The Flutter Expert. That’s Sakil.

Flutter,
Built to
Scale.

Book a Call

About Me

Crafting high-performance Flutter mobile applications with clean architecture, real-time communications, and fluid 60 FPS animations.

20+
Projects

Years of
experience

Creative

Reliable

Strategist

Builder

Efficient

S.E. Sakil Hossen
Start small grow big

About Me (&)
My Journey

My journey in software engineering started with computer science fundamentals and evolved into building cutting-edge mobile apps.

'21

Foundation in Computer Science

Started my software engineering journey with a Diploma in Computer Science & Technology at TMSS Polytechnic Institute.

Computer Science Education

@education
2021

'22

Mastering Flutter & Dart

First real client. First real panic. Working for yourself and working for someone else are completely different.

Mastering Flutter & Dart

@flutter
2022

'23

Real-Time Systems & Media

Engineered ultra-low latency live streaming and real-time chat feeds using Agora SDK & WebSockets.

Real-Time Systems

@realtime
2023

'24

FinTech & Payment Systems

Integrated secure multi-currency payments, Stripe, Apple Pay, and Google Pay into production mobile apps.

FinTech & Payment Systems

@fintech
2024

'25

SparkTech Agency Developer

Joined SparkTech Agency as Flutter Mobile Application Developer, delivering 15+ production apps.

SparkTech Agency

@sparktech
2025

'25

AI-Accelerated Workflows

Integrated advanced AI productivity into development, from rapid prototyping to intelligent debugging.

AI-Accelerated Workflows

@ai
2025

'26

Global App Store Deployments

20+ projects completed with 100% 5-star client satisfaction across Google Play and Apple App Store.

@sakil
Present

SELECTED WORK

Built with Flutter,
Engineered to Perform

Over seven years I've helped businesses across different industries turn their ideas into websites that look and work exactly how they imagined. Here's a look at some of that work.

Quran International
01
Flutter
Dart
Clean Arch

Quran International

A multilingual Quran application designed to bring the holy book to a global audience. It features dynamic script scaling, offline audio recitations, bookmarks, translations, and robust searching, built with clean architecture.

Live Stream App
02
Flutter
WebRTC
Agora SDK

Live Stream App

A high-performance live video streaming application with real-time comments, live reactions, audience interactions, and payment support. Built to handle low latency stream connections.

Restaurant Booking System
03
Flutter Web
REST API
BLoC

Restaurant Booking System

A premium table booking and reservation management system for restaurants. Features visual table mapping, menu pre-ordering, custom notifications, and interactive scheduling.

Job Booking System
04
Flutter
Firebase
Stripe

Job Booking System

A comprehensive marketplace app connecting service providers with clients. Features scheduling, Stripe payments, real-time tracking of providers, and in-app push alerts.

Onepipo
05
Flutter
Dart
Firebase

Onepipo

Believing that Africa, its diaspora, and the world can achieve more together, Onepipo is a social platform built for connection with purpose. It is designed for people who want more than passive scrolling and surface-level engagement. In a digital space often filled with noise and distraction, Onepipo creates an environment where conversations are meaningful, ideas are actionable, and communities are empowered to create real impact. Onepipo brings together Africans on the continent and across the diaspora into a shared space for collaboration,

Service provider apps - Txme
06
Flutter
Dart
Location

Service provider apps - Txme

This is a secure, location-based service marketplace platform that connects customers with verified service providers. The platform allows customers to discover nearby services, book appointments, make secure payments, and manage transactions through an integrated digital wallet. Service providers can subscribe to the platform, create and publish their services, manage booking requests, accept appointments, complete jobs, and receive payments directly through their in-app wallet. The application is designed with a strong focus on security, featuring KYC verification and biometric authentication such as Face ID on iOS and fingerprint authentication on Android. It also supports multiple payment methods, including Apple Pay, Google Pay, online payments, wallet payments, and cash payments. The platform provides a complete ecosystem for service discovery, booking, service management, payments, and digital wallet transactions for both customers and service providers.

