Senior POS Mobile Engineer

Overview

Senior POS Mobile Engineer to build, optimize, and maintain high-performance Android POS applications for large-scale transaction environments.

What you'll do

• Design, implement, and maintain Android-based POS terminal applications in Java/Kotlin.
• Own end-to-end development of transaction flows including sales, refunds, reversals, and settlement.
• Integrate backend APIs and ensure reliable transaction synchronization.
• Add offline-first capabilities and handle edge cases in low-connectivity environments.
• Implement EMV chip, contactless (NFC), and card-present transaction flows.
• Integrate and maintain support for POS peripherals (card readers, pin pads, printers, scanners).
• Improve code quality through testing, reviews, CI/CD contributions, and production troubleshooting.

What you'll need

• Minimum of 5+ years of experience in Android app development.
• Degree in Computer Science, Engineering, or related subject.
• Strong expertise in Android native development (Kotlin/Java).
• Experience building or maintaining POS terminal applications.
• Solid understanding of EMV standards and card-present transaction flows.
• Experience integrating payment SDKs and POS hardware peripherals.
• Familiarity with REST APIs, WebSockets, and background sync mechanisms.
• Experience with local storage solutions (Room, SQLite).
• Strong debugging and performance optimization skills.
• Understanding of secure coding practices in financial systems.
• Ability to work in a fast-paced, high-ownership environment.
• Experience working in fintech or high-transaction environments.
• Exposure to cross-platform frameworks (e.g., Flutter).
• Experience working with Android-based embedded POS terminals.

Details

• Remote work indicated by “#LI-Remote”.