Do you want to unlock the power of your data?

My name is Olga Bienkowska, and I am an Analytics Engineer with a solid corporate background. I love sport and I work with the same passion and commitment as I train.

I can take you through the steps that help uncover valuable insights and trends in your business. Together we can clean the input data, build pipelines, expose data to data warehouse, and - last but not least - produce dashboards to track the performance daily, so that you can decide on the next steps that help you grow your company.

You’re in the right place.

What can I do for you?

  • Pipeline - from zero to data warehouse

    Together we will identify the necessary data sources, consolidate them together and automate them in a data pipeline to bring you fresh data everyday. You would never have to worry about non-accurate or outdated information again!

  • Data preparation and cleaning

    Unlock the true potential of your data with my data preparation and cleaning services. I’ll help you eliminate inconsistencies, errors, and redundancies to ensure that your data is accurate, consistent, and reliable. My comprehensive approach includes data profiling, transformation, and validation to deliver high-quality data that can be used with confidence for analysis, reporting, and decision-making. Let me take care of the data, so you can focus on your business.

  • Custom-tailored Tableau dashboard

    Create an advanced Tableau dashboard that shows the KPI of your choice on a daily basis. I'll help you gain a deeper understanding of your business by creating interactive and visually appealing visualizations that provide valuable insights and drive informed decision-making. Let's work together to unlock the potential of your data and take your business to the next level.

  • Create custom reporting sent via a Slack message

    Stay on top of your business with a custom reporting services delivered directly to your Slack channel. I’ll work with you to design and automate reports that provide insights into key performance indicators, trends, and anomalies. My reporting solution is tailored to your unique business needs and can be customized to include a variety of data sources and formats. With my Slack reporting service, you'll have the information you need to make informed decisions at your fingertips, anytime and anywhere.

Current & Previous Clients

With Toptal, I have been involved in different types of projects under three contracts. 

  • Senior Data Analyst: as part of that contract, I am responsible for:

    • Creating CI/CD checks for GitHub PRs

    • Writing DAGs in Cloud Composer that triggers Dataform projects, reads logs from Dataform API and sends alerts on Slack

    • Deployment of ML models as part of Dataform cycle in Google Cloud Platform

    • Serving as SME in two business areas and handles all data-related questions for these

    • Mentoring business analysts to help them improve the code quality 

  • Data Analyst: as part of that project, I:

    • Built 100+ tables in Dataform project along with assertions and data quality checks 

    • Massively optimized the queries and significantly cut building and querying costs

    • Designed, developed, and maintained data models for data transformation and analysis

    • Created custom alerting system for sensitive data usage (SQL + Python + Slack API)

    • Created and maintained data documentation, including data dictionaries and process flows

  • Tableau Report Developer: during that contract, I was responsible for developing a set of company-wide, standardized dashboards that massively improved company KPI tracking.

Cinema Under The Rams (Kino pod Baranami) is a Polish arthouse cinema.

I helped them with:

  • Collecting and evaluating data such as revenue and audience details from the cinema’s internal system

  • Analyzing the data and preparing a thorough audience analysis to understand its behavior and performance of the business

  • Preparing a custom report using Plotly library along with a set of recommendations

My skillset includes:

  • strong programming skills in SQL and Python

  • extensive experience using data transformation framework (Dataform)

  • proven track record in building DWH from scratch

  • building DAGs in Cloud Composer

  • full proficiency in data visualization (Tableau)

  • data  modeling, data validation & unit testing

  • full stack development of a custom Slack app sending database updates

  • data modeling (snowflake and star schemas)

  • data validation & unit testing

  • data quality (i.e. writing assertions)

Data stack:

Google Cloud Platform (mainly BigQuery, Cloud Composer), GitHub, Dataform, Tableau