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Muhammad S.
$25/hr
100% Job Success
$200K+ earned
Offers consultations
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🔐 Helping Startups & Enterprises Eliminate Critical Security Risks—Before Hackers Exploit Them I’m a Certified Penetration Tester with 7+ years of offensive security experience. I specialize in securing web apps, mobile apps, APIs, and cloud infrastructure to help you prevent breaches, stay compliant, and protect your users. 🧰 My Security Expertise: Web App Pentesting – OWASP Top 10, SQLi, XSS, CSRF, SSRF, logic flaws Mobile App Security – iOS/Android reverse engineering, insecure storage, API exposures API & Cloud Security – REST, SOAP, GraphQL; AWS/Azure/GCP misconfigurations Manual Testing & Reporting – Clear, developer-friendly bug reports (JIRA, Trello, Agile teams) 🏆 Success Stories: ⚠️ Identified 50+ critical vulnerabilities in a fintech app, preventing a $500K breach 🔒 Secured 100+ applications used by 500K+ users, reducing risk by 80% post-audit 📄 Delivered 100+ penetration testing reports with prioritized, actionable fixes 📜 Certifications: 🛡️ OSCP – Offensive Security Certified Professional 🕵️ CEH – Certified Ethical Hacker 🔐 CompTIA Security+ 💡 Why Clients Choose Me: ✅ Actionable Reporting – Prioritized issues + clear developer guidance ⚡ Fast Turnaround – Critical bugs reported within 24 hours 🛡️ Confidential & Compliant – Full NDA, encrypted communications, secure tool usage 🌍 Trusted by – YC-backed startups, Fortune 500s, global security firms 🚀 Ready to Secure Your App? Click “Invite to Job” and get: ✅ A free 15-min consultation ✅ A sample penetration testing report ✅ Critical issues reported in just 24 hours
Muhammad S. has worked .
Motiventive
Associated with
Motiventive
$100K+
earned
Oleksandr F.
$35/hr
100% Job Success
$30K+ earned
Available now
Offers consultations
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⭐️⭐⭐️⭐️⭐️Most penetration testers give you 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐬𝐜𝐚𝐧𝐧𝐞𝐫 𝐫𝐞𝐩𝐨𝐫𝐭𝐬 𝐟𝐢𝐥𝐥𝐞𝐝 𝐰𝐢𝐭𝐡 𝐧𝐨𝐢𝐬𝐞. I deliver 𝐫𝐞𝐚𝐥, 𝐞𝐱𝐩𝐥𝐨𝐢𝐭𝐚𝐛𝐥𝐞 𝐯𝐮𝐥𝐧𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬 with 𝐜𝐫𝐲𝐬𝐭𝐚𝐥-𝐜𝐥𝐞𝐚𝐫 𝐏𝐫𝐨𝐨𝐟 𝐨𝐟 𝐂𝐨𝐧𝐜𝐞𝐩𝐭𝐬 and 𝐬𝐭𝐞𝐩-𝐛𝐲-𝐬𝐭𝐞𝐩 𝐫𝐞𝐦𝐞𝐝𝐢𝐚𝐭𝐢𝐨𝐧 𝐠𝐮𝐢𝐝𝐚𝐧𝐜𝐞 - the exact flaws attackers would use to break your system. 𝐈’𝐦 𝐧𝐞𝐰 𝐭𝐨 𝐔𝐩𝐰𝐨𝐫𝐤 ⭐️𝐛𝐮𝐭 𝐚𝐬 𝐚 𝐂𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐄𝐱𝐩𝐞𝐫𝐭⭐️𝐏𝐞𝐧𝐞𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐓𝐞𝐬𝐭𝐞𝐫 𝐰𝐢𝐭𝐡 𝟏2+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐚𝐥 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞⭐️ 💡 Why Me 🌍 ✔ 660+ clients in 36 countries, 12+ years experience 🛡️ ✔ Findings that prevent breaches & support compliance 👨‍💻 ✔ Developer-friendly remediation & free retesting 🔄 ✔ ~80% repeat clients I am a Senior Penetration Tester & Security Consultant with more than 12 years of practical cybersecurity experience. Over this time, I have successfully delivered 660+ projects in 36 countries and built long-term partnerships with companies of all sizes - from early-stage startups to enterprise-level organizations. My clients trust me because I don’t just list vulnerabilities: I make sure they are fixed, retested, and completely closed. This is why I maintain an exceptional ~80% client return rate. I’ve helped organizations in FinTech, e-Commerce, Healthcare, SaaS, Blockchain, and Government industries protect sensitive data, meet compliance requirements, and maintain customer trust. My security assessments have directly prevented breaches, helped companies secure investments, and supported successful audit certifications such as SOC2, HIPAA, and ISO27001 readiness. 