Open to opportunities · Paris, France

Koushiik Vadivel
Web Developer.

I build fast, clean, and reliable web products — full-stack, from UI to API to deployment.

A developer with a security edge: Alongside my development work, I'm completing an MSc in Cybersecurity at EPITA Paris — which means I write code with security built in, not bolted on.
3+
Years building
4
Projects shipped
2
Companies worked at
MSc
Cybersecurity, EPITA
About

Developer first.
Security-aware always.

Most developers treat security as someone else's problem. I'm currently doing an MSc in Cybersecurity specifically so I don't have to.

I'm a full-stack web developer with 3+ years of professional experience building backend systems, web applications, and APIs. I care about code that is clean, maintainable, and performs under real conditions.

My cybersecurity studies at EPITA Paris give me a practical understanding of how applications get compromised — and how to build them so they don't. Authentication, encryption, secure coding, and vulnerability thinking are a natural part of how I work.

I'm currently based in Paris and open to developer roles, internships, and freelance projects.

Get in Touch Freelance Services
Timeline
2024–Now
MSc Computer Security
EPITA, Paris, France
2023–24
Software Developer
K. S. Knit Fabrics
2021–23
Software Engineer
LTIMindtree
2017–21
BE Computer Science
SNS College of Technology, India
Languages
EnglishProfessional
TamilNative
FrenchA2 · Learning
Based in
Paris, France
Originally from Coimbatore, India
Skills

What I work with

The tools and technologies I use day-to-day. The security knowledge sits across all of these — it's not a separate column.

Languages
JavaScriptPythonSQLC / C++BashPowerShell
Frontend
ReactHTML5CSS3Responsive Design
Backend
Node.jsExpress.jsREST APIsgRPC
Databases
PostgreSQLMySQLMongoDBSQLite
Cloud & DevOps
AWSDockerCI/CDGit / GitHub
Security (MSc)
Secure CodingAuth & EncryptionPenetration TestingVulnerability AssessmentMalware AnalysisSOC / SIEM
Projects

Things I've built

Click any project to read more.

01
SOC Home Lab — Attack & Defence Simulation
Python · Splunk · Sysmon · Kali Linux · PowerShell
2025

Built a fully virtualised cybersecurity home lab that simulates real-world attack and defence scenarios. Set up Windows and Linux endpoints instrumented with Sysmon, forwarding telemetry to a Splunk SIEM. Developed Python scripts for automated log parsing, alert correlation, and anomaly detection. Created dashboards for incident triage and response workflows.

PythonPowerShellBashSplunkSysmonKali LinuxVirtualBox
02
CYBERDOG — Password Manager
React.js · Node.js · Express · AES-256 · Zero-Knowledge
2025

A full-stack password manager built with a zero-knowledge architecture — the server never sees plaintext credentials. Frontend built in React with real-time password generation and vault management. Backend in Node.js with AES-CBC encryption, HMAC verification, and Argon2 key derivation. Designed to demonstrate how security can be embedded at every layer of a web application.

React.jsNode.jsExpressSQLiteAES-256Argon2Python
03
Hybrid Home Automation System
C · Python · REST APIs · Raspberry Pi · MQTT
2020

Designed and built a home automation system integrating IoT sensors with a web-based control panel. Developed REST APIs for device registration, authentication, and secure MQTT-based communication. Published as a conference paper at ICTTE 2019.

CPythonREST APIsRaspberry PiMQTTHTML/CSS/JS
04
Agriculture Automation via IoT
Python · Node.js · MongoDB · Raspberry Pi · Sensors
2019

Full-stack IoT system for real-time monitoring and control of agricultural conditions. Sensor data (DHT11, soil moisture) fed into a Node.js backend and MongoDB store. A REST API allowed remote threshold management and live data visualisation.

PythonNode.jsExpressMongoDBRaspberry PiDHT11
Experience

Where I've worked

Jan 2021 – Mar 2023
LTIMindtree
Software Engineer
  • Developed and maintained a backend system for customer premium and loss processing, improving data efficiency by 12%.
  • Integrated security best practices throughout the codebase, reducing surface-level vulnerabilities in production.
  • Built and managed CI/CD pipelines with Docker, cutting deployment time by 20%.
  • Collaborated with business analysts to identify risks and implement mitigations before release.
Apr 2023 – Nov 2023
K. S. Knit Fabrics
Software Developer
  • Designed and built responsive web pages using HTML5, CSS3, and JavaScript.
  • Implemented real-time order tracking and personalised recommendations, improving customer engagement by 15%.
  • Streamlined version control workflows with GitHub, boosting team efficiency by 10%.
Dec 2019 – Jan 2020
AIESEC · Egypt
Global Entrepreneur — Business Development
  • Assisted local startups with scalable business plans, market research, and stakeholder presentations.
  • Worked with an international team across cultural boundaries — improved communication and adaptability.
Education

Academic background

BE Computer Science
SNS College of Technology
Coimbatore, India · 2017 – 2021
C, C++, Java, Python, Web Technologies, IT Strategy, Software Engineering
Credentials

Certifications & Publications

Certification
Cisco Networking Academy
  • Introduction to Cybersecurity
  • Junior Cybersecurity Analyst Career Path
View on Credly
Publication
International Conference on Trends in Technology & Engineering
  • Hybrid System for Home Automation Using IoT
  • Reference: ICTTE19030
View Certificate

Want the full picture?

Download my CV — skills, experience, and everything in between.

Download CV
Contact

Let's talk.

Whether you're hiring, have a project in mind, or just want to connect — I'm happy to hear from you. I reply within 24 hours.