About

Sabir Islam Khan is a full-stack web and mobile developer.

Based in Bangladesh and working with clients internationally, I design and build websites, web platforms, mobile apps, backends, and operational tools. I work directly with founders and teams from early product decisions through implementation and release.

Upwork profile GitHub

What I build

One product partner across the connected system.

Web products

Websites, product interfaces, dashboards, admin tools, and the systems that keep them useful as a business grows.

Mobile applications

Cross-platform iOS and Android products, including user journeys, application states, integrations, testing, and release support.

Backends and operations

APIs, databases, authentication, payments, cloud infrastructure, automation, and the operational workflows behind the customer experience.

Selected work

Products built around real workflows.

Healthcare product systemTakeCarePatient appointments, telehealth, messaging, medical records, reminders, and the operations dashboard used by care teams.Fitness community platformGymChampMember challenges, training progress, gym check-ins, community features, analytics, and coach-facing workflows.Live tournament operationsJudge MartialReal-time scoring, judge votes, brackets, penalties, match control, and resilient role-based event workflows.Fintech operationsEasyWalletPayments, transfers, KYC, settlements, fraud review, and support workflows across mobile and web.

Working style

Direct, visible, and end to end.

I begin with the commercial goal and the complete user journey, then turn that into product states, system boundaries, and a practical release plan.

Strategy, design judgment, frontend work, backend rules, deployment, and post-launch support stay in one conversation. Clients see working progress in small, reviewable slices.

My core tools include Flutter, TypeScript, Node.js, databases, APIs, cloud infrastructure, and modern web frameworks. The technology serves the workflow, not the other way around.