TAHIR MAHMOOD — Senior React Native Engineer

About Me

I'm a Senior React Native & React Engineer with over a decade of experience in mobile and web application development. I specialize in creating secure healthcare solutions and enhancing performance through innovative architectures. My passion lies in delivering impactful products that improve patient outcomes and streamline healthcare workflows.

Professional Experience

Senior React Native Engineer

VisionHealth GmbH

November 2021 - Present

Munich, Germany

Key Responsibilities & Tech:

Lead development of patient-facing healthcare mobile applications for inhalation therapy across iOS and Android, supporting approximately 2,300 active users.
Own mobile architecture and technical implementation utilizing React Native, TypeScript, native iOS/Android integrations, and healthcare-focused workflows.
Contributed to two clinical trials, including VisionHealth's Kata study and a pharmaceutical collaboration with Sterna, supporting approximately 200 trial participants.
Implemented AI-assisted mobile features involving frame processing, audio analysis, and guided inhalation workflows.
Enhanced application startup performance by 20-30% and significantly reduced production crashes through optimization and proactive monitoring with Sentry.
Managed approximately 300 clinical devices through Apple Business Manager and Miradore MDM.
Oversaw iOS and Android release engineering using Fastlane, Azure DevOps, App Center, Xcode, and Android Studio.
Mentored junior developers and collaborated with product, design, backend, and clinical teams in a regulated healthcare environment.

Senior React Native & React Engineer

Embrace IT

January 2020 - November 2021

Islamabad, Pakistan

Key Responsibilities & Tech:

Developed and delivered cross-platform Android, iOS, and web applications for international healthcare, service, and events clients using React Native and React.
Created Android, iOS, and web platforms enabling virtual meetings and conferences during and after the COVID-19 pandemic.
Developed and delivered Servicelovers, a production mobile platform connecting customers with service professionals through ratings, digital tips, and employee recognition.
Built mobile workflows covering authentication, booking, chat, scheduling, push notifications, Google Maps, route tracking, and content-driven experiences.
Designed offline-first data handling and synchronization using Realm and Firebase for low-connectivity environments.
Integrated GraphQL and REST APIs for real-time and transactional application features.

React Native & React Engineer

Bitsol Technologies

March 2017 - December 2019

Islamabad, Pakistan

Key Responsibilities & Tech:

Developed Android, iOS, and web applications using React, React Native, TypeScript, Redux-Saga, and Android Java.
Implemented Bluetooth Low Energy (BLE) communication with external devices, including device communication, data capture, and synchronization with backend services.
Built features including chat, meeting booking, calendars, push notifications, payment flows, and rich content feeds across multiple applications.
Integrated REST APIs and third-party services to support production mobile applications.
Collaborated with cross-functional teams to deliver production-ready applications for healthcare, education, and e-commerce clients.