🛡️ My Core Expertise I provide a full spectrum of offensive and defensive security services: 🔹 Web Application Penetration Testing Manual and automated testing for vulnerabilities like SQL Injection, Cross-Site Scripting (XSS), Cross-Site Request Forgery (CSRF), Remote Code Execution (RCE), Insecure Direct Object Reference (IDOR), Local/Remote File Inclusion (LFI/RFI), authentication & authorization flaws, business logic vulnerabilities, and misconfigurations. 🔹 Mobile Application Security (Android & iOS) Reverse engineering, static and dynamic analysis, testing data storage protections, API communication security, and exploitation of insecure permissions or misconfigurations. 🔹 Cloud Security Assessments (AWS, Azure, GCP) IAM misconfigurations, insecure storage buckets, weak API protections, Kubernetes & container orchestration security, serverless architecture hardening, and compliance readiness. 🔹 Smart Contract Security Audits (Solidity / EVM) Analysis of reentrancy issues, integer overflow/underflow, unchecked external calls, logic vulnerabilities, and economic flaws that could lead to devastating exploits. 🔹 Infrastructure & Network Penetration Testing External and internal testing for weak services, open ports, privilege escalation, VPN & firewall bypasses, and lateral movement simulation. 🔹 Code Review (SAST/DAST + manual) Deep review of source code to detect insecure coding practices and logic errors before they reach production. 🔹 Incident Response & Forensics Rapid response to active breaches, malware analysis, and post-incident hardening to prevent recurrence. ✅ Results I Deliver - When you work with me, you don’t just get a report - you get tangible outcomes: - Actionable PoCs → Every vulnerability is proven with working exploits, screenshots, and technical detail. - Prioritized Remediation → I rank vulnerabilities by real-world risk and business impact so your team knows what to fix first. - Executive Summaries → Easy-to-understand reports for stakeholders, investors, or compliance auditors. - Free Retesting → After you fix issues, I verify that vulnerabilities are fully patched. - Reduced Risk Exposure → My clients have prevented multi-million-dollar losses by patching critical flaws I discovered. 🏆 Track Record 1. Helped a FinTech startup secure $20M funding by fixing AWS & web flaws pre-SOC2 audit. 2. Discovered and patched critical smart contract bugs before launch. 3. Enabled a healthcare SaaS to pass HIPAA by closing PHI exposures. 4. Cut remediation time by 40% with clear PoCs & prioritized fixes. 5. Prevented severe breaches for an e-commerce platform during peak sales. ⚙️ How I Work 1️⃣ Scope & NDA → goals & rules 2️⃣ Recon → OSINT, surface mapping 3️⃣ Exploitation → manual + automation 4️⃣ Reporting → PoCs + executive summary 5️⃣ Retesting → free verification 6️⃣ Guidance → long-term security 🧰 Tools & Skills Burp Suite, Nmap, Metasploit, Wireshark, OWASP ZAP, custom scripts | OWASP, PTES, MITRE ATT&CK | OSCP, CEH, CompTIA Security+, CISSP-level expertise. ✨ Final Note I don’t just scan - I prove, fix, and retest vulnerabilities until closure. 🚀 Let’s secure your app, cloud, or smart contract today. Send me your scope for a tailored plan within hours. 💬 Cybersecurity Expert Cybersecurity Expert Cybersecurity
Oleksandr F. has worked .
DATAMI CYBERSECURITY TEAM - penetration testing, code review, protection 24/7, anti DDoS, reverse engineering
Associated with
DATAMI CYBERSECURITY TEAM - penetration testing, code review, protection 24/7, anti DDoS, reverse engineering
$6K+
earned
MD HASANUR R.
