Application Security Testing Services | Web App & API Security
Software Testing (QA)

Find Security Weaknesses Before Someone Else Does

We test your web applications and APIs for common security weaknesses, rank what we find by risk and fix it with you. This is application security testing built into how we engineer software, not a compliance audit.

Core stackPlaywright · Selenium · Postman · Apache JMeter · OWASP ZAP · SonarQube · Azure DevOps · GitHub Actions

Is This You?

When Security Testing Is Overdue

Security testing usually starts with a customer question or a quiet worry.

Application security testing, not a formal audit.

We do not offer certified penetration testing or compliance audits. If you need one of those, we will tell you up front.

  • The app handles customer or payment data

    Personal details, logins or payments pass through your application and a breach would cost you customers.

  • A client or partner has asked about your security

    A security questionnaire arrived and you are not sure how the app would hold up.

  • Nobody has reviewed security since launch

    The app has grown for years and nobody has checked whether new features opened new gaps.

  • Your APIs now serve partners or mobile apps

    More clients call your APIs than at launch and nobody has tested who can reach what.

What We Build

Six Parts of Application Security Testing

Pick one to see what it usually involves and how we typically build it.

For the most common risks

Checks against the OWASP Top 10

Testing your application for the weaknesses most often exploited in web apps, such as broken access control, injection and weak authentication.

Typical examples
  • Access control checks
  • Injection and input handling
  • Authentication and session checks
Discuss a project like this

For broad coverage

Automated scanning

Scanning the running application for known weaknesses and misconfigurations, then confirming the findings by hand.

Typical examples
  • Signed-in and public scans
  • Configuration and header checks
  • Manual confirmation of findings
Often built with
  • OWASP ZAP
Discuss a project like this

For problems in the source

Code analysis

Reviewing source code for insecure patterns before it reaches production.

Typical examples
  • Insecure code patterns
  • Secrets left in code
  • Checks on every build
Often built with
  • SonarQube
Discuss a project like this

For the services behind your apps

API security testing

Testing APIs for missing authorization, data exposure and weak input handling, including the ones used by mobile apps and partners.

Typical examples
  • Authorization by role
  • Data exposure checks
  • Input validation tests
Often built with
  • Postman
  • OWASP ZAP
Discuss a project like this

For knowing where to start

Prioritized fix guidance

Every finding is ranked by risk and effort, with plain-language guidance your developers can act on.

Typical examples
  • Risk-ranked findings
  • Fix guidance per issue
  • Quick wins marked separately
Discuss a project like this

For closing the gaps

Fixing and retesting

Our engineers fix the issues or support your developers through them, then retest to confirm each one is closed.

Typical examples
  • Fixes in code and configuration
  • Retest of each finding
  • Updated findings report
Often built with
  • OWASP ZAP
  • SonarQube
Discuss a project like this
Approach

Highest Risk First. Everything Else Second.

Every engagement follows the same problem-first Systems Engineering Method we use across AppPotter.

  1. Agree the scope

    We agree which applications, APIs and environments are in scope and how testing will run.

  2. Scan and analyze

    Automated scans and code analysis cover the application broadly.

  3. Test by hand

    Testers check access control, authentication and business logic that scanners miss.

  4. Rank the findings

    Each issue is confirmed and ranked by risk and the effort to fix it.

  5. Fix with you

    Our engineers fix the issues or support your developers through them.

  6. Retest and report

    Every fix is retested and you get an updated report showing what was closed.

Outcomes

What Changes When Weaknesses Are Found First

We agree on what to measure during discovery, so success is defined before the build starts, not after launch.

  • Before: No idea how the app would hold up

    After: Known weaknesses found and ranked by risk

  • Before: Scanner reports full of noise

    After: Confirmed findings with clear fix guidance

  • Before: Security last checked at launch

    After: Code analysis that runs on every build

  • Before: Unsure how to answer a security questionnaire

    After: An accurate picture of where the application stands

  • Before: Findings reported and left open

    After: Issues fixed and retested

Technology

Chosen for Your Systems, Not Our Preferences

We test against the OWASP Top 10, with OWASP ZAP for scanning, SonarQube for code analysis and Postman for API checks. Findings are confirmed by hand before they reach your report.

Core stack

Where we have the deepest production experience

  • PlaywrightUI automation
  • SeleniumUI automation
  • PostmanAPI testing
  • Apache JMeterPerformance
  • OWASP ZAPSecurity
  • SonarQubeCode quality
  • Azure DevOpsCI/CD
  • GitHub ActionsCI/CD

Also used when the project calls for it

Unit testing
  • xUnit
  • NUnit
Performance
  • k6
Who You Work With

Senior Engineers, Directly Involved

  • Founder-led delivery

    Parth and Umesh are personally involved in every engagement.

    From scoping the work to standing behind its outcome, backed by Parth's 14+ years of enterprise technology and delivery experience.

    Meet our leadership
  • Current engagement · under NDA

    A long-term software engagement with a US-based technology company.

    Client identity and project details are undisclosed due to confidentiality obligations. We treat your work the same way.

    See our approach
Engagement

Ways to Work Together

  • Advisory & Discovery

    Short-term Strategy Engagements

    For a focused, short-term engagement - an assessment, an architecture review, or technical due diligence - before any build begins.

    • Comprehensive architecture reviews
    • Due Diligence of your tech stack
    • Roadmap and Estimation
  • Fixed Price

    Fixed Cost Model

    For clearly-scoped integration or build work, where the outcome and boundaries are already well defined.

    • Change Management process
    • Milestone-based delivery
    • Quality & SLA Commitments
  • Dedicated Team

    Dedicated Product Engineering Team

    For long-term product or systems work - a sustained AppPotter engineering team working against your roadmap, not rotated project to project.

    • Seamless onboarding and roadmap planning
    • Fixed Monthly Retainer
    • PO/Tech-lead Collaborations
Parth JotangiyaUmesh Sohaliya

Whichever structure fits, Parth and Umesh are personally involved, from scoping the engagement to standing behind its outcome.

Meet our leadership
Where This Fits

Part of Custom Engineering

We build custom only when an existing platform, integration or standard product can't solve the business problem.

Questions

Security Testing FAQs

Still unsure? A 30-minute conversation usually answers the rest.

Book a call

It is application security testing. We test your web apps and APIs for common weaknesses, including hands-on testing. We do not offer certified penetration testing or formal compliance audits.

Start with the scope

Tell Us What Your Application Handles

We'll look at your application and tell you honestly what security testing should cover.

Book a GTM Systems Assessment

30-minute call · No obligation · No sales pitch

Or send us a message

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We reply within 24–48 hours.