01
Make the requirement testable.
Turn source text, technical standards, and deadlines into explicit product decisions.
Open Finance software.
Focused integrations, operational tools, and compliance systems for the standards shaping open finance.
A second wave, not an extension of the first.
FIDA extends open-banking-style data-sharing obligations from payment accounts to a much wider set of financial products — savings, investments, insurance, mortgages — while PSD3 rewrites the payment-services rulebook PSD2 established, meaning banks and fintechs that already built PSD2 open-banking APIs now face a second, broader wave of connectivity requirements on a different timeline and a different data scope.
Reusing PSD2-era API infrastructure without re-architecting it is a real trap: FIDA's data-sharing scheme, permission model and dispute-resolution obligations don't map cleanly onto existing PSD2 consent flows, so the integration work is closer to building a second, parallel access layer than extending the first one — with its own consent UX, scope model and financial-data-sharing scheme membership to account for.
Map the domain through concrete systems.
A delivery path your team can inspect.
Open Finance should end in a system people can operate, not a document that creates another translation step.
02
Fit the systems already in place.
Map owners, data sources, approvals, and failure paths before choosing the software shape.
03
Ship evidence with the feature.
Include the operational trail, documentation, and maintainable architecture the requirement demands.
Start with the system you have.
If open finance software is on your roadmap, describe what you run today and where the requirement gets stuck. An engineer will answer with a concrete first move.