"Business Logic outlives Infrastructure"
Core (a product of Quatrain) is a modular TypeScript framework designed to accelerate business application development. Built upon a powerful Adapter Pattern, it decouples your core business logic from the underlying infrastructure, allowing you to deploy 100% on-premise with standard open-source blocks, leverage modern Backend as a Service (BaaS) platforms (like Supabase and Firebase), or run a hybrid architecture.
- BaaS & On-Premise Synergy: Build modern cloud-native apps leveraging managed services like Firebase/Supabase, or target strict data-sovereign environments using traditional self-hosted infrastructure (PostgreSQL, SQLite, S3, OIDC/OAuth, RabbitMQ). The exact same codebase runs in both worlds.
- Clean Abstraction: Write your business logic once. Decouple your models and processes from transport layers, databases, file storages, or messaging brokers.
- No Vendor Lock-In: Seamlessly swap database engines (SQLite, PostgreSQL, Firestore), auth providers (Supabase Auth, Firebase Auth, OIDC/OAuth, Basic Auth), object storage backends (Local FileSystem, AWS S3, MinIO), or message queues (AMQP/RabbitMQ, AWS SQS, GCP Pub/Sub) via simple configuration changes.
- Modular by Design: The framework is split into clean, highly factorized packages. Use only the bricks you need, from core object validation to authentication, storage, and pub/sub queues.
- Standalone Core: The
@quatrain/corepackage works entirely in-memory for defining models, validation, and business logic, without requiring any database or network connection.
Core is built upon three foundational pillars to ensure enterprise-grade reliability and longevity:
- Sovereignty by Design: Deploy anywhere, from your local laptop to the largest hyperscalers (AWS, GCP, Azure). Core's adapter pattern prevents vendor lock-in, ensuring you retain total control over your data and infrastructure choices.
- Cybersecurity by Design: We rely on rock-solid, audited, and widely adopted components. By keeping the core architecture simple and maintainable, we reduce the attack surface and make security patching straightforward.
- Cloud-Native Best Practices: Designed to build robust applications that withstand the test of time. Core embraces stateless execution, ephemeral environments, and seamless horizontal scaling to effortlessly adapt to technological innovations.
The Design phase is all about modeling your domain and laying the foundations of your application without worrying about the underlying database or UI framework logic.
@quatrain/core: Foundation package. Works standalone in-memory. Defines models, properties, validation, and serialization.@quatrain/types: Shared contracts, types, interfaces, and exceptions for Core.@quatrain/studio: Visual interface and meta-modeling package used by the visual studio application.@quatrain/ui: Core styling and component logic (Mantine-based) for consistent frontend experiences.
Tip
For complete documentation, modeling details, and quick-start tutorials on these packages, please refer to the Core Wiki.
During Development, you connect your business logic to services such as databases, authentication, AI, and message queues, using interchangeable adapters.
- Database Adapters:
@quatrain/backend,@quatrain/backend-firestore,@quatrain/backend-postgres,@quatrain/backend-sqlite - Authentication:
@quatrain/auth,@quatrain/auth-firebase,@quatrain/auth-supabase,@quatrain/auth-oidc,@quatrain/auth-pocketbase - Storage:
@quatrain/storage,@quatrain/storage-firebase,@quatrain/storage-supabase,@quatrain/storage-local,@quatrain/storage-s3 - Queueing & Messaging:
@quatrain/queue,@quatrain/queue-amqp,@quatrain/queue-aws,@quatrain/queue-gcp,@quatrain/messaging,@quatrain/messaging-firebase - AI & Automation:
@quatrain/ai,@quatrain/ai-gemini,@quatrain/app,@quatrain/code,@quatrain/code-github - Testing:
@quatrain/testing
Tip
For full code persistence examples, dependency injection setups, and service integrations, visit the Core Wiki.
Deployment covers running your code, scaffolding new environments, configuring API gateways, and handling data migrations.
- CLI & Code Generation:
@quatrain/core-cli(Scaffolds projects, configurations, and migrations) - Migrations:
@quatrain/backend-migrations(Schema and data migration tooling) - Cloud Wrappers:
@quatrain/cloudwrapper,@quatrain/cloudwrapper-firebase,@quatrain/cloudwrapper-supabase(Serverless/Edge functions handling)
All deployable applications, live modeling portals, gateway proxies, and pre-built deployment setups are organized in the dedicated companion repository:
Here you will find ready-to-use Docker/Podman container images and configurations:
api-gateway: Ultra-lightweight Express-based reverse proxy routing requests to your upstream services.studio-image: Pre-configured environment hosting the Visual Developer Studio Dashboard.
The Core ecosystem is constantly evolving to empower developers and business users alike. Our roadmap includes:
- Studio: A complete, visual interface to design and manage your entire application ecosystem. This studio will be driven by the user and seamlessly assisted by a Large Language Model (LLM) to accelerate scaffolding, modeling, and repetitive tasks.
- BPM & State Machines: A powerful Business Process Management (BPM) engine allowing you to manage complex business logic and entity lifecycles through robust, visual "State Machines".
Core is released under the AGPL-3.0 (Affero General Public License). This ensures that any enhancements to the open-source core remain free and accessible to the community. If you build a SaaS or application using this framework, you must comply with the AGPL-3.0 terms.
Professional Services & Commercial Licensing
If your organization requires a commercial license (to integrate Core without the AGPL-3.0 restrictions), or if you need expert assistance, the Quatrain team offers:
- Commercial Licensing: Tailored licenses for proprietary software and enterprise deployments.
- Custom Development: Expert engineers to help you build or migrate your backend architecture.
- Premium Support: Priority SLA, architectural consulting, and code reviews.
Contact us at developers@quatrain.com to discuss your project needs.