Software testing and QA

Software Testing and QA for UK Product Teams

Catch problems before your customers do. We plan what to test, automate the checks that matter most, and give teams without dedicated testers a release process they can trust — even on a Friday afternoon.

  • Automated checks on every pull request
  • Accessibility tested against WCAG 2.2 AA
  • Bug reports a developer can act on

Why bugs reach customers

Bugs reach production through predictable gaps.

Few teams skip testing on purpose. It gets squeezed by deadlines, left to developers checking their own work, or buried under a test suite nobody trusts any more.

What good QA gives you

Testing is not about finding every bug. It is about knowing, before each release, that the things that matter still work:

  • Critical journeys checked automatically on every change
  • Releases that no longer need a nervous all-hands check
  • Bug reports developers can act on straight away
  • Accessibility and performance evidence for buyers who ask
  • A support inbox that stays quiet after a release

Developers testing their own work

The person who built a feature tests the path they had in mind. Customers take the other paths — the back button, the expired session, the half-completed form.

Fixes that break something else

Without a regression suite, every release is a gamble. A change to the checkout quietly breaks invoicing, and nobody notices until a customer phones.

A test suite nobody trusts

Flaky end-to-end tests fail at random, so the team learns to ignore red builds — which is worse than having no tests, because it looks like safety.

Tested only on the team’s laptops

Fast Wi-Fi, recent MacBooks and Chrome. Your customers use older Android phones, Safari, screen readers and patchy 4G on a train.

How we work

How we set up testing that lasts.

The same seven stages we use for any build, applied to quality: understand the risk, test the most important things first, and leave behind a suite your team keeps using.

  1. 01

    Discovery

    We learn how the product is used, where it has broken before, what your support inbox complains about and how releases happen today.

    A map of risk across the product

  2. 02

    Strategy

    We decide what to automate and what stays manual, which browsers and devices to cover, and the release criteria everyone agrees to hold to.

    A written test strategy

  3. 03

    UX & architecture

    We turn the critical user journeys into test cases, and set up test data and environments that behave like production without copying real personal data.

    Test cases, data and environments

  4. 04

    Development

    Automated tests are written in sprints alongside or after the features they cover, reviewed like any other code and run in CI on every pull request.

    An automated suite running in CI

  5. 05

    Testing

    Exploratory sessions, device and browser runs, accessibility checks and load tests, with every issue logged with steps, screenshots and a severity.

    A prioritised defect log

  6. 06

    Launch

    A release checklist and a UAT round with your team, so the people who know the business confirm it works as they expect before customers see it.

    UAT sign-off and release notes

  7. 07

    Optimisation & support

    We keep the suite green as the product changes, fix or remove flaky tests rather than ignoring them, and extend coverage wherever bugs keep appearing.

    A maintained, trusted test suite

Technology

Tools and techniques we test with.

We work with the frameworks already in your codebase where they are sound, and add what is missing rather than starting a parallel test project.

Test automation

PlaywrightCypressUnit and integration testsAPI and contract tests

CI and reporting

GitHub ActionsChecks on every pull requestTest reports and screenshotsFlaky-test tracking

Browsers and devices

Chrome, Safari, Firefox and EdgeReal iOS and Android devicesTablet and small-screen layoutsSlow-network conditions

Accessibility

WCAG 2.2 AAKeyboard-only testingVoiceOver and NVDA screen readersAutomated accessibility scans

Performance

Load and stress testingCore Web VitalsAPI response timesDatabase query profiling

Test management

Risk-based test plansReproducible bug reportsRelease checklistsUAT scripts

Automated tests reduce risk; they do not remove it. We are clear about what is covered, what is not, and why.

Use cases

When UK teams bring in QA.

Usually at one of these moments — when the cost of a bug reaching customers suddenly becomes obvious.

Before a launch

Pre-launch test sweep

A focused round of exploratory, device, accessibility and load testing before a new product or major release goes public, with a clear list of what must be fixed first.