$15/hr
100% Job Success
$6K+ earned
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CEH ( Certified Ethical Hacker). I am a Professional Ethical Hacker and Expert in Penetration testing and Website Security and Network Scanning I have 5+ experience in projects ranging from, Bug hunting, penetration testing, network Testing, Website Security, analysis, vulnerability assessment, and testing to investigative and forensic work. I bring high standards and tried and tested methodology with manual bug Hunting and techniques to deliver you professional results. ✅Professional at Bug Bounty Hunting ✅Professional at Penetration Testing ✅System Hacking ✅Network Scanning ✅Professional at API Testing ✅Professional at Android and IOS Penetration Testing ✅Professional in Security Testing ✅Professional at Web Application Security ✅Professional at Vulnerability Assessment ✅Professional at Network Penetration Testing ✅Professional at Hacked site Recover ✅ Professional at Malware Removal/Virus Removal ✅ Website Testing part manually = Brute Force Attack = Unauthorized access to card = Business logic flaws allow the unauthorized transfer of funds = Unauthorized access to customer data = Unauthorized access to the example.com website = Authentication related issues = Authorization related issues = Data Exposure = Smuggling Testing = Bypass Rate Limit Protection = Bypass Authentication = Broken Access Control = Information Disclosure = Remote Code Execution (RCE) = Server-Side Request Forgery (SSRF) = Subdomain Takeover = Account Takeover = Code Execution = Content Discovery = Cross-Site Request Forgery (CSRF) = SQL Injection (SQLI) = HTML Injection / Content Injection = Cross-Site Scripting (XSS) = Command Injection = Local File Inclusion (LFI) = Insecure Direct Object Reference (IDOR) = XML External Entity (XXE) = Remote File Inclusion (RFI) = URL Redirection ✅System Testing 1. Password Cracking 2. Privilege Escalation 3. Malware Analysis 4. System Exploitation 5. Post Exploitation 6. Social Engineering 7. Network Sniffing 8. Denial of Service (DoS) Attacks 9. Security Misconfigurations 10. Vulnerability Scanning and Exploitation 12. Exploit Development ✅ Network Scanning Network Scanning List 1. Network Discovery 2. Port Scanning 3. Vulnerability Scanning 4. Service Version Detection 5. Network Mapping 6. Network Protocol Analysis 7. Wireless Network Scanning 8. SNMP Scanning 9. DNS Enumeration: 10. Network Performance Testing 11. Firewall and IDS/IPS Evasion 12. IoT and SCADA Network Scanning: 13. Cloud Network Scanning ✅ Penetration Testing Tools: = Metasploit = BurpSuite Professional = Nessus Professional = Acunetix Proffessional = Nuclei = Nmap = FFUF = Gau = Waybackurls = SQLMAP = wpscan = OWASP ZAP, etc. Terms of Services: • 100% Customer Satisfaction • Guaranteed Refund if not satisfied
MD HASANUR R. has worked .
Abdul W.
$10/hr
100% Job Success
$10K+ earned
Offers consultations
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As an experienced Cybersecurity Professional, my expertise encompasses Penetration Testing, Vulnerability Scanning, Information Security Management, and Compliance Oversight. With a comprehensive background, I provide multifaceted skills for effective digital asset protection in the dynamic cybersecurity landscape. In Cybersecurity Assessment, I excel in Threat Identification and Mitigation, adept in using tools like Burp Suite, Metasploit, OWASP ZAP, Nessus, and Nmap. My proficiency extends to Google CASA Tier 2 assessments, where I specialize in both dynamic and static scanning, leveraging OWASP ZAP and Fluid Attacks for robust evaluations. This expertise complements my in-depth understanding of Network Protocols, Firewall Configuration, and Database Management, and experience in various Operating Systems. My programming skills in Python, Perl, Ruby, and Bash Scripting enable the development of custom security tools, automating Penetration Testing and Vulnerability Assessment processes. These abilities, coupled with my analytical problem-solving skills, empower me to anticipate and counter Cyber Attacks effectively. In Web Application Security, I combine knowledge of Web Development and Penetration Testing for comprehensive Application Security Assessments. As an OSINT Specialist, I utilize public data sources for enhanced Risk Assessments and Threat Modeling. My role as a Chief Information Security Officer (CISO) and Compliance Officer underlines my commitment to Information Security Policies and regulatory standards adherence. Dedicated to professional growth, I continuously engage with the latest Cybersecurity Trends and technologies through Industry Conferences and Professional Development Courses. My extensive skill set is geared towards providing effective Risk Mitigation Strategies, ensuring the security and integrity of digital assets.
