🔐 Ethical Hacker & Cybersecurity Expert | Turning Systems into Fortresses 🔐 I don’t just find security gaps - I break in before the bad guys do and help you lock them out for good. With years of hands-on experience in penetration testing, I specialize in uncovering hidden threats and fortifying your digital assets. Whether it's your network, web applications, mobile apps, or cloud infrastructure, I ensure you're always one step ahead of cybercriminals. 🚀 What I Can Secure for You: ✅ Network Penetration Testing - Identifying weak entry points in your internal & external networks, firewalls, VPNs, and Wi-Fi security to prevent unauthorized access. ✅ Web Application Security - Testing for SQL injection, XSS, authentication flaws, logic bypasses, and API vulnerabilities to secure your web apps from attacks. ✅ Mobile App Security (iOS & Android) - Ensuring your apps are safe from reverse engineering, insecure storage, and API exploitation to protect user data. ✅ Cloud Security (AWS, GCP, Azure & More) - Evaluating IAM misconfigurations, S3 bucket leaks, privilege escalation risks, and misconfigured cloud assets before hackers do. 📜 Comprehensive Reporting & Actionable Remediation Every assessment includes a detailed security report outlining: 🔎 Every vulnerability discovered - ranked by severity 📌 Proof-of-concept exploits to demonstrate the impact 🛠 Step-by-step remediation guidance to fix the issues 🎯 Strategic security recommendations to strengthen your defenses ⚡ Don’t Wait for a Breach - Stay Ahead of the Attackers! ⚡ Whether you’re a startup, enterprise, or cloud-native business, securing your assets is not optional, it’s critical. Let’s fortify your defenses today and keep your business safe from unseen threats. 💬 Let’s Talk Security! Message me now to discuss your needs. 🚀🔒

✅ Professional Penetration Tester ✅ 3500+ Hours ✅ Top Rated Plus Freelancer Security Researcher and Penetration Tester recognized by the U.S. Department of Defense, AT&T, Sony, and Semrush for the responsible disclosure of 40+ vulnerabilities via HackerOne. Since 2022, an active member of the Synack Red Team - an elite tier of offensive security specialists vetted through rigorous technical and background screening. Every engagement concludes with a comprehensive technical report built to satisfy the specific penetration testing controls required for HIPAA, ISO 27001, SOC2, and PCI-DSS. I provide a high-level executive summary for stakeholders alongside deep-dive technical findings, fully reproducible Proofs-of-Concept (PoCs), and prioritized remediation steps to ensure your team can effectively close every gap before your audit. Specializing in black and gray box testing of live web applications, cloud environments, and networks, covering all common attack vectors, business logic flaws, and discovering previously undisclosed vulnerabilities (0days) to prevent high-impact data breaches. Service Description: 1) Web Application Penetration Testing (OWASP Top 10, PTES, ASVS, Business Logic Testing) 2) Mobile Application Penetration Testing (OWASP Top 10, MASVS, MASTG, PTES) 3) Network Penetration Testing (Active Directory, Entra ID, Internal & External Network) 4) API Security Testing - REST, GraphQL, SOAP, gRPC, Webhooks (OWASP API Top 10) 5) Cloud Security Testing - AWS/Azure/GCP/OCI/Alibaba/IBM/DigitalOcean/SaaS/IaaS/PaaS 6) Cloud-Native & Container Security (Kubernetes, Docker, OpenShift, EKS/AKS/GKE) 7) LLM Security Testing (OWASP LLM Top 10, Prompt Injection, Data Poisoning) Tools used in engagements: BurpSuite Professional | Custom Python scripts | BloodHound | Impacket Framework | Responder | Metasploit | Mimikatz | Nuclei | Nmap | FRIDA | Android Studio | Pacu | Prowler | Postman Identify and secure your attack surface before threat actors do ! Message me to discuss your project requirements.