Teams without testers

A part-time QA function

Developers keep building while we own the test plan, the regression suite and the release checklist — without you hiring a full-time QA lead yet.

Legacy products

A safety net before refactoring

Characterisation tests that pin down how an old system behaves today, so a rewrite or framework upgrade can go ahead without silently changing what it does.

Public sector and enterprise bids

Accessibility evidence

A WCAG 2.2 AA audit with a prioritised fix list and a retest, for procurement questionnaires and your own duties under the Equality Act.

eCommerce and bookings

Checkout regression suite

Automated checks of search, basket, payment and confirmation emails on every change, so a Friday deploy cannot quietly stop orders over the weekend.

Growing platforms

Load testing before a busy period

Simulated traffic ahead of a campaign, a sale or enrolment week, so you find the breaking point in a test rather than on the day.

Why Techsleight

What working with us is actually like.

No inflated numbers — just how we run projects, and what you can hold us to.

Product engineering, not ticket-taking

We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.

AI where it earns its place

LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.

Full-stack under one roof

Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.

UK-focused delivery

UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.

Flexible engagement

A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.

You own everything

Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.

Support after launch

We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.

FAQs

Questions we get asked.

Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.

Ask us a question

How much do software testing services cost?

It depends on the size of the product and what you need. A one-off test sweep or accessibility audit is scoped and quoted as a fixed piece of work; ongoing QA can be billed hourly, from £20 an hour, or run as part of a dedicated team. We look at your release process first, so we do not quote for testing you do not need.

Should we automate all of our tests?

No. Automate the checks you need on every release — sign-in, payments, the core journeys — and anything tedious to repeat by hand. Keep people on exploratory testing, usability and features that are still changing, where automated tests cost more to maintain than they save.

Do you use Playwright or Cypress?

Both. For new suites we usually recommend Playwright, because it runs against Chromium, Firefox and WebKit — the engine behind Safari — and copes well with multiple tabs and users. If your team already has a healthy Cypress suite, we extend it rather than replacing it for the sake of it.

Can you test software that someone else built?

Yes. We need access to a test or staging environment, test accounts and whatever documentation exists. We learn the product through exploratory testing before writing any automation, and log findings in your existing tracker so your developers can pick them up straight away.

Do you test accessibility against WCAG 2.2 AA?

Yes. Automated scans catch only part of the picture, so we combine them with manual keyboard and screen-reader testing on the journeys that matter. You get a prioritised list of failures against WCAG 2.2 AA with suggested fixes, and we retest once they are resolved. Whether that meets your legal obligations is for you to confirm; we provide the evidence.

Which devices and browsers will you test on?

The ones your customers use. We check your analytics first and agree a list — typically current Chrome, Safari, Firefox and Edge, plus a spread of iPhones and Android phones including older, mid-range models. Real devices find problems that desktop browser emulation misses.

Can you do load and performance testing?

Yes. We script realistic user journeys, ramp traffic up to and beyond your expected peak in a production-like environment, and report where response times degrade and what gives way first — database, API or a third-party service — with recommendations to fix it.

How do you report bugs?

In your own issue tracker, with steps to reproduce, expected and actual behaviour, environment details, screenshots or a recording, and a severity rating. The aim is that a developer can fix the issue without needing to ask a single follow-up question.

Do you help with user acceptance testing?

Yes. We write UAT scripts in plain language for the people who know the business, run the sessions with them, log what they find and track each issue to closure. UAT is where your team confirms the software does the job — it should not be where basic bugs are found for the first time.

Can you add tests to a product that has none?

Yes. We start with end-to-end tests on the journeys that would hurt most if they broke, then add unit and integration tests around the code that changes most often. Coverage grows where the risk is, not evenly across the codebase, so you get protection early rather than after months of test writing.

Start a project

Worried about your next release?

Tell us about the product, how you release today and where bugs keep slipping through. We will suggest where testing effort would make the biggest difference first.

  1. 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
  2. 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
  3. 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.

Techsleight Labs is a trading name of Krapton IT Consultancy.

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