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Backend Development Services

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Backend Development Services

Get a seamless product that meets market needs and offers an enjoyable UX. With extensive experience in diverse programming languages and the latest technologies, our highly qualified experts offer a variety of back-end services to different business verticals.

Mobile App Back-end Development

Our software engineers deliver high-quality mobile applications that are up-to-date with the recent trends and win your customers’ loyalty.

Our team of backend experts creates a custom back-end solution quickly and with care to every code piece. By using only cutting-edge technologies and programming languages (JavaScript, Python), we dive deep into your app’s business logic and synchronize all data across multiple platforms. We make sure your application is reliable, secure, covers all needs of end-users, and can be seamlessly integrated with third-party services.

  • Back-end Application Development
  • Technical Back-end Audit
  • Cloud Back-End Solutions

Our Approach

CellDepth Infotech offers services of both cross-functional teams and individual backend engineers. Our experts are well-organized, goal-oriented, punctilious, and flexible in terms of technologies and approaches used. Our development process is based on the Agile approach, which involves conducting regular sprints, each of which is devoted to working on a specific component of the program. Using this approach allows us to analyze and evaluate the results of our work.

Our Backend Development Services Process

Entities and relations diagram

Goal: To create ER diagrams that serve as a formal representation of what data should contain and the relationship of entity sets in a database. Besides, ER diagrams help to define the requirements for the project.

Entity definition

At this stage, all entities are identified and rendered using geometric shapes.

Actions

Entity determination session.

Deliverables

Visualization of certain entities.

Relationships identification

Definition and designation of relationships between entities.

Actions

Сonnection of entities using special symbols.

Deliverables

Visual illustration of relationships between entities.

Adding attributes

At this stage, key attributes are added.

Actions

Adding entity attributes.

Deliverables

Visualization of entity attributes.

Completing the diagrams

At this stage, all objects are connected by different lines, and all connections are described. Each entity can have several relationships or none at all.

Actions

Completing all connections and descriptions.

Deliverables

A ready conceptual data model diagram.

Database design

Goal: To design the database based on user requirements and create physical and logical design models for the chosen database system.

Logical model design

A logical model is created. It describes the data in detail (entities, relationships between them, primary keys for each entity, and attributes) and does not focus on physical implementations.

Actions

    • Specifying all the entities with primary keys.
    • Specifying concurrent relationships between entities.
    • Identification of entity attributes.
    • Conducting the normalization process.

Deliverables

A detailed logical data model.

Physical model design

This model describes the main practices and implementations of the logical model.

Actions

    • Converting the entities into tables.
    • Transforming the relationships into foreign keys.
    • Transforming data attributes into columns.
    • Modifying the data constraints.

Deliverables

A ready physical model design.

Design endpoints and documentation

Goal: To develop endpoints and create documentation describing resources and methods to accelerate maintenance and updates.

Identification of resources & states

Experts define resources and their states (there can be several states). After that, a diagram is created that allows devs to understand what resources are important and what resources are data attributes.

Tools

Postman, Swagger, Mulesoft

Deliverables

A state machine diagram.

API documentation

At this stage, we create API documentation that contains relevant endpoints of the API, request examples, various errors with the status codes and messages for them.

Tools

OpenAPI, API Blueprint, Swagger

Deliverables

Accurate API documentation.

Implement API

Goal: To build the API with the help of various programming languages according to the API design.

Building the API

Depending on the project, we decide on the platform, framework, and programming language we use. We make sure the developed API matches the approved design.

Tools

Python, JavaScript

Deliverables

Implemented API.

Writing tests & Deployment

Goal: To aid the debugging process and make sure the API is secure, functional, and reliable, development testing and use-case testing are performed. After the testing stage, the backend is deployed.

Writing tests

Various tests to validate the API’s functionality are used. These tests are added both to individual requests and collections.

Tools

Postman, JMeter

Deliverables

Test reports stating a properly functioning API.

Deployment

The backend is deployed using various approaches: either with the help of cloud service or using the dedicated host.

Tools

AWS

Deliverables

Deployed backend.