Abdul W. has worked .
Mostafa A.
$50/hr
100% Job Success
Offers consultations
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✅ Top Rated Expert ✅ Senior Penetration Tester ✅ Digital Forensics ✅ Cyber Investigation I help companies and individuals secure their systems with proven cybersecurity expertise. I'm a cybersecurity expert and Information Security projects manager and founder at XEye Security, I have more than 13 years of work experience including Penetration Testing, Digital Forensics, and OSINT, and I am also a Top-Rated freelancer on Upwork with a 100% Job Success Score. ⇨ Certificates we hold: CEH, OSCP, OSCP+, CRTP, OSEP, eMAPT, CRTE, GCIA, GCIH, SSCP, GRISC, CISA, CCSP, CompTIA Security+, and CompTIA Pentest+. Together with my teams from XEye Security, we will provide you the following services with highest quality and best results: • Penetration Testing (Manual and Automated) to identify and fix vulnerabilities with high quality official report from XEye Security and in compliance with all security standards. • Digital Forensics and Cyber Investigations to uncover the hidden attacks, root cause, the evidence and we will support you in legal proceedings. • Cyber Intelligence and OSINT (Open-Source Intelligence) to reveal information about intruders or cyber criminals who committed any blackmail or cybercrime against you. we will collect and reveal evidence, detect threats and also data breaches. • Reputation Management to protect, repair, and enhance your business online digital image. • Dark Web Monitoring and Investigation to detect and find all breached data. • Social Media Accounts Recovery, we recover lost social media accounts as far as it belongs to you. • Email Security and Reputation Enhancement to protect your emails and domains from all kinds of cyber threats and ensuring that your emails not marked as spam. • Information Security Compliance Consulting, Audits for SOC 2, ISO 27001, and ISO 27701. At XEye Security, we have worked with renowned enterprises and small and medium sized companies around the US, the EU, the MENA, and South Africa and we have provided high-quality services, and solutions allowing our clients to stay secure and compliant. We have a sub company named XEye Academy, we provide private trainings with certified and skilled expert trainers for almost all cybersecurity majors with dedicated labs and support, and in partnership with PECB, we provide internationally recognized certification courses such as ISO/IEC 27001 Information Security Management, ISO/IEC 27002 Controls Implementation, ISO/IEC 31000 Risk Management, and specialized Cybersecurity Management programs including Cybersecurity Foundation and Lead Cybersecurity Manager. ⇨ Why choose XEye Security? • Proven expertise in all cybersecurity majors • Global reach with diverse industry experience • Affordable, accessible cybersecurity solutions and services • Client‑ready and high-quality standards • More than 97% client satisfaction rate • Your cybersecurity is our top priority Please reach out to me through Upwork, I and my team are happy to support you and provide you with the best services at any time.
Mostafa A. has worked .
XEye Security
Associated with
XEye Security
Angu H.
$35/hr
100% Job Success
Available now
Offers consultations
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I am a Registered Penetration Tester & Ethical Hacker holding OSCP, CRTP, CEH, and CISSP certifications. I design custom tools and scripts for penetration testing and work extensively with Kali Linux. I perform comprehensive manual testing using Burp Suite, Metasploit, Nmap, SQLMap, Wireshark, and industry-standard frameworks. I safely develop, test, and modify exploits based on target environments. I currently work as a full-time security consultant specializing in penetration testing and vulnerability assessment across web applications, APIs, cloud infrastructure, and mobile platforms. I help organizations identify real, exploitable security risks through black-box, grey-box, and white-box testing methodologies. I have proven experience identifying critical