
LedgerlineMulti-currency payments platform
An event-driven payments core that replaces a straining monolith, migrated in stages while live transactions keep flowing.
Target outcomes
- 4×
- peak throughput headroom
- 99.95%
- availability objective
We design clean public and internal APIs, and we connect the systems you already rely on so that data flows once, correctly, without anyone re-typing it.
API Development & Integrations
What you receive
Integrations rarely fail on the happy path. They fail on rate limits, duplicated webhooks, partial outages and a vendor quietly changing a field. Our integrations are built for that reality, with idempotency, retries, reconciliation and alerts from the start.
If you are publishing an API, we treat it as a product: a contract written first in OpenAPI, consistent errors, sensible versioning and documentation developers can follow without emailing you.
REST, GraphQL and gRPC services with contract-first design and consistent conventions.
Salesforce, HubSpot, Stripe, Twilio, NetSuite, SAP, Shopify and most systems with an API.
Reliable delivery with signing, replay, retries and deduplication at both ends.
An integration layer that keeps vendors swappable, custom-built or on platforms like Workato.
OAuth 2.0 and OIDC, scoped keys, rate limiting and OWASP API Top 10 controls.
Interactive documentation, SDKs, sandboxes and change logs for the people using your API.
We map every system, owner, data flow and failure mode involved.
API contracts and data mappings are agreed in writing before implementation.
Contract tests, sandbox runs and fault injection prove behaviour under failure.
Reconciliation jobs and alerts catch drift early, with a versioning plan for change.
Tools and platforms
The things founders and leadership teams actually ask us, with honest answers. Anything else, we’re one message away.
Ask your own questionUsually. We can work through database views, file exchange or a thin adapter service, and we will flag any approach that creates long-term risk.
Book a free consultation. We’ll scope your project, pressure-test the plan and give you an honest estimate, with no commitment required.