LR
Liliamira Rosales
CEO Espacio 7
"The custom WMS developed by byteTECH has been a total game-changer for our logistics. They took the time to understand our unique warehouse workflow and built a high-performance solution that has increased our fulfillment speed by 40%. Their technical expertise in complex systems is outstanding"
RR
Rafael Rosales
CEO KWC INC
"Managing event guest lists used to be a nightmare until we started using Invitex by byteTECH. The check-in process is now seamless, and the real-time analytics for our events are a total game-changer for our planning team"
RA
Rafael Alvarado
Event Planner
"The automation system byteTECH built for us completely transformed our operations. We’ve reduced manual order entry by 80% and our customer response time is now nearly instantaneous. Absolute efficiency"
PM
Patricia Manzano
CEO Wendys Kids
"Security is non-negotiable for us, and byteTECH exceeded our expectations. They conducted a deep audit and implemented a multi-layered defense system that has kept our infrastructure bulletproof. Knowing our data is protected by byteTECH gives us total peace of mind"
NH
Nidal Hashem
CEO Milano Group
Contact Me
Let's work together.
I am always open to discussing new projects, creative ideas, or opportunities to be part of your visions.
bytetechedu@gmail.com
Maracaibo, Venezuela