and high-risk vulnerabilities across banking, telecom, insurance, government, SaaS, healthcare, and EdTech platforms. My work has led to multiple zero-day discoveries and CVE records in widely used products, including SHAREit, Upwork Time Tracker, and Avast Anti Virus. I bring 6+ years of hands-on experience as an information security professional. I have led and executed hundreds of penetration tests, VAPT engagements, red team operations, and security audits. My experience spans large enterprises with thousands of assets as well as startups seeking strong security foundations. I have deep expertise in assessing network security, cloud infrastructure (AWS, Azure), API security, web application security, and mobile application penetration testing (iOS and Android) across modern technology stacks. Core Competencies: • Web & Application Security: OWASP Top 10, authentication & authorization, access control, session management, business logic flaws, IDOR/BOLA, injection vulnerabilities • API Security: GraphQL, REST, OWASP API Top 10, OAuth/OIDC, SSO/SAML, token misuse, microservices • Cloud & Infrastructure: AWS (IAM privilege escalation, EC2/EKS, Lambda, S3, VPC, CloudTrail/GuardDuty), Azure, container/Kubernetes security • Specialized: AI/LLM security, mobile app security, thick client, admin panel security • Network: Internal AD testing, external penetration testing, lateral movement Working with me, you receive: ★ Actionable Deliverables: Detailed penetration test reports with executive summaries, risk severity classification (Critical/High/Medium/Low), CVSS scoring, proof of concept (PoC) with screenshots and logs, clear remediation recommendations, and impact analysis ★ Comprehensive Manual Testing: Complete hands-on security assessment (not automated scans) with immediate notification of high-impact exploitable issues ★ Customized Approach: Tailored testing for compliance needs (HECVAT, HIPAA, FERPA, Amazon SP-API,GDPR ,SOC2 ,ISO27001 ,PCIDSS), third-party security reviews, or proactive security hardening ★ Clear Communication: Developer-friendly reports and direct collaboration with engineering teams and non-security stakeholders ★ Timely Delivery: Comprehensive reports delivered on time without compromising quality ★ Unlimited Retesting: Vulnerability retest and fix validation included ★ Critical Bug Discovery: Proven ability to identify attack chains often missed by automated pentests My Track Record: ✅ Top-rated in information security and IT compliance ✅ Saved clients tens of thousands by identifying critical vulnerabilities before attackers ✅ Ranked Top 50 at multiple bug bounty programs ✅ Multiple CVE discoveries and responsible disclosures ✅ Professional certifications: OSCP, CISSP, CEH, CRTP ✅ Experience across SaaS, healthcare, EdTech, e-commerce, fintech, and enterprise ✅ Supporting all time zones for immediate-start and ongoing engagements Report Deliverables Include: ► Executive Summary & Attestation Letter (for compliance documentation) ► Assessment Methodology & Scope ► Risk Severity Classification with CVSS scores ► Detailed Findings: CVSS score, technical description, proof of exploitation (screenshots, request samples, logs), reproduction steps, impact analysis, and fix-ready remediation recommendations ► Retest Report: Multiple validation rounds included My Expertise: ★ Web Application Penetration Testing (OWASP Top 10) ★ API Security Testing (REST, GraphQL, OWASP API Top 10) ★ Cloud Security Assessment (AWS, Azure - IAM, containers, serverless) ★ Mobile Application Penetration Testing (iOS, Android) ★ AI/LLM Security Testing ★ Internal Active Directory and External Network Penetration Testing ★ Vulnerability Assessment and Penetration Testing (VAPT) ★ Backend API and Microservices Security ★ Thick Client Penetration Testing ★ Security Audits for SaaS, Healthcare, EdTech, E-commerce ★ Third-Party Security Reviews and Compliance Testing ★ Production Environment Security Assessment ★ OSINT Assessment Sound like a fit? 🟢 Press '...' button and then 'Send Message' button in the top right-hand corner
Angu H. has worked .
Sandeep S.