Multi-Service Booking Platform
07
Flutter
Dart
REST API

Multi-Service Booking Platform

A simple and user-friendly service booking platform that connects customers with professional service providers. Customers can discover and book a wide range of professional services, including doctors, teachers, lawyers, and other service providers. Service providers can manage their services and booking requests, while customers can select a required service, choose a suitable provider, and schedule a booking based on their needs. The platform is designed to make professional service discovery and booking simple, fast, and convenient.

Period-Friendly Recipe & Food Recommendation App
08
Flutter
Dart
Health

Period-Friendly Recipe & Food Recommendation App

A personalized food and recipe recommendation app designed to help women discover suitable foods and recipes based on their menstrual cycle. Users can enter their period start date and cycle information to receive personalized recipe suggestions and helpful food recommendations. The app uses a swipe-based experience where users can swipe right to save a recipe and swipe left to skip it. The recommendation system learns from user preferences and gradually avoids suggesting foods that the user repeatedly skips. Users can explore recipes, follow cooking instructions, and easily understand which foods are recommended and which foods may be better to avoid during different stages of their cycle.

PoolPay – Smart Group Money Pooling & Savings (ROSCA)
09
Flutter
Dart
GetX

PoolPay – Smart Group Money Pooling & Savings (ROSCA)

PoolPay is a modern FinTech mobile application built with Flutter that revolutionizes Rotating Savings and Credit Association (ROSCA) and group money pooling. The platform allows friends, families, and communities to pool money, manage group savings, and rotate payouts transparently. It features tiered memberships (Guest, Regular, VIP) integrated natively with Google Play Billing and Apple StoreKit, real-time activity updates via WebSockets, and secure automated payouts using Stripe Connect.

Coffecito - Coffee Ordering & Rewards App
10
Flutter
Dart
GetX

Coffecito - Coffee Ordering & Rewards App

Coffecito is a modern, feature-rich coffee ordering and customer loyalty mobile application built with Flutter & Dart. It offers an intuitive beverage ordering experience with customizable drink options, a robust points and loyalty reward system, digital gift cards, multi-branch locator, and real-time order status tracking. Designed with clean architecture, responsive layouts via ScreenUtil, and efficient state management using GetX.

Jawa - Multiplayer Trivia & Board Quiz Game App
11
Flutter
Dart
GetX

Jawa - Multiplayer Trivia & Board Quiz Game App

Jawa is an engaging, interactive multiplayer trivia and quiz board game application built with Flutter & Dart. It offers both single-device local pass-and-play (Red vs. Blue team) and real-time online multiplayer game modes with custom game rooms (Meelas). The app features category-based trivia boards, point-based competitive question rounds, community hubs, global leaderboards (Weekly, Monthly, All-Time), and full bilingual support (English & Arabic). Architected using clean MVC patterns, GetX state management, and ScreenUtil for responsive cross-platform gameplay.

C-Service – On-Demand Home Care & Service Booking App with AI Assistant
12
Flutter
Dart
GetX

C-Service – On-Demand Home Care & Service Booking App with AI Assistant

C-Service is a comprehensive, production-ready on-demand home care and service marketplace mobile application built with Flutter and GetX. It provides a complete end-to-end ecosystem with dual user modes (Customer & Service Provider). Customers can easily discover household services, book appointments, track service history via 'Home Passport', and consult an integrated AI Home Care Assistant for troubleshooting and pricing estimates. Service providers can manage active tasks, update job statuses, and track revenue through real-time income analytics.

What
You Get?

Capabilities Overview

Strategy, precision, and        development  combined - turning          your vision into a powerful digital   experience         that feels     effortless.  

Strategy, precision,
and              development  combined - turning          your vision into a powerful digital   experience            that feels effortless.  

Cross-Platform Flutter Development

Single codebase delivering pristine 60 FPS native performance for iOS and Android with Clean Architecture and reactive state management.

Real-Time Systems & Media Streaming

Ultra-low latency live video feeds, WebSockets, instant messaging, and push notifications powered by Agora SDK and Firebase.

SEO-Ready Setup

App Store & Play Store Optimization (ASO), automated Fastlane CI/CD pipelines, instant cold boot, and full guideline compliance.

