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Hydra Group

API integrations

API integration services that connect the systems you already run.

Custom applications are more valuable when they talk to payments, CRMs, ecommerce, logistics, and accounting. We design those connections as part of the software — not as a pile of native plugins you hope will keep working.

01

Operational in <1 Week

Not a workshop pack. Not months of planning.

We ship the first version of the workflow that matters most — login, the job that hurts today, and something your team can actually use.

Your first version is live and operational in less than a week. Then we keep building on software that's already in use.

02

10+ years maintaining and growing apps.

That experience is the knowledge behind a first version you can use — and behind every version after it. We know how to keep software stable, extend it, and change it when the business does.

When generic software stops fitting.

The same customer, three times

Sales, finance, and support each hold a version of the truth. None of them is complete.

Exports are the integration

CSV files and a weekly ritual are not an architecture. They fail when someone is on leave.

A plugin did the talking

Until it was abandoned, rate-limited, or unable to express your actual fields.

New software made isolation worse

A custom app that cannot send or receive data becomes another silo you have to staff.

Capability

Built around the workflow, not a template.

Connections designed as part of the application: authentication, mapping, and what happens when the other system is down.

Payments, CRMs, stores, logistics, and accounting — if it has a documented API, we treat it as a system of record or a consumer, not a plugin hope.

Deals, contacts, and activity staying in sync with finance, a portal, or ecommerce. The customer is not retyped.

Orders, stock, and payments agreeing with the rest of the stack after checkout — not a CSV on Monday.

Charges, refunds, and failures written back to the order or invoice. Payment is not finished when the widget says OK.

Invoices, payments, and customers mapped to the books. Finance is not a weekly export ritual.

Internal balances, movements, and reconciliations from the banks you already use — when those institutions expose an API or a documented feed. This is operations software, not a core-banking replacement.

Rates, labels, and tracking as data in the product. Fulfilment status is not a portal someone else owns that you never open.

Events you emit and events you consume, with signatures and retries. A webhook is an interface, not a fire-and-forget URL.

Every field has an owner. Integrations fail when two products both believe they are the source of truth.

APIs time out. Operators see what failed, what will retry, and what needs a person — not a silent gap in the data.

Your own software exposing what other systems should call. Integrations are easier when you are not scraping your own UI.

Keys, OAuth, and scopes treated as production concerns. A connection without an owner is an incident waiting.

Approach

How we approach the work.

01

Decide the system of record

Every field needs an owner. Integrations fail when two products both believe they are the source of truth.

02

Build for failure

APIs time out. We plan retries, logs, and what the operator sees when a payment or shipment update does not arrive.

03

Keep it maintainable

Integrations change when vendors change. Maintenance plans exist so those updates are not an emergency project every time.

Questions

Can you connect our existing CRM, store, or banks?

If it has a documented API, usually yes — payments, accounting, a CRM, webhooks, or bank feeds for internal balances. The estimate includes mapping, authentication, and what happens when the remote system is down.

Do you only integrate software you built?

Most integrations sit around a custom application we are building or maintaining. Connecting two unmodified SaaS products with no custom software in between is a different, narrower brief — ask if that is all you need.

Is this the same as Zapier?

No. Lightweight automation tools are fine for simple handoffs. We build integrations that are part of the application: permissions, data integrity, and behaviour you can support.

Tell us what the software needs to do.

Share the workflow, the current tools, and the outcome you need. We will come back with a scoped project estimate — not a generic package.