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QA OUTSOURCING · PENETRATION TESTING · MVP DEVELOPMENT

QA, security and development.

Your QA team without hiring, for products with revenue: every release tested for bugs, vulnerabilities every month, and a ship-or-not verdict by the next business day. Pentests and MVP development from the same team. Fixed prices.

Free: no card, no access to your app.

What your product needs

Free app review

Not sure where to start? Send a link. Within 2 business days of the review’s start we show in the chat how many risks are visible from outside, the most important one in full, and which of our services covers the rest. Up to 10 reviews a week — the chat shows your start date.

Get the review
PIPERLINK · TEST REPORTFictional example
Acme PortalTest report · app version 1.4
VerdictDo not release until the 2 critical and 3 high bugs and vulnerabilities are fixed.
2Critical3High3Medium2Low
ScenarioPassedFailed
Sign-up and login122
Catalogue, cart, payment113
E-mails91
Customer account93
Admin101
B-01Critical

Pressing “Pay” twice creates two orders and charges twice

  1. Open the payment page /checkout.
  2. Enter the test card 4242 4242 4242 4242.
  3. Quickly press “Pay” twice.
Stripe · Payments (test mode)

$24.00 · Succeeded · 14:02:11

$24.00 · Succeeded · 14:02:11

AI prompt

On the payment page, disable the “Pay” button and show a spinner from the first click until the request finishes. In the create-payment function, make the request idempotent: generate one key per cart and return the existing payment when the same key arrives again. Add a test: two clicks within 300 ms create exactly one order and one charge.

6 more bugs and 3 vulnerabilities — with steps, screenshots and prompts

Open the full report →
02 / PENETRATION TESTING

We attack like a hacker —
only with your permission.

A cybersecurity specialist tries to reach other users’ data, your keys and the admin panel. You get a report by risk level, a retest and a letter for your customers’ security questionnaires.

For products with data and payments

Pentest

$990 per platform
  • By hand, to OWASP WSTG and ASVS level 1
  • Sign-in and sessions, roles and access to other users’ data
  • Up to 50 API endpoints, payments and business logic
  • A report by risk level, a retest and a letter for security questionnaires — not a certificate
Penetration testing: scope and process →
PENTEST REPORTFictional example
shop.exampleOWASP WSTG · ASVS level 1
1High2Medium3Low
V-01High

Other users’ orders visible by number

  1. Sign in as buyer A
  2. Open GET /api/orders/1042 — buyer B’s order
  3. The server returns 200 with B’s address and phone
api.shop.example

GET /api/orders/1042

Authorization: Bearer “token A”

HTTP/1.1 200 OK

"phone": "+380 •• ••• •• 17"

Recommendation

Check on the server that the order belongs to the token’s user, and answer 404 for anyone else’s.

MVP PLANFictional example
Class booking · yoga‑studio.appHandover by Friday, 20 November

Goes into $3,490

  • Sign-up and sign-in (e-mail, Google)
  • Schedule and class booking
  • Card payment, receipt by e-mail
  • A trainer’s account
  • Admin: classes, clients, payments
  • 8 screens · web for desktop and phone

Next — sprints

  • An iPhone app — 1 sprint
  • SMS reminders — half a sprint
  • Passes and discounts — 1 sprint
After you approve the plan
$1,745
At handover
$1,745
WHY PIPERLINK

One team.
No surprises.

What you can count on, from the free review to the subscription.

01 / PRICE

A fixed price

You see the total before paying. No estimates, no hourly billing.

THE TOTAL BEFORE YOU PAY
02 / INDEPENDENT

Other people test

A developer never tests their own code: a QA engineer and a cybersecurity specialist do.

NOT WHOEVER WROTE THE CODE
03 / GUARANTEES

Guarantees in our terms

One-off bug testing: no bug found — 100% back. Subscription: a late report doesn’t count against your limit. Development: 10% off for each full business week we are late, up to 30%.

DETAILS IN THE REFUND TERMS ↗︎

Who we are

TEAM
QA engineers, cybersecurity specialists and developers, working from Ukraine.
HOURS
Mon–Fri, 9:00–19:00 Kyiv time. A report due by 19:00 in Kyiv reaches New York around noon.
BUSINESS
A registered sole proprietor in Ukraine — details under Contacts.
CONTACT
Your manager answers in the project chat.
HOW IT WORKS

From a link
to the result.

The same for any service: no meetings to book, no extra forms.

01

Choose a service.

Pick it from the prices above.

OR A FREE REVIEW FIRST
02

Send a link or an idea.

An app, a website or a repository — or a few sentences about your idea. You pay by card or invoice; for an MVP, once you approve its plan.

A LINK IS ENOUGH
03

The result in the chat.

A plan, a report with bugs, or a working app — and a retest where there are bugs.

ALL IN ONE CHAT
QUESTIONS

A few good
questions.

Where do I start?

Your product earns and ships often: the QA team, or a $299 test first. Your app is built with AI: bug testing of 10 screens for $149. You have an idea: MVP launch. Not sure: the free review shows how many risks are visible from outside and which service covers them.

What does one release test cover?

One platform: a regression of up to 10 main scenarios plus what is new or changed in the release — up to 5 screens or one feature — a ship-or-not report by the end of the next business day, and a retest of the bugs you fix. A bigger release, or the same release on web and iOS, takes more than one test. Unused tests carry over to the next paid month, up to one month’s norm.

How do you handle access to our app and data?

You give us test accounts with minimum permissions, in the project’s secure field — never in the chat. Only the specialists on your order use them; we delete them within 14 days after the work ends, and you can revoke them at any time. Findings stay confidential and are never published without your permission. Vulnerability testing starts only after you accept our security testing authorization.

Can we try before subscribing, and cancel later?

Yes. Start with bug testing ($299) or bugs + vulnerabilities ($499); subscribe within 30 days and its price comes off your first month. The subscription is billed monthly and cancelled with one button in the project details.

Do you fix the bugs?

Every bug comes with a ready prompt for your AI tool. We can fix them too: after a one-off test, bugs from $190 for up to 10, vulnerabilities at $490 for up to 5 findings, with a retest.

How is the free review different from the paid services?

The review looks only from outside, without access: how many risks we see by level and the most important one in full. The full list with places, steps, AI prompts and a retest is a paid service — for example the $149 express security audit.

What currency do you charge in?

Prices are fixed in US dollars, and you see the total before paying. A card is charged the hryvnia (UAH) equivalent at the rate at the moment of payment: the WayForPay page shows the amount before you confirm, and your card’s bank may convert at its own rate and add a fee. Yearly plans, Team monthly and any order over $3,500 are paid by invoice in US dollars.

One team,
from idea to every release.