CLEAN ARCH

Creative & Interactive Motion

Clean Architecture with BLoC and Riverpod, separating UI, Domain, and Data layers for bulletproof maintainability and testability.

Performance & Technical Optimization

Making your site faster, cleaner, and built to last with technical SEO and performance best practices.

SERVICES

Solutions
That Deliver

Same quality, same attention to detail. The only difference is the size of the project and what you need right now.

Ongoing Support

$2,500

/ Month

Your dedicated Flutter mobile developer for ongoing features, API integrations, and monthly sprint delivery.

New pages, sections, and features

Campaign-driven updates (modules, content blocks, assets)

Maintenance, bug fixes, and
content updates

Technical SEO and performance optimization

Unused hours roll over
(up to 3 months)

For brands that need continuous growth and long-term collaboration.

Starter Build

$4,500

Complete end-to-end Flutter mobile app from design to Google Play & App Store launch in 3 to 4 weeks.
‍

Up to 12 screens & user flows

Clean Architecture (GetX/BLoC)

Fluid 60 FPS animations & REST API

Payment gateway (Stripe/In-App)

Launch within 3 to 4 weeks

Google Play & App Store submission included

For new sites or migrations that need a fast, clean start

Custom Project

Book a Call

High-end mobile engineering for complex architectures, real-time video streaming, and enterprise scale.
‍

Advanced interaction and
animation systems

Scalable backend API & Firebase architecture

Complex custom components & offline caching

Custom SDK integrations & hardware access

30 days post-launch support included

For complex projects that go beyond the basics and need a tailored approach.

Transform Your
Mobile App
Experience  
Journey

Every mobile product has room to grow. You get clean architecture, rock-solid scalability, and high 60 FPS performance from day one.

S.E. Sakil Hossen

Have something in mind?

TESTIMONIALS

From People
I've Worked with

Trusted
long-term collaborator.

Sakil has been a fantastic partner to work with and continues to be an essential part of our team. He communicates clearly and promptly, and his work consistently exceeds expectations. He resolves technical challenges quickly and efficiently, always demonstrating skill, reliability, and a strong commitment to quality.

Cultur | CEO Alosant

Cultur

CEO

Cultur

Thinks through
the entire experience.

Sakil doesn't just write Flutter code—he thinks through the complete mobile experience. Smooth 60 FPS animations, responsive UI layouts, and clean API integrations: all delivered with technical excellence.

Luke

Founder

SparkTech Agency

Reliable, skilled,
and easy to work with.

Sakil was great to work with! He delivered our websites on time, gave our design team helpful guidance, and suggested smarter solutions that really improved the final results. Super reliable and easy to collaborate with — highly recommend!

Cultur | CEO

Cultur

CEO

Cultur Media

The details that
set him apart.

I’ve worked with Sakil for many years, and he still surprises me with the speed and quality of his work. His attention to the small details, the ones most engineers overlook makes all the difference for great websites. He’s reliable, fun to collaborate with, and consistently delivers beyond expectations. As long as he wants to work with us, we’ll keep building together.

Johana | Co-Founder Moat agency

Luke

Founder & CEO

MobileFirst

Design-focused,
reliable development.

We’ve hired Sakil for several projects, and working with him has always been effortless thanks to his good understanding of design. He’s dedicated to perfecting each delivery for our clients, ensuring a smooth and engaging web experience.

Cultur Brand Designer | Legacy

Cultur

Cultur

A developer with a
true product mindset.

Sakil is a rare blend of speed, quality, and collaboration. He actively contributes ideas that improve how designs translate into development, and he approaches every build with a product mindset. He’s reliable, detail-oriented, and consistently delivers high-quality work on tight timelines.

Luke | Product Designer

Luke

Product Lead

A proven
expert you trust.

I have worked with Sakil on multiple mobile milestones and have always been impressed by his work ethic, fast turnaround, and attention to detail. Sakil clearly knows Flutter engineering and consistently delivers top standard results.

Cultur | CEO at SeeDesign

Cultur

Founder

Cultur

Exceptional leadership and technical ownership.

We loved working with Sakil on our mobile application. He showed exceptional technical ownership throughout the project, guiding key architectural decisions and ensuring a scalable outcome.

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