Launch Ready cyber security Checklist for AI-built SaaS app: Ready for paid acquisition in founder-led ecommerce?.

Launch Ready cyber security Checklist for AI-built SaaS app: Ready for paid acquisition in founder-led ecommerce?

"Ready" for this product and outcome means more than "the app works on my machine." For a founder-led ecommerce SaaS, ready means I can send paid traffic to it without creating a security incident, broken checkout flow, or support fire.

If you are spending money on Meta, Google, or influencer traffic, your app needs to survive real users, bad actors, and messy edge cases. My baseline is simple: zero exposed secrets, no critical auth bypasses, SPF/DKIM/DMARC passing, SSL everywhere, Cloudflare in front of the app, monitoring active, and the main user journey stable enough that a first-time visitor can sign up and reach value without hitting a 500 or a confusing dead end.

For paid acquisition, I also care about business risk. If login breaks, your ad spend gets wasted. If email deliverability is poor, verification and password resets fail. If CORS or auth is loose, customer data can leak. If deployment is fragile, one bad push can take the funnel down during a campaign.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | | --- | --- | --- | --- | | Domain and DNS | Domain points to the correct production app with clean redirects | Users and crawlers land on the right property | Broken landing pages, duplicate content, trust loss | | SSL everywhere | HTTPS enforced on all routes and subdomains | Protects sessions and customer data | Browser warnings, session theft risk | | Email authentication | SPF, DKIM, and DMARC all pass | Verifications and receipts actually arrive | Signup failures, spam folder delivery | | Secrets handling | No secrets in repo, logs, or client bundle | Prevents account takeover and data exposure | Leaked API keys, cloud bills, breach risk | | Auth controls | No auth bypasses; roles enforced server-side | Protects customer accounts and admin actions | Unauthorized access to orders or PII | | CORS and headers | Tight CORS allowlist; secure headers set | Reduces cross-site abuse and browser attacks | Token theft, XSS impact grows | | Rate limiting | Login, signup, reset, webhook endpoints limited | Stops brute force and abuse spikes | Account lockouts, fraud, downtime | | Monitoring | Uptime alerts and error alerts active before launch | You need to know when revenue breaks | Silent outages during paid traffic | | Deployment safety | Production deploy is repeatable with rollback path | Prevents bad releases from killing conversions | Extended downtime during launch window | | Performance baseline | Core pages load fast; target LCP under 2.5s on mobile | Paid traffic converts worse when slow | Higher bounce rate and wasted ad spend |

The Checks I Would Run First

1. Secrets exposure audit

• Signal: API keys in `.env`, Git history, frontend bundles, logs, or CI output.
• Tool or method: Search repo history with `git log`, scan bundles manually in browser devtools, run secret scanners like GitHub secret scanning or TruffleHog.
• Fix path: Move all secrets to environment variables in the host platform. Rotate any key that may have been exposed. Remove secrets from history if they were committed.

2. Authentication and authorization test

• Signal: A normal user can access admin routes or another user's records by changing an ID.
• Tool or method: Manual role testing plus a proxy like Burp Suite or browser devtools. Try direct URL access and ID swapping.
• Fix path: Enforce authorization on the server for every protected action. Never trust client-side role checks alone. Add tests for owner-only access and admin-only actions.

3. Email deliverability check

• Signal: Verification emails land in spam or never arrive.
• Tool or method: Check SPF/DKIM/DMARC at your DNS provider. Send test messages to Gmail and Outlook. Use MXToolbox if needed.
• Fix path: Publish correct DNS records for SPF/DKIM/DMARC. Use a reputable transactional email provider. Confirm the "From" domain matches your sending setup.

4. CORS and security header review

• Signal: `Access-Control-Allow-Origin` is set to `*` with credentials enabled or headers are missing entirely.
• Tool or method: Inspect network responses in browser devtools or use `curl -I`.
• Fix path: Restrict CORS to known domains only. Add security headers like CSP where practical, plus HSTS on HTTPS sites.

5. Production deployment sanity check

• Signal: The app behaves differently between local preview and production.
• Tool or method: Compare env vars between environments. Trigger a full signup flow on production after deploy.
• Fix path: Standardize build steps and environment variables. Add a rollback plan so you can revert within minutes if production breaks.

6. Monitoring and alerting validation

• Signal: You only find out about outages from customers.
• Tool or method: Check uptime monitors like UptimeRobot or Better Stack. Trigger a test alert by hitting a known failing endpoint.
• Fix path: Monitor homepage uptime, login success rate if possible, error rate spikes, and SSL expiry. Route alerts to email plus Slack if used by the team.

Red Flags That Need a Senior Engineer

1. You have no idea where secrets live

• If keys are scattered across Lovable exports, Vercel env vars, Supabase settings, Stripe webhooks, and local files with no inventory, DIY becomes guesswork.

2. Auth logic exists in the frontend only

• If "admin" buttons disappear based on UI state but server routes still accept requests from anyone logged in as a normal user, that is not security.

3. Email verification is flaky

• If users report missing signup emails even once during testing with real inboxes like Gmail and Outlook.com, paid acquisition will amplify the problem fast.

4. The app was stitched together by multiple AI tools

• When React code from one builder meets backend logic from another tool with no shared conventions, hidden regressions are common after deployment.

5. You cannot explain rollback

• If one bad deploy would require "figuring it out live," do not buy traffic yet. That turns ad spend into outage funding.

DIY Fixes You Can Do Today

1. Rotate any secret you can already see

• If you spot API keys in code or screenshots today, rotate them now.
• Treat anything copied into chat tools or pasted into repos as compromised until proven otherwise.

2. Turn on Cloudflare basics

• Put the domain behind Cloudflare.
• Force HTTPS redirect at the edge so every request uses SSL.

3. Check email DNS records

• Confirm SPF includes your sending provider.
• Make sure DKIM is enabled.
• Publish DMARC with at least `p=none` first so you can observe reports before enforcing stricter policy.

4. Test signup end-to-end with real inboxes

• Use Gmail plus Outlook plus one work email if possible.
• Create an account from scratch.
• Verify password reset works too.

5. Create one simple monitoring alert

• Set uptime monitoring for your homepage and login page.
• Set one error alert for your production API if your platform supports it.
• This alone can save hours of blind downtime during launch week.

A minimal DMARC record looks like this:

v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

Where Cyprian Takes Over

This is where I step in when the checklist shows launch risk that could burn ad spend or expose customer data.

• DNS cleanup and redirects

I fix domain routing so the main domain lands on production cleanly in under 48 hours of work time inside a 48 hour delivery window.

• Cloudflare hardening

I put the app behind Cloudflare for SSL termination support where needed, caching rules where safe to use them internally at the edge level only for public assets), DDoS protection basics), WAF tuning if appropriate), and redirect control.

• Email authentication setup

I configure SPF/DKIM/DMARC so signup emails and receipts stop landing in spam folders.

• Production deployment

I move the app into production safely with environment variables separated from codebase files), then verify release behavior against real traffic conditions.

• Secrets review

I audit environment variables), remove exposed credentials), rotate what needs rotation), and make sure nothing sensitive ships to the client bundle).

• Monitoring handover

I set up uptime monitoring), basic alerting), and hand over a checklist so you know what to watch after launch).

• Launch handover checklist

You get a clear list of what was changed), what still needs attention), who owns each system), and what to do if something fails during paid acquisition).

References

• https://roadmap.sh/cyber-security
• https://roadmap.sh/api-security-best-practices
• https://roadmap.sh/code-review-best-practices
• https://developers.cloudflare.com/ssl/
• https://dmarc.org/overview/

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*