Samuel Nwankwo

@saminwankwo

Software Developer

Port Harcout, NigeriaJoined June 2022

About

I am a software developer based in Nigeria with some years of experience in the industry. I am an expert in several programming languages, including PHP, JavaScript, and Java for Android development. When I am not coding, I enjoys playing video games and watching sci-fi movies. I am also an avid reader and enjoys learning about new technologies and programming concepts.

Available for

I'm available to work with you, serve as a mentor, and foster your development.

Samuel Nwankwo's blogs

Samuel Nwankwo's blogsaminwankwo.hashnode.dev20 posts

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Recently published

SNSamuel Nwankwosaminwankwo.hashnode.devNov 18, 2025 · 5 min read

Introduction to System Design

System design started clicking for me after working through the To-Do app in Part 1. So today, I took things a step further by exploring a deceptively simple but incredibly insightful system: the URL shortener. TinyURL, Bitly, t.co — they all look si...

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SNSamuel Nwankwosaminwankwo.hashnode.devNov 14, 2025 · 5 min read

Introduction to System Design

System design can feel overwhelming when you’re just starting out, but breaking it down into structured modules makes everything clearer.On the first day, I learned the foundations of system design using a simple To-Do list application — and this han...

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SNSamuel Nwankwosaminwankwo.hashnode.devMar 12, 2025 · 4 min read

Technical Deep Dive: Defending Your Backend from Steganography Attacks

At Olotu square recent Hackday event, I witnessed a live demonstration where an image file was manipulated to hide malicious code. This scenario—where attackers exploit file upload vulnerabilities through steganography—prompted me to explore a highly...

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SNSamuel Nwankwosaminwankwo.hashnode.devFeb 24, 2025 · 4 min read

How I Prevented Signups from Temporary Emails on My Website

A while back, I noticed a surge in fake signups on an application I was working, which was causing unnecessary spam and security risks. These accounts would clutter my database, distort analytics, and even attempt fraudulent activities. I knew I had ...

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SNSamuel Nwankwosaminwankwo.hashnode.devFeb 5, 2025 · 4 min read

How I Automated MongoDB Backups with Node.js

I remember the day when one of my projects lost critical data due to an accidental deletion. It was a painful lesson, but it pushed me to automate my MongoDB backups. Let me walk you through how I set up an automated backup system using Node.js—somet...

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Samuel Nwankwo

About

Available for

Samuel Nwankwo's blogs

Recently published

Introduction to System Design

Introduction to System Design

Technical Deep Dive: Defending Your Backend from Steganography Attacks

How I Prevented Signups from Temporary Emails on My Website

How I Automated MongoDB Backups with Node.js

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Samuel Nwankwo

About

Available for

Samuel Nwankwo's blogs

Recently published

Introduction to System Design

Introduction to System Design

Technical Deep Dive: Defending Your Backend from Steganography Attacks

How I Prevented Signups from Temporary Emails on My Website

How I Automated MongoDB Backups with Node.js