High-level design of architecture (HLD)

High-level system design or HLD is a step-by-step description of the architecture of an IT system. It is created to ensure that the customer’s ToR is 100% fulfilled in compliance with all the necessary requirements and is based on the results of the audit preceding the HLD.

To build a scalable information system, you need to:

Structure all existing components and approaches.


Adapt them to the concept of the future IT infrastructure.

This type of design describes the system at the level of interfaces, subsystems, and modules, and is not responsible for analyzing configurations in detail.

Building the right HLD consists of the following steps :

Design of the information system and its individual elements

Designing a visual concept of the IT system architecture, as well as full detailing.

A detailed description of the system elements and their functionality

Step-by-step instructions on what the functions of each element are and how they interact with each other. We also add information about the result of each action.

Detailed scheme
by application

You get a complete table with general information on the implementation of software architecture. This includes information about important work stages that helps to create a full-fledged project plan, including the calculation of labor costs.

What you get
as a result?

Report on the state of IT infrastructure: resources of the main equipment components, as well as identified problems and risks that may affect business operations

Recommendations for eliminating existing problems

Recommendations for system modernization

What does include in architecture design?

Formation of tasks from the customer and the contractor.

Description of the design: what is the basis, what meaning we put into it.

Solution size and functionality: scaling prospects, computing power, etc.

Defining the goal: what are the purposes of forming an HLD.

Key features: security, monitoring, control, etc.

It is important not to forget about the conclusions, which will demonstrate the benefits for the client, a clear understanding of what steps should be taken to achieve the project goals.

HLD is a good solution for system planning because it is a flexible format where you can change something, re-analyze it, and influence the improvement of performance. This method allows you to analyze the project at scale to clearly understand which specific actions will lead to which specific results.

Audit of network, infrastructure and engineering systems

Supply of equipment, materials and software

Construction and commissioning of data centers

Audit of information and network security

Audit and design of communications and engineering systems

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