Senior Android Payments Developer

About the role

We are looking for a Senior Android Payments Developer to lead the creation of card‑acceptance applications on POS terminals. The role is based on‑site in Nenagh, Ireland and will be pivotal in modernising legacy payment code while ensuring certification with major card schemes.

Key responsibilities

• Design and implement clean, maintainable Android applications (Java/Kotlin) for embedded POS devices, including PAX terminals.
• Integrate and validate drivers and SDKs for card readers, PIN pads, NFC/contactless, EMV, printers and other peripherals.
• Develop payment flows (authorisation, settlement, reversal, offline) and handle EMV, contactless and magnetic‑stripe scenarios.
• Prepare certification artefacts, run test suites and coordinate with Visa, Mastercard, Amex and other acquirers.
• Migrate legacy payment code to modular, service‑oriented architectures while preserving backward compatibility.
• Apply secure coding practices, support PCI‑PTS and EMV kernel requirements, and work with security teams on key management.
• Profile, optimise and add telemetry to improve performance, reliability and observability.
• Build and maintain CI/CD pipelines, automated regression tests and device‑farm executions.
• Lead root‑cause analysis for production incidents and mentor junior team members.

Required profile

• Senior‑level Android developer with extensive experience on POS/embedded devices.
• Strong background in payment processing, EMV standards and PCI compliance.
• Proven ability to work closely with QA, product and programme teams in a fast‑paced environment.

Required skills

• Android development (Java, Kotlin)
• PAX SDK and device‑specific APIs
• POS hardware integration (card readers, PIN pads, NFC, printers)
• EMV, contactless and magnetic‑stripe payment flows
• PCI‑PTS, secure coding and key management
• CI/CD tools, automated testing, device‑farm frameworks
• Performance profiling and telemetry implementation
• Git version control

What we offer

• Opportunity to lead a high‑impact legacy modernisation programme.
• Collaboration with global payment scheme partners.
• Competitive compensation and professional growth in a specialised fintech environment.