Feature Flag Backend

Feature Flag App Backend Template
Remote Configuration and Feature Toggles

Q: What is a feature flag backend?

A feature flag backend is a BaaS schema and API for feature management: users, features, and toggles.

Q: What does the Feature Flag template include?

It includes User (username, email, password), Feature (name, description), Toggle (feature, user, status), ER diagram, API playground, and an AI Agent prompt.

Q: Why use Back4app for a feature management app?

Back4app provides managed database, auth, real-time queries, and flexible schema so you can ship feature rollouts and configuration flows without running your own backend.

Q: How do I run queries for users and features with Flutter?

Use the User and Feature classes to query and display profiles and configurations, leveraging the Back4app SDK.

Q: How do I create a toggle with Next.js server actions?

Use a server action to create a Parse Object for Toggle with feature and user pointers and status. Optionally validate in Cloud Code.

Q: Can React Native cache users and features offline?

Yes. Enable Local Datastore and pin User and Feature results so users can browse saved configurations without connectivity.

Q: How do I prevent duplicate toggles?

In Cloud Code beforeSave for Toggle, query existing toggles and reject if a duplicate exists.

Q: What is the best way to show user profiles and features on Android?

Query User and Feature classes to display profiles and configurations, using the Back4app SDK for data management.

Q: How does the toggle flow work end-to-end?

Users can toggle features on and off, and the system updates in real-time using Live Queries for instant notifications.

A production-ready feature flag backend on Back4app with users, features, and toggles. Includes ER diagram, data dictionary, JSON schema, API playground, and an AI Agent prompt for rapid bootstrap.

Build with AI Agent Choose Your Technology

Key Takeaways

This template gives you a feature flag backend with users, features, and toggles so your team can focus on phased rollouts and remote configuration.

Feature-centric schema design — Model features with toggles and user-specific configurations in clear, queryable structures.
Real-time configuration updates — Use Back4app's real-time capabilities for instant feature toggle updates.
User-specific feature management — Manage feature rollouts with user-specific toggles and configurations.
Remote configuration capabilities — Enable remote configuration of features for seamless updates and testing.
Cross-platform feature management — Serve mobile and web clients through a single REST and GraphQL API for users, features, and toggles.

What Is the Feature Flag App Backend Template?

Back4app is a backend-as-a-service (BaaS) for fast product delivery. The Feature Flag App Backend Template is a pre-built schema for users, features, and toggles. Connect your preferred frontend (React, Flutter, Next.js, and more) and ship faster.

Best for:

Feature management applicationsRemote configuration platformsPhased rollout systemsMobile-first feature togglesMVP launchesTeams selecting BaaS for feature management

Overview

A feature management product needs user profiles, features, and toggles.

This template defines User, Feature, and Toggle with real-time features and ownership rules so teams can implement feature management quickly.

Core Feature Flag Features

Every technology card in this hub uses the same feature flag backend schema with User, Feature, and Toggle.

User profiles and configurations

User class stores username, email, password, and configurations.

Feature creation and management

Feature class links name, description, and status.

Toggle management

Toggle class stores feature reference, user, and status.

Why Build Your Feature Flag Backend with Back4app?

Back4app gives you user, feature, and toggle primitives so your team can focus on feature rollouts and configuration instead of infrastructure.

•User and feature management: User class with profile fields and feature class for configuration management supports feature toggles.
•Toggle and configuration features: Manage feature toggles with user-specific configurations and allow seamless updates.
•Realtime + API flexibility: Use Live Queries for toggle updates while keeping REST and GraphQL available for every client.

Build and iterate on feature management quickly with one backend contract across all platforms.

Core Benefits

A feature management backend that helps you iterate quickly without sacrificing structure.

Rapid feature launch

Start from a complete user, feature, and toggle schema rather than designing backend from zero.

Real-time configuration support

Leverage real-time toggle updates for enhanced feature management.

Clear configuration flow

Manage feature configurations with user-specific toggles and statuses.

Scalable permission model

Use ACL/CLP so only users can edit their configurations and manage feature toggles.

Toggle and feature data

Store and aggregate toggle data for display and interaction without schema resets.

AI bootstrap workflow

Generate backend scaffolding and integration guidance fast with one structured prompt.

Ready to launch your feature management app?

Let the Back4app AI Agent scaffold your feature flag backend and generate users, features, and toggles from one prompt.

Build with AI Agent Try the API Playground

Free to start — 50 AI Agent prompts/month, no credit card required

Technical Stack

Everything included in this feature flag backend template.

