A mobile backend decides which records an app can access and what happens when it requests an action. EidenTech can build or extend those services, including authentication, persistence, uploads, notifications, and business connections. The scope begins with the app’s journeys and failure conditions so backend behaviour remains understandable to both users and operators.
How we approach your project
Define API contracts from the mobile journeys
A mobile screen needs the right data, a useful loading state, and an understandable response when an action fails. We map those needs into API contracts with validated inputs, clear error categories, pagination, and stable record identifiers. A device may keep using an older application version after the backend changes, so compatibility and deprecation need a deliberate plan. We review which reads can be combined and which actions require an independent transaction. This makes the connection clearer than exposing database tables directly to the app.
Enforce identity and record access on the server
Authentication identifies a user; authorization decides which account, record, or action that user may access. We define sessions, account recovery, role changes, and revocation, then enforce permissions independently of controls hidden in the app. Uploaded files and generated exports need the same access review as API responses. Secrets used for third-party integrations belong in server-side configuration. Acceptance checks include expired sessions, a removed role, another customer’s identifier, and a device attempting an action its account is not permitted to complete.
Coordinate synchronization and notifications
Mobile connections can disappear during a submission or return after a long delay. We scope duplicate prevention, resumable or repeatable uploads where needed, and conflict handling for records changed on several devices. Notification delivery is separate from a successful business action: a push message may be delayed or never displayed. The API remains the authority for status. Background jobs need visible completion and failure states, with retries defined for each operation. Device tokens, preferences, and sign-out behaviour are also part of the notification model.
Make release and support behaviour observable
The backend needs an operating plan for errors, provider failures, schema changes, and increased usage. We identify the events and references useful for diagnosing a failed journey without unnecessarily logging sensitive data. Rate limits and request validation are scoped against realistic usage. Data migration and API compatibility checks belong in release validation alongside the happy path. Handover covers deployment, configuration ownership, backup and recovery expectations, and who investigates failed jobs. Performance targets are agreed and tested against an appropriate workload rather than inferred from a demonstration.
What we can deliver
We agree the requirements and responsibilities before development begins. Your project scope can include:
- An API and data model derived from the app’s user journeys, roles, integration needs, and version-compatibility expectations.
- Server-side authentication, permission checks, validated application actions, persistence, and scoped file handling.
- Agreed notification, background-job, synchronization, and duplicate-handling workflows with clear failure states.
- Access, interruption, and release acceptance scenarios, operating documentation, and configuration and deployment handover.
Technology choices for your requirements
The stack follows your integrations, operating model, and maintenance needs. These are options to review during discovery, rather than a fixed stack promised for every project.
- A TypeScript or other suitable server API, selected around the existing application and business requirements.
- PostgreSQL and scoped object storage where relational records and uploads fit the data model.
- Supported authentication, notification, and integration APIs, with durable job processing for the agreed asynchronous workflows.
Planning questions, answered
Can you build the backend for an app designed elsewhere?
Yes. We can review the screen flows, expected API responses, authentication, and data requirements. Representative requests and failure states help define the contract before implementation, including which team owns changes to the app and backend.
Can the backend support both a website and a mobile app?
Yes. Shared business rules and records can serve several interfaces, while each client may need different response shapes or authentication handling. We define the supported clients and compatibility expectations so one release does not accidentally break another.
Can users receive push notifications?
Yes, using supported platform and provider interfaces. The scope includes device registration, permission preferences, relevant triggers, and token cleanup. Push delivery should not be treated as proof that a customer saw or completed the underlying task.
What happens if the app retries a submission?
The API can identify repeatable requests and use appropriate duplicate prevention for consequential actions. We agree how identifiers, validation, and transaction boundaries work, then test interruptions so a retry does not silently create another order or record.
Tell us what needs to work better.
Share your idea, existing workflow, and the outcome you need. We will help shape a practical starting point.
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