Traditional penetration tests are often organised like an external acceptance check: hand over the scope, wait for several days, receive a report. This creates a clear boundary, but it also loses information. Testers have to infer product logic, developers only learn which assumptions were challenged at the end, and small questions turn into formal loops.
An alternative can suit active product teams. An external penetration tester works directly with product owners and developers for a limited period. The tester understands the upcoming change, can question domain risks early and still assesses the running application from an independent attacker perspective. This is neither a permanent development role nor a casual code review. It is development-oriented penetration testing with explicit boundaries.
As a freelance penetration tester, I can provide precisely this short connection. Its value does not come from attending every meeting. It comes from timely context, reproducible evidence and a direct route from an attack path to a robust fix.
What being embedded in the product team means
An external tester does not need to attend every daily meeting or receive access to every internal system. Being embedded primarily means not having to work blind at security-relevant points. That requires an accessible technical contact, understandable architecture information and a confidential channel for findings.
A practical setup can look like this:
- Agree on the objective, scope, environment and stop conditions at the start.
- The team explains roles, critical data and unusual business logic.
- The tester forms attack hypotheses and validates them independently.
- Critical findings are communicated immediately; others are grouped sensibly.
- Developers can ask clarifying questions without negotiating the result.
- Fixes are confirmed through regression tests followed by an independent retest.
Embedding shortens the information path. It must not reduce testing to known risks or cases preferred by the team. Part of the assessment time remains deliberately open for exploration, unexpected states and combinations that do not appear in tickets or architecture diagrams.
The right time is before the release bottleneck
Security becomes expensive when every important decision has already been made. If central authorisation logic is distributed across controllers, jobs and exports, a fundamental correction is difficult immediately before release. An early attack hypothesis can reveal which invariants the design needs to enforce. The actual penetration test remains essential because a plausible architecture does not prove a correct implementation.
A useful sequence contains three points of contact:
Risk discussion before implementation
This does not require a complete threat-modelling programme. In 30 to 60 minutes, the team can name the most important assets, roles and unacceptable outcomes. For example: “A user must never export data belonging to another tenant” or “Repeating a request must not trigger the same refund twice.” These statements give development and subsequent testing a shared reference.
Focused testing in a stable environment
Independent assessment starts once the workflow is fully usable. The tester receives defined roles and test data but deliberately tries to leave the intended paths. This goes beyond looking at individual endpoints. State transitions, indirect access through files or jobs and the ability of a weaker role to trigger stronger actions all matter.
Retesting before or after delivery
A retest does not merely repeat one HTTP request. It revisits the original attack path, obvious variants and potential side effects of the fix. For a time-critical release, the parties can also agree which residual risks prevent approval and which may transparently be addressed afterwards.
Keep responsibilities distinct
Proximity to the team must not dissolve independence. Three roles should remain visible: the product team owns requirements and implementation; the penetration tester owns hypotheses, evidence and technical assessment; and a named client representative decides on risk acceptance and release.
This separation prevents familiar misunderstandings. A developer can propose an alternative solution but cannot independently dismiss a reproducible attack because “nobody would notice it in practice”. The tester can describe technical impact but does not decide what the business accepts. A product owner can defer a finding deliberately, but then has to own that decision transparently.
Extra care is required when the external specialist also changes code. Remediation support can be valuable, but the author's own patch should not be the sole basis for declaring a finding fixed. At minimum, a reproducible regression test and a transparent second assessment of the attack path provide traceability.
Information that actually helps
A huge document repository rarely improves a penetration test. A small, current context pack is more useful:
- target systems and systems explicitly excluded,
- a role matrix with permitted core actions,
- test accounts for different permission levels,
- data flows to external services,
- particularly sensitive data and operations,
- known limitations of the test environment,
- and a contact and escalation route for critical findings.
Source access can improve depth when it fits the engagement. It does not make dynamic testing redundant. Code shows possible paths; the running system demonstrates how middleware, configuration, proxies, jobs and integrations actually interact. Combining the two perspectives creates the value.
For web applications, the OWASP Application Security Verification Standard offers a shared language for security requirements. It should be applied according to risk, not treated as a mechanical list expected to describe every domain-specific property of an application.
Communication without meeting overhead
Direct collaboration does not mean continuous interruption. A clear rhythm is normally sufficient. A kick-off confirms prerequisites. Short asynchronous questions use an agreed channel. Critical findings have a dedicated escalation route. An interim review is only needed if scope, reachability or risk changes materially.
Every early finding should already contain enough evidence to avoid ambiguity:
- affected function and role,
- necessary prerequisites,
- reproducible steps,
- observed technical impact,
- and an initial view of reach and urgency.
The complete report adds root cause, variants, remediation guidance and management context. The fast channel remains actionable without turning a loose collection of chat messages into the project's only deliverable.
What this model does not replace
An embedded tester is not an outsourced security department. The role does not automatically own asset inventory, patch management, monitoring, incident response or secure architecture. Those responsibilities may be important, but they need explicit owners.
A comprehensive independent assessment may still be appropriate. When many systems must be considered in parallel, multiple specialisms are required or formal obligations demand a larger delivery model, the work belongs with a team. DSecured is the separate company structure for those engagements. Personal freelance collaboration focuses on situations where direct product context and short technical paths create the greatest value.
A small starting format
Teams do not need to commit to a long-term model immediately. A bounded start might contain a risk discussion, two to five testing days for one relevant workflow and a retest window. The outcome reveals not only possible findings, but also whether access, communication and documentation work for both parties.
Four outcomes should be defined before the start:
- Which workflow or release is being assessed?
- Which roles and test data are available?
- How will critical and normal findings be delivered?
- Until when can a fix be retested?
The parties can then decide rationally whether further release checks, a larger penetration test or no continuing support is appropriate. The model remains a tool rather than becoming an end in itself.
Conclusion
Embedding a penetration tester in the product team can bring security feedback much closer to the technical decision. Success depends on clear responsibilities: context and communication are shared, testing remains independent and risk decisions stay with the client.
This works particularly well for custom web applications, APIs and Laravel systems with complex roles or business processes. If an upcoming release, critical workflow or new integration needs that perspective, we can narrow the context in a non-binding project discussion. DSecured remains the right route for broader, multidisciplinary assessments; I am personally available for direct work with the development team.