Fintech Interest & Product Logic Specialist

Avarda Group; Borås kommun; Hybrid; SEK 700,000 - 900,000; Full time

Benefits offered by this job

Hybrid work arrangement

Competitive compensation and benefits

Professional development

Job summary

Avarda Group in Borås is seeking a skilled Interest & Product Logic Specialist to define and document business rules for interest, fees, and product configurations, and ensure supplier deliveries meet requirements. This role includes hands-on internal support across Finance, Compliance and Product teams.

You will verify calculation logic, develop test cases, and help shape a cloud-native core ledger platform in a collaborative, Nordic fintech environment with hybrid work.

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.

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 (finance, customer service, operations, and others) on questions about interest, fees, and product behaviour - this is a significant and ongoing part of the role

Skills

Financial analytics

Interest calculation

Specification writing

Product knowledge BNPL

Complex calculations verification

Education

BSc / MSc in Computer Science or Software Engineering

Job description

Avarda Group in Borås is seeking a skilled Interest & Product Logic Specialist to define and document business rules for interest, fees, and product configurations, and ensure supplier deliveries meet requirements. This role includes hands-on internal support across Finance, Compliance and Product teams.

You will verify calculation logic, develop test cases, and help shape a cloud-native core ledger platform in a collaborative, Nordic fintech environment with hybrid work.