Emmanuel Elekwachi

Multidisciplinary freelance engineer specializing in full-stack development and cybersecurity operations. Experienced with secure app development, SIEM deployment, and cloud infrastructure hardening. CompTIA-certified, with a proven record of delivering agile, scalable, and secure solutions tailored to client needs. Adept at working across both enterprise and startup environments, translating security threats into actionable insights, and building tools to streamline operations and prevent breaches.

PERSONAL / CORPORATE PROJECTS

I have had the privilege of contributing to a diverse array of projects throughout my career, each of which has allowed me to cultivate a unique skill set and gain valuable experience. These projects encompass a wide spectrum of functionalities and applications, demonstrating my versatility and commitment to delivering

Node.js Coding Projects

• Click Counters: I have successfully developed click counter applications, which have been employed to track and analyze user interactions on various websites and platforms. These tools have played a crucial role in understanding user engagement and optimizing user experiences.
• Email Validator: My expertise extends to the creation of robust email validation systems, ensuring the accuracy and legitimacy of email addresses. These systems have been pivotal in enhancing data quality and communication efficiency for the projects I've been involved in.
• Domain Validator: I have also designed and implemented domain validation mechanisms, guaranteeing the validity and reliability of web domains. Such tools have been integral in safeguarding against security threats and maintaining the integrity of web-based applications.
• Sign-up and Login Pages: Crafting secure and user-friendly sign-up and login interfaces has been a core focus of my work. These pages have served as the gateway to countless online platforms, prioritizing user authentication and data protection.
• Clothing App for Seamstresses: I had the privilege of developing a specialized application tailored to the needs of seamstresses. This app facilitated order management and monitoring, streamlining the workflow for these professionals and enhancing their efficiency in delivering quality products.
• Personal Blog Projects: Additionally, I have undertaken personal blog projects, where I have leveraged my creative and technical skills to build engaging and interactive blog platforms. These projects have allowed me to express my passion for content creation and storytelling.

Cyber Security/Penetration testing Projects

• Local Network Intrusion Detection System (IDS):
  Built a lightweight Python-based IDS to monitor home lab network traffic using Scapy and log abnormal activity. Implemented basic pattern matching for common attack signatures and alerts for port scanning and brute-force attempts.
• Custom Phishing URL Scanner:
  Developed a tool that scans URLs and domains for known phishing patterns using VirusTotal API and regex filters. Integrated with a Slack bot to provide real-time phishing checks.
• Password Hash Cracking Sandbox (Ethical Use Only):
  Created a sandbox to test password hash strength using common cracking tools (e.g., John the Ripper, Hashcat). Used it for awareness demos on secure password storage techniques.
• Secure File Sharing Web App:
  Built a private encrypted file drop service with Node.js, Express, and AES encryption. Designed for safe temporary sharing of sensitive files with
  auto-expiry and audit logging.
• Two-Factor Authentication (2FA) System:
  Implemented a custom 2FA mechanism for local test apps using
  TOTP (Time-Based One-Time Passwords) with Google Authenticator support.
• Vulnerability Scanner (Basic):
  Coded a basic web vulnerability scanner that checks websites for outdated components, open ports, weak headers, and insecure cookies. Perfect for small business site audits.
• Encrypted Notes App:
  Built a secure notes web application that encrypts content in-browser
  using Web Crypto API. No server-side storage of secrets—zero knowledge style.
• Linux Hardening Script:
  Created a Bash automation script to harden Ubuntu servers (firewall setup, SSH configuration, root access lockdown, log monitoring setup).
  Used in personal cloud servers.
• Browser Extension to Detect Malicious Scripts:
  Developed a Chrome extension that flags third-party scripts from known shady domains and gives visual alerts on unsafe pages.
• Security Awareness Simulator:
  Built a mini dashboard that mimics phishing emails and malicious
  links for training purposes. Used to educate small teams on safe
  browsing habits and phishing recognition.

Comptia Network+