Freelancer profile translated to English.
Back to original languageAbout Nicolas
- Secure Web Developer & OSINT Investigations | Short Gigs (1-5 days)
I develop web applications and secure them. I also conduct open-source intelligence (OSINT) investigations for verification or due diligence needs.
Currently pursuing a Master's in Cyber Defense, available for one-off missions only.
Technical Stack: React, Next.js, TypeScript, Node.js, Prisma, REST/GraphQL
Security: Web penetration testing, OWASP Top 10, vulnerability analysis
MY OFFERS
- Express Security Audit : I scan your web application and deliver a report with critical vulnerabilities ranked by priority and suggested fixes. Turnaround: 2-5 days | Deliverable: Actionable PDF Report
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- Pre-Production Security Review: Before your go-live, I check your code for critical vulnerabilities. Turnaround: 2-3 days | Deliverable: Validated Checklist + Points to Correct
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- Urgent Security Fix: Identified a vulnerability or failed a client audit? I'll intervene to fix vulnerabilities with your team. Turnaround: 1-2 days | Deliverable: Implemented Fixes + Documentation
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- OSINT Person Report : Comprehensive profile on an individual's digital footprint from open sources. Useful before senior recruitment or partnership. Conducted via Sentry, my specialized digital investigation service. Turnaround: 2-5 days | Deliverable: Structured PDF Report
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- OSINT Company Report : Mapping of a company's digital exposure: exposed data, informational attack surface, social engineering risks. Conducted via Sentry, my specialized digital investigation service. Turnaround: 5-7 days | Deliverable: PDF Report with Recommendations
French
Native or bilingual
English
Fluent
Spanish
Basic
Can work on-site
Paris (up to 50km)
Experience
- Sentry AgencySentry: OSINT Investigation AgencyCONSULTING AND AUDITSOctober 2025 - Today (10 months)Paris, FranceSentry is an agency specializing in OSINT (Open Source Intelligence) investigations and digital intelligence applied to cybersecurity.Founded by Nicolas Carteado, an expert in offensive security and data analysis, the agency assists companies, institutions, and individuals in managing their digital footprint and preventing information-related risks.Our areas of expertise:OSINT Intelligence: Collection, correlation, and analysis of information from open sources to identify emerging threats, leaks, or human vulnerabilities.Exposure Analysis and Reputation Management: Online presence audits, detection of publicly accessible sensitive data, assessment of social engineering risks.Monitoring and Strategic Watch: Monitoring social media, specialized forums, and the dark web to anticipate attacks and protect brand reputation.Security Consulting and Support: Development of information defense strategies and data protection awareness.At Sentry, we put intelligence at the service of security, transforming open data into actionable information.Our mission: to provide a clear, reliable, and actionable view of digital threats, enabling our clients to regain control of their image and information.
- MiwAIInformation Systems Security AnalystTECHMay 2024 - September 2025 (1 year and 4 months)Paris, FranceI developed a B2B SaaS solution built with React.js/Node.js that revolutionizes companies' recruitment processes. This platform uses artificial intelligence and speech-to-text technology to automatically transcribe job interviews and generate structured candidate skill profiles.The system analyzes verbal exchanges in real-time to identify, categorize, and evaluate technical and behavioral skills mentioned, providing recruiters with a detailed and objective post-interview report.This experience allowed me to gain in-depth technical expertise in integrating AI APIs, processing sensitive voice data, and designing secure architectures for B2B environments with demanding confidentiality and candidate data protection requirements.
- Sociétés DiversesFullstack Web DevelopmentTECHJanuary 2023 - Today (3 years and 7 months)Paris, FranceI develop websites and applications for individuals and businesses, utilizing my skills in HTML5, CSS3, JavaScript, as well as ReactJS, TypeScript, NextJS, and TailwindCSS to create modern and responsive interfaces.Some projects:• sentry-agency.com• easy-push.fr• monboldair.com• ordre-des-devs.orgI also use full-stack technologies including Node.js, Prisma, databases, and REST APIs. These projects have allowed me to gain practical expertise in web application development, third-party API integration, and performance optimization, while meeting real client needs.
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Education
- Cybersecurity & AI TrainingTalTech - Tallinn University of Technology2025Cybersécurité & Intelligence Artificielle dans l'une des universités technologiques les plus renommées d'Europe du Nord. Programme couvrant l'intégration de l'IA dans les systèmes de sécurité, la détection automatisée de menaces par machine learning, l'analyse comportementale et la cybersécurité prédictive. Apprentissage des techniques de défense autonome et des systèmes de réponse aux incidents assistés par IA. Formation pratique sur les plateformes de cyber-range et les environnements de simulation avancés, dans un écosystème numérique estonien reconnu mondialement pour son innovation en cybersécurité.
- Cybersecurity & Ethical Hacking TrainingEFREI Paris2025Actuellement en formation de Cybersécurité & Ethical Hacking à l'EFREI Paris, je suis expert en techniques offensives et défensives de la sécurité informatique. Cette formation d'excellence m'a permis de maîtriser les tests d'intrusion avancés, l'analyse de vulnérabilités critiques et l'évaluation complète de la sécurité des systèmes d'information. Je suis spécialisé dans l'exploitation de vulnérabilités, les techniques sophistiquées de contournement de sécurité et le développement full-stack. Mon expertise couvre l'ensemble du spectre de la sécurité numérique, des audits de sécurité aux stratégies de protection avancées en environnement professionnel.
Certifications
- Cybersecurity FundamentalsIBM
- Practical Introduction to Quantum-Safe CryptographyIBM2025