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

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

"Ready" means I can send paid traffic to the app without expecting a security incident, broken onboarding, or a support fire drill within 24 hours.

For a bootstrapped SaaS, that is not a vague feeling. It means the domain resolves correctly, email delivers, SSL is valid, secrets are not exposed, auth is not bypassable, the app can survive basic abuse, and monitoring tells you when something breaks before customers do.

If you are planning paid acquisition, I would set this bar:

• Zero exposed secrets in repo, logs, frontend bundles, or public env files.
• SPF, DKIM, and DMARC all pass for outbound email.
• Production deploy is on a stable domain with HTTPS only.
• Critical auth flows have no bypasses and no public admin surfaces.
• p95 API latency is under 500ms on normal load.
• Uptime monitoring and alerting are live before ad spend starts.

If any of those fail, you are not launch ready. You are buying traffic into risk.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | Domain setup | Root domain and www resolve correctly, no loops | Paid traffic needs one canonical entry point | Lost conversions, SEO dilution | | HTTPS | SSL valid on all public routes | Users and browsers expect secure transport | Browser warnings, trust loss | | Email auth | SPF, DKIM, DMARC all pass | Transactional email must land in inboxes | Verification emails fail, support load rises | | Secrets handling | No secrets in repo or client bundle | Exposed keys become instant attack paths | Data exposure, billing abuse | | Auth controls | No auth bypasses on protected routes or APIs | SaaS value depends on tenant isolation | Account takeover, data leaks | | Redirects | HTTP to HTTPS and non-canonical domains redirect cleanly | Prevents duplicate content and mixed access paths | Broken links, inconsistent sessions | | Cloudflare/WAF | Basic DDoS protection and rate limits active | AI-built apps often miss abuse controls | Bot spam, credential stuffing | | Deployment safety | Production deploy uses locked env vars and rollback path | Fast fixes matter during launch week | Downtime during updates | | Monitoring | Uptime checks and error alerts are active | You need signal before ad spend scales issues | Silent outages, delayed response | | Logging/privacy | Logs exclude tokens and sensitive payloads | Logs often leak more than code does | Secret exposure through observability |

The Checks I Would Run First

1. Domain and redirect integrity

Signal: `http://`, `https://`, `www`, root domain, and subdomains all resolve to one intended production surface with no redirect loops.

Tool or method: I test with browser dev tools plus `curl -I` against every hostname. I also check Cloudflare DNS records and page rules.

Fix path: I set one canonical host, force HTTPS at the edge, remove duplicate A/CNAME records, and make sure marketing links point to the same origin. If your paid ads land on three different variants of the same app, you will bleed conversion.

2. TLS and certificate coverage

Signal: SSL is valid across the main app domain and any subdomains used for auth, billing, or API access.

Tool or method: I use SSL Labs plus direct browser checks for mixed content warnings.

Fix path: I issue or renew certificates through Cloudflare or your host, then verify that every asset loads over HTTPS. If login pages or checkout pages throw certificate errors even once during launch week, users will leave.

3. Secret exposure review

Signal: No API keys, webhook secrets, JWT signing keys, OpenAI keys, Stripe secrets, or database credentials appear in Git history, frontend code, build output, logs, or public `.env` files.

Tool or method: I scan the repo with secret scanners like Gitleaks or TruffleHog and inspect deployed bundles in the browser network tab.

Fix path: I rotate anything exposed immediately. Then I move secrets to server-side environment variables only and lock down who can read them. If a key shipped to the browser once, assume it is compromised.

4. Authentication and authorization

Signal: Protected endpoints reject anonymous requests; users cannot access another tenant's data by changing IDs; admin-only routes are not guessable.

Tool or method: I test direct API calls with Postman or curl using no token, wrong token, expired token, and another user's token.

Fix path: I enforce server-side authorization on every sensitive route. UI hiding is not security. If your app trusts the frontend to protect resources, paid acquisition will expose that flaw fast.

5. Email deliverability setup

Signal: SPF passes from your sending domain; DKIM signs messages; DMARC policy exists with alignment working for transactional mail.

Tool or method: I check DNS records in Cloudflare plus test sends through Gmail and Outlook inboxes.

