Senior Engineering Vulnerability Assessment

Find Out What Breaks Before Your Users Do.

Your app works in the demo. The Battle Test Audit shows whether it holds up for real users, real payments, and real attackers. Senior engineers test your live product and deliver a Loom walkthrough, a severity-rated report, and an upfront fix cost for every issue.

$499One-time full audit
5 business days to report
FreeQuick check to start
Get a Free Quick Check
Our Guarantee: Fewer than 10 real issues found? Full $499 refund.
39+ production apps shipped•5.0 average client rating•5+ years senior engineering•US registered LLC: DEVSANDLOGICS LLC
bash — battle-test-audit v2.4
live probe
$ battle-test run app.yourstartup.com --depth=full --simulate-attacks
✓ passLanding page & core web vitals load in 1.4s
✓ passEmail signup & verification loop verified
✕ criticalCustomer table readable without login (Supabase RLS disabled)— 1,284 customer records accessible via anon public key
✕ highStripe webhook endpoint skips signature verification— Forged checkout.session.completed payloads trigger free plan upgrades
✕ highProduction OpenAI & Supabase keys exposed in client bundle— NEXT_PUBLIC_ env prefix leaked secret server keys
✓ passResponsive dashboard grid renders on iOS & Android
✕ mediumOnboarding wizard crashes when user presses browser back button— Unmanaged state desynchronization in multi-step form
✕ mediumReports table query takes 9.2s with 500 records— Missing composite index on user_id + created_at
✕ low14 uncaught JavaScript console errors on /settings tab— Null reference exception when profile avatar is empty
Summary: 42 checks, 7 issues, 1 critical vulnerability.Est. fix time: 26 hours
AI & Fast-Build Pitfalls

Built Fast? These Are Usually Hiding in It.

Apps built with Bolt, Lovable, Replit, or Cursor, or by a rushed freelancer, tend to fail in the exact same places. Most founders only find out after a customer or attacker does.

Critical Data Leak

Open Database Access

Missing row-level security (RLS) lets anyone read or overwrite other tenants’ sensitive records with a simple curl request.

“Common in Bolt, Lovable, Supabase & Firebase setups where default policies allow public anon reads.”
Financial & Security Risk

Leaked Secrets & Keys

OpenAI, Stripe secret keys, or database service roles accidentally shipped in frontend bundles where anyone can inspect them.

“Founders discover unauthorized $2k OpenAI API bills when bots harvest exposed keys.”
Revenue & Churn Risk

Silent Payment Failures

Unverified webhooks, subscriptions that never cancel, or upgrades that charge customers without unlocking the feature.

“Customers cancel in Stripe portal, but your database keeps subscription active forever.”
Account Takeover

Broken Auth Boundaries

Password reset links that never expire, unauthenticated admin routes reachable by guessing URLs, or broken session invalidation.

“Accessing /admin directly renders user tables without checking role claims.”
Conversion Killer

Flows That Crash Off Happy Path

Browser back buttons, rapid double clicks, empty states, and slow networks crash the UI or create duplicate transactions.

“Double-clicking "Submit Payment" fires two simultaneous charges to Stripe.”
Operational Blindness

Zero Monitoring or Backups

No Sentry, no automated daily backups, and no alert triggers—so every bug arrives as an angry customer email or lost deal.

“Silent 500 errors happen for days without any team notification.”
Eligibility

Is This Right For You?

We believe in transparent scoping so neither of us wastes time.

A Great Fit If You:
  • Built your app with AI tools (Bolt, Lovable, Replit, Cursor) and want it safe before scaling
  • Inherited code from a freelancer or a previous agency and suspect hidden technical debt
  • Are about to launch, run paid advertising, or onboard larger enterprise customers
  • Preparing for fundraising or an upcoming investor technical due diligence review
  • Have a working web or mobile product that users can log in to
Not The Right Fit If You:
  • Do not have a working product or MVP yet (start with our $499 Discovery Sprint instead)
  • Need a formal SOC 2 Type II or ISO 27001 regulatory compliance audit certificate
  • Cannot provide a staging account or test login credentials for our engineering team
Transparent Engagement

Start Free. Pay Only When You've Seen the Value.

Three structured milestones. You can stop after any of them with full ownership.

STEP 012 business days

Free Quick Check

$0

We inspect your public web app like a real user and record a concise Loom walkthrough showing 2 to 3 real issues we identified.

  • Zero call or code access required
  • Public pages and signup only
  • Actionable Loom recording delivered in 48 hours
Recommended
STEP 025 business days

Battle Test Audit

$499

With test credentials, our senior engineers go through your full product: authenticated flows, Stripe billing, data security, performance, and code.

  • Up to 5 core user flows tested end-to-end
  • Fix estimate in hours and dollars for every issue
  • Severity-rated PDF report + 30-min walkthrough call
STEP 03Starts in < 1 week

Fix It, or Don’t

Fixed Price

Use the audit report with your own developers, a freelancer, or hire us. Every fix is quoted upfront from the report with no open-ended billing.

