For hire
wbtech.in
Hire me

Flutter + Firebase · taking new projects

Flutter apps,
built to ship.

I'm Raihan Sk, a freelance Flutter & Firebase developer. I build Android & iOS apps with a Firebase backend — from the first screen to the store launch.

Start a project See my apps
4.6/5 from 193 client reviews on Fiverr ↗
8+ yrs
building for clients
4+ yrs
with Flutter
30+
Flutter clients
14
own apps live

01Work()

Apps I've designed, built & shipped.

Every app below is live on Google Play under wbtech.in — games, business tools, learning apps and more. Same craft goes into client work.

All apps

See all apps on Google Play

02Services()

What I can build for you.

From a first version that proves your idea to a polished app your customers use every day.

  • Cross-platform apps

    One Flutter codebase for Android and iOS — native performance, half the build and maintenance cost.

  • Startup MVPs

    A production-grade first version on Flutter + Firebase, scoped tightly so you can launch, learn and raise faster.

  • Business & management apps

    Bookings, customers, staff, fees and reports — the kind of tools I built in TutorPro and Salon Manager.

  • Casual games

    Puzzle and arcade games with tight game feel, ads and in-app purchases ready.

  • Store launch & ASO

    Play Console and App Store setup, listings, screenshots, policies and review — handled.

  • Rescue & maintenance

    Take over an existing Flutter app: upgrade packages, fix crashes, speed it up, ship updates.

03Stack()

Flutter front end.
Firebase back end.
One developer.

Most apps don't need a custom server. Firebase gives your app sign-in, a realtime database, push notifications and file storage — secure, scalable and cheap to run. I build both halves, so nothing gets lost between a front-end and a back-end team.

  • Security rules so users only ever see their own data
  • Data modelled to keep your Firebase bill low
  • Everything lives in your own Firebase account
lib/main.dart

YourApp(

ui: Flutter(android, ios),

backend: Firebase(

  • AuthenticationEmail, Google & phone OTP sign-in
  • Cloud FirestoreRealtime database that keeps working offline
  • Cloud FunctionsServer logic, payments & webhooks
  • Cloud MessagingPush notifications that bring users back
  • StoragePhotos, documents & media uploads
  • Crashlytics + AnalyticsSee what users do, fix crashes fast

),

);

04Process()

How a project runs.

No black box. You see the app on your own phone from the first weeks — not just at the end.

  1. 01

    Free discovery call

    30 minutes on your idea, users and budget. I'll tell you honestly what's worth building first.

  2. 02

    Scope & fixed quote

    A written feature list, milestones and a fixed price — so there are no surprises later.

  3. 03

    Design & prototype

    Screens and a clickable flow you can try before any heavy engineering starts.

  4. 04

    Weekly builds

    A fresh build on your phone every week. Feedback goes straight into the next one.

  5. 05

    Launch & support

    Store release under your own developer account, then fixes and updates as you grow.

I ship, not just code

Building for clients since 2018 and with Flutter since 2022 — 30+ Flutter clients, 193 reviews averaging 4.6★, and 14 apps of my own through Google Play review.

You own everything

Source code, store accounts and listings are yours from day one.

One point of contact

You talk directly to the developer building your app — no account managers in between.

05FAQ()

Questions clients ask.

How much does an app cost?

It depends on the screens, backend and integrations you need. After a free call I send a fixed quote split into milestones, so you only pay as work is delivered.

Do you work with clients outside India?

Yes. I work remotely with clients anywhere in English, Hindi or Bengali, keep a few overlapping hours with your timezone and share progress in writing so nothing gets lost.

Can I see reviews from past clients?

Yes. Before going independent I freelanced on Fiverr, where clients left 193 reviews averaging 4.6★. You can still read them on my old profile.

Do you build websites too?

Yes — I've built many WordPress sites for clients over the years. My focus today is Flutter apps, but I can set up a website or landing page alongside your app.

Can you take over an existing Flutter app?

Yes. I start with a short code audit, then fix the critical issues, upgrade dependencies and continue feature work.

Will you publish the app to the stores?

Yes — on your own Google Play and Apple developer accounts, including listings, screenshots and the review process.

06Contact()

Let's build
your app.

Tell me a little about the project. The form opens a ready-to-send email straight to my inbox.

What do you need?
Budget