Java Developer - Smart POS & Digital Payments in Ireland (Freelance)

Posted 20 hours 17 minutes ago by Westhouse Consulting GmbH

Contract
Not Specified
Other
Limerick, Limerick, Ireland
Job Description

Java Developer - Smart POS & Digital Payments

General information
Reference: 172326
Location: 5 Days Limerick
Start: 24.02.2025 (ASAP)
Volume: Full time (100%)
Duration: 31.12.2025 + Option
Languages: English

Tasks:

  • POS Terminal Development & Card Payment Integration - Contactless, mobile, and chip-card transactions
  • Digital Payment Processing - Expertise in Apple Pay, Google Pay, NFC & QR code transactions
  • Omnichannel Payment Solutions - Development for retail POS, E-commerce, and mobile platforms
  • Security & Compliance - Implementation of PCI DSS, PSD2, Tokenization, and encryption standards
  • Custom API & SDK Development - Tailored Java-based solutions for seamless integration into POS systems, mobile apps, and E-commerce platforms

Tech Stack - Java as Core Language

  • Programming Languages: Java (main), Kotlin, Swift, JavaScript, TypeScript, Python
  • Java Frameworks: Spring Boot, Quarkus, Jakarta EE, Micronaut
  • Mobile Development: Android (Java/Kotlin), Flutter
  • Cloud & Infrastructure: AWS, Google Cloud, Microsoft Azure, Docker, Kubernetes
  • Payment Technologies: EMV, NFC, Tokenization, PCI DSS Compliance, HSM Integration
  • APIs & Integrations: REST, GraphQL, WebSockets, ISO 8583 (financial transactions)
  • Databases: PostgreSQL, MySQL, MongoDB, Firebase