TAHIR MAHMOOD — Senior React Native Engineer

Professional Experience

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, and native iOS/Android integrations, focusing on healthcare 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.

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 encompassing 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.

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.

Academic Background

Quaid-i-Azam University

2017

Certifications & Courses

HIPAA Awareness for Business Associates · HIPAATraining.com

Data Protection Training (GDPR) · PROLIANCE GmbH

Application Security – The Complete Guide · Udemy

Healthcare Mobile Application for Asthma & COPD Management

Built and maintained a healthcare mobile application used by asthma and COPD patients to improve treatment adherence and disease management.
Developed cross-platform features using React Native, integrated REST APIs, implemented push notifications, offline synchronization, data export capabilities, and analytics dashboards.
Collaborated with product and medical teams to deliver a reliable and scalable patient-focused solution.

Healthcare Mobile Application for Asthma & COPD Management

Transparent Hands – Healthcare Donation & Fundraising Platform

Developed a cross-platform healthcare fundraising application using React Native, enabling donors to support patients through secure payment workflows powered by Stripe and PayPal.
Built patient case management, campaign tracking, push notifications, and analytics integrations.
Optimized performance for image- and video-heavy screens by implementing efficient FlatList rendering, lazy loading, pagination, and memory management techniques to ensure a smooth user experience across iOS and Android devices.

Transparent Hands – Healthcare Donation & Fundraising Platform

Medical Device Companion App with Bluetooth Integration

Developed a companion mobile application for a medical device that communicates via Bluetooth Low Energy (BLE).
Implemented device pairing, data synchronization, real-time communication, and device management features.
Designed and delivered reliable connectivity between mobile applications and external healthcare hardware while maintaining a seamless user experience.

Medical Device Companion App with Bluetooth Integration