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
123 reviews
(119)
(2)
(0)
(1)
(1)
AR
Andreina R.
Feb 12, 2026
Very professional and knowledgeable! Pleasure to work with.
SJ
Shafiek J.
Aug 14, 2026
Senior Penetration Tester for Web Application & API Security Assessment
Steffin has performed exceptionally well documented work for us. He communicated clearly and set expectations from the beginning. His thoroughness and attention to detail is what stood out. He stick to the timelines and achieve his milestones.
TO
Taha O.
Jul 14, 2026
SOC2 Web Application Penetration Testing
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
About Steffin
Senior Web Application & API Penetration Tester | OSCP, OSEP, CREST
100%
Job Success
Kozhikode, India - 9:35 pm local time
I’m an OSCP, OSEP, OSWP and CREST CPSA-certified Penetration Tester with 100% Job Success, Top Rated status, 190+ completed Upwork engagements and experience delivering 400+ penetration tests and security assessments.
I help SaaS companies, startups, e-commerce platforms and enterprise teams identify real, exploitable security weaknesses before product launches, major releases and compliance reviews.
My approach is manual-first. I investigate vulnerabilities that automated scanners often miss, including authentication weaknesses, authorization bypasses, IDOR/BOLA, privilege escalation, tenant-isolation failures, business-logic flaws, race condition flaws and chained attack scenarios.
CORE SERVICES
• Web Application Penetration Testing
• API Security Testing
• Mobile Application Penetration Testing
• External and Internal Network Penetration Testing
• Active Directory and Infrastructure Assessments
• Thick Client Application Testing
• Security Retesting and Remediation Verification
WHAT YOU RECEIVE
• A professional executive and technical report
• Reproducible proof-of-concept evidence
• Risk ratings and CVSS scoring where applicable
• Clear business-impact explanations
• Developer-focused remediation guidance
• Retesting after fixes are implemented
Reports can support SOC 2, ISO 27001, PCI DSS, Amazon SP-API, vendor-security reviews and internal audits.
Redacted Web Application and API penetration-testing report samples are available upon request.
Send me your application type, number of user roles, approximate API endpoints or hosts, testing environment and preferred timeline. I will help you define the appropriate scope, methodology and deliverables.
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