<Cyber />
PORTFOLIO 2026

Thieveshkar
Kalaichelvan

Merging Defense with Architecture.

Cybersecurity Undergraduate & Full-Stack Developer. I build resilient systems and subject them to rigorous security testing.

Kali Linux Burp Suite Python AWS Cloudflare PHP
01. PROFILE

The Defender
& The Builder

I always knew my future was in IT, I just didn't realize how multifaceted that journey would be. My path began in Graphic Design, evolved into Web Development at Infinity Co., and has now reached my true target: Cybersecurity.

Currently, I work as a Web Developer managing e-commerce builds and cloud infrastructure, whilst maintaining a First Class average in my Cybersecurity degree at APIIT (Staffordshire University UK).

Get In Touch

Sec

  • Kali Linux
  • Burp Suite
  • Metasploit
  • Nmap
  • Wireshark
  • Nessus
  • Splunk

Dev

  • Python
  • PHP
  • JS
  • SQL
  • WordPress
  • Wix
  • AWS (EC2)
  • Cloudflare

Workflow

  • Git/GitHub
  • Jira (Agile)
  • Slack
  • Adobe Creative Cloud
02. CAREER

Experience

Web Developer (Part-time)

Infinity Co. • Colombo, Sri Lanka
May 2025 - Present
  • Deployment & Hosting: Managing domain/hosting setup via Hostinger, SSL configuration, and DNS management.
  • Cloudflare Security: Configured Advanced DNS, CDN caching, DDoS protection, and strict SSL/TLS policies.
  • Maintenance: Conducting security audits, resolving plugin conflicts, and ensuring styling consistency.

Web Development Intern

Infinity Co.
Nov 2024 - Apr 2025
  • E-Commerce Rebuild: Led design/dev of responsive site using WordPress/WooCommerce.
  • Custom UI/UX: Built custom mobile navigation, dynamic cart badges, and optimized checkout flows.
  • Payment Integration: Integrated Koko, Mintpay, Payz, PayHere, and SPayment gateways.
  • Cloud Infra: Managed AWS EC2 instances for staging and live production.
  • Agile: Workflow management via Jira and Slack.
03. WORK

Featured Projects

Offensive Security & Forensics

Privilege escalation via kernel exploit and deep digital forensics using Volatility and Splunk.

Kali Volatility Splunk

RootQuest CTF Box

Built a multi-stage exploitation VM with 10 challenges across Web, Crypto, Network, and Forensics.

CTF Dev VirtualBox Apache Crypto

Threat Analysis & Sim Lab

Analyzed DDoS and SQLi threats, defined protection protocols, and simulated attacks with IDS validation.

Blue Team DDoS Analysis Snort/IDS

Ethical Hacking Portfolio

Discovered critical vulnerabilities, executed attack simulations, and documented academic countermeasures.

Metasploit Nmap Nessus

Network Infrastructure

Secure network design for Campus ABC utilizing VLAN segmentation, RIP routing, and HSRP redundancy.

Packet Tracer VLAN Cisco

Infinity Co. E-Commerce

Designed and developed a fully responsive e-commerce platform using WordPress, Elementor, and WooCommerce.

WordPress PHP JS AWS

E-Police Lanka Platform

Digital services platform for Sri Lanka Police featuring online complaints, appointments, and traffic fine payments.

React.js Node.js PostgreSQL Sec

Python Portfolio

Collection of Python programs including financial calculators, tax systems, and library management tools.

Python Automation Data

Tech Gadgets Hub

Responsive website showcasing latest tech gadgets with intuitive navigation and multimedia.

Wix Web Design UI/UX

Groceries Supermarket

Dynamic web app for a supermarket featuring product categorization, order placement, and payments.

HTML/CSS JS JSON
04. ACHIEVEMENTS

Certificates

Advent Of Cyber 2025

TryHackMe

Burp Suite Essential Training

LinkedIn

Model Context Protocol

Hugging Face

Gemini Certified Student

Google

Lightweight AI with SLMs

LinkedIn

Vuln Scanner Project

LinkedIn

Cybersecurity Awareness: AI

LinkedIn

Log Analysis Foundations

Red Team Leaders

Running LLMs Locally

LinkedIn

OWASP Top 10

LinkedIn

Multimodal Prompting

LinkedIn

CompTIA A+ Practice

LinkedIn

Small Language Models

LinkedIn

AI-Driven Cyber Analyst

LinkedIn

PMI Agile Prep

LinkedIn

DesignHive Participant

Surge Global

Threat Landscape 2.0

Fortinet

Intro to Cybersecurity

Cisco

Packet Tracer Intro

Cisco

Python Essentials

Cisco