OSCP & CREST-certified Penetration Tester helping SaaS companies, startups, e-commerce platforms, and enterprise teams find real, exploitable security weaknesses before attackers do. I provide manual-first penetration testing for Web Applications, APIs, Mobile Apps, Networks, Active Directory environments, Infrastructure, and Thick Client/Desktop Applications. My focus is not just finding vulnerabilities, but validating real-world exploitability, explaining business impact, and giving your developers clear remediation guidance they can actually apply. 🔎 Core services I provide: • Web Application Penetration Testing • API Security Testing • Mobile Application Penetration Testing for Android and iOS • External Network Penetration Testing • Internal Network & Active Directory Security Assessment • Thick Client / Windows Desktop Application Testing • OWASP Top 10 & OWASP WSTG-Based Security Testing • Vulnerability Assessment & Manual Validation • OSINT & External Attack Surface Assessment • Security Retesting & Remediation Validation • SOC 2, ISO 27001, PCI DSS, Amazon SP-API, and compliance-oriented pentest reports 📄 What you receive: • A professional penetration testing report • Clear proof-of-concept evidence and screenshots • Technical explanation of each vulnerability • Business impact written in simple, practical language • Severity rating and CVSS scoring where applicable • Step-by-step remediation guidance for developers • Retest results after your team applies fixes • Executive summary suitable for management, compliance, vendor review, and internal audit ⚡ My testing approach: I perform Black Box and Grey Box penetration testing depending on your project requirements. I use a manual-first methodology supported by professional tools such as Burp Suite Pro, but I do not rely only on automated scanners. The goal is to identify security issues that matter in real attack scenarios, including authentication flaws, authorization bypasses, SQL Injection, IDOR, access control issues, business logic vulnerabilities, API security weaknesses, injection flaws, misconfigurations, and sensitive data exposure. 🎯 Best fit if you need: • A security test before launching a product or major feature • A web application, API, mobile app, network, or infrastructure assessment • A compliance-ready report for SOC 2, ISO 27001, PCI DSS, vendor review, or investor due diligence • Manual security testing focused on real exploitability • Clear communication with practical remediation advice • Reliable retesting after fixes are completed 🏆 Certifications and experience: • OSCP • OSEP • OSWP • CREST CPSA • Top Rated in Information Security / IT Compliance • Ranked in the Top 50 in multiple bug bounty programs • Completed 500+ penetration tests and security assessments • Available across different time zones • Open to one-time assessments and long-term security engagements ✅ Need a professional penetration test or vulnerability assessment for your web application, API, mobile app, network, or infrastructure? 📩 Send me a message, and I will help you define the right scope, testing approach, timeline, and deliverables for your security goals.

Ex-Amazon and ex-Accenture offensive security engineer. I go beyond automated scans to identify and exploit real-world vulnerabilities in production systems. I hold top-tier industry certifications including OSCE³, OSEP, OSED, OSWE, OSCP, CRTO, CRTE, and GPEN - among the most advanced credentials in the offensive security space. I focus on identifying real-world vulnerabilities in web applications, APIs, and cloud environments, going beyond automated tools to uncover issues that have actual impact. My work is centered around: • Authentication and session management flaws • Authorization issues (horizontal/vertical privilege escalation) • Business logic vulnerabilities • Injection vectors and input handling weaknesses I approach every assessment as an attacker would - manually testing the application to identify realistic attack paths and chaining vulnerabilities where possible. Each engagement includes clear and actionable deliverables: • Detailed findings with proof of concept • Realistic impact assessment • Practical remediation guidance • A professional report suitable for both technical teams and stakeholders I’ve worked with both startups and large-scale systems, and I’m comfortable operating in production environments when required. I also stay involved after the assessment, working with the team to re-test previously identified vulnerabilities and ensure they are properly resolved. Let’s discuss how I can help secure your business.

