Startup and MVP services

Startup Software Development for UK Founders

A technical partner from first idea to first engineering hire. We help you test the idea before you build it, ship a focused first version, improve it with real users, and get the product ready for investor scrutiny.

  • Honest advice on what not to build yet
  • You own the code, IP and cloud accounts
  • Documentation your first CTO can pick up

Where startups get stuck

The MVP is rarely where it goes wrong.

Early-stage products usually stumble either side of the build: an idea that was never properly tested, or a first version nobody knows how to improve, secure or hand over.

What good early-stage engineering looks like

The startups that move fastest treat technology as a series of small, reversible bets:

  • Test demand with the cheapest thing that answers the question
  • Build version one around a single audience and job
  • Measure usage from the day real users arrive
  • Keep the codebase clean enough to show an investor
  • Hire engineers onto a documented product, not a mystery

Building before validating

Months of development go into a product that a handful of customer conversations would have reshaped. The code works; it just solves a problem people will not pay for.

No plan after launch

The MVP ships, sign-ups trickle in, and nobody is measuring what users actually do — so the next quarter of work is chosen by opinion rather than evidence.

A codebase that fails due diligence

Investors and acquirers often commission a technical review. Missing documentation, shared admin passwords and no tests can turn a funding round into a clean-up project.

No technical voice on your side

Non-technical founders end up choosing stacks, agencies and freelancers on trust, with nobody to challenge an estimate or explain what a trade-off really costs.

How we work

How we work with early-stage teams.

The same seven stages as every project, sized for a startup budget: short discovery, small releases, and decisions revisited as the evidence comes in.

  1. 01

    Discovery

    We work out where you are — idea, prototype, live product or raising — and the decision in front of you, then find the cheapest way to get evidence for it. That is not always software.

    The next decision and how to test it

  2. 02

    Strategy

    We map the stages ahead — validate, build, iterate, raise — and agree what to spend now and what to defer until there is evidence or funding to justify it.

    A staged plan with a budget per stage

  3. 03

    UX & architecture

    We prototype the core journey and test it with target users, and choose an architecture that is simple to change and easy to hire for.

    Tested prototype and stack decision

  4. 04

    Development

    Two-week sprints with a demo at the end of each. After launch the rhythm continues, with every sprint tied to a product measure you care about.

    Releases linked to product measures

  5. 05

    Testing

    Automated tests written as we build, then manual QA, accessibility and performance checks before anything goes live.

    Test evidence and a release checklist

  6. 06

    Launch

    Go-live with analytics, error tracking and a simple admin panel — plus clear records of who owns which accounts, domains and licences, which investors will ask about later.

    A live product with clean ownership

  7. 07

    Optimisation & support

    Ongoing iteration, a due diligence pack when you raise, and help recruiting and onboarding your first engineers when you are ready to bring the work in-house.

    Iteration, diligence pack or handover

Technology

A stack chosen to be easy to hire for.

Mainstream, well-documented technology, so your first in-house engineers are productive quickly and no investor has to ask why you chose something obscure.

Web apps

Next.jsReactTypeScriptVue

Mobile apps

React NativeFlutterSwiftKotlin

Backend and APIs

Node.jsPythonLaravelREST and GraphQL APIs

Data

PostgreSQLMySQLFirebaseRedis

Hosting and delivery

VercelAWSDockerGitHub Actions

Running the business

Stripe subscriptions and paymentsProduct analyticsError monitoringAdmin dashboards

If a no-code tool, a spreadsheet or an off-the-shelf product answers your question more cheaply, we will say so before we quote for custom code.

Use cases

Where founders bring us in.

Different starting points, same aim: the next decision made on evidence rather than guesswork.

Pre-product founders

Test the idea before building it

A prototype, a landing page and a round of user interviews to find out whether the problem is real — and whether people will pay to have it solved.

Post-launch startups

Turn early usage into a roadmap

Set up the events and funnels that show where users drop off, then work through the fixes in priority order, one sprint at a time.

Founders preparing to raise

Technical due diligence prep

Tidy the repository, document the architecture, review access and dependencies, and close the obvious security gaps before an investor’s adviser finds them.

Inherited codebases

Take over from a freelancer or agency

Recover access to repositories, domains and cloud accounts, review what exists, and make it safe to keep building — or explain honestly why a rebuild is cheaper.

Growing startups

Survive the first traffic spike

A launch, a press mention or a large customer onboarding exposes slow queries and fragile background jobs. We find the real bottlenecks and fix them in order.

Non-technical founders

A technical voice in the room

Someone to sit in on supplier calls, review estimates, sanity-check an architecture proposal and help you interview your first developer or CTO.

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 is this different from your MVP development service?

MVP development is one stage of this journey: building a focused first release, which our dedicated MVP development page covers in detail. Startup services are everything around it — testing the idea before you build, iterating once users arrive, preparing for investor due diligence and scaling as usage grows.

We are non-technical founders. Can you act as our technical partner?

Yes. We explain decisions in plain English, give you options with the trade-offs spelled out, and never ship anything you cannot see on a staging environment first. We will also help you judge other suppliers’ proposals — and tell you when it is time to hire in-house rather than keep paying us.

What should we do before spending money on a build?

Talk to potential customers, write down the one assumption that would sink the business if it were wrong, and find the cheapest way to test it. Sometimes that is a prototype or a landing page; sometimes it is running the service by hand for your first customers. A paid discovery sprint, from £2,000, is where we help if you want support.

How do you decide what to build after launch?

From evidence. We set up product analytics and error tracking at launch, agree the few measures that matter at your stage — activation, retention, conversion to paid — and plan each sprint around moving one of them. Feature requests go on a list and are weighed against those measures rather than built on arrival.

Can you help us prepare for technical due diligence?

Yes. We review the codebase, dependencies, access controls, infrastructure and documentation the way an investor’s technical adviser would, fix what matters most, and produce an architecture overview and an honest list of known limitations. We do not advise on the legal or financial side of the investment.

What will investors look for in our codebase?

Usually: that the company owns the code and accounts outright, that a new engineer could pick the product up from its documentation, that the critical paths have tests, and that obvious risks — shared passwords, secrets in the repository, unpatched dependencies — have been dealt with. Few expect perfection at seed stage; they do expect no nasty surprises.

Can you help us hire our first in-house developers?

We can help write the role, review CVs and technical tests, join interviews to assess technical depth, and onboard new hires onto the codebase. We are not a recruitment agency and do not place permanent staff — the aim is to make your hires productive quickly, not to hold on to the work.

Our product was built by a freelancer who has disappeared. Can you help?

Often, yes. The first job is recovering access — domain, hosting, app store accounts, repository and third-party services — and making sure each one is in your company’s name. Then we review the code and give you an honest recommendation: keep and improve, partly rebuild, or start again.

How much does it cost to work with you as a startup?

Discovery sprints start from £2,000, and builds are quoted as fixed-price projects once the scope is agreed. For ongoing iteration, a dedicated developer starts from £2,900 a month, and smaller pieces of work can be billed hourly from £20 an hour. We will suggest the lightest model that fits the stage you are at.

Will you sign an NDA before we share our idea?

Yes, on request, before discovery starts. Everything we create for you — code, designs, documentation and the cloud accounts it runs in — belongs to your company from day one, so there is no awkward conversation about ownership when you raise or sell.

Start a project

Not sure what your startup needs next?

Tell us the stage you are at and the decision in front of you. You will get a straight view on the most useful next step — even if it is not a build.

  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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