Senior POS Mobile Engineer

Stack

Responsibilities

• ▹Design, implement and maintain Android-based POS terminal applications (Java/Kotlin)
• ▹Own end-to-end development of key transaction flows (sales, refunds, reversals, settlement)
• ▹Collaborate with backend teams to integrate APIs and ensure reliable transaction synchronization
• ▹Implement offline-first capabilities and handle edge cases in low-connectivity environments
• ▹Integrate EMV chip, contactless (NFC) and card-present transaction flows
• ▹Work with encryption standards, key management processes and secure payment SDKs
• ▹Ensure compliance with payment security best practices
• ▹Troubleshoot and resolve transaction-related issues in production
• ▹Integrate and maintain support for POS peripherals (card readers, pin pads, printers, scanners)
• ▹Work with OEM SDKs for Android-based POS terminals
• ▹Handle Bluetooth, USB and embedded hardware communication layers
• ▹Write clean, maintainable, testable code following established architecture patterns
• ▹Participate in code reviews and provide constructive feedback
• ▹Contribute to improving CI/CD pipelines and release processes
• ▹Mentor mid-level engineers and support onboarding of new team members

Requirements

• ▹5+ years of experience in Android app development
• ▹A degree in Computer Science, Engineering or a 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 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
• ▹Experience working in fintech or high-transaction environments

Soft skills

About the company

Moniepoint is Africa's all-in-one financial platform, helping 20 million businesses and individuals access payments, banking, credit and cross-border tools each month; as Nigeria's largest merchant acquirer it processes over $250 billion in digital payment transaction value annually.