BASE24 Classic Developer (Hybrid, Athens)

We’re hiring: ACI BASE24 Classic Developer / Consultant | Athens, Greece

Wisesystems is looking for an experienced ACI BASE24 Classic Developer / Consultant to support a major payments client in Athens as part of a long-term engagement.

You’ll join an experienced technology team working on business-critical payment processing infrastructure, supporting the development, configuration and evolution of ACI BASE24 Classic running on HPE NonStop (Tandem).

📍 Location: Athens, Greece, North Suburbs (please only apply if you are based and can work here)

🏢 Working model: Hybrid, 2 days per week on-site

📄 Engagement: Long-term contract

What you’ll be doing

• Be our key person on the ground, building strong relationships and collaborating with our offshore technology partner team to achieve the best client outcome
• Develop and configure solutions on ACI BASE24 Classic
• Translate business and technical requirements into solution designs and code
• Support the full lifecycle from analysis and development through testing and production deployment
• Configure and support ATM, POS and interchange transaction processing
• Troubleshoot complex application and transaction-processing issues
• Support platform maintenance, optimisation and upgrades
• Work within a collaborative payments technology environment supporting high-availability services

What we’re looking for

• Strong hands-on experience (8+ yrs) with ACI BASE24 Classic
• Solid experience with HPE NonStop / Tandem
• Experience with TACL, PATHWAY and FUP
• Development experience in TAL, COBOL85 and/or C/C++
• Good understanding of ISO 8583, payment transaction processing and card-scheme integrations
• Knowledge of Visa, Mastercard and EMV processing is highly desirable
• Strong analytical and troubleshooting skills
• Fluent English
• Greek and/or Italian would be an advantage

This is particularly suitable for an experienced BASE24 professional looking for a long-term engagement in a major European payments environment.

Interested?

If BASE24 Classic is your world, we’d be very interested in speaking with you.

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