Wandered. Did some travel but mostly tried out business ideas that ended up not working:https://jacek.migdal.pl/2024/01/07/the-year-of-exploration.htmlHowever, I enjoyed the process, learned a lot, and discovered that database gateway should be my next thing.

From early employee pre-revenue to $2Bln+ Initial Public Offering (NYSE:SUMO).Major accomplishments:1. Created the Sumo Logic Warsaw office (~86 FTE). Personally sourced and hired ~30 employees, mostly engineers (ex-Facebook, Microsoft, Teradata, Hedge Fund employees). Made them productive quickly through training. Later professionalize structure, which included hiring site lead.2. Improved gross margin by ~50% reduction of AWS costs in a year. Lead the engineering execution of multiple projects: some reduced waste and chaos, other increased efficiency by better algorithms (e.g. stream processing) or more efficient data structure (40% smaller full-text indices). The improvements continued over the years, which allowed Sumo to compete on economics while maintaining high gross margins.3. Creatively recruited the team and led the Tracing team's execution. It launched a new product with the first commercial win in less than a year. In two years recognised Sumo Logic as a Challenger in the 2022 Gartner® Magic Quadrant™ for APM and Observability.4. Implemented and maintained encryption infrastructure for security and compliance (including PCI)5. Removed more lines of Scala code than added. Simplified and reused many components.Positions:- Sep 2021 - Dec 2022: Senior Director of Engineering- Jun 2019 - Aug 2021: Director of Engineering- Mar 2018 - May 2019: Senior Engineering manager, executive of Sumo Logic Poland- Sep 2017 - Feb 2018: Engineering manager, executive of Sumo Logic Poland- Nov 2016 - Aug 2017: Engineering manager- Apr 2015 - Oct 2016: Senior software engineer; Warsaw, Poland- Oct 2014 - Mar 2015: Senior software engineer- Oct 2013 - Sep 2014: Backend software engineer; Redwood City, California- Sep 2012 - Sep 2013: Backend software engineer; Warsaw, Poland (remote)- June 2012 - Sep 2012: Software Intern; Mountain View, California- April 2012 - June 2012: Part-time contractor; Warsaw, Poland (remote)

HBase team (distributed key-value database). Implemented custom compression, which saves space and allow queries without decompressing.Tech details: https://issues.apache.org/jira/browse/HBASE-4218High-level overview (Data Block Encodings paragraph): http://blog.cloudera.com/blog/2012/06/hbase-io-hfile-input-output/Technologies:Hadoop, Java

Improved the CUDA programming model.Implemented the first fully functional Linux prototype. Later this technology was released as: http://devblogs.nvidia.com/parallelforall/unified-memory-in-cuda-6/Technologies:Linux kernel development, C, hardware drivers

Worked on OpenCL and CUDA driver. Fixed bugs and improved the compiler infrastructure.

Research in dynamic service discovery (Semantic Web). Created a prototype application of semantic and statistical-based discovery.Co-author: "Discovery of Optimized Web Service Configurations Using a Hybrid Semantic and Statistical Approach" (published at International Conference on Web Services 2009)

The Polish Children's Fund is an independent, non-governmental organization established in 1981. One of its major objectives is to help highly gifted pupils and students to pursue and develop their academic interests and artistic talents and to adjust the educational system in Poland to accommodate the special needs of highly gifted children.Tutor during:-scientific workshop at ICM (February 2008),-interdisciplinary workshop in Świder (April 2008);

-development of a program for natural language analysis (C++)-R&D project for Prokom Software (C, NVIDIA CUDA)