Sooner or later, any major company that interacts with customers over the Internet will encounter an increase in system complexity and emerging errors that must be resolved in a short period of time. Sometimes even a minute of downtime can lead to serious losses.

Maintaining a balance between operations and development is a keystone ingredient of SRE and DevOps engineers. At first glance, they may seem like competitors. But if you look in a little bit closer, the perceived rivals are actually additional pieces of the puzzle that fit together beautifully.


The System Reliability Engineer is a set of engineering practices developed by Google that sets the standard to which anyone responsible for system administration must adhere. It is the responsibility of the specialist himself to ensure the smooth operation of the system.


  • Selection, development, implementation of new technologies – SRE-engineer interacts not with a single product, but with the complex as a whole, so he must competently select and implement technologies to ensure smooth operation;
  • Development, maintenance of documentation in an up-to-date state – an accessible description of systems, and algorithms, that allow to quickly detect and eliminate the problem, which slows down or “breaks” the whole system, and which often leads to loss of profit of the whole company. That is why the technical support must have a special algorithm and tools for the immediate elimination of all possible problems;
  • Optimization, as well as development of technological stack at all levels – ensuring the smooth functioning of business processes: starting from software code up to the deployment of equipment in data centers.

In addition to the skills of the system administrator specialist also has the skills of a programmer who can not only read but also write code to automate a process, without undercutting the required values.


It is not unusual for SRE-engineers to use self-written programs, as well as Open Source applications written in python, golang, php, and java. Most SRE-engineers use the following applications:

  • Nginx – a proxy server with non-threaded architecture and open source code;
  • Redis – open source in-memory storage;
  • PostgreSQL – object-relational database management system;
  • MongoDB – a document-oriented database management system.

In addition to other basic programs (ClickHouse, Openstack, Gitlab, HDFS, etc.), the SRE engineer has the skills to use bug finding applications: Grafana, Alertmanager, Crashlytics and others.

The Linux operating system is used as a working environment, which has an open source code, allowing the system to be tailored to the needs of specialists and the company itself.


DevOps engineers combine software operations, development, and testing into a single complex that allows to make the process of delivering and building any software more consistent.

The implementation of this technology will increase performance not only of individual divisions, but also the entire system as a whole. Thanks to a competent transition, the boundaries between development and operation will gradually disappear thus opening up new opportunities for safe work.


The engineer is a full-time specialist, who must constantly monitor the performance of all digital processes of the company. The cost of a specialist depends on his knowledge and skills. Keep in mind that disruptions and low quality of client service can cost a company millions of dollars in losses.

SRE and DevOps-engineer presence in staff guarantees round-the-clock maintenance and high level of reliability of the whole system.

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