John Decorte

Fullstack & Security Engineer crafting resilient, real-time systems — from startups to scale. Bug bounty hunter & CTF enthusiast.

PORTFOLIO

Discover what I've created

Each piece reflects my passion for innovation and commitment to delivering high-quality results. Feel free to explore and get inspired!

/02

Get Next Line (GNL)

Implemented the get_next_line function to read files line by line with efficient buffer management.

/03

Minishell in C

Recreated a Unix-like shell with pipelines, redirections, environment expansion, and built-in commands.

/01

Web server in C++

Implemented a standards-compliant HTTP/1.1 server in C++ featuring non-blocking I/O, request parsing, routing, and CGI execution. Built a flexible configuration system for virtual hosts, custom error pages, and limits, then validated behavior against real browser and benchmark clients. Hardened the server with timeouts, error handling, and protocol edge-case tests to ensure reliable responses under load.

My Open Source Journey

Each green square represents a day of contribution, a step towards better software for everyone.

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Latest write ups

Published on
September 10, 2025
BGP at Doors of Autonomous Systems is Simple
bgp evpn vxlan networking gns3 docker
A comprehensive journey into modern data center networking technologies. Explore network virtualization, VXLAN tunneling, and BGP EVPN control planes through hands-on GNS3 implementation. Progress from Docker container setup through advanced overlay networking, gaining practical skills used by major cloud providers.
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Published on
March 20, 2025
AWS Cloud Practitioner Certification Cheat Sheet
AWS Cloud-Practitioner Certification Cheat-Sheet Exam-Guide
Quick reference guide for passing the AWS Certified Cloud Practitioner (CLF-C02) exam with all essential concepts, services, and exam tips.
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