Security Engineer
2018 - 2020Numbrs- Maintained, improved, and deployed Python-based in-house projects regarding security operations (SIEM, automated code review, and mobile app testing).
- Designed the architecture of a vulnerability management system involving all the company networks.
- Handled several security operation tasks including secure code reviews, security alert handling, network/system/mobile app auditing, among others.
Technologies: Python, Django, Django REST Framework, Kubernetes, Docker, Go, Shell Scripting, Linux, Burp Suite, Elasticsearch, Neo4j, MySQL, Selenium, Git, Jira, Appium, Information Security, DevOpsFull-stack Developer
2017 - 2018Hispasec- Maintained, improved, and deployed Python-based projects, including a ticket management system and crawling systems.
- Designed, developed, and deployed an automatic and scalable URL-browsing system using PhantomJS and content matching using Yara.
- Wrote frequently for an important Spanish daily infosec newsletter that specialized in vulnerability explanations for easier understanding.
Technologies: Django, Python, Django REST Framework, Linux, PhantomJS, Bootstrap, jQuery, YARA, Git, HTML, CSS, MySQL, JavaScript, Celery, RabbitMQ, Apache, NGINX, Gunicorn, Ansible, Shell Scripting, Information Security, DockerVirus Analyst | Back-end Developer
2016 - 2016Avira- Performed a malware analysis for potentially malicious samples (static and dynamic).
- Designed and programmed a data mining process for malware behavior.
- Developed services using RabbitMQ and Python.
- Fixed bugs and made improvements for a type of known clustering software developed in C.
Technologies: RabbitMQ, Python, C, Linux, Windows, Assembler x86, OllyDbg, Interactive Disassembler (IDA) Pro, Wireshark, VMware, VirtualBox, Malware Analysis, Information SecurityAnti-fraud Technician
2014 - 2016Hispasec- Analyzed fraud incidents (mainly phishing and Trojan viruses) and alerting involved parties to take down the threat.
- Collaborated with the malware department to help analyze Trojan viruses for instrumentation.
- Analyzed and reported vulnerabilities affecting products used by our clients.
Technologies: Python, Linux, Windows, Assembler x86, OllyDbg, Interactive Disassembler (IDA) Pro, Wireshark, VMware, VirtualBox, ZMap, Malware Analysis, Information Security
Carlos Ledesma
Python Developer in Málaga, Spain
Member since February 3, 2021
Carlos is a Python developer with a strong focus on information security. Having worked in security roles throughout his career, Carlos has been the go-to guy for development tasks and architectural discussions inside security teams. From reverse engineering to mobile test automation, Carlos is an all-around professional.
Carlos is now available for hire
Experience
- Linux 8 years
- Python 6 years
- Git 4 years
- Information Security 4 years
- Reverse Engineering 2 years
- Django REST Framework 2 years
- Docker 2 years
- Malware Analysis 2 years
Availability
Part-time
Preferred Environment
Python, Django, Linux
The most amazing...
...thing I've built was a Python framework for mobile test automation that allowed robust UI testing, file system interaction, HTTPS interception, and more.
Employment
Experience
- Grassbox | OSX Sandbox for Automated Malware Analysis (Prototype)https://github.com/Ravenons/grassbox
I was mentored by VirusTotal employees to find a proper way for executing malware in a controlled OSX environment and then retrieving behavioral information about the execution. I wrote a prototype in Python using DTrace, a language for kernel probing.
- Star Wars Battlefront Custom Resolution fixhttps://github.com/Ravenons/swbfresfix
I reverse-engineered the game settings so a custom graphic resolution could be specified. This tool modified the save-game feature, which specified the resolution, and then recalculated the proprietary checksum for it, so the game would accept it. The routine for the proprietary checksum was obtained through reverse-engineering.
- Automated Security Testing for Mobile Platforms
I built a framework for automating security testing in multiple platforms in Python, wrapping Selenium up (for iOS and Android). We wanted to write security tests for a mobile app, trying to make it as much platform-independent as possible.
One of the functionalities was sniffing mobile to back-end communication, for which I wrote a wrapper over mitmproxy (Python app) to control it programmatically. This way we were able to sniff the traffic between the app and back end and make assertions over the traffic.
Skills
Languages
Python, Assembler x86, TypeScript, Java, Go, HTML, CSS, JavaScript, C, MIPS, SQLFrameworks
Django, Django REST Framework, Selenium, Angular, DTrace, Appium, BootstrapPlatforms
Linux, Docker, Kubernetes, Burp Suite, Windows, OracleOther
Information Security, Networking, Reverse Engineering, Shell Scripting, Gunicorn, ZMap, Discrete Mathematics, Maltego, Malware Analysis, Quantum ComputingLibraries/APIs
PhantomJS, jQueryTools
Git, RabbitMQ, VirtualBox, Jira, YARA, Celery, Apache, NGINX, Ansible, OllyDbg, Interactive Disassembler (IDA) Pro, Wireshark, VMware, Weka, SnortParadigms
DevOpsStorage
Elasticsearch, Neo4j, MySQL
Education
- Master's Degree in Information Security2015 - 2017Open University of Catalonia - Barcelona, Spain
- Bachelor's Degree in Computer Science2010 - 2014University of Malaga - Málaga, Spain
Certifications
- Quantum Computing FundamentalsJUNE 2019 - PRESENTMIT xPRO
- Malicious Software and its Underground Economy: Two Sides to Every StoryJUNE 2014 - PRESENTCoursera