  • $499 audit fee credited 100% toward any fix package
  • Re-test included after fixes are deployed
  • Fixed scope with clear completion milestones

Our Promise: If we find fewer than 10 real issues, you get your $499 back.
*Real means something a customer, payment flow, or attacker could actually hit. No padding the list with style nitpicks.

Exhaustive Review

What the Audit Covers

Checked by senior engineers using your app as real users, edge cases, and attackers would. Not an automated scan with a generic PDF report.

Security & Auth

  • •Database row-level security (RLS) & data leakage
  • •Exposed production secrets & frontend API keys
  • •Session tokens, password resets & role-based access
  • •Unprotected internal API endpoints & CORS policies

Payments & Billing

  • •Stripe checkout, subscriptions & tier upgrades
  • •Webhook signature validation & idempotency
  • •Cancellation, refund & failed charge state sync
  • •Access gating when payment fails or lapses

Core User Flows

  • •Signup, email verification & onboarding steps
  • •Primary product feature tested end-to-end
  • •Edge cases, invalid input handling & empty states
  • •Transactional emails & notification delivery

Performance & Speed

  • •Page speed & Google Core Web Vitals audit
  • •Slow database queries & unindexed queries
  • •Large bundle sizes & redundant re-renders
  • •Behavior under simulated multi-record load

Mobile & Cross-Browser

  • •iOS Safari, Android Chrome & desktop viewports
  • •Touch interactions, keyboards & viewport cutoffs
  • •Sticky headers, modals & horizontal overflow
  • •Form input usability & touch targets

Infrastructure & Ops

  • •Vercel/AWS environment configs & secrets hygiene
  • •Error monitoring setup (Sentry, LogRocket, etc.)
  • •Database backup frequency & restore safety
  • •Deploy and rollback pipeline resilience

Code & Architecture

  • •Repository modularity & maintainability (read-only)
  • •Risky or deprecated third-party npm packages
  • •Bottlenecks that will break when traffic hits 10x
  • •TypeScript strictness & unhandled Promise rejections

AI Features (If Used)

  • •Prompt injection & system prompt leak risks
  • •Runaway token costs & missing usage limits
  • •Model timeout, fallback & rate limit handling
  • •Structured output validation & schema failures
Staging First:We test on staging whenever available so live users are never touched.
Test Accounts Only:Our own accounts and Stripe test mode. Zero destructive operations without your OK.
Signed NDA Available:Signed by DEVSANDLOGICS LLC. Revoke access the moment you receive the report.
Deliverable Preview

Sample Report Entry

Clear enough for a non-technical founder, specific enough for any developer to act on immediately.

Issue 1 of 7

Any visitor can read every customer's invoices

Critical Severity
Where It Occurs:

`invoices` table, Supabase PostgreSQL

Estimated Fix:

3 hours • $150

What Happens:

Row-Level Security (RLS) is disabled. A simple curl request using your public anon key returns all 1,284 customer invoice rows, complete with customer names, emails, and amounts.

Business Impact:

Major data breach exposure. Dealbreaker in any enterprise B2B sales or investor security review.

How to Fix:

Enable RLS on `invoices` table and attach an owner-only policy on `auth.uid() = user_id`. Rotate the Supabase service key.

Post-Audit Resolution

After the Audit: Fix What Matters

Your report decides the price, not a guess. Every fix is quoted upfront at a fixed price.

Fix Sprint

$1,500 – $3,000
1 to 2 weeks

All Critical and High severity issues resolved, re-tested, and deployed. The fastest, most cost-effective way to make your app safe for real customer payments.

Stabilize & Harden

From $5,000
2 to 4 weeks

Every issue in the report resolved, plus automated end-to-end testing on core flows, Sentry error monitoring, automated backups, and clean CI/CD deploy pipeline.

Modern Rebuild

Custom Quote
4 to 8 weeks

When patching brittle prototypes costs more than rebuilding. We rebuild cleanly on Next.js, TypeScript, and PostgreSQL while migrating all your existing users and data.

Credit Offer: Your $499 audit fee is credited in full toward any fix package started within 30 days of your report.

Zero Commitment

Request Your Free Quick Check

Send us your live app link. Senior engineers will review your public flows and send you a concise Loom showing 2 to 3 real issues within 2 business days.

Strict privacy. No credit card required. Under DEVSANDLOGICS LLC non-disclosure policy.

Got Questions?

Frequently Asked Questions

No. A test account on your staging or production app is enough to test everything a customer or attacker can reach. If you choose to grant read-only GitHub repository access, we will also include a code-level architectural review and dependency check.
Direct Engineering Access

Know Exactly What's Broken in 5 Days.

Start with a free quick check or schedule a direct call with lead engineer Muhammad Talha to walk through your product architecture.

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