API integrations and automation

ByteWave delivers API integrations for business: connecting e-commerce with accounting, ERP with marketplaces, CRM with marketing automation, warehouse with logistics. REST, GraphQL, SOAP, EDI, e-invoicing. Automation of repetitive processes, eliminating manual data re-entry. Single integration from 1-2 weeks, advanced multi-system deployment in 2-3 months.

Start a project

app.tsx

12345 678910 1112131415

import { useState } from 'react';
import { api } from './services';

export default function Dashboard() {
  const [data, setData] = useState(null);

  const fetchData = async () => {
    const res = await api.get('/analytics');
    setData(res.data);
  };

  return (
    <div className="container">
      <Chart data={data} />
    </div>
  );
}

What we build

Solutions tailored to the business

E-commerce integrations

Synchronizing your store (WooCommerce, Shopify, Magento, PrestaShop) with marketplaces (Amazon, eBay), couriers (DHL, UPS, DPD), payment gateways (Stripe, PayPal), accounting platforms.

Accounting and e-invoicing integrations

Automated invoice generation, contractor synchronization, integration with national e-invoicing systems (KSeF in Poland - mandatory from 2026). Sending, receiving, validation, archiving compliant with tax law.

Process automation

Eliminating manual tasks: order import, stock updates, report generation, email dispatch, notifications. Workflows in n8n, Zapier, Make, or dedicated Python/Node.js scripts with monitoring.

Custom APIs and microservices

Designing and implementing custom APIs (REST, GraphQL) for company applications. Microservices with module isolation, event queues (RabbitMQ, Redis), API gateway with OAuth/JWT authorization. Full OpenAPI/Swagger documentation.

Technologies

Tech stack that scales

Protocols and standards

REST API

Industry standard for most integrations. JSON, Bearer/OAuth authorization, OpenAPI documentation. Easy to test, good tooling support.

GraphQL

Flexible queries, ideal when client needs varied data scopes. Apollo, Hasura. Single endpoint, type-safe schemas.

SOAP / XML

Older enterprise systems (banks, insurance, public institutions). WSDL, certificates, electronic signatures. Also supported.

Webhooks

Real-time event notifications. Event-driven integration instead of polling. Retry logic, signature verification, idempotency.

Popular integrations

E-invoicing (KSeF, PEPPOL)

Mandatory in many EU countries. Sending, receiving, validating invoices. We have a custom KSeF plugin for WooCommerce, also integrate with other platforms.

Stripe / PayPal / local gateways

Online payment gateways. Subscriptions, one-time payments, cards, Apple Pay, Google Pay. Webhooks, refunds, dispute handling.

Marketplaces (Amazon, eBay, etc.)

Marketplace APIs for multi-channel stores. Synchronization of listings, orders, stock, reviews. Automated listing and delisting.

CRM (HubSpot / Pipedrive / Salesforce)

Synchronization of leads, contacts, deals. Webhooks on events (new lead, status change), integration with marketing automation.

Infrastructure and security

OAuth 2.0 / JWT

API authorization standard. Refresh tokens, scope management, expiration. Secure for web and mobile applications.

API Gateway (AWS / Kong)

Central entry point, rate limiting, throttling, monitoring. Protection against abuse, logging of all calls.

Queues (RabbitMQ / Redis / SQS)

Asynchronous processing. Reliability with high volumes, automatic retry, dead letter queues.

Monitoring and logging

Sentry, Grafana, CloudWatch. API call logging, error alerts, dashboards with latency and throughput metrics.

How we work

From idea to deployment

Discovery

Analysis of needs, business and technical requirements. We define goals and project scope.

Design

UX/UI design, system architecture, prototyping. We visualize the solution before coding.

Development

Iterative product building with regular demos. Agile, transparent process, constant contact.

Deployment

Testing, deployment, user training. Technical support and growth after launch.

Back to Custom software — part of

Frequently asked questions

Questions? We have answers

How much does an API integration cost?

Single integration (e.g., WooCommerce with marketplace or store with couriers) starts from 1,000-2,200 EUR. Advanced multi-system deployment (e-commerce + accounting + warehouse + marketplace + e-invoicing) is 5,500-11,000 EUR. Custom API with microservices: 7,000-22,000 EUR. Free analysis and quote within 48h.

How long does integration deployment take?

Single integration - 1-3 weeks. Multi-system with testing and documentation - 4-8 weeks. Custom API with microservices and new backend - 2-4 months. First working version usually within 1-2 weeks.

What if the external system has no API?

We have several solutions: (1) File import adapters (CSV, XML, Excel) via FTP/email. (2) RPA - automation through UI for legacy systems without API (UiPath, Selenium). (3) Intermediate databases - synchronization through shared database. (4) Web scraping (where terms allow). We advise the best solution for the specific case.

Will you implement e-invoicing for my company?

Yes. We have a custom KSeF plugin for WooCommerce (mandatory in Poland from 2026), also integrate with other platforms: Shopify, PrestaShop, Magento, custom systems. Full support: registration, sending invoices, receiving from contractors, validation, archiving, reporting.

How do you ensure integration reliability?

Standard practice: retry logic with exponential backoff, idempotency keys, event queues, 24/7 monitoring, error alerts. Circuit breaker mode so external API outage doesn't halt the entire system. Logging of every call - easy debug. SLA with guaranteed response time optional.

Have a project idea?

Let's talk about how we can make it happen.

Get in touch