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. /ph3Key Responsibilities /h3ulliDefine and document detailed requirements for interest calculation logic, accrual rules, and fee structures, to be delivered by external suppliers /liliTranslate financial product requirements from business and product teams into precise specifications for our suppliers /liliVerify and test the product configuration delivered by suppliers, ensuring it behaves correctly for all financial instruments /liliEnsure the mathematical and financial correctness of calculation logic delivered, including edge cases and regulatory requirements /liliCollaborate with finance, compliance,



and product teams to validate that supplier deliveries meet business intent /liliSupport audit and regulatory reporting by ensuring calculation logic is transparent, traceable, and well‑documented /liliInvestigate and resolve discrepancies in interest calculations, fee postings, or product behaviour, working with suppliers when needed /liliDefine and execute test cases for financial calculation logic, including boundary and regression tests /liliProvide 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 /ulh3Qualifications and Experience /h3h3Desired Skills /h3ulli4+ years of experience in a financial, analytical, or product role within financial services, lending, or payments /liliStrong understanding of interest calculation methodologies (e.g. effective interest rate, simple interest, compound interest, XIRR) /liliExperience writing detailed financial business rules and specifications for systems built by others /liliSolid grasp of product structures in consumer credit, BNPL, or instalment lending /liliAbility to work with complex financial specifications and verify that delivered systems implement them correctly /li /ulh3Nice to Have /h3ulliKnowledge of Nordic or European consumer credit regulation (e.g. Consumer Credit Directive)



/liliExperience with configuration-driven financial product frameworks delivered by suppliers /liliBackground in actuarial science, quantitative finance, or financial mathematics /liliFamiliarity with accounting principles as they relate to interest and fee recognition /li /ulh3Behaviours /h3ulliExceptional analytical rigour — comfortable with mathematical precision and financial logic /liliService‑minded and approachable — enjoys helping colleagues understand interest, fee, and product logic /liliStrong bridge‑builder between finance/business language and supplier requirements /liliThorough documenter — understands that correctness must be explainable and auditable /liliCurious and proactive in challenging assumptions and validating requirements /liliCollaborative, with an ability to work effectively with business stakeholders and external suppliers /li /ulh3Education /h3pBSc or MSc in Computer Science, Software Engineering, or equivalent practical experience. /ph3Languages /h3pFluent English is required for this role. Swedish language is a plus. /ph3What We Offer /h3ulliA key role in building and shaping a modern, cloud‑native core ledger platform /liliA collaborative, cross‑functional team environment with short decision paths /liliCompetitive salary and benefits package /liliFlexible working arrangements with hybrid options /liliOpportunities for professional development and continuous learning /liliA chance to make a real impact in the fintech space across the Nordic market /liliModern office in central Málaga with a strong team culture /li /ul /p #J-18808-Ljbffr

📌 Interest & Product Logic Specialist · Málaga ·
🏢 TF Bank
📍 Málaga