Atekian
TREN
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Backend and API Development

Our backend service covers data model design, REST API development, authentication and authorization, and third-party integrations. We use .NET, Python and PostgreSQL.

Problems we see

  • When the data model is rushed, every new feature months later demands awkward changes to the database schema.
  • Authentication and authorization bolted on afterwards usually mean rewriting the application.
  • Without a written API contract, mobile and web teams proceed on different assumptions and lose time at integration.

Our approach

  • We produce the data model in week one. Schema decisions are the most expensive to reverse; they deserve early care.
  • Authorization is designed as part of the data model, not as a control layer added later.
  • The API contract is written before development starts, so client teams can work in parallel against mocks.
  • PostgreSQL is our default. Relational integrity is worth more than flexibility in most business applications.

Process

  1. 01

    Data model design

    Entities, relationships and constraints are mapped. Everything else rests on this.

  2. 02

    API contract

    Endpoints, request/response shapes and error cases are written down.

  3. 03

    Identity and authorization

    Authentication, role definitions and access rules are established.

  4. 04

    Development and testing

    Business logic is built, with automated tests for critical flows.

  5. 05

    Release and monitoring

    Environment configuration, deployment pipeline and error tracking are set up.

What you get

  • Source code and database schema
  • API documentation
  • Authentication and role-based authorization structure
  • Database migration files
  • Deployment pipeline and environment configuration

Technologies we use

.NETC#PythonPostgreSQLREST API

Related work

Frequently asked questions

Why do you use PostgreSQL?

In most business applications, the relationships and integrity rules between data matter more than schema flexibility. PostgreSQL guarantees relational integrity at the database level and still offers flexibility through JSON columns. If a document-oriented store is genuinely required, we evaluate that during discovery.

Can you take over our existing backend?

Yes. Before taking over we run a review of the codebase, data model and release process. The output is a list of critical risks and a recommendation on which parts to improve and which to rewrite.

Do you provide API documentation?

Yes. Endpoints, request and response shapes, error codes and the authentication flow are documented. A draft is prepared before development starts so client teams can work in parallel while the backend is still being built.

Let's talk about your backend

Describe your existing system or the structure you want to build, and we'll share our architectural recommendation.

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