Hasif Seyd Mohammed
Berlin,BE
Summary
Senior Android Engineer with 12+ years of experience building, scaling, and optimizing large-scale production applications. Strong expertise in Kotlin, Java, Jetpack Compose, Android architecture, and application performance. Proven track record at Delivery Hero driving measurable improvements, including reducing WebView loading latency from 16s to 3s (P90) and cutting startup-related ANRs by 75%. Experienced in performance optimization, experimentation, observability, system reliability, and delivering scalable solutions for high-traffic logistics platforms.
Overview
13
13
years of professional experience
Work History
Senior Software Engineer
Delivery Hero
Berlin
03.2022 - Current
- Led the modernization of Delivery Hero’s rider app from Activity/XML-based screens to a **Kotlin-first, Jetpack Compose, map-centric architecture** built on Clean Architecture principles.
- Built and scaled Android features using Kotlin, Jetpack Compose, Coroutines, Flow, and modern state-management patterns.
- Improved application performance by reducing WebView chat loading latency from 16s to 3s (P90) and cutting Mapbox-related startup ANRs by ~75%.
- Led a major state-architecture migration that reduced network latency by ~40%** and **backend costs by ~30%.
- Drove observability, experimentation, and navigation initiatives using Sentry, Firebase Crashlytics, Mapbox, HERE Maps, and A/B testing.
Senior Android Application Developer
Tata Consultancy Services
04.2018 - 02.2022
- Working in rewriting of Macys Shopping App into Multi-Module Clean Architecture, which has helped in decoupling features and hence helping in faster release and management of independent features . App Crashes has reduced to 70% by rewriting legacy code into Kotlin. Introduced Generic theming and style guides for app which has also reduced usage of duplicate resources in legacy app and hence reduced the app size by 20%.
- Worked in developing independent Payment Module for M&S that could be used across all store application and hence reducing deployment timeline of release by 50%
Senior Android Application Developer
Samsung Electro-Mechanics
10.2016 - 03.2018
- Designed and developed a real-time messaging and audio/video communication platform using XMPP and VoIP protocols for Samsung Manufacturing Division, enabling secure internal collaboration across plant operations.
Architected and implemented a plant-wide push notification infrastructure using MQTT for intranet-only environments (no external internet access), ensuring reliable low-latency message delivery within restricted network boundaries.
Built a cross-platform desktop client of the messaging system using Java Swing and OSGi modular architecture, maintaining feature parity with the Android application.Worked in Developing Audio/Video calling and chat messaging application using XmPP and VOIP protocols for Samsung Manufacturing Division which has helped employees to communicate with each other. - Established entire push Notification setup for Samsung Intranet application that has no internet access outside the Plant using MQTT protocol.
- Took ownership in building the same chat application for Windows Desktop app using Java Swing and OSGI architecture.
Android Framework and App Developer
Huawei Technologies India Pvt Ltd
12.2013 - 10.2016
- Worked in Customization of Various System application like System-UI, Settings, Contacts, SystemManager.
- Took Ownership of Launcher app customization and managed 5 member team.
- Worked in Developing Decoupling Module for Android that keeps base android framework and customization in separate modules which has reduced android system crashed by 60%
- Developed Indoor car navigation Application using Bluetooth Beacons as part of Huawei R&D project.
- Was part of Android Platform porting team which ported generic customizations done on previous platforms to new platforms and help increase deployment timeline by 30%.
Education
Bachelor of Science - Electronics And Communication
KMEA Engineering College
Cochin05.2013
Skills
- Kotlin , Java, Kotlin Coroutines & Flow
- Jetpack Compose, Jetpack Compose UI Testing
- Android SDK / Android Framework
- Jetpack Libraries
- Clean Architecture , MVVM / MVI
- Modularization , Dependency Injection
- Android Performance Optimization , App Startup Optimization
- Memory Management & Profiling , Android Studio Profiler
- ANR & Crash Analysis
- Observability & Performance Monitoring
- Kotlin Multiplatform, React Native
- Git
- Firebase , Sentry, Playconsole vitals
Accomplishments
- Awarded Best Developer for Month of April(2019) M&S for developing independent payment Module for their In-store Application.
- Awarded Best Developer for the Month of Oct 2018 in M&S e-commerce app.
- Got Award from Huawei for Best code expert in contributing in Huawei Indoor Navigation Application.
Timeline
Senior Software Engineer
Delivery Hero
03.2022 - Current
Senior Android Application Developer
Tata Consultancy Services
04.2018 - 02.2022
Senior Android Application Developer
Samsung Electro-Mechanics
10.2016 - 03.2018
Android Framework and App Developer
Huawei Technologies India Pvt Ltd
12.2013 - 10.2016
Bachelor of Science - Electronics And Communication
KMEA Engineering College