Job Title: Senior POS Developer - Nenagh Basedandnbsp;Overview: Our client is seeking a Senior Android Payments Developer to lead the development of card acceptance applications on POS devices and play a key role in a Legacy modernisation programme. You will design and implement secure, high-performance Android software for payment terminals (including PAX devices), collaborate with QA, product and programme teams, and drive payment certification with major card schemes. This role is fully onsite in Nenagh, Co. Tipperary. Responsibilities:Android POS DevelopmentDesign and implement Android applications for POS terminals, delivering clean, maintainable Java/Kotlin code for Embedded Android/AOSP-based devices.Integrate with POS hardware: implement and validate drivers and SDK integrations for card readers, PIN pads, NFC/contactless, EMV readers, printers and peripherals (experience with PAX SDKs expected).Implement payment flows: authorisation, settlement, reversal and offline-capable flows; ensure correct handling of EMV, contactless and magnetic stripe scenarios.Certification andamp; CompliancePrepare artefacts, run test suites and coordinate payment certification activities with card schemes and acquirers (Visa, Mastercard, Amex).Address scheme audit findings and remediation promptly.Implement secure coding practices and support PCI and terminal security requirements (PCI PTS, EMV Kernel considerations).Liaise with security and HSM teams on key management interfaces.Legacy