Launch Ready cyber security Checklist for AI-built SaaS app: Ready for first 100 users in coach and consultant businesses?.

What "ready" means for a coach and consultant SaaS app

For this kind of product, "ready" does not mean polished. It means a coach can sign up, log in, pay, use the core workflow, and not expose customer data or break email deliverability in the first 100 users.

I would call it ready when these are true:

• No exposed secrets in code, logs, or browser bundles.
• Authentication works reliably for sign up, login, password reset, and logout.
• Authorization blocks users from seeing another customer's data.
• Domain, SSL, redirects, and subdomains are correct.
• SPF, DKIM, and DMARC pass so onboarding and receipt emails land in inboxes.
• The app is deployed to production with monitoring on.
• Uptime alerts exist before the first paid user complains.
• Basic rate limiting is in place to reduce brute force and abuse.
• The onboarding flow works on mobile because coaches live on phones.
• The app can survive 100 users without obvious downtime, broken sessions, or support chaos.

If any one of those fails, you do not have a launch-ready SaaS. You have a prototype that may create refund requests, support load, or worse, a security incident.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | Domain setup | Root domain and www resolve correctly | Trust and brand consistency | Broken links, duplicate content, lost signups | | SSL | HTTPS everywhere with no mixed content | Protects login and payments | Browser warnings, blocked forms | | Redirects | 301 redirects are correct and consistent | SEO and user routing | Duplicate pages, lost traffic | | Email auth | SPF, DKIM, DMARC all pass | Inbox delivery for onboarding and receipts | Emails land in spam or fail | | Secrets handling | Zero secrets in repo or client code | Prevents account takeover and leaks | API abuse, billing loss | | Auth checks | No critical auth bypasses found | Protects customer data | Cross-account access | | Rate limiting | Login and API abuse throttled | Stops brute force and scraping | Account attacks and outages | | Monitoring | Uptime alerts active with owner set | Detects downtime fast enough to act | Silent failures and missed sales | | Deployment safety | Production deploy is repeatable and rollback-ready | Reduces release risk | Broken release stays live | | Performance baseline | LCP under 2.5s on key pages; p95 API under 500ms for core endpoints | Conversion and perceived quality | Drop-offs before signup completes |

The Checks I Would Run First

1. Secrets exposure check

• Signal: API keys, JWT secrets, Stripe keys, OpenAI keys, or database URLs appear in Git history, `.env` files committed by mistake, frontend bundles, logs, or issue screenshots.
• Tool or method: I would scan the repo history, build output, environment files, CI logs, and browser source. I also check whether secrets were rotated after exposure.
• Fix path: Remove secrets from code immediately. Rotate every exposed credential. Move all sensitive values into server-side environment variables only. If a secret touched a public repo or client bundle once, I treat it as compromised.

2. Authentication and authorization review

• Signal: Users can access another user's records by changing an ID in the URL or request body. Password reset flows are weak. Admin routes are hidden by UI only.
• Tool or method: I test direct object access across endpoints like `/api/users/:id`, project IDs, invoice IDs, coach/client records, and admin actions. I try logged-out access too.
• Fix path: Enforce authorization on every server-side request. Use role checks plus ownership checks. Never trust frontend route guards alone. Add tests for denied access paths.