100% Job Success. 9,000+ hours. 100+ projects delivered. ISTQB certified. I break software two ways: automated testing finds the bugs, penetration testing finds the vulnerabilities. Teams across FinTech, HealthTech, eCommerce, and Aviation hire me to make sure their products don't break in production, don't leak user data, and don't buckle under traffic. Two services that usually require two separate hires: QA automation and penetration testing. QA & Test Automation. Playwright, Selenium, Cypress, Appium across web, mobile, and API layers. Page Object Model architecture, data-driven execution, BDD with Cucumber, parallel runs, and CI/CD integration through Jenkins or GitHub Actions. Reporting through Allure and Extent Reports. Built automation frameworks for VistaJet, CreditBook, Bykea, and Bluefin that cut regression cycles from days to hours while expanding coverage from UI to API to mobile. Penetration Testing & VAPT. OWASP Top 10 assessments using Burp Suite, ZAP, Nmap, SQLMap, Metasploit, and Kali Linux. Authentication flows, injection vectors, CSRF, SSRF, IDOR, privilege escalation, API security, and mobile app vulnerabilities. Completed VAPT engagements for Netwatch, Switch & Co., MeasuringU, and Premiumpymts. Compliance validation for HIPAA, PCI-DSS, and GDPR with full remediation support until you pass. Performance & Load Testing. JMeter, LoadRunner, BlazeMeter, and Locust for stress, spike, and endurance scenarios. I find the database queries, API bottlenecks, and memory leaks that will crash your app at 10x traffic before your users find them. The overlap matters. Your penetration tester understands your test framework. Your QA engineer thinks like an attacker. Security checks happen inside QA cycles, not as a separate phase. One hire, both skill sets, zero gaps between them. Message me your project details, tech stack, and what's keeping you up at night. Specific testing approach back to you within 4-8 hours.

👏𝐀𝐩𝐩𝐫𝐞𝐜𝐢𝐚𝐭𝐞𝐝 STEX is grateful for your significant contribution to the information security of the project and we recommend you as an IT security professional. Please continue your useful work and do not tire of making the Internet better! - 𝐎𝐥𝐚𝐟 𝐇𝐚𝐧𝐬𝐞𝐧 - 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐫 𝐨𝐧 𝐒𝐓𝐄𝐗 🙋‍♂️𝐀𝐛𝐨𝐮𝐭 𝐌𝐞 ✅ 8+ years of Industry Experience in Penetration Testing of Web, Mobile, API's, Cloud and network ✅ Experienced Security Professional; Trusted by Enterprises & Startups ✅ CEH (Practical) & CRTP Certified ✅ Identified 1000+ vulnerabilities in infrastructure and applications 🏆𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐚𝐜𝐡𝐢𝐞𝐯𝐞𝐦𝐞𝐧𝐭𝐬 ✅ Discoverer of CVE-2024-3121 ✅ Recognized by LinkedIn, Stex, GlobalSign other enterprise platforms 💡𝐖𝐡𝐲 𝐌𝐞? ✅Beyond Automated Testing - Unique in depth and manual RSER penetration testing methodology, beyond automated scans to reduce false positives. ✅ Collaborative Approach - Actively collaborate with your development team to help fix the vulnerabilities ✅Controlled Testing - Testing in a safe and controlled environment, aligned with OWASP TOP 10 and PTES Standards. ✅Professional Reporting - Clear, professional, technical and detailed reporting with evidence of exploitation and remediation guidance for each vulnerability. ✅Executive Summary Report - Unique high-level summary crafted for executives and investors, translating technical findings into business risks and actionable insights. ✅Pentest Letter of Attestation (LoPT) - A formal proof of testing confirming your system has undergone professional penetration testing. Ideal for clients, partners, or compliance verification. 🙌Let’s connect! I can show you how I deliver thorough, transparent testing, produce reports that meet industry standards, and work closely with your team to fix vulnerabilities efficiently.

