API Development
APIs that power your apps and connect your systems
OmniLabs builds the backend APIs behind mobile apps, web platforms, and multi-tenant SaaS products, and the integrations that connect them to your existing systems, data, and AI models.
Discuss API developmentWhere the API layer holds products back
- 01
You’re launching a mobile app, web app, or SaaS product and need a secure, scalable backend API behind it.
- 02
Your platform serves multiple customers or organizations, and each tenant’s data, users, and permissions must stay strictly separated.
- 03
Core data is split across a CRM, an ERP, legacy databases, and SaaS tools that never fully stay in sync.
- 04
Older APIs are slow, poorly documented, or fragile, and every new feature or integration adds more risk.
Backend APIs, multi-tenant platforms, and integrations
Whether you’re building a new product or connecting existing ones, we design and build the API layer it depends on, from the first endpoint to production.
- Backend APIs for mobile apps, web apps, and customer portals
- Multi-tenant SaaS APIs with tenant isolation, per-tenant roles, and configuration
- Authentication, user management, and role-based access control
- REST endpoints and GraphQL schemas matched to how each client fetches data
- Integrations with your ERP, CRM, databases, payment providers, and third-party platforms
- Webhooks, real-time updates, and event-driven messaging
- Endpoints that let AI models and agents work with your data securely
- Modernization of legacy APIs, performance tuning, and complete documentation
What a well-built API layer gives you
A backend that grows with your app, from first users to many customers and tenants.
Full control over your data, business logic, and access rules, without lock-in to off-the-shelf backends.
One reliable source of truth shared across mobile, web, internal tools, partners, and AI features.
From product requirements to production API
Define what the API serves
Clarify the apps, users, tenants, and systems that will use the API and the data and actions each one needs.
Design the architecture and contract
Plan the data model, tenancy, endpoints or schemas, authentication, errors, and versioning before writing code.
Build and integrate
Implement the API and connect it to your apps, databases, and third-party services, keeping existing consumers compatible.
Secure, test, and launch
Validate access rules, tenant isolation, edge cases, and performance, then ship with documentation your team can rely on.
Questions about API development
Can you build the backend API for our mobile or web app?
Yes. We build the backend API your app runs on, including data models, business logic, authentication, file handling, notifications, and the endpoints your iOS, Android, or web clients call.
Do you build multi-tenant APIs for SaaS products?
Yes. We design multi-tenant APIs where each customer or organization has isolated data, its own users and roles, and its own configuration, enforced at both the API and database levels.
Can you integrate our existing systems as well?
Yes. We connect APIs to CRMs, ERPs, legacy databases, payment providers, and SaaS tools so data stays consistent across your platform.
Do you build REST or GraphQL APIs?
Both. REST suits predictable operations and broad compatibility, while GraphQL suits clients that need flexible queries across related data. We choose based on how your apps will use the API.
How long does an API project take?
It depends on the product scope, number of integrations, tenancy model, and compliance requirements. A focused API can take a few weeks, while a full SaaS backend takes longer. We provide a phased timeline once we understand the scope.
Build the API behind your next product
Tell us about the app, platform, or systems you’re building, and we’ll outline a phased plan for the API.
