Maciej聽Lesiczka
Principal Engineer at Clari
Krakow, Lesser Poland Voivodeship
Summary
馃懁
Senior馃帗
Top SchoolMaciej Lesiczka is a Principal Software Engineer based in Krakow with 15+ years focused on distributed data systems and 11 years in senior engineering roles driving large-scale data platforms. He has designed SQL-like query languages (RevQL), built CDC-based reverse ETL engines, and led stateful streaming services handling multi-petabyte datasets using Kafka, Flink, Iceberg and Snowflake. Known for pragmatic database performance tuning across PostgreSQL and complex CDC implementations for SaaS, he blends deep systems engineering with product-focused delivery. At Zendesk and Clari he shipped cross-cutting platform components鈥攍ike a secure distributed data deletion service and EventBus鈥攖hat bridge storage, streaming, and analytics. Colleagues describe him as an engineer who surfaces practical optimizations from low-level query plans up to cloud-native architecture decisions.
11 years of coding experience
15 years of employment as a software developer
AGH University of Krakow
English, Polish
Github Skills (22)
bootcamp8
hocon8
performance-counters7
actor-system6
hash5
akka5
actor-model4
backend4
php3
sanitize3
parquet3
delayed-job3
monitoring3
ruby2
crm2
Programming languages (5)
Github contributions (5)
MaciekLesiczka/azof
Feb 2025 - Feb 2026
Lakehouse with time travel
Contributions:1 release, 10 PRs, 87 pushes in 11 months
datafusiondatalakelakehouseparquetrust-lang
MaciekLesiczka/netric
Nov 2015 - Mar 2017
Contributions:23 releases, 47 commits, 12 PRs in 1 year 3 months
sources
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