I was building a global configuration delivery system.I analyzed the configuration file delivery system that the company had (dozens of products) and the requirements that were made.Analyzed various available global approaches to delivering configurations.We chose solutions based on Apache Kvrocks and etcd for PoC.As part of the PoC based on etcd, the delivery of changes was accelerated from an indefinite time (up to several minutes) to several seconds for the most remote edges.Stability, consistency, and observability of configuration delivery have reached a completely new level.I did not have time to solve a theoretical problem in which it was necessary to perform simultaneous full state synchronization (the case of loss of files db state on all hundreds of edges).

Participation in the development and operation of an internal solution for L3/L4 DDoS mitigation. The solution is used to provide DDoS mitigation services for many leading gaming companies.Interacted with the development team from the first stages: advised on the top-level design of the configuration and statistics system; implemented a statistics collection system; participated in the first launch of the system in production and in day-to-day operation and on-call.In addition, I consulted other product teams about secure development and vulnerabilities; was engaged in the analysis of vulnerabilities reported by the bug hunting program in terms of reproduction, impact and ways of solving. I prepared training materials on the reported vulnerabilities.

Participated in the development of the product from the first days: was involved in the development of protection methods and the operational part: statistics, monitoring, automation, etc.;I integrated web protection with L3/L4 protection solution.Was involved in daily operations and on-call duties. On-call duty included responding to both infrastructure problems and DDoS Mitigation for clients.

DevOps at BIFIT Mitigator (developer of a DDoS protection solution) – https://mitigator.ru/mainengFor more than 2 years of work, I dealt with a large number of different tasks:* infrastructure administration;* automation using bash, python3, ansible, kotlin (teamcity);* writing PoC services using python3, go;* consultation with Mitigator on-site installation/use;* python3 code review (code of autotest team mostly);* migration to metrics solution based on graphite-clickhouse (go + clickhouse as storage) instead of the canonical graphite (python based).

Was involved in consulting technical specialists of banks (clients) on our company’s products (RB and related solutions), resolving incidents;Achievements:* The first and last promotion in the history of the department based on the results of the first reporting period;* Bonus for optimizing the work of the department (integration of Jira with Mantis via email);* The best specialist of L2 support by number of solved incidences in in the first month from the introduction of statistics (second month I was already in a different department);