Fix path: I configure the sender identity properly for your mail provider and validate bounce handling. For bootstrapped SaaS with signup verification or receipts tied to revenue flow, this is not optional. If verification emails go to spam at a 30 percent rate, your acquisition cost rises immediately.

6. Edge protection and rate limiting

Signal: Basic bot filtering exists on login, signup, password reset, and public APIs; repeated requests get throttled instead of hammering your backend.

Tool or method: I simulate bursts using curl loops, Postman runner, or simple load tests. I also review Cloudflare firewall events if enabled.

Fix path: I add rate limits per IP, per account, and per endpoint where needed. I block obvious abuse patterns at the edge first. A small SaaS does not need enterprise-grade defense on day one, but it does need friction against credential stuffing, scraping, and spam signups.

SPF: pass
DKIM: pass
DMARC: p=quarantine; rua=mailto:dmarc@yourdomain.com

Red Flags That Need a Senior Engineer

1. Your frontend contains secret-looking values

If you see API keys, service tokens, or private URLs in shipped JS bundles, I would stop launch work immediately. That usually means someone confused client config with server secrets.

2. Auth logic lives mostly in the UI

If route guards exist only in React state, the backend may still be wide open. That creates account takeover risk even when the interface looks protected.

3. You do not know where production data lives

If customer records sit across multiple databases, third-party tools, and AI integrations without clear ownership, you have a data mapping problem. That becomes a breach problem later.

4. There is no rollback plan

If one bad deploy can take down onboarding, billing, or email sending for hours, you are one release away from lost revenue. A senior engineer should put rollback discipline around that stack before ads start spending.

5. You already had one unexplained incident

A weird login event, spam signup wave, broken webhook, or mystery invoice spike means your app has already been probed. That is usually enough reason to bring in someone who audits behavior instead of just shipping features.

DIY Fixes You Can Do Today

1. Rotate obvious secrets now

Change any keys you pasted into chat tools, frontend files, or shared docs. Then delete them from public places. This takes 20 minutes and removes one of the biggest launch risks.

2. Turn on Cloudflare proxying

Put your main domain behind Cloudflare if it is not already there. Enable HTTPS enforcement and basic WAF protections. This gives you immediate edge coverage without rewriting code.

3. Audit your signup flow manually

Create a fresh test account with a personal email address. Check whether verification lands in inbox versus spam, whether password reset works, and whether protected pages stay protected after logout. This catches real customer failure points faster than reading code alone.

4. Review DNS records line by line

Remove old A records pointing at dead hosts. Confirm MX records match your mail provider. Make sure subdomains like `app`, `api`, and `mail` point where you expect. Bad DNS causes invisible launch failures that look like "the app is down."

5. Add uptime monitoring before ads start

Set up checks for homepage availability, login page availability, and one critical API route. Alert yourself by email or Slack within 1 minute of failure. If you cannot detect downtime quickly, paid traffic becomes wasted spend during outages.

Where Cyprian Takes Over

When DIY stops being safe enough, this is where my Launch Ready sprint takes over.

• DNS cleanup maps to:
• Domain setup
• Subdomains
• Redirects
• Canonical host selection

• Transport security maps to:
• SSL
• HTTPS enforcement
• Mixed content fixes

• Edge protection maps to:
• Cloudflare setup
• DDoS protection
• Caching rules
• Basic WAF/rate limiting

• Email trust maps to:
• SPF/DKIM/DMARC
• Sender identity validation
• Deliverability checks

• Production hardening maps to:
• Deployment review
• Environment variables
• Secrets handling
• Safe handover checklist

• Operational safety maps to:
• Uptime monitoring
• Error visibility
• Launch handoff notes

The goal is simple: make the app safe enough to accept paid acquisition traffic without exposing customer data or burning budget on preventable failures.

Here is how I would run it:

If your checklist fails at discovery stage but the product otherwise works well enough to sell traffic into it later,

I would still recommend this sprint before scaling ads. The cost of one broken launch week can exceed the entire fix price very quickly through refunds,

support time,

and lost momentum.

References

• roadmap.sh code review best practices: https://roadmap.sh/code-review-best-practices
• roadmap.sh API security best practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh cyber security roadmap: https://roadmap.sh/cyber-security
• OWASP Top 10: https://owasp.org/www-project-top-ten/
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/

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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.*