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Mellon Group is a leading Greek multinational organization providing specialized fintech and customer experience solutions to major financial institutions and large enterprises. Headquartered in Athens, Greece, and employing over 9,000 professionals across 13 countries.
The Group delivers innovative technological solutions and value-added services to organizations with high consumer transaction volumes, including retail banks, telecommunications providers, public utilities, and large private companies.
Mellon Systems and Services d.o.o., a newly established subsidiary of Mellon Technologies, operates in Slovenia as a member of the Mellon Group of Companies, further expanding the Group’s regional presence and service capabilities.
Mellon Systems and Services d.o.o seeks to hire an ATM Software Specialist to join our FinTech team and work with leading banks across Southeastern Europe!
Responsibilities
- Develop & support ATM applications (NDC, KAL/K3A, ProCash).
- Integrate ATM solutions with EMV and ISO8583 systems
- Ensure smooth ATM operations by monitoring performance and resolving incidents promptly
- Perform software upgrades, patches, and testing to ensure system reliability and security
- Support project implementation, including piloting and rollout of ATM software solutions
- Troubleshoot complex technical issues, providing timely resolution and root-cause analysis
- Collaborate with internal team and clients to deliver customized ATM functionalities
- Ensure compliance with industry standards, security protocols, and client requirements
Requirements
- Bachelor’s degree in Computer Science, Information Technology, or a related field
- 2+ years of experience in ATM software development, integration, or support within banking or fintech environments
- Knowledge of EMV standards, ATM applications, and transaction processing systems
- Strong troubleshooting and problem-solving mindset
- Fluency in English (written and spoken)
- Ability to work both independently and collaboratively in a team environment
Benefits
- Competitive package & benefits
- Opportunity to participate in international banking projects
- Continuous training & professional growth
Join Us:
If you’re passionate about technology and driven to implement innovative banking solutions, we’d be delighted to hear from you.
Ready to apply?
Join Mellon Group and take your career to the next level!
Application takes less than 5 minutes

