Fintech Interest & Product Logic Specialist

TF Bank AB; Málaga; Hybrid; EUR 60,000 - 86,000; Full time

Benefits offered by this job

Hybrid work options

Modern office in Málaga

Competitive salary

Job summary

TF Bank AB is seeking an Interest & Product Logic Specialist to join our Core Ledger team in Málaga. You will define and document business rules behind interest, fees, and product configurations, and verify supplier deployments against requirements.

The role requires strong analytical skills, knowledge of financial calculation methods, and the ability to support colleagues across finance, compliance, and product teams while ensuring accuracy and regulatory alignment.

Qualifications

• 4+ years in financial, analytical, or product roles within financial services.
• Solid understanding of interest calculation methods (e.g., effective rate, simple interest, compound interest, XIRR).
• Experience writing detailed financial business rules and specifications for systems built by others.
• Understanding of consumer credit, BNPL, or instalment lending product structures.
• Ability to translate business requirements into precise supplier specifications.

Responsibilities

• Define and document detailed requirements for interest calculation logic, accrual rules, and fee structures to be delivered by external suppliers.
• Translate financial product requirements from business and product teams into precise specifications for our suppliers.
• Verify and test the product configuration delivered by suppliers, ensuring it behaves correctly for all financial instruments.
• Ensure the mathematical and financial correctness of calculation logic delivered, including edge cases and regulatory requirements.
• Collaborate with finance, compliance, and product teams to validate that supplier deliveries meet business intent.
• Support audit and regulatory reporting by ensuring calculation logic is transparent, traceable, and well‑documented.
• Investigate and resolve discrepancies in interest calculations, fee postings, or product behaviour, working with suppliers when needed.
• Define and execute test cases for financial calculation logic, including boundary and regression tests.
• Provide hands‑on internal support to other teams on questions about interest, fees, and product behaviour.

Job description

TF Bank AB is seeking an Interest & Product Logic Specialist to join our Core Ledger team in Málaga. You will define and document business rules behind interest, fees, and product configurations, and verify supplier deployments against requirements.

The role requires strong analytical skills, knowledge of financial calculation methods, and the ability to support colleagues across finance, compliance, and product teams while ensuring accuracy and regulatory alignment.