𝐈 𝐡𝐞𝐥𝐩 𝐨𝐫𝐠𝐚𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧𝐬 𝐢𝐝𝐞𝐧𝐭𝐢𝐟𝐲 𝐯𝐮𝐥𝐧𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬, 𝐬𝐞𝐜𝐮𝐫𝐞 𝐢𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞, 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐬, 𝐜𝐨𝐧𝐝𝐮𝐜𝐭 𝐩𝐞𝐧𝐞𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐭𝐞𝐬𝐭𝐢𝐧𝐠, 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐩𝐨𝐬𝐭𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐦𝐞𝐞𝐭 𝐫𝐞𝐠𝐮𝐥𝐚𝐭𝐨𝐫𝐲 𝐜𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐚𝐥, 𝐡𝐚𝐧𝐝𝐬-𝐨𝐧 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞. As a 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, I have successfully delivered cybersecurity, compliance, risk assessment, security architecture, infrastructure security, and penetration testing projects for startups, SMBs, and growing organizations across multiple industries. My approach combines technical execution with security best practices to help clients reduce risk, protect critical assets, and build secure environments that support business growth. 𝐔𝐧𝐥𝐢𝐤𝐞 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐧𝐭𝐬 𝐰𝐡𝐨 𝐨𝐧𝐥𝐲 𝐩𝐫𝐨𝐯𝐢𝐝𝐞 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐚𝐭𝐢𝐨𝐧𝐬, 𝐈 𝐰𝐨𝐫𝐤 𝐡𝐚𝐧𝐝𝐬-𝐨𝐧 𝐭𝐡𝐫𝐨𝐮𝐠𝐡𝐨𝐮𝐭 𝐭𝐡𝐞 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐥𝐢𝐟𝐞𝐜𝐲𝐜𝐥𝐞—𝐟𝐫𝐨𝐦 𝐚𝐬𝐬𝐞𝐬𝐬𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐩𝐥𝐚𝐧𝐧𝐢𝐧𝐠 𝐭𝐨 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧, 𝐫𝐞𝐦𝐞𝐝𝐢𝐚𝐭𝐢𝐨𝐧, 𝐝𝐨𝐜𝐮𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧, 𝐭𝐞𝐬𝐭𝐢𝐧𝐠, 𝐚𝐧𝐝 𝐟𝐢𝐧𝐚𝐥 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐲. 𝐂𝐨𝐫𝐞 𝐀𝐫𝐞𝐚𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ✔ Information Security & Cybersecurity Management ✔ Security Architecture & Security Engineering ✔ Penetration Testing & Vulnerability Assessment ✔ Security Assessment, Testing & Remediation ✔ Risk Assessments & Information Security Audits ✔ Cloud Security & Infrastructure Security ✔ Network Security, Network Engineering & Hardening ✔ System Administration & Infrastructure Management ✔ User Identity Management & Access Control ✔ Incident Response Readiness & Threat Mitigation ✔ DevOps Engineering & Security Best Practices ✔ Security Policies, Procedures & Documentation ✔ OSINT & Digital Forensics 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: ✔ ISO 27001 ✔ SOC 2 ✔ PCI DSS ✔ NIST Cybersecurity Framework ✔ HIPAA ✔ GDPR ✔ CMMC 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: ✔ 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐟𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 𝐰𝐢𝐭𝐡 𝐩𝐫𝐨𝐯𝐞𝐧 𝐬𝐮𝐜𝐜𝐞𝐬𝐬 𝐢𝐧 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐜𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 ✔ Hands-on technical expertise with end-to-end project ownership ✔ Strong experience across cybersecurity, compliance, infrastructure, and security operations ✔ Practical, business-focused security solutions rather than generic recommendations ✔ Clear communication, reliability, and commitment to quality Whether you need penetration testing, vulnerability assessments, security architecture, compliance implementation, cloud security, network security, system administration, risk assessments, infrastructure hardening, or end-to-end cybersecurity support, I can help deliver secure, practical, and scalable solutions tailored to your requirements. 𝐋𝐞𝐭'𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐬𝐞𝐜𝐮𝐫𝐞 𝐚𝐧𝐝 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧 𝐲𝐨𝐮𝐫 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭.

I find the vulnerabilities in your web apps, APIs, and networks before attackers do, then hand your team a clear, reproducible penetration testing report they can act on. GXPN and GCIH certified. Top Rated on Upwork with 100% Job Success across web application, API, and network security engagements. No scanner dump and no jargon wall. Every finding comes with a severity rating (CVSS), working proof of concept, and a concrete fix your developers can ship. What I test: - Web application penetration testing (OWASP Top 10, PTES, NIST) - API security testing (REST, GraphQL, auth/OAuth, IDOR, broken access control) - SaaS and multi-tenant assessments (Supabase / Firebase data-isolation testing) - Network and external perimeter penetration testing - Source code / secure code review How I work: authorized testing only, on systems you own or have permission to test. Everything is documented over Upwork so you get a written record of every finding, not a verbal hand-wave. I retest after you patch to confirm the holes are actually closed. Credentials: GXPN (GIAC Advanced Penetration Tester & Exploit Researcher), GCIH (GIAC Certified Incident Handler), SANS CTF winner, and an active national/international CTF competitor (web, reverse, crypto, forensics). I also handle WordPress malware removal and incident response. See my Project Catalog for a fixed-price option.

