Red-team engagement against a fintech app

The client is a UK fintech days away from launching a consumer app that would hold customer money. For a young brand, a post-launch security incident is not just costly: it can be fatal to trust and to the business.

They needed genuine assurance, not a checklist tick, that an attacker could not reach customer funds before they went live.

Days from launch, the fintech needed to know an attacker could not reach customer money, not hope so. The margin for error at launch was zero.

A checklist scan would tick boxes without answering the question that actually mattered: could someone chain small weaknesses into a real path to funds? Compliance-style testing would have given false comfort.

With regulators and early customers watching, a post-launch incident would have been existential for a young brand. The stakes made a superficial test worse than none.

We ran a goal-based red-team across the app, API, and backend, working towards a concrete objective the way a real attacker would rather than enumerating isolated findings. Chasing a real goal is what surfaces the paths that matter.

We chained weaknesses together, showing how a minor disclosure plus a permissive endpoint became a route to account takeover. Demonstrating the full chain is far more convincing, and more useful, than a list of isolated issues.

Each path came with a clear reproduction and a prioritised fix, and after the team remediated, we re-tested to confirm every fix held under the same attack. The launch cleared with the real routes to funds closed.