$15/hr
100% Job Success
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Web Penetration Testing(OWASP Top 10 methodology) | Network Penetration testing | OWASP API Security | Mobile Vulnerability Assessment(iOS and Android) | Source Code Reviews(.Net, Java, PHP) | Vulnerability Assessment and Penetration Testing | SIEM team (Cloud(AWS and Azure) Security, File Integrity Monitoring and Event Monitoring, Endpoint Security and Encryption, Data Loss Prevention, Network Access Control, Threat Monitoring (Email Traffic and Malware Analysis), Privileged Access and Identity Management) Have 7+ years of experience in both black box and white box testing penetration testing. Perform VAPT (Vulnerability Assessment and Penetration Testing) services for web applications, networks, mobile; source code reviews; malware analysis; server hardening; and security analysis etc. Conduct penetration testing in a systematic approach. Follow the standard methodology of the industry like OWASP Testing Guide v4(OTGv4); SANS top 25; NIST SP 800-115; PCI DSS to perform penetration testing so that client can concentrate on their professions without worrying about security threats. Web Application Testing: Do web application penetration testing with the latest methodology like OWASP Top-10, SANS Top-25. Perform both manual and automated penetration testing for vulnerabilities like Injection flaws(such as SQL, NoSQL, OS, and LDAP injection etc),Broken Authentication, Sensitive Data Exposure,XML External Entities (XXE), Broken Access Control,Security Misconfiguration, Cross-site scripting(XSS), Insecure Deserialization, Using Components with Known Vulnerabilities,Insufficient Logging & Monitoring. Also, perform source code reviews for many technologies like Java, NET, PHP etc. Approach for Manual Web-Application Penetration Testing: Conduct manual testing with following controls: * Configuration and Deployment Management Testing * Identity Management Testing * Authentication Testing * Authorization Testing * Session Management Testing * Input Validation Testing * Testing for Error Handling * Testing for weak Cryptography * Business Logic Testing * Client Side Testing Tools that use for Automated Web Penetration Testing: Acunetix, Burp-Suite, Netsparker, Nexpose, Nikto, IBM AppScan, HP fortify, W3af etc. Network penetration testing: Provide both external and internal network Penetration Testing so that your Network Infrastructure is secured from the real world attacks. Do both manual and automated network penetration testing. Approach for Manual Network Penetration Testing: Manually check for IDS/IPS, Server, Networks switch, Network Router, VPN, Firewalls, Anti-virus, Password etc. Tools that use for automated network penetration testing: OpenVas, Wireshark, Nessus, Metasploit, Armitage, Scapy etc. Mobile Application Penetration Testing: Perform mobile applications application penetration testing with the latest OWASP methodology(MSTG). Performed both manual and automated penetration testing for vulnerabilities like Weak Server Side Controls, Insecure Data Storage, Insufficient Transport Layer Protection, Unintended Data Leakage, Poor Authorization and Authentication, Broken Cryptography, Client Side Injection, Security Decisions Via Untrusted Inputs, Improper Session Handling, Lack of Binary Protections. Tools: Burp-Suite, HP fortify, Dex2Jar, Apktool, framework-res.apk, iNalyzer. Source Code Reviews: Perform source code reviews for both front and back-end languages. Perform source code reviews standard methodology like OWASP top 10. Do manual and automated source code reviews for various web based security vulnerabilities like SQL injection, Cross site scripting (XSS), CSRF, RFI,LFI, Authentication bypass etc. Tools: CheckMarx, IBM Appscan source for analysis, Microfocus HP Fortify. Security Analysis and Server Hardening: Regularly check and maintain your systems, servers to ensure that they comply with the standards. Do hardening application checks the item automatically on a daily basis and monitors all critical networks and server components. We support various frameworks like CIS benchmarking for Desktops & Web Browsers, Mobile Devices, Network Devices, Servers – Operating Systems, Virtualization Platforms & Cloud etc. Social Engineering: Have experience in social engineering vectors: Vishing, Phishing, Smishing, Impersonation. Used the following social engineering cycle to conduct social engineering: Gather Information: Here Information gathered from company websites, social media and other publications. Plan Attack: Next step is outline how intends to execute the attack Acquire Tools: After planning, next include computer programs that an attacker will use when launching the attack. Attack: Exploit the weaknesses in the target system. Use acquired knowledge: Information gathered during the social engineering tactics is used in attacks such as password guessing. Tools: SET(Kali-Linux); GetGoPhish
Sandeep S. has worked .
Volodymyr Z.
