Functional testing services

Functional testing that catches what your users would

Hands-on, manual functional testing for web applications — every critical flow exercised, every defect documented with evidence, every fix retested before you ship.

My functional testing methodology

A repeatable cycle that fits into your sprint rhythm — from planning to retest.

  1. 1

    Requirement & flow mapping

    I review your specs, designs, or staging build and map every critical user flow into a test plan — so coverage is explicit, not assumed.

  2. 2

    Test case design

    Positive, negative, boundary, and edge cases are written per flow. You get the case list before execution, so you can sanity-check priorities.

  3. 3

    Hands-on execution

    I execute manually across your target browsers and devices, exercising real user behavior — not just happy paths.

  4. 4

    Evidence-backed reporting

    Every defect ships with reproduction steps, expected vs actual behavior, screenshots or video, environment details, and a severity call.

  5. 5

    Retest & regression

    Fixed issues are retested and a focused regression pass confirms nothing else broke before you ship.

User flows I test

Coverage tailored to your product — these are the flows that most often hide release-blocking defects.

Onboarding & sign-up

Registration, email verification, profile setup, invite flows, and first-run states.

Auth & permissions

Login, logout, password reset, session expiry, role-based access, and gated routes.

Checkout & payments

Cart math, promo codes, taxes, payment success/failure paths, refunds, and order confirmation.

Forms & validation

Required fields, input masks, error messages, multi-step wizards, and file uploads.

Dashboards & CRUD

Create/read/update/delete flows, filtering, sorting, pagination, and empty states.

Integrations & states

Third-party webhooks, API error handling, loading states, offline behavior, and retries.

Tools I work with

Test case management

TestRail / structured spreadsheets for traceable cases

Bug tracking

Jira, Linear, GitHub Issues — I adapt to your tracker

DevTools inspection

Console, network, and storage inspection to pinpoint root causes

Cross-browser rigs

BrowserStack and real devices for Chrome, Safari, Firefox, Edge

API verification

Postman requests to confirm frontend bugs vs backend bugs

Functional bugs caught in the wild

Anonymized examples from real engagements.

E-commerce checkout blocker caught pre-release

A retail client's new checkout flow passed their smoke tests.

Functional testing revealed that applying a promo code silently dropped the shipping method, letting orders submit with €0 shipping — and failing downstream in fulfillment.

Fixed before launch; protected an estimated thousands in mis-shipped orders during the first campaign week.

SaaS permissions leak found in regression

A B2B SaaS team shipped role-based dashboards without a dedicated regression cycle.

A regression pass showed that demoting a user from admin to viewer left cached admin actions reachable via direct URL until a hard refresh.

Patched in the same sprint; the client added regression testing to every release afterward.

Ready to test your next release?

Book a kickoff call and I'll come back with a functional test plan within one business day.