Interest & Product Logic Specialist
HybridMálaga, Andalusia, Spain
Job Summary
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, then verify and test the delivered configurations to ensure mathematical and financial correctness. Collaborate with finance, compliance, and product teams to validate supplier deliveries against business intent while investigating discrepancies in interest calculations or fee postings. Provide hands-on internal support to colleagues across the business regarding questions about interest, fees, and product behaviour. Join a small, close-knit team building a modern, cloud-native core ledger platform in Málaga.
Required Qualifications
- 4+ years of experience in a financial, analytical, or product role within financial services, lending, or payments
- Strong understanding of interest calculation methodologies (e.g. effective interest rate, simple interest, compound interest, XIRR)
- Experience writing detailed financial business rules and specifications for systems built by others
- Solid grasp of product structures in consumer credit, BNPL, or instalment lending
- Ability to work with complex financial specifications and verify that delivered systems implement them correctly
- BSc or MSc in Computer Science, Software Engineering, or equivalent practical experience
- Fluent English
Desired Qualifications
- Knowledge of Nordic or European consumer credit regulation (e.g. Consumer Credit Directive)
- Experience with configuration-driven financial product frameworks delivered by suppliers
- Background in actuarial science, quantitative finance, or financial mathematics
- Familiarity with accounting principles as they relate to interest and fee recognition
- Exceptional analytical rigour — comfortable with mathematical precision and financial logic
- Service-minded and approachable — enjoys helping colleagues understand interest, fee, and product logic
- Strong bridge-builder between finance/business language and supplier requirements
- Thorough documenter — understands that correctness must be explainable and auditable
- Curious and proactive in challenging assumptions and validating requirements
- Collaborative, with an ability to work effectively with business stakeholders and external suppliers
- Swedish language
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