You will get a professional penetration testing and a comprehensive report.
Top Rated
Top Rated
Project details
I offer professional penetration testing that includes a comprehensive report detailing any vulnerabilities found and recommended fixes based on best practices. The testing is conducted by a highly experienced and certified professional (OSCP, OSEP) with a proven track record of completing over one hundred successful projects. They are also a leader of hacking teams in competitions, regularly keep up-to-date with the latest hacks and exploits, and have worked for top IT companies, consistently delivering exceptional results.
To ensure the best possible results, penetration testing is carried out mainly manually, leaving no stone unturned. Automated scanners are only used upon the client's request as they can be noisy, generate excessive traffic, and produce false positives.
To ensure the best possible results, penetration testing is carried out mainly manually, leaving no stone unturned. Automated scanners are only used upon the client's request as they can be noisy, generate excessive traffic, and produce false positives.
Cybersecurity Expertise
Data Protection, Audit, Risk AssessmentTechnology Type
Firewall, IaaS, Computer Network, Database, Operating System, SaaS, Web Application, CRM, Email System, Mobile DeviceCybersecurity Regulation
PCI DSSWhat's included
| Service Tiers |
Starter
$250
|
Standard
$350
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 4 days | 6 days | 8 days |
Small Company Size | |||
Medium Company Size | |||
Large Company Size |
Frequently asked questions
121 reviews
(117)
(2)
(0)
(1)
(1)
AR
Andreina R.
Feb 12, 2026
Very professional and knowledgeable! Pleasure to work with.
TV
Tetiana V.
Jun 11, 2026
Vulnerability, Penetration scans and CI/DI integration
AM
Ali M.
May 26, 2026
Security Pen Tester / OWASP Specialist to test web app
Steffin did a great job on our grey-box penetration test. He uncovered several high and critical severity vulnerabilities - including SQL injection and privilege escalation - that we may not have caught otherwise, backed by solid technical evidence. His written report was professional and well-organised, covering findings, risk scores, and specific remediation steps. He also came back for a retest once we'd made fixes, which gave us real confidence that the issues were properly resolved. Clear communicator throughout. Will work with him again.
MM
Massimo M.
May 15, 2026
Pen Test Specialist
TO
Taha O.
Apr 9, 2026
SOC2 Web Application Penetration Testing
Fantastic work by Steffin, who always stayed available and flexible. Top notch !
JR
Joel R.
Mar 1, 2026
Penetration Tester Needed for Platform Security
Steffin did a great job conducting our penetration testing plan.
About Steffin
Penetration Tester | Web, API & Application Security | OSCP, CREST
100%
Job Success
Kozhikode, India - 6:43 pm local time
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.
Steps for completing your project
After purchasing the project, send requirements so Steffin can start the project.
Delivery time starts when Steffin receives requirements from you.
Steffin works on your project following the steps below.
Revisions may occur after the delivery date.
Receive Scope requirements
Scope details include the Web application link or IP address
Provide Credentials for authenticated testing
Credentials are required if it has to be authenticated test