Senior Software Engineer

COSMOTE GLOBAL SOLUTIONS NV

Luxembourg, Luxembourg, Luxembourg Hybrid contract

Posted: April 1, 2026

Job Description

COSMOTE Global Solutions, part of the OTE Group of Companies, is a leading ICT Systems Integrator delivering a comprehensive range of ICT Solutions and Services.

CGS specializes in Cloud, Data Centre operations, Networking, Cybersecurity, BI and Data Warehouse, Big Data, Service Desk, Proactive Monitoring, Operations and Support, Service Management, Project and Programme Management, and Professional Services.

Responsibilities:

• Analyse requirements, systems and integration interfaces, including the domain of Swift message processing.

• Design, development, testing and deployment of message flows, including the area of
• Swift message processing (MT/MX), deployed on IBM AppConnect Enterprise (ACE) and IBM
• Transformation Extender (ITX).
• Troubleshooting, rootcause analysis and resolution of production issues with ESB services.
• Document integration solution design, configuration and deployment procedures, creating user guides and technical documentation for developers and platform engineers.
• Provide support and maintenance of IBM App Connect Enterprise (ACE), IBM
• Transformation Extender (ITX), IBM MQ Series and WSO2 Microintegrator deployed on Linux OS and IBM MQ.
• Raise and coordinate resolution of issues with middleware provider support teams.
• Participate to the failover and disaster recovery tests.
• Automation of certain manual process using Ansible and Azure DevOps pipelines.

Requirements:
• Bachelor in IT or a related field
• 5+ years of experience in a related field
• Proven Experience with:
• IBM AppConnect Enterprise (ACE)
• IBM Tranformation Extender (ITX)
• IBM MQ
• WSO2 MicroIntegrator
• SWIFT message processing and formats (MT and MX formats)
• Data transformation using builtin transformation capabilities on ESB platforms, XSLT or eSQL
• Message queuing systems, protocols, and standards (e.g., MQ, SFTP, SOAP, REST)
• Java programming language
• Authentication and authorization protocols
• SQL

• Competence in:
• Analyze requirements, systems and interfaces to understand integration needs.
• Developing web services using the following standards:

• XML (XMLNS, XSD, XPATH, JAXB) / JSON (Swagger)
• Web Services (SOAP, REST)
• WSSecurity
• TLS (for HTTPS and TCP/IP connections)
• JMS
• SAML & JWT tokens (for authentication)

• Develop integration interfaces using IBM ACE, IBM ITX, IBM MQ, including interface bespoke customizations.

• Handling SWIFT messages within application flows.
• Using message queuing systems, protocols, and standards (e.g., MQ, SFTP, SOAP, REST).
• Using best practices to design new message flows.
• Enforcing authentication and authorization in message flows using OAUTH, WSSecurity or certificate based authentication protocols.

• Troubleshooting IBM ACE, IBM ITX, IBM MQ Series and WSO2 MicroIntegrator.

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