Quality Engineering Domain
Executive Overview
Safeguard your enterprise applications and customer confidential data from modern cyber threats. Our certified ethical hackers (CEH, OSCP) perform comprehensive penetration testing, vulnerability assessments, and DevSecOps pipeline integration.
Security flaws rarely announce themselves during functional verification. A login flow, file upload or partner webhook can pass every acceptance criterion and still expose customer records if session tokens, role checks or input parsers behave unexpectedly under crafted requests. Our software security testing engagements examine how your application handles untrusted input, privilege boundaries and exposed interfaces before attackers or external auditors do.
Qaston is a software testing company based in Madurai, India, working remotely with engineering and security teams across India and international markets. We combine automated scanning in tools such as OWASP ZAP, Nessus, SonarQube, Snyk and Checkmarx with hands-on investigation in Burp Suite Professional, using public risk catalogs such as the OWASP Top 10 and SANS 25 as reference frameworks to structure coverage.
Every engagement runs strictly under written authorization, within agreed target boundaries and test windows. Whether you need a pre-launch vulnerability assessment, recurring application security testing services across sprints or a focused review of a high-risk workflow, we produce clear technical evidence and practical remediation notes for your developers.
Key Strategic Benefits
Core Deliverables & Work Products
Tools & Technology Matrix
Our certified engineers leverage industry-leading toolsets, open-source automation libraries, and proprietary accelerators:
What our application security testing services cover
Web application security testing
We inspect browser-facing applications for injection flaws, cross-site scripting, broken authentication, insecure session management, cross-site request forgery and misconfigured security headers. Using the OWASP Top 10 as a baseline reference, we also test multi-step business workflows such as checkout, password recovery and account privilege changes that automated crawlers often miss.
API security testing services
Single-page apps and partner integrations typically talk directly to REST or GraphQL backends. Our API security testing services check object-level and function-level authorization, token handling, rate limiting, mass assignment and payload validation, complementing the contract and functional checks in our API testing services.
Mobile application security testing
For Android and iOS clients we review insecure local storage, hardcoded secrets, certificate pinning behavior, inter-app communication and the API traffic the app generates. This pairs naturally with broader mobile app testing when you are preparing a build for store submission or enterprise distribution.
Static code analysis and dependency checks
Not every weakness is easiest to spot from the outside. Where source access is part of the scope, we use static analysis and software composition tools such as SonarQube, Checkmarx and Snyk to flag insecure coding patterns and vulnerable open-source libraries early in the build.
Vulnerability assessment and penetration testing (VAPT)
Vulnerability assessment services for broad discovery
A vulnerability assessment looks across the agreed scope to catalog known misconfigurations, outdated components, missing patches and common application weaknesses. We use scanners such as OWASP ZAP and Nessus alongside manual verification to filter out noise so your team is not buried under unverified scanner output.
Penetration testing services for real-world impact
Penetration testing goes deeper on selected targets. Within the rules of engagement you authorize, testers use Burp Suite Professional and manual techniques to see whether individual weaknesses can be chained together to bypass controls, access unauthorized data or escalate privileges, demonstrating practical business risk.
Business logic and access control review
Automated tools do not understand your pricing rules, tenant isolation model or approval chains. We test horizontal and vertical access controls across user roles, checking whether one tenant or role can view, modify or trigger actions belonging to another.
How an authorized security testing engagement works
Scoping, rules of engagement and authorization
Before a single request is sent, we document target URLs, IP ranges, test accounts, excluded systems, permitted techniques and emergency contacts. Testing starts only after written authorization is in place and a non-production or isolated environment is confirmed.
Threat modeling and reconnaissance
We map entry points, trust boundaries, authentication mechanisms and sensitive data flows. This step aligns the test plan with the assets that matter most to your business and avoids wasting effort on low-impact surfaces.
Scanning, manual verification and evidence capture
We combine DAST and SAST tooling with manual probing. Every candidate finding is verified to remove false positives, and we record reproduction steps, request and response logs, affected endpoints and severity ratings so developers can reproduce the issue quickly.
Reporting, developer walkthrough and retesting
You receive an executive summary for stakeholders and a detailed technical report with remediation guidance. Once your engineers apply fixes, we retest the affected areas to confirm the vulnerabilities are closed without introducing new regressions.
DevSecOps pipeline checks and security testing consulting
Embedding SAST, SCA and DAST into CI/CD
We help teams wire tools such as Snyk, SonarQube, Checkmarx and OWASP ZAP into build pipelines alongside test automation. By tuning rule sets and severity gates, pipelines flag high-priority issues on pull requests without blocking developers over minor warnings.
Enterprise security testing for complex landscapes
Enterprise applications rarely live in a single repository; they connect identity providers, ERP backends and cloud storage. We coordinate enterprise security testing across integrated environments and pair with cloud testing when infrastructure configuration is part of the risk picture.
Security testing consulting and readiness reviews
If your team is preparing for a customer security questionnaire or an external audit, our security testing consulting helps you decide what to test first, establish a vulnerability triage workflow and build repeatable secure testing habits inside your QA process.
Qaston 4-Phase Delivery Framework
Discovery & Architecture Audit
Evaluating application dependencies, defect history, test environments, and SLAs.
Framework Engineering & Design
Designing modular test suites, synthetic data pipelines, and CI/CD quality gates.
Continuous Automated Execution
Parallel execution across real devices, distributed cloud runners, and regression suites.
Analytics & Optimization
Real-time quality dashboards, defect root-cause analysis, and continuous feedback.
Plan an authorized security assessment with Qaston
Tell us about your web, mobile or API application and what you need to verify. We will help you define a clear, safe scope and testing plan.