roofstacks

Business Analyst (Card Payment Systems)

Istanbul, Turkey (city only)

Hybrid · Full-time

First seen by offpeak October 22, 2026

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At Roofstacks, we are driving the next generation of digital finance. We're on the lookout for a Business Analyst who brings deep knowledge in card payment systems and thrives in a cross-functional, high-impact role.
If you’re experienced in card lifecycle management, regulatory compliance, and end-to-end product delivery across debit, credit, and prepaid cards—let’s talk. 💼 Key Responsibilities
You will play a critical role in managing processes across all card types—Bireysel, Ticari, Ek/Sanal/Dijital—and will work closely with stakeholders across Product, Technology, Risk, and Operations.
Your key responsibilities include: (may vary depending on your team)
- Managing card application journeys across all channels (Branch, IVR, Digital) - Integrations with KKB/LKS, Decision Support, Analytics Solutions and other decisioning tools - Oversight of card lifecycle operations: new issuance, renewal, closure, limits, fraud - Supporting fee & commission configurations, statement management, posting, rediscount - Handling BIN/RANGE, EMV scripting, PIN management, encryption/key management - Managing POS onboarding, device vendors, parameter distributions, RKL flows - Driving interchange & clearing processes (Visa Base II, Mastercard IPM, BKM YTH/BTH) - Working on 3DS 2.x, ACS, GO authentication systems, API integrations, and open banking - Ensuring regulatory compliance (BDDK, PCI-DSS, KVKK) and adapting to scheme updates 🎯 What We’re Looking For
- Minimum 4 years of hands-on experience in card payment systems - Bachelor’s degree in Engineering or related technical discipline - Experience with banking/payment systems, POS infrastructures, and merchant onboarding - Strong understanding of ISO 8583, EMV transaction flow, 3DS, tokenization, and fraud detection - Familiarity with Visa, Mastercard, BKM, and their operational and reporting structures - Strong analytical and documentation skills with a proactive, solution-oriented mindset - Fluency in Turkish; professional working proficiency in English is a strong plus ⭐ Nice-to-Have Skills
- EMV Scripting & PIN encryption knowledge - API testing, system integration & test coordination experience - Open banking, KVKK, GIB/IKS integration awareness - Previous experience in launching or migrating card products - Knowledge of settlement/accounting impacts of clearing processes