FinTech Interest & Product Logic Specialist

TF Bank AB; Borås kommun; On-site; SEK 700,000 - 900,000; Full time

Benefits offered by this job

Hybrid work options

Professional development

Continuous learning

Central Borås office

Competitive salary

Job summary

TF Bank AB in Borås seeks an Interest & Product Logic Specialist who combines financial know-how with strong analytical skills. You will define and document business rules for interest, fees, and product configurations, and verify that supplier deliveries meet our requirements and work correctly.

You’ll provide hands-on internal support across finance, compliance, and product teams, help shape the core ledger platform, and test edge cases and regulatory requirements to ensure accurate,

Qualifications

• 4+ years of experience in a financial, analytical, audit (internal or external), 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, or experience auditing and validating such systems.
• 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

Finance/audit exp

Financial rules spec

BNPL/credit products

Financial specs validation

Education

BSc or MSc in related field

Job description

TF Bank AB in Borås seeks an Interest & Product Logic Specialist who combines financial know-how with strong analytical skills. You will define and document business rules for interest, fees, and product configurations, and verify that supplier deliveries meet our requirements and work correctly.

You’ll provide hands-on internal support across finance, compliance, and product teams, help shape the core ledger platform, and test edge cases and regulatory requirements to ensure accurate,