3. Email deliverability check

• Signal: Welcome emails go to spam or never arrive. Password reset messages fail silently. Transactional mail shows "via random provider" warnings.
• Tool or method: I verify DNS records for SPF/DKIM/DMARC and send test messages to Gmail and Outlook accounts. I inspect headers for alignment and authentication results.
• Fix path: Configure sender domain properly. Publish SPF with only approved senders. Sign outbound mail with DKIM. Set DMARC to at least `p=quarantine` once alignment passes.

```txt v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s ```

4. Deployment environment audit

• Signal: Development settings are live in production. Debug mode is on. Database migrations are manual and risky. Frontend env vars contain private values.
• Tool or method: I compare local `.env`, staging config if it exists, CI variables, hosting settings, and runtime logs. I check that production uses separate credentials from dev.
• Fix path: Split dev/staging/prod environments cleanly. Turn off debug flags. Store secrets only in host-managed secret storage or CI secret vaults. Add a repeatable deploy checklist.

5. Cloudflare and edge protection review

• Signal: The app has no WAF rules, no DDoS protection posture, no caching strategy for static assets, or bad redirect loops after proxying through Cloudflare.
• Tool or method: I inspect DNS records, proxy status, cache rules，SSL mode，and page rules/redirect rules behavior under real requests.
• Fix path: Put the domain behind Cloudflare correctly. Enable SSL full strict where possible. Cache static assets aggressively but never cache authenticated pages unless explicitly designed to do so.

6. Monitoring and failure visibility check

• Signal: Nobody gets alerted if the site goes down or the login endpoint starts failing at night.
• Tool or method: I verify uptime monitors against homepage plus one authenticated health endpoint if available. I check alert routing to email/Slack/SMS and confirm ownership.
• Fix path: Add uptime checks for the public site plus core app route(s). Set alert thresholds so one failed probe does not create noise but repeated failures trigger action fast.

Red Flags That Need a Senior Engineer

1. You found one secret in the frontend bundle

That usually means there are more hidden problems elsewhere too.

2. The app has multi-tenant data but no real authorization tests

For coach businesses this is dangerous because one client's notes or payment data leaking into another account destroys trust immediately.

3. Deployments are manual copy-paste jobs

If every launch depends on memory and Slack messages at midnight, you will eventually ship broken config.

4. Email setup was "whatever worked in dev"

That creates silent revenue loss because password resets and onboarding emails fail without obvious errors.

5. You cannot explain where logs go

If there is no clear answer for error logging,, uptime alerts,, or incident ownership,, you do not have operational control yet.

DIY Fixes You Can Do Today

1. Search your repo for secrets

Look for `sk_`, `pk_`, `AIza`, database URLs,, JWT secrets,, webhook signatures,, OAuth client secrets,, private keys,, and `.env` files committed by mistake.

2. Turn on MFA everywhere

Secure GitHub,, hosting,, Cloudflare,, email provider,, Stripe,, OpenAI,, Firebase/Supabase/AWS accounts with MFA now.

3. Verify your DNS records

Make sure root domain,,, `www`,,,, mail sender records,,, SPF,,, DKIM,,, DMARC,,,and any subdomains point to the right services.

4. Test login from incognito on mobile

If signup,,, login,,, password reset,,,or checkout fails on iPhone Safari or Android Chrome,,, fix that before paying for ads.

5. Add one uptime monitor today

Monitor the homepage plus the main app route every 5 minutes from at least two regions so you know when production is broken.

Where Cyprian Takes Over

Here is how I map failures to deliverables:

| Failure found | Launch Ready deliverable | |---|---| | Domain confusion / bad redirects | DNS cleanup,, redirects,, subdomain setup | | SSL warnings / mixed content | Cloudflare configuration,, SSL enforcement | | Spammy onboarding email | SPF/DKIM/DMARC setup | | Secret leakage risk | Environment variable cleanup,, secret handling review | | Weak deployment process | Production deployment hardening | | No uptime visibility | Monitoring setup with alert routing | | Cache / DDoS gaps | Cloudflare caching ,, DDoS protection tuning | | Missing handover docs | Handover checklist with owner actions |

My delivery sequence is simple:

1. Hour 0 to 8: audit domain,,,,email,,,,deployment,,,,and secret exposure. 2.. Hour 8 to 24::: fix DNS,,,,SSL,,,,Cloudflare,,,,and transactional email auth. 3.. Hour 24 to 36::: deploy production safely,,,,verify environment variables,,,,and rotate any exposed secrets. 4.. Hour 36 to 48::: add monitoring,,,,run launch checks,,,,and hand over a clear owner checklist.

The business outcome is not "better infra." It is fewer failed signups,,,,fewer spam complaints,,,,lower support load,,,,and a cleaner path to your first 100 users without embarrassing outages.

A practical decision rule

If your app handles payments,,,,customer notes,,,,coaching plans,,,,or private intake data,,,do not launch until auth ,,,,secrets ,,,,and email are verified first.

If you only have time for one improvement today,,,,fix security boundaries before design polish.

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/

---

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.*