$35/hr
100% Job Success
$100K+ earned
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I’m an eWPTX-certified Cybersecurity Consultant with a Bachelor’s degree in Cybersecurity and over 10 years of hands-on experience in application security, helping organisations identify vulnerabilities across web applications, mobile apps, APIs, cloud environments, and IoT/embedded systems. I help companies identify real vulnerabilities in their systems and understand how they can be exploited, not just theoretically, but in practice. My focus is on manual, attacker-driven testing aligned with OWASP Top 10 and beyond, with clear, actionable outcomes for your team. I’ve worked with SaaS platforms, multi-tenant systems, and applications handling sensitive data, including projects aligned with HIPAA and FDA requirements. What I can help you with: * Web and API penetration testing * Mobile application testing (iOS, Android) * Network penetration testing * Cloud and backend security assessments * IoT and embedded device penetration testing * Embedded systems security audits My approach: * Manual testing, not just automated scans * Focus on real attack paths and impact * Clear communication throughout the process What you get: * Professional report with severity (CVSS), evidence, and reproduction steps * Practical remediation guidance your developers can use * Executive summary for non-technical stakeholders Technologies and platforms I have experience with (including, but not limited to): * Frontend: React, Next.js, TypeScript, Tailwind CSS * Backend: Node.js, Express, FastAPI, Laravel (PHP) * Databases: PostgreSQL, Supabase, Firebase, MongoDB * Cloud & BaaS: AWS, Supabase, Firebase, Vercel, Cloudflare * APIs: REST, GraphQL, PostgREST * Auth & Security: JWT, OAuth, RBAC, Row Level Security (RLS) * Payments: Stripe (Checkout, webhooks, subscriptions) * Mobile: Android, iOS (dynamic analysis with Frida, Objection) * Embedded & IoT: Microcontrollers, device logic analysis, firmware interaction * DevOps & Infra: Docker, CI/CD pipelines, GitHub Actions * AI integrations: RAG-based systems, prompt injection testing, data leakage analysis I’m easy to work with, responsive, and focused on delivering results that actually improve your security.
Volodymyr Z. has worked .
Rafay B.
$100/hr
100% Job Success
Available now
Offers consultations
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I am a globally acclaimed Cyber security consultant and Internet Security Specialist with a proven track record in security engineering and discovering Critical Zero Day Security Issues in a significant number of Web Applications, Products and Browsers which have helped protecting Privacy and Security of millions of users globally. My research on Cyber Security has been featured in BBC, Forbes, WSJ, Tech Crunch and many International media outlets. My mission is to fortify your digital defenses by harnessing the power of cutting-edge AI/ML technologies. I currently hold the following educational degrees and certifications: ✅ Masters in Cyber-Security and Forensics ✅ Certified Information Systems Security Professional (CISSP) ✅ Certified Information Security Auditor (CISA) ✅ Offensive Security Certified Professional (OSCP) ✅ CREST Practitioner Security Analyst (CPSA) ✅ Offensive Security Web Expert (OSWE) ✅Offensive Security Wireless Professional (OSWP) Security/Compliance Frameworks: ISO 27001, SOC2, PCI-DSS, HIPAA, NY DFS 23/ NYCRR Part 500, NIST, CIS, GDPR, HIPAA, FedRAMP, NIST 800-53, NIST 800-171, NIS2, DORA Services I Offer: Penetration Testing Vulnerability Assessment PCI-DSS SAQ Filing + ASV PCI compliance assessment Cloud Security (AWS, Azure and GCP) Red Teaming Assessment Threat Modelling Security Architecture Review Web 3.0 Wallet Security Smart Contract Audits Cloudflare WAF Protection DDOS Protection Expert Bot Protection Expert
Rafay B. has worked .
Himani S.
$15/hr
95% Job Success
$300K+ earned
Available now
Offers consultations
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I help startups and growing businesses deliver high-quality web and mobile applications through comprehensive manual testing, detailed bug reporting, and user-focused quality assurance. What I Offer: ✅ End-to-End QA Testing ✔Functional Testing ✔Regression Testing ✔User Acceptance Testing (UAT) ✔Cross-Browser & Cross-Device Testing ✔UI/UX & User Journey Validation ✔Test Case Design & Execution ✔Defect Tracking & Reporting ✅ Technical Testing Expertise ✔Web Application Testing ✔Mobile App Testing (iOS & Android) ✔API Testing (Postman) ✔SaaS Platform Testing ✔FinTech Application Testing ✔AI Application & Workflow Testing ✔Compatibility & Workflow Validation ✅ Tools & Platforms ✔Jira, ClickUp, Trello, Asana, Notion ✔Postman ✔Selenium, Cypress ✔GitHub ✔Google Workspace ✔Industries Served ✔FinTech & Financial Services ✔SaaS Platforms ✔AI-Powered Applications ✔Healthcare & EdTech ✔E-Commerce & Shopify Why Clients Work With Me ✔ Strong experience testing complex web and mobile products ✔ Clear, actionable bug reports with detailed reproduction steps ✔ Deep understanding of Agile, SDLC, and STLC processes ✔ Focus on business workflows, usability, and release readiness ✔ Proven track record across long-term QA engagements I focus on identifying issues before they impact users, helping teams launch stable, reliable, and high-performing software with confidence. Let's discuss how I can help improve the quality of your product.
Himani S. has worked .