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

saminwankwo.hashnode.dev

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...

Nov 18, 20255 min read

saminwankwo.hashnode.dev

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...

Nov 14, 20255 min read

saminwankwo.hashnode.dev

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...

Mar 12, 20254 min read

saminwankwo.hashnode.dev

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 ...

Feb 24, 20254 min read

saminwankwo.hashnode.dev

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...

Feb 5, 20254 min read

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