Westhouse is one of the leading international recruitment agencies for the procurement of highly qualified experts in fields such as IT life cycle management, SAP, engineering, commerce and specialist consultancy.
For our client we are currently looking for a
Java Backend Developer (m/f/d)
General information Reference: 172129 Location: Limerick (4 Days/Week) and Remote Start: 01.01.2025 (ASAP) Volume: Full time (100%) Duration: 31.12.2025 + Option Languages: English
Role Overview:
As a Senior Java Backend Developer, you will be a key member of the team working on the Internet Payment Gateway (IPG) system. This enterprise-scale platform processes over 1000 transactions per second, and your focus will be on developing robust Back End solutions that ensure high performance, scalability, availability, and resilience. You will also be involved in implementing features to support industry standards such as Nexo and future alternative payment methods.
Primary Responsibilities:
- Develop and maintain Back End systems for the IPG to process high volumes of transactions securely and efficiently.
- Ensure the system meets non-functional requirements for performance, scalability, availability, and overall system resilience.
- Design, implement, and optimize Back End services and APIs in Java to support payment processing.
- Collaborate with cross-functional teams to integrate the Back End systems with other components of the payment gateway.
- Contribute to the adoption of Nexo payment standards and future-proof the platform for alternative payment methods.
- Write high-quality, maintainable, and scalable code with a focus on performance and security.
- Troubleshoot and resolve complex Back End system issues, ensuring minimal downtime and maximum system availability.
- Participate in code reviews, providing feedback and ensuring adherence to best practices.
- Continuously monitor system performance and optimize Back End services to handle increasing transaction loads.
Required Skills and Experience:
- Experience:
- Minimum 5 years of experience as a Java Backend Developer, ideally in a high-transaction, enterprise-scale environment.
- Strong experience with Back End development using Java and associated technologies (Spring, Hibernate, etc.).
- Technical Knowledge:
- Solid understanding of non-functional requirements such as scalability, availability, and performance.
- Familiarity with payment gateway systems, APIs, and protocols.
- Experience with microservices architecture and designing scalable Back End systems.
- Payment Standards:
- Experience or interest in implementing industry standards such as Nexo or other payment protocols.
- Problem-Solving & Collaboration:
- Ability to troubleshoot complex Back End issues and collaborate with cross-functional teams to implement solutions.
- Strong communication skills and the ability to work well in a team-oriented, agile environment.
Interested? We look forward to receiving your application documents in electronic form.
Your Contact: Tobias Gollmann
