ppWe are looking for a specialist who combines financial know-how with strong analytical skills to join our Core Ledger team. Our platform contain core ledger systems both fully developed internaly and developed and delivered by external suppliers. As an Interest Product Logic Specialist, you will define and document the business rules behind interest, fees, and product configurations, and verify and test that what our internal- and external suppliers deliver matches our requirements and works correctly. A significant part of this role is providing hands‑on internal support to colleagues across the business who have questions about interest, fees, and product behaviour — this is something all specialists in the team spend a lot of time on. Getting this right is essential — it directly affects how accurate and competitive our financial products are. You will join a small, close-knit team and have a great opportunity to make a direct impact early on and help shape it as it grows. /p h3Key Responsibilities /h3 ul liDefine and document detailed requirements for interest calculation logic, accrual rules, and fee structures, to be delivered by external suppliers /li liTranslate financial product requirements from business and product teams into precise specifications for our suppliers /li liVerify and test the product configuration delivered by suppliers, ensuring it behaves correctly for all financial instruments /li liEnsure the mathematical and financial correctness of calculation logic delivered, including edge cases and regulatory requirements /li liCollaborate with finance, compliance,



and product teams to validate that supplier deliveries meet business intent /li liSupport audit and regulatory reporting by ensuring calculation logic is transparent, traceable, and well‑documented /li liInvestigate and resolve discrepancies in interest calculations, fee postings, or product behaviour, working with suppliers when needed /li liDefine and execute test cases for financial calculation logic, including boundary and regression tests /li liProvide hands‑on internal support to other teams (finance, customer service, operations, and others) on questions about interest, fees, and product behaviour — this is a significant and ongoing part of the role /li /ul h3Qualifications And Experience /h3 h3Desired Skills /h3 ul li4+ years of experience in a financial, analytical, or product role within financial services, lending, or payments /li liStrong understanding of interest calculation methodologies (e.g. effective interest rate, simple interest, compound interest, XIRR) /li liExperience writing detailed financial business rules and specifications for systems built by others /li liSolid grasp of product structures in consumer credit, BNPL, or instalment lending /li liAbility to work with complex financial specifications and verify that delivered systems implement them correctly /li /ul h3Nice to Have /h3 ul liKnowledge of Nordic or European consumer credit regulation (e.g. Consumer Credit Directive)



/li liExperience with configuration‑driven financial product frameworks delivered by suppliers /li liBackground in actuarial science, quantitative finance, or financial mathematics /li liFamiliarity with accounting principles as they relate to interest and fee recognition /li /ul h3Behaviours /h3 ul liExceptional analytical rigour — comfortable with mathematical precision and financial logic /li liService‑minded and approachable — enjoys helping colleagues understand interest, fee, and product logic /li liStrong bridge‑builder between finance/business language and supplier requirements /li liThorough documenter — understands that correctness must be explainable and auditable /li liCurious and proactive in challenging assumptions and validating requirements /li liCollaborative, with an ability to work effectively with business stakeholders and external suppliers /li /ul h3Education /h3 pBSc or MSc in Computer Science, Software Engineering, or equivalent practical experience. /p h3Languages /h3 pFluent English is required for this role. Swedish language is a plus. /p h3What We Offer /h3 ul liA key role in building and shaping a modern, cloud‑native core ledger platform /li liA collaborative, cross‑functional team environment with short decision paths /li liCompetitive salary and benefits package /li liFlexible working arrangements with hybrid options /li liOpportunities for professional development and continuous learning /li liA chance to make a real impact in the fintech space across the Nordic market /li liModern office in central Málaga with a strong team culture /li /ul /p #J-18808-Ljbffr

📌 Interest & Product Logic Specialist (Málaga)
🏢 TF Bank AB (publ)
📍 Málaga