SIUpwork

Flutter apps. Node.js backends. Product systems.

I build clean mobile products.

Sabir Islam Khan

I build mobile apps, Node.js backends, admin dashboards, and product workflows for teams that need clean execution without unnecessary noise.

My work usually sits between product design and engineering: translating business flows into clear screens, stable APIs, and admin tools that teams can actually operate.

TakeCare healthcare portfolio preview
TakeCare LimitedFlutter
EasyWallet finance app interface
EasyWalletFintech
VoltRide electric bike app interface
VoltRideEV mobility
Judge Martial live scoring dashboard
Judge MartialLive operations

Who I am.

I am a full-stack developer focused on product implementation: Flutter on the client, Node.js on the backend, and admin tools for the work behind the product.

I care about the pieces users do not see too: authentication states, empty states, data contracts, role-based operations, and the small UI details that keep a product feeling calm.

Expertise

What I work on.

F

Flutter apps

Mobile interfaces, navigation, stateful flows, responsive layouts, forms, dashboards, and app polish.

N

Node.js backend

APIs, authentication-aware workflows, data models, notifications, integrations, and admin-facing state.

A

Admin dashboards

Queues, dispatch, scoring, KYC, risk, settlements, reports, and tools built for repeat daily use.

Stack

Tools I use.

Flutter
Dart
Node.js
REST APIs
Firebase
PostgreSQL
Admin dashboards
Realtime flows

Portfolio

Selected projects.

Pick a project. Images stay large so the work is easy to inspect.

Healthcare app + care operations

TakeCare

Appointments, records, telehealth, messaging, reminders, and care-team dashboards.

Flutter UXPatient workflowOperations dashboardNode.js APIs
TakeCare portfolio screen 1TakeCare portfolio screen 2

Contact

Need a Flutter app or Node.js backend?

Tell me what you are building. I will help turn it into a clean app and useful system.

Hire me on Upwork