Modern Dart
Dart 3 with sound null safety, records, patterns and sealed classes — code that catches mistakes at compile time rather than in a one-star review.
Flutter development company · UK
Flutter Development Company in the UK
Work with a UK-focused Flutter development company for smooth app experiences, reliable releases, and mobile products ready for real users. Techsleight Labs plans, designs, builds, QA-tests, launches, and supports production software with senior engineers, weekly demos, and clear delivery ownership.
- Strategy, build, QA and launch in one team
- Fixed-price projects after discovery
- Code and IP owned by you
Capabilities
Flutter capabilities we bring to your product.
Flutter developers who write idiomatic Dart, keep widget trees lean, and drop into Swift or Kotlin when a plugin does not exist.
State management that scales
Riverpod or Bloc, chosen for your team and your app, with clear lines between UI, state and data so new features do not tangle old ones.
Platform channels and plugins
Method channels, Pigeon and Dart FFI to reach native SDKs for payments, Bluetooth or biometrics — and custom plugins when pub.dev has nothing reliable.
Smooth rendering
Profiling in Flutter DevTools, cutting needless rebuilds, lazy lists and image caching, so scrolling stays smooth on older phones as well as new ones.
Store-ready builds
Build flavours for development, staging and production, code signing, TestFlight and Play testing tracks, and automated pipelines with Codemagic or Fastlane.
Design systems in widgets
Your brand as a theme and a widget library, with Material or Cupertino behaviour where users expect each platform to feel familiar.
What we build
What we build with Flutter.
The Flutter projects UK teams bring us most — often where one small team has to serve both app stores.
Cross-platform MVPs
One codebase, both stores: onboarding, accounts, payments and analytics, planned over weeks rather than months so you learn from real users sooner.
Loyalty and ordering apps
Menus, baskets, loyalty cards and push offers connected to your till or eCommerce platform, with Apple Pay and Google Pay at checkout.
Offline-first job apps
Inspections, job sheets and proof-of-delivery apps that save work on the device, sync when signal returns, and capture photos and signatures.
Add-to-app features
Build new features in Flutter inside an existing iOS or Android app and move across gradually, instead of pausing everything for a rewrite.
Desktop and web from one codebase
Where it makes sense, the same Flutter code runs as a web app or a Windows or macOS desktop app for staff — not for public, search-driven sites.
Upgrades and rescues
Bring an app written for older Flutter and Dart releases up to date: null safety, abandoned plugins, Gradle and Xcode changes, and current store rules.
Technology stack
Technology stack.
The tools that usually sit around Flutter in the projects we join. We fit into your stack — this is where we are most at home.
Core
FlutterDart 3go_routerMaterial 3 and Cupertino
State and architecture
RiverpodBlocProvider (older apps)freezed and json_serializable
Data and back end
Firebase (FlutterFire)REST and GraphQL APIsDrift and SQLiteNode.js and Laravel back ends
Native integration
Platform channelsPigeonDart FFISwift and Kotlin plugins
Testing
Unit and widget testsGolden testsintegration_testFirebase Test Lab
Release and monitoring
CodemagicFastlaneFirebase CrashlyticsTestFlight and Play Console
Pricing
Flutter development pricing.
Start with discovery, move to a fixed-price build, or run a dedicated team for a longer roadmap.
Flutter discovery sprint
From £2,000
Architecture, roadmap, cost planning, and project-risk validation
- A short strategy sprint covering technical scope, user flows, delivery plan, and budget range.
Managed Flutter development project
Fixed quote
MVPs, rebuilds, SaaS platforms, dashboards, portals, and business-critical launches
- Product planning, UX, engineering, QA, deployment, and post-launch support under one delivery owner.
Dedicated Flutter development team
From £9,500 per month
Longer roadmaps, multi-sprint delivery, and product teams that need extra senior capacity
- A stable engineering pod with weekly demos, sprint planning, code review, and transparent reporting.
Prices are in GBP. Every estimate is confirmed in writing after a discovery call — the figures above are where engagements start, not a quote.
How we deliver
How we deliver your Flutter project.
Seven stages, the same on every project. The length of each one changes with the work; skipping one never saves time for long.
- 01
Product and technical discovery
We map your Flutter product goals, users, integrations, compliance needs, timeline, and commercial priorities before planning the build.
Goals, users and constraints agreed
- 02
Architecture and delivery plan
You get a practical Flutter roadmap with milestones, team shape, risks, estimates, and the first release path.
Roadmap, team and estimate
- 03
Design, build, and QA
Our team ships the Flutter product in controlled sprints with code review, testing, demos, and visible progress every week.
Tested software every sprint
- 04
Launch and improvement
We handle deployment, analytics, monitoring, handover, and post-launch iterations so your Flutter platform keeps improving.
Live, monitored and documented
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.
Relevant work
Related product work.
We do not have a published Flutter case study yet — these show the kind of product work our engineers join.
All case studiesFintech · Mobile
Sendora
Mobile-first money transfer and card app for a cross-border fintech.
React NativeNode.jsMapboxStripe
Read the case studyHealth & Fitness · Mobile
Workout Book
Fitness app for workouts, nutrition logging and progress tracking.
React NativeNode.jsFirebasePostgreSQL
Read the case studyHealthcare · eCommerce
Cyber Medic
Online pharmacy and lab-test booking app with prescriptions and delivery.
React NativeNode.jsStripeFirebase
Read the case studyFAQs
Questions we get asked.
Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.
What does a Flutter development company do?
A Flutter development company plans, designs, builds, tests, deploys, and supports Flutter software. At Techsleight Labs, that can include discovery, architecture, UI/UX, API integration, QA, cloud deployment, analytics, and post-launch roadmap support.
Do you work with companies in the United Kingdom?
Yes. This Flutter development company page is focused on United Kingdom businesses. We support UK collaboration with clear written updates, weekly demos, and planned handoff points so distributed teams can move quickly.
How much does Flutter development cost?
Flutter development pricing depends on scope, integrations, user roles, design depth, compliance needs, and launch timeline. Discovery sprints start from £2,000, dedicated teams start from £9,500/month, and managed projects are quoted after scope validation.
Can you build a complete Flutter product, not just provide developers?
Yes. You can use Techsleight Labs as a full Flutter development company for strategy, design, engineering, QA, deployment, and support. You can also start with a small discovery sprint before committing to the full build.
Can you improve an existing Flutter application?
Yes. We often join existing Flutter products to fix performance, improve architecture, add features, stabilise releases, modernise UI, or prepare the system for scale. We begin with a focused audit so the first sprint is practical.
Who owns the code and product IP?
You own the code, documentation, product IP, design assets, and infrastructure setup created for your project. We can sign an NDA before discovery and work inside your repositories, cloud accounts, and project tools.
How fast can a Flutter development project start?
Discovery can usually begin within a few working days of the first call, and most projects start within 5–7 working days of sign-off. Larger builds usually need a short planning sprint to confirm scope, architecture, milestones, risks, and the right team before full development begins.
Do you provide post-launch Flutter support?
Yes. After launch, we can continue with monitoring, bug fixes, performance improvements, security updates, roadmap features, analytics, and handover support. Many clients keep a monthly retainer after the main release.
Start a project
Planning a Flutter project?
Tell us what you are building with Flutter. We will reply within one working day with questions, a first view on approach and the next step.
What happens next
- 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
- 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
- 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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