Frontend

13+ technologies

Backend

Back4app

Database

MongoDB

Auth

Built-in auth + sessions

API

REST and GraphQL

Realtime

Live Queries

ER Diagram

Entity relationship model for the feature flag backend schema.

ER Diagram

View diagram source

Mermaid

erDiagram
    User ||--o{ Toggle : "user"
    FeatureFlag ||--o{ Toggle : "featureFlag"
    User ||--o{ AuditLog : "user"
    FeatureFlag ||--o{ AuditLog : "featureFlag"

    User {
        String objectId PK
        String username
        String email
        String password
        Date createdAt
        Date updatedAt
    }

    FeatureFlag {
        String objectId PK
        String name
        String description
        Boolean enabled
        Date createdAt
        Date updatedAt
    }

    Toggle {
        String objectId PK
        Pointer featureFlag FK
        Pointer user FK
        Boolean enabled
        Date createdAt
        Date updatedAt
    }

    AuditLog {
        String objectId PK
        String action
        Pointer user FK
        Pointer featureFlag FK
        Date timestamp
    }

Integration Flow

Typical runtime flow for auth, user profiles, features, and toggles.

ER Diagram

View diagram source

Mermaid

sequenceDiagram
  participant User
  participant App as Feature Flag App
  participant Back4app as Back4app Cloud

  User->>App: Login
  App->>Back4app: POST /login
  Back4app-->>App: Session token

  User->>App: List feature flags
  App->>Back4app: GET /classes/FeatureFlag
  Back4app-->>App: Feature flags

  User->>App: Toggle feature flag
  App->>Back4app: POST /classes/Toggle
  Back4app-->>App: Toggle objectId

  App->>Back4app: Log action
  Back4app-->>App: Audit log entry

Data Dictionary

Full field-level reference for every class in the feature flag schema.

Field	Type	Description	Required
objectId	String	Auto-generated unique identifier	Auto
username	String	User login name
email	String	User email address
password	String	Hashed password (write-only)
createdAt	Date	Auto-generated creation timestamp	Auto
updatedAt	Date	Auto-generated last-update timestamp	Auto

6 fields in User

Security and Permissions

How ACL and CLP strategy secures users, features, and toggles.

User-owned configuration controls

Only the user can update or delete their configurations; others cannot modify user content.

Feature and toggle integrity

Only the creator can create or delete their features and toggles. Use Cloud Code for validation.

Scoped read access

Restrict feature and toggle reads to relevant parties (e.g. users see their own configurations and public features).

Schema (JSON)

Raw JSON schema definition ready to copy into Back4app or use as implementation reference.

JSON

{
  "classes": [
    {
      "className": "User",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "username": {
          "type": "String",
          "required": true
        },
        "email": {
          "type": "String",
          "required": true
        },
        "password": {
          "type": "String",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "FeatureFlag",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "name": {
          "type": "String",
          "required": true
        },
        "description": {
          "type": "String",
          "required": false
        },
        "enabled": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "Toggle",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "featureFlag": {
          "type": "Pointer",
          "required": true,
          "targetClass": "FeatureFlag"
        },
        "user": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "enabled": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "AuditLog",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "action": {
          "type": "String",
          "required": true
        },
        "user": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "featureFlag": {
          "type": "Pointer",
          "required": true,
          "targetClass": "FeatureFlag"
        },
        "timestamp": {
          "type": "Date",
          "required": false
        }
      }
    }
  ]
}

Build with AI Agent

Use the Back4app AI Agent to generate a real feature flag app from this template, including frontend, backend, auth, and user, feature, and toggle flows.

Back4app AI Agent

Ready to build

Create a feature flag app backend on Back4app with this exact schema and behavior.

Schema:
1. User (use Back4app built-in): username, email, password; objectId, createdAt, updatedAt (system).
2. Feature: name (String, required), description (String); objectId, createdAt, updatedAt (system).
3. Toggle: feature (Pointer to Feature, required), user (Pointer to User, required), status (String: active, inactive, required); objectId, createdAt, updatedAt (system).

Security:
- Only the user can update/delete their configurations. Only the creator can create/delete their features and toggles. Use Cloud Code for validation.

Auth:
- Sign-up, login, logout.

Behavior:
- List users, create features, toggle features, and manage configurations.

Deliver:
- Back4app app with schema, ACLs, CLPs; frontend for user profiles, features, and toggles.

Press the button below to open the Agent with this template prompt pre-filled.

This is the base prompt without a technology suffix. You can adapt the generated frontend stack afterward.

