Some of the projects I was involved in or run on my own.

Axibase Collector
Spring Batch-based ETL application which transforms metrics from different formats and
different sources into ATSD format

Axibase Time-Series Database
Implemented different components for time-series database, such as: token
authentication, impersonation, rule engine, CSV parser with column types detection
based on heuristics, workday calendars, and others. Technologies: Java 8, Spring, HBase

Rule Engine
Perform real-time analysis of incoming data. Run actions (email/webhook notifications,
custom script executions, logging, derived command generation) upon conditions
satisfied. Able to generate screenshots of portals for incoming metric and send them to
Slack/Telegram. Used for infrastructure monitoring, building Telegram and Slack bots for
office lifetime scenarios, and even high-frequency trading. Technologies: MVEL, ANTLR,
webdriver

atsd-jdbc
Type-4 JDBC driver for Axibase Time-Series Database. Technologies: Java 7+, Apache
Avatica, Apache HTTP Client, Univocity CSV Parser

axibase-moex-consumer
A set of microservices to read and process ASTS and Spectra FAST feeds. All received
datagrams are persisted to disk, then deduplicated, FAST-decoded, and business entities
get logged and saved to Axibase Time-Series database. Technologies: Java 17, Epsilon GC
(network-reader microservice) and Shenandoah GC, Chronicle Queue, Netty.

axibase-fix-engine
Implemented a low-latency FIX engine with pluggable message decoders. Achieved the
95p latency of 200 microseconds on NewOrderSingle command submitted to MOEX ASTS
stock market from DMA-located server. Nanosecond resolution supported via own library
"axibase/HighResolutionClock" on Java8+. Optional message and session state storage on
file system is also supported.

mimid
A prototype of a data connectivity platform based on Apache Calcite

Some of the projects I was involved in or run on my own.

Axibase Collector
Spring Batch-based ETL application which transforms metrics from different formats and
different sources into ATSD format

Axibase Time-Series Database
Implemented different components for time-series database, such as: token
authentication, impersonation, rule engine, CSV parser with column types detection
based on heuristics, workday calendars, and others. Technologies: Java 8, Spring, HBase

Rule Engine
Perform real-time analysis of incoming data. Run actions (email/webhook notifications,
custom script executions, logging, derived command generation) upon conditions
satisfied. Able to generate screenshots of portals for incoming metric and send them to
Slack/Telegram. Used for infrastructure monitoring, building Telegram and Slack bots for
office lifetime scenarios, and even high-frequency trading. Technologies: MVEL, ANTLR,
webdriver

atsd-jdbc
Type-4 JDBC driver for Axibase Time-Series Database. Technologies: Java 7+, Apache
Avatica, Apache HTTP Client, Univocity CSV Parser

axibase-moex-consumer
A set of microservices to read and process ASTS and Spectra FAST feeds. All received
datagrams are persisted to disk, then deduplicated, FAST-decoded, and business entities
get logged and saved to Axibase Time-Series database. Technologies: Java 17, Epsilon GC
(network-reader microservice) and Shenandoah GC, Chronicle Queue, Netty.

axibase-fix-engine
Implemented a low-latency FIX engine with pluggable message decoders. Achieved the
95p latency of 200 microseconds on NewOrderSingle command submitted to MOEX ASTS
stock market from DMA-located server. Nanosecond resolution supported via own library
"axibase/HighResolutionClock" on Java8+. Optional message and session state storage on
file system is also supported.

mimid
A prototype of a data connectivity platform based on Apache Calcite