🚀 Senior Software Engineer (Mobile) | Android Specialist | Tech / Team Lead
What started as curiosity for mobile apps turned into a 8+ year journey of building Android experiences used by thousands across fintech, e-commerce, IoT, and consumer platforms.
I specialize in Android development with Java & Kotlin, modern Jetpack architecture, and clean, scalable system design. I enjoy turning complex, real-world problems into elegant architectures and intuitive user experiences.
Alongside engineering, I’m deeply interested in startups, product innovation, and tech-driven solutions that improve life and business. I’ve led features, mentored developers, and guided teams of up to 5 engineers on multiple projects.
- Android (Java, Kotlin)
- Jetpack (Compose, ViewModel, Navigation, Room)
- MVVM & Clean Architecture
- Coroutines & asynchronous programming
- Firebase (Auth, FCM, Analytics, Crashlytics)
- POS & Hardware Integration (AIDL)
- REST / JSON / Shopify integrations
- Performance optimization & legacy refactoring
Oct, 2019 – Feb, 2026
- Building fintech & payment platforms with real-world scale
- Worked on wallets, QR payments, POS integration, cash management systems
- Led feature development and mentored teams of up to 5 developers
- Designed and improved clean, modular Android architectures
- Hands-on with Kotlin, Jetpack Compose, Clean Architecture, AIDL, hardware integration
Key Projects:
Lov.Cash · Smart Safe · Klik.Klak
Sep, 2017 – Nov, 2018
- Built and maintained e-commerce, restaurant, and marketplace apps
- Developed customer apps + manager/admin apps
- Integrated payment gateways, Firebase (FCM), and POS printers
- Collaborated closely with backend & product teams
Key Projects:
Sam’s Coffee · Facilici · Honest Greens · Cera CSP
Aug, 2016 – Sep, 2017
- Developed Android apps across social, utility, and productivity domains
- Worked extensively with Java, XML, SQLite, JSON
- Built apps involving OCR, PDF generation, image-based analysis
- Delivered multiple apps as a solo developer
Key Projects:
Rockaloo, Photo Notes · OSR GAI · Watch Me · Engage
- Fintech & Digital Payments
- E-commerce & Marketplaces
- IoT & Hardware-Integrated Systems
- Food & Restaurant Tech
- Agriculture & Image-based Analysis
- Advertising & Kiosk Platforms
- Social & Communication Apps
- Productivity & Utility Tools
A modern digital payment ecosystem supporting personal users, businesses, and agents, with cashback, marketplace, POS integration, and blockchain-backed infrastructure.
Tech: Kotlin, Jetpack Compose, Clean Architecture, POS integration, Shopify
Role: Developer | Feature ownership, architecture contribution
Team Size: 3
An Android application connected to a Smart Safe / ATM-like machine allowing users to deposit physical cash and receive digital balance in wallet apps.
Tech: Kotlin, Jetpack Compose, MVVM, AIDL, POS integration
Role: Developer | Core logic & UI
Team Size: 2
A shopping platform built for Zimbabwe, integrating suppliers, collections, products, and POS-based payments.
Tech: Java, XML, AIDL, Shopify, POS integration
Role: Sole Android Developer
Team Size: 1
Customer ordering app with online payments, plus a Manager app to receive orders and print receipts via POS machines.
Tech: Java, XML, FCM, Payment Gateway
Role: Developer
Team Size: 2
An app for farmers and agronomists to determine crop Green Area Index using photographs — niche domain with real-world impact.
Tech: Java, XML, Image processing
Role: Sole Android Developer
Team Size: 1
A note-taking app that captures images, extracts text using OCR, and converts notes into PDFs.
Tech: Java, XML, SQLite, OCR, Tesseract
Role: Sole Android Developer
Team Size: 1
- Led feature development across multiple projects
- Mentored and guided teams of up to 5 developers
- Acted as bridge between product, backend, and mobile teams
- Improved legacy codebases through architectural refactoring
- Active Stack Overflow contributor in the past
- Strong believer in continuous learning & experimentation
- Currently exploring Flutter & cross-platform architecture
- LinkedIn: https://www.linkedin.com/in/arzzz/
- GitHub: https://github.com/Arzz
- Stack Overflow: https://stackoverflow.com/users/5157421/arjun-vyas
If you want to collaborate, discuss ideas, or just say hi — I’m always open to meaningful conversations 🚀