Use case · Financial Services

Core banking API modernisation

Incremental decomposition of a legacy core behind versioned APIs and event streams, so new products and partners connect without a risky replacement.

The challenge

What organisations face

Decades-old core systems hold the authoritative ledger but expose few usable interfaces. Each new channel, open banking connection or embedded finance partnership requires bespoke integration work against batch files and proprietary protocols, making product launches slow, expensive and dependent on a shrinking pool of specialists who understand the legacy estate.

The solution

What VulcanTech engineers

VulcanTech would introduce an API and event layer in front of the core using the strangler pattern: change-data-capture streams account events, a versioned API gateway exposes products to channels and partners, and selected capabilities move into cloud-native services over time. Contract testing, observability and automated release pipelines keep each step reversible and controlled.

Expected outcomes

What changes for the business

  • Faster launch of products, channels and partner integrations
  • Reduced dependency on scarce legacy skills
  • Modernisation delivered in low-risk, reversible increments

Capabilities

Service lines involved

Free discovery session

Explore core banking API modernisation for your organisation

Tell us what you're building. You'll hear back from an engineer, not an inbox.

  1. 1We reply within one business day to set up a 30-minute call.
  2. 2A senior engineer — not a salesperson — walks through your problem.
  3. 3You get a scoped proposal with timeline and cost. No obligation.

New projects & sales

[email protected]

Existing clients & support

[email protected]

Tell us about your project

Takes about 2 minutes
What do you need help with?
Estimated budget
When do you want to start?

We reply within one business day.