Oct 2022 – Dec 2022 · 2 mos · Netherlands · Hybrid

• Freelance contract work.
• Was busy with Apache Airflow, dbt, AWS.

Mar 2022 – Jun 2022 · 3 mos · Netherlands

Mar 2021 – Feb 2022 · 11 mos · Amsterdam, North Holland, Netherlands

• Assembled Data Warehouse In BigQuery following dimensional modeling design;
• Implemented incremental data transformation processes in BigQuery with Dataform 💰;
• worked in agile (Scrum) way 🤹;
• Participated in interviewing Data Engineers.

Oct 2018 – Feb 2021 · 2 yrs 4 mos · The Randstad, Netherlands

• worked with AWS Redshift, AWS Glue, Kinesis, AWS Database Migration Service;
• managed infrastructure on AWS with Cloudformation;
• built data pipelines with Apache Airflow;
• designed data warehouse ETL processes;
• modeled data warehouse following dimensional modeling design;
• optimized performance of SQL queries 🚀;
• participated in the interviewing process for positions of Data Engineer/DevOps/DWH Engineer 🤝.

Sep 2016 – Aug 2018 · 1 yr 11 mos · The Randstad, Netherlands

• wrote MDX queries for reports;
• implemented cubes based on the Dimensional modeling technique;
• maintained and implemented ETL processes in SQL (PostgreSQL) and Python;
• implemented new ETL processes in Apache Airflow;
• wrote data processing tasks in Apache Spark (PySpark);
• worked with HDFS and Hive;
• participated in the interviewing process for positions of Data Engineer and Product Owner.

Sep 2014 – Aug 2016 · 1 yr 11 mos · Netherlands

• As part of the team, I did the following:
• Upgraded several Ruby on Rails applications from Rails 3.* to 4.*
• Participated in the development of several web applications (with Ruby on Rails).
• Wrote specs (with Rspec, Capybara, Selenium & Poltergeist) for a new product of the company.
• Converted views in core product from HAML to ERB.
• Built charts with D3.js.
• Took part in migrating Eet.nu applications from MySQL to PostgreSQL.
• Developed advanced search functionality based on Elasticsearch.
• Acquired remote working experience.

Mar 2014 – Jul 2014 · 4 mos · Moscow, Moscow City, Russia

• @ Analytical CRM support team

Nov 2012 – May 2013 · 6 mos · The Randstad, Netherlands

• Vastly increased test coverage on legacy applications. For one of the applications test coverage has been increased from ~10% to ~95%.
• Provided maintenance and fixed bugs on legacy and new applications.
• Wrote the specifications, planned and implemented new features on the company's core products.
• Carried out pre-deployment quality assurance.
• Investigated and applied approaches to improve performance of running applications (caching, eager loading, memoization, flame graphs). For one of the application the response time has been decreased from ~200ms to ~70 ms.
• Was a key asset on researching, evaluating and planning the database migration strategy for a master-master setup (migration from MySQL to PostgreSQL).

Sep 2009 – Jun 2010 · 9 mos

• Took part in the implementation of the internal email system and file sharing solution for the Russian Academy of Education. Was responsible for the analysis of possible solutions. The solution was implemented based on Ebox platform (Zentyal) and Ubuntu Linux.
• Was responsible for providing users with help on solving software and hardware related problems.
• Participated in the development of information system for the institute. Was responsible for the analysis of the available open source and commercial information systems, that would fit provided requirements.

Nov 2008 – Aug 2009 · 9 mos

• Developed a catalogue application for PhD students.
• Helped researchers with the information search.