Node.js/Express Security Code Review

We need an independent application-security engineer to review one pull request in a private Node.js/Express backend (production payments marketplace). The change is small (six files: three source files with minor edits, plus two test scripts and a test-config line) and concerns authentication/authorization guards on two internal/admin routes. You will receive a hash-verified evidence packet (diffs, test output, specification) and a reviewer checklist. Scope: - Review the diff against the specification and checklist - Optionally re-run the test suite locally (Node.js; no live services needed) - Return a signed disposition: Approve / Approve with conditions / Reject, with brief rationale This is a review only. Please do not propose rewrites beyond what the checklist asks. Requirements: demonstrable experience reviewing Express middleware, JWT-based auth and role-based access control; no affiliation with our company. NDA required before any materials are shared. Estimated effort: 2-4 hours, fixed price. Deliverable: completed checklist and signed disposition.