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Leventec

SaaS & Software

Systems that speak to each other.

We design and build integrations between your applications and third-party platforms — payments, CRMs, ERPs, messaging, AI providers — with proper authentication, error handling, monitoring and documentation.

API integration hub showing connection health and request logs — concept preview with sample data
Concept preview

Overview

What API & Third-Party Integrations can do for your business

Modern businesses run on many connected services: payment providers, CRMs, ERPs, messaging platforms, marketplaces and AI models. When those connections are unreliable, data drifts out of sync, orders are missed and teams lose trust in their systems.

We design integrations that are secure, observable and resilient. That means proper authentication and secret management, webhooks and event-driven sync, retries and idempotency to prevent duplicates, rate-limit handling and alerts when something fails. We also build and document APIs for your own product so partners and customers can integrate with you.

Is this right for you? Common signs:

  • Data is out of sync between systems
  • Integrations fail without anyone noticing
  • Partners want to connect to your platform
  • You're adding payments or messaging

API & Third-Party Integrations

What we deliver

  • REST and GraphQL API development
  • Third-party API integration
  • Webhooks and event-driven sync
  • Authentication, keys and security
  • Rate limiting, retries and monitoring
  • API documentation

Use cases

API & Third-Party Integrations: use cases

01

Payments

Connect checkout, invoicing and accounting systems.

02

Data sync

Keep customer and order data consistent across platforms.

03

Partner APIs

Expose your services securely to partners and customers.

Process

How we deliver it

  1. 01

    Integration design

    We map data flows, ownership and failure scenarios.

  2. 02

    Prototype

    We test third-party APIs early to uncover limitations.

  3. 03

    Build

    We implement secure, resilient integrations with logging.

  4. 04

    Document & monitor

    We document endpoints and monitor health in production.

FAQ

API & Third-Party Integrations: questions answered

What if the third-party API is poorly documented?

We prototype early to uncover limitations before committing to a design.

How do you handle failures?

With retries, dead-letter queues, alerting and idempotent processing where appropriate.

Can you build an API for our product?

Yes, including documentation and developer onboarding.

Related

Explore related services

All services

Have a project in mind?

Tell us what you want to build. We'll reply with honest next steps — whether that's a quick automation, a SaaS product or a playable prototype.