Deploy in minutes50 free prompts / monthNo credit card required

API Playground

Try REST and GraphQL endpoints against the feature flag schema. Responses use mock data and do not require a Back4app account.

Loading playground…

Uses the same schema as this template.

Choose Your Technology

Expand each card for integration steps, state patterns, data model examples, and offline notes.

What You Get with Every Technology

Every stack uses the same feature flag backend schema and API contracts.

Unified feature management for feature flag

Easily manage all features and toggles in one centralized system.

Granular access control for feature flag

Define who can access specific features based on roles.

REST/GraphQL APIs for feature flag

Flexible APIs to integrate and control features seamlessly.

Real-time feature toggle updates for feature flag

Instantly update feature flags without redeploying your app.

A/B testing support for feature flag

Conduct experiments to optimize feature performance and user experience.

Comprehensive analytics for feature flag

Track feature usage and performance metrics to inform decisions.

Feature Flag Framework Comparison

Compare setup speed, SDK style, and AI support across all supported technologies.

Framework	Setup Time	Feature Flag Benefit	SDK Type	AI Support
Flutter	~3–7 min	Single codebase for feature flag on mobile and web.	Typed SDK	Full
React	Rapid (5 min) setup	Fast web dashboard for feature flag.	Typed SDK	Full
React Native	~5 min	Cross-platform mobile app for feature flag.	Typed SDK	Full
Next.js	About 5 min	Server-rendered web app for feature flag.	Typed SDK	Full
JavaScript	Under 5 min	Lightweight web integration for feature flag.	Typed SDK	Full
Android	~3–7 min	Native Android app for feature flag.	Typed SDK	Full
iOS	Rapid (5 min) setup	Native iOS app for feature flag.	Typed SDK	Full
Vue	~5 min	Reactive web UI for feature flag.	Typed SDK	Full
Angular	About 5 min	Enterprise web app for feature flag.	Typed SDK	Full
GraphQL	~2 min	Flexible GraphQL API for feature flag.	GraphQL API	Full
REST API	Under 2 min	REST API integration for feature flag.	REST API	Full
PHP	~3–5 min	Server-side PHP backend for feature flag.	REST API	Full
.NET	~5 min	.NET backend for feature flag.	Typed SDK	Full

Setup time reflects expected duration from project bootstrap to first feature toggle using this template schema.

Frequently Asked Questions

Common questions about building a feature flag backend with this template.

What is a feature flag backend?

What does the Feature Flag template include?

Why use Back4app for a feature management app?

How do I run queries for users and features with Flutter?

How do I create a toggle with Next.js server actions?

Can React Native cache users and features offline?

How do I prevent duplicate toggles?

What is the best way to show user profiles and features on Android?

How does the toggle flow work end-to-end?

Trusted by developers worldwide

Join teams shipping feature management products faster with Back4app templates

Ready to Build Your Feature Flag App?

Start your feature management project in minutes. No credit card required.

Choose Technology

Feature Flag App Backend TemplateRemote Configuration and Feature Toggles

Key Takeaways

What Is the Feature Flag App Backend Template?

Overview

Core Feature Flag Features

User profiles and configurations

Feature creation and management

Toggle management

Why Build Your Feature Flag Backend with Back4app?

Core Benefits

Rapid feature launch

Real-time configuration support

Clear configuration flow

Scalable permission model

Toggle and feature data

AI bootstrap workflow

Ready to launch your feature management app?

Technical Stack

ER Diagram

Integration Flow

Data Dictionary

Security and Permissions

User-owned configuration controls

Feature and toggle integrity

Scoped read access

Schema (JSON)

Build with AI Agent

API Playground

Choose Your Technology

Flutter Feature Flag Backend

React Feature Flag Backend

React Native Feature Flag Backend

Next.js Feature Flag Backend

JavaScript Feature Flag Backend

Android Feature Flag Backend

iOS Feature Flag Backend

Vue Feature Flag Backend

Angular Feature Flag Backend

GraphQL Feature Flag Backend

REST API Feature Flag Backend

PHP Feature Flag Backend

.NET Feature Flag Backend

What You Get with Every Technology

Unified feature management for feature flag

Granular access control for feature flag

REST/GraphQL APIs for feature flag

Real-time feature toggle updates for feature flag

A/B testing support for feature flag

Comprehensive analytics for feature flag

Feature Flag Framework Comparison

Frequently Asked Questions

Trusted by developers worldwide

Ready to Build Your Feature Flag App?

Feature Flag App Backend Template
Remote Configuration and Feature Toggles