Your app is live. Users are signing up. Payments are coming in. And you have no idea whether it's secure — because most serious web app vulnerabilities don't show symptoms. The app works normally right up until someone exploits it. I find what's exposed before someone else does.
Security isn't a feature you add. It's a set of properties your app either has or doesn't. Here's why most web apps — especially AI-built ones — are missing them.
Vibe coding tools are excellent at producing code that runs. They're not optimised for security. They frequently generate code with weak patterns — string-concatenated queries, secret keys in client code, incomplete permission checks — because those patterns still "work."
Buggy code announces itself — the screen goes white, the button doesn't work, the app crashes. Insecure code does not. It sits there silently, behaving correctly for honest users, until someone malicious arrives.
Even technically-minded founders struggle to spot security issues in code. The consequences of a leaked key or missing auth check aren't obvious until they're exploited — usually by someone else, usually at the worst possible time.
Every founder who has rushed to launch has committed a secret, skipped a permission check, or turned off rate limiting "just to test." Those decisions rarely get revisited — and often stay in production for years.
Every library your app depends on gets updated, and every update occasionally fixes a vulnerability. An app whose dependencies haven't been touched in a year is carrying every vulnerability published since.
Leaked keys trigger charges you didn't make. Exposed data leads to customer trust damage. Missing authorization lets users reach systems they shouldn't. All of it happens before the founder knows there's a problem.
These are the categories I review in every audit. They're the ones that appear most frequently in AI-built and rapidly-shipped apps — and the ones that cause the most serious damage.
API keys, database credentials, tokens and passwords checked in source code, frontend bundles, error messages or Git history.
Weak password handling, missing rate limiting, insecure session management, password reset flows that can be hijacked.
Endpoints that accept requests without verifying the user has permission. Frontend hides buttons; the API still responds.
SQL, NoSQL and command injection via string-concatenated queries and unvalidated input reaching system calls.
Missing or shallow validation letting malformed data reach your database, file system or downstream services.
Outdated libraries with known CVEs — some of which allow remote code execution on your server.
Missing security headers, exposed admin panels, permissive CORS, verbose error messages leaking internal structure.
Passwords stored without proper hashing, sensitive data in plaintext, backups and logs containing more than they should.
Why these eight? They map directly to the OWASP Top 10 — the industry-standard list of the most critical web application security risks. The audit uses that framework as its foundation, adapted to how Nigerian and African startups actually build and ship apps.
An audit isn't a vague "it looks fine." It's a written report you can act on, share with your team, and use to plan fixes.
Every issue found, categorised by severity (critical, high, medium, low), with a clear explanation of what the issue is and what could happen if it isn't fixed.
File paths, endpoint URLs, and code snippets so you know where to look. No vague "somewhere in the auth flow" — specific, actionable evidence.
A concrete suggestion for how to fix the issue, including the pattern or approach to use. You or your developer can act on it immediately.
Issues ordered by urgency. Critical findings — exposed keys, broken auth — first. Cosmetic improvements last. You know exactly what to fix this week versus this quarter.
Once you've applied fixes — either yourself or with me — each finding is retested to confirm it's genuinely resolved. Not assumed resolved; verified resolved.
If you'd prefer I fix the issues rather than just report them, remediation is available as a separate project. Same rigour, tested against your live application.
Structured, non-disruptive, and confidential. Your app is never taken offline during an audit.
A short conversation about your app — what it does, what data it handles, whether it takes payments, and who has access. You receive a clear scope and fixed fee before anything begins.
You give me read-only access to the codebase. An NDA is signed if you'd like. I never take write access unless you explicitly approve remediation later.
Full review of your source code against the eight categories — authentication, authorization, input handling, secrets, dependencies, server configuration and more. This is where the deepest findings come from.
Testing your running application from the outside — the way an attacker would. Includes checking for exposed endpoints, misconfigured headers, missing rate limits, and whether frontend-only restrictions can be bypassed by calling the API directly. No destructive tests, no load testing, no data modification.
A comprehensive written report with every finding, its severity, its location, and how to fix it. Delivered as a document you can share with your team, an investor, or your developer.
A call to walk through the findings and answer questions. After fixes are applied — by you or by me — each finding is retested to confirm it's genuinely resolved.
Security review requires someone who actually builds software — not someone who runs a scanner and calls it an audit.
React.js, Node.js, PostgreSQL, REST APIs. I audit codebases by understanding how they were built — not just running automated tools that miss context.
I build, ship and maintain real applications. I know what's under the hood of a working app — including the shortcuts that get taken when deadlines approach.
A large portion of my audit work is on AI-built and vibe-coded apps. I know exactly which patterns AI tools generate that create security problems — and where to look for them.
Since 2015. Running a business means I treat your data and your customer's data with the seriousness you'd expect — including strict confidentiality during the audit.
"He found an exposed secret key that had been sitting in our codebase for months. That finding alone was worth the audit."
"Our investors asked about security during due diligence. The audit report answered every question professionally. It made the whole conversation easier."
"I expected a generic scan with a hundred false positives. Instead I got a clear, prioritised list of real problems with exact fixes. Handed it to my developer and it was done in a week."
You can't know from the outside. Most serious web app vulnerabilities don't cause visible symptoms — the app keeps working normally until someone exploits it. The only reliable way is a code-level security audit that reviews authentication, authorization, input handling, secret storage, dependency versions and server configuration. Anything less is guessing.
The most common issues include: API keys and database credentials hardcoded in source files and committed to Git, no rate limiting on login or password reset endpoints, missing server-side authorization checks (the frontend hides buttons but the backend still responds to direct requests), SQL queries built with string concatenation instead of parameterised queries, missing or weak input validation, outdated dependencies with known vulnerabilities, and no security headers configured on the server.
An exposed API key is a secret credential that has leaked from its intended location. This happens when keys are committed to Git, bundled into frontend JavaScript, included in error messages, or left in public repositories. The impact depends on the key: payment keys can allow fraudulent charges or refunds, database credentials allow data theft, and email service keys allow spam sent from your domain. Leaked keys must be rotated immediately — deleting the code is not enough, because the key may already be copied elsewhere.
A focused audit of a small to medium web app typically takes 3–7 days. Larger applications with multiple integrations, complex authentication and multiple user roles take longer. The audit produces a written report — issues found, severity, and recommended fixes — which you can then approve as a separate fix-and-harden project.
Not if done properly. Security fixes are applied incrementally, tested against the running application, and validated with the same user flows your app already supports. Where a fix requires user-visible changes — such as stronger password rules — these are communicated and phased in so existing users aren't locked out. No security fix should be rushed into production without testing.
Yes — if your app handles any of the following: user accounts and passwords, customer data, payments or payment details, private messages or documents, or admin access to business systems. Every app that stores or transmits this kind of data is a target. Small apps are often easier targets because attackers assume they have weaker security.
Tell me about your app — what it does, who uses it, what data it handles. I'll scope a security audit and tell you honestly what I'd check and what it costs. Fixed fee, written report, no surprises.
Confidential · NDA available · Read-only access · Nigeria-based, worldwide service