I am a Certified Web Application Penetration Tester and Secure Full-Stack Developer with over 5+ years of hands-on experience in manual security testing and building resilient, attack-resistant applications. I specialize in identifying real-world vulnerabilities that automated scanners often miss and in delivering secure, production-ready solutions that protect organizations from modern cyber threats. 🔐 Web Application & API Security Testing I provide comprehensive manual penetration testing designed to uncover complex vulnerabilities and business-logic flaws. My testing methodology focuses on realistic attack scenarios and delivers clear, actionable remediation guidance. 🔍 Manual web application penetration testing 🔗 API security testing (REST, GraphQL, SOAP) 📌 OWASP Top 10 and SANS Top 25 vulnerability coverage 🔑 Authentication and session security testing (JWT, OAuth, privilege escalation) 💉 SQL injection, XSS, CSRF, and advanced exploitation techniques 📄 Compliance-ready reporting aligned with PCI DSS, HIPAA, and GDPR, including executive summaries 💻 Secure Full-Stack Development In addition to offensive security testing, I build security-first applications designed to withstand attacks throughout their lifecycle. 🧩 Secure full-stack development using Django and MERN/MEAN stacks 🔐 Secure API design with input validation, rate limiting, and OAuth 2.0 ⚙️ DevSecOps integration with CI/CD pipelines and automated security testing (SAST/DAST) ☁️ Cloud security hardening on AWS and Azure using zero-trust architecture 🛠️ Vulnerability remediation and secure code refactoring 🛡️ Additional Security Expertise 📊 SOC operations and monitoring using Wazuh, Splunk, and the ELK Stack 🌐 Network and cloud penetration testing 🧬 Malware analysis and digital forensics 🤖 AI-powered threat detection integration 🔧 Tools & Technologies Security Tools: Burp Suite Pro, OWASP ZAP, Metasploit, Nessus, SQLMap, Wireshark Development: Python, JavaScript (Node.js, React), C/C++, Bash Platforms: Kali Linux, Ubuntu, Docker, Jenkins, GitHub Actions 🤝 Why Work With Me I prioritize clear communication, fast turnaround times, and practical results. Clients receive detailed technical reports, proof-of-concept demonstrations, and step-by-step remediation guidance. I also offer unlimited retesting and real-time collaboration to ensure all identified vulnerabilities are fully resolved. My approach combines offensive security expertise with secure development practices, protecting your applications from design through deployment.

Hello, I am a Security Professional and Red Team member with strong hands-on experience in penetration testing, vulnerability management, and web infrastructure security, focused on real-world attack scenarios and business impact. I have worked performing penetration tests across company assets, vulnerability analysis, and security assessments, always with an attacker mindset and a consultant-level reporting approach. In addition, I bring 10 years of experience in hosting environments, working directly with Linux servers and web infrastructure, with a strong emphasis on web security and incident response, including: Malware identification and removal (site cleanup) Investigation of compromised websites to determine how the attack occurred Identification of weaknesses in web systems and hosting configurations Hardening of servers, CMS platforms, and applications Solving complex issues related to shared, VPS, and dedicated hosting environments I am also a WordPress security expert, with extensive experience securing, cleaning, and hardening WordPress websites after real-world attacks, not just theoretical vulnerabilities. My technical experience includes: Web Application Pentesting (OWASP Top 10, auth flaws, file upload issues, RCE, LFI/RFI, SQLi, XSS) Active Directory and internal security assessments Red Team operations and attack simulation Linux servers, hosting infrastructure, and web stacks Clear technical and executive reporting with actionable remediation steps What you can expect from me: Practical, real-world security approach Clear communication and transparency Evidence-based findings (PoCs when applicable) Actionable recommendations, not generic advice If you are looking for someone who understands how attackers think, how websites actually get hacked, and how to fix and prevent it, I would be glad to discuss your project. Best regards, Andre Olivato Red Team | Pentest | Web & Infrastructure Security