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Enrique Martínez FerrerEM

Enrique Martínez Ferrer

Full Stack Developer

€222/day
Madrid, ES
3-7 years

Average response time: 1 hour

About Enrique

I help companies build and improve modern web and mobile applications using React, React Native, TypeScript, JavaScript and Node.js.

My profile combines full stack development with a cybersecurity background, which allows me to approach projects with a strong focus on clean code, maintainability, security, API integrations and real product needs.

I have worked on mobile and web products with React Native, React, TypeScript, Vite, authenticated REST APIs, Amazon Cognito, Node.js/Express, MongoDB and JWT. I can help with frontend development, mobile app features, admin panels, API integrations, responsive interfaces, debugging, technical improvements and full stack features.

I am especially comfortable working on:
- React / TypeScript web applications
- React Native mobile applications
- Full stack JavaScript projects with Node.js and MongoDB
- REST API integrations
- Internal tools, dashboards and admin panels
- Technical reviews, documentation and security-aware improvements

I like working in a practical and transparent way: understanding the business need, proposing a clear solution, building it carefully and keeping communication simple and direct.
  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Madrid (up to 40km)

Experience

  • Alter Technology TÜV NORD
    Junior Technician
    TELECOMMUNICATIONS
    June 2025 - November 2025 (5 months)
    Tres Cantos, Spain
    • • Evaluation of connected devices in accordance with the RED Directive, especially cybersecurity requirements under Article 3.3 d/e/f.
    • • Performed penetration testing activities on IoT devices and LTE/5G environments in controlled laboratory settings.
    • • Configuration of mobile network environments for security audits using LimeSDR and srsRAN.
    • • Identification and validation of vulnerabilities using tools such as Burp Suite, Nmap, and Nessus.
    • • Validation and certification of routers (CPE) in operator environments through TR-069 / CWMP and ACS.
    • • Verification of Wi-Fi configurations, consistency between backend, WebUI, and real device behaviour, including issue analysis and technical documentation.
    Cybersecurity Penetration Testing IoT Security Network Security Vulnerability Assessment
  • TSS Ciberseguridad
    Red Team, Intern
    DIGITAL AND IT
    January 2025 - May 2025 (4 months)
    Madrid, Spain
    • • Participated in simulated internal and external security assessments in controlled environments.
    • • Performed network scanning, enumeration, and web vulnerability exploitation activities aligned with OWASP Top 10 (CSRF, DoS, SMBGhost, BlueKeep, etc.).
    • • Used tools such as Kali Linux, Burp Suite, Hydra, Nessus, Nmap, SQLmap, and WPForce for penetration testing activities.
    • • Produced technical audit reports with mitigation recommendations.
    • • Automated testing tasks in controlled environments, including IP block management, IP rotation, and the use of supporting tools to maintain testing continuity.
    Penetration Testing OWASP Top 10 Kali Linux MetaSploit Vulnerability Assessment
  • CT3 Ingeniería
    IT Department, IT Technician
    ENERGY AND UTILITIES
    February 2023 - January 2024 (11 months)
    Majadahonda, Spain
    • • Developed a web application as a Full Stack Developer for an energy plant visualisation platform using C#, JavaScript, HTML, CSS, and .NET.
    • • Created and integrated relational databases with SQL Server Express, applying filters and optimised structures.
    • • Carried out code validation and deployment in Microsoft Azure.
    • • Designed and built a database containing useful information on Spanish expatriate public sector workers.
    JavaScript ASP.NET Core SQL Server C# Microsoft Azure

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Education

  • Higher Vocational Training in Multiplatform Application Development (DAM)
    Colegio Retamar
    2023
    Higher Vocational Training in Multiplatform Application Development (DAM)
  • dvanced Course in Cybersecurity (200 h)
    Deusto Formación
    2024
    dvanced Course in Cybersecurity (200 h)

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