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Piotr Sidoruk

Piotr Sidoruk


Startup Data Guy


My Portfolio Highlights

My New Course

Credit Risk Modeling in R

My New Course

Python Data Science Toolbox (Part 1)

My New Track

R Programming

Startup Data Guy | Data Science | Data Engineering | Data Analytics

My Work

Take a look at my latest work.


Understanding Data Engineering


Writing Efficient R Code


Building Web Applications in R with Shiny


Introduction to R


Introduction to Python


Intermediate Python

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

My Work Experience

Where I've interned and worked during my career.

Playbook Technologies Inc. | Mar 2020 - Present

Lead Data Scientist / Data Generalist

As a data one man army at a New York-based startup in the fitness industry, I have a proven track record of utilizing data to drive business decisions and uncover new opportunities. I am adept at managing data engineering, data analysis, and data science tasks on my own, and am able to prioritize effectively to meet the needs of the company. I am a skilled communicator and storyteller, having played a key role in our Series A fundraising by providing compelling data-driven insights to investors. With expertise in product analytics, business intelligence, customer engagement, data engineering, statistics, and data warehousing, I am comfortable working with a wide range of tools and technologies, including R, Python, SQL, AWS, and Google Cloud (e.g. BigQuery). With a deep understanding of our company's data, I work closely with our founders and other team members to shape strategy and make informed decisions. I take pride in my ability to work with a diverse set of data sources, including Stripe, DynamoDB, RDS, Redis, Mixpanel, Google Analytics, Clevertap, Flurry, Branch, Braze, and Mailchimp, to find solutions to the most challenging data-related issues. My ability to set up data infrastructure from scratch and my willingness to work with other people inside the startup to help them solve different problems make me a valuable asset to the company.
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Roche | Oct 2019 - Feb 2021

Data Science Consultant

As a Data Science Consultant at Roche, I was responsible for building solutions to automate the work of Medical Writers in the area of documenting clinical trials. I delivered a data processing solution, data visualization and automated content generation algorithms, utilizing the R programming language and a variety of R libraries such as RShiny, rmarkdown and others. My goal was to shorten the amount of time needed to bring drugs to market by streamlining the documentation process and enabling Medical Writers to focus on higher-value tasks. I worked with teams located in Canada, USA, and Switzerland, and had a strong track record of delivering successful projects on time and within budget. My understanding of the pharmaceutical industry and the drug development process allowed me to provide valuable insights and recommendations to stakeholders. I was a quick learner and always looking for new ways to improve my skills and knowledge. I was proud to be a part of the team at Roche, where I was able to make a real impact on improving the lives of patients.

Polskie Technologie | Dec 2017 - Nov 2019

Data Science Consultant

delivering various consulting projects in the field of data analytics, credit risk, and recommender systems. My expertise in programming languages such as R and Python, as well as my experience in machine learning and statistical methods of multidimensional comparative analysis, enabled me to design and implement complex solutions for data manipulation, processing, exploration, visualization, and modeling. I had a proven track record of improving customer assessment processes at some of the biggest financial institutions in Poland through the use of predictive models, feature engineering, and data insights. Additionally, I was a creative problem solver and came up with innovative ideas and MVPs for startup initiatives in the sports betting industry, specifically in the area of recommender systems. I was a highly motivated professional with a passion for using data science to drive business results and improve processes. My experience at PT allowed me to become a skilled data consultant and a valuable asset to any organization.

Rentier Analytics | Jul 2018 - Apr 2019

Data Scientist

As a Data Science Consultant at Rentier, I was responsible for spearheading the company's data and analytics efforts. I was the first data professional on the team and played a key role in shaping the company's data strategy. I was responsible for coming up with innovative ideas for data and analytics products for real estate investors, and was heavily involved in the design and development of real estate analytics reports. These reports were automatically generated and included the most up-to-date real estate trends, as well as detailed and insightful descriptions. My responsibilities included exploratory data analysis, data visualization, reporting, data processing, feature engineering, and running experiments with machine learning models for real estate price prediction. I was able to successfully deliver on these responsibilities and make a significant impact on the company's growth and success.

MYMENU.PL | Dec 2017 - Aug 2018

Data Scientist

As a Data Science Consultant at MyMenu, I was responsible for creating the first version of a recommendation, planning, and optimization engine from scratch for an innovative startup that may be described as "Spotify for food industry." My role included building a database from scratch containing recipes, ingredients, and nutrition facts, and using machine learning techniques to build a powerful engine. I also provided insights related to the database content, suggesting which types of recipes should be added. The project was a great success and the solution was ultimately purchased by a large European store chain company.

www.startupdataguy.com | Jul 2017 - Present

Startup Data Guy

I bring a wealth of experience in data science, engineering and analytics to help startups achieve their business goals. My expertise lies in delivering data- driven solutions to complex business problems, from data infrastructure set up to advanced analytics and machine learning. With over 20 successful projects across a range of industries, including pharma, fitness, crypto, food, retail, real estate, sports betting and financial services, I have a proven track record of delivering results for my clients. As a data generalist, I am passionate about working with startups to help them make better decisions through data-driven insights and build great data-driven products. Let's work together to turn your data into a competitive advantage!

IBM | Oct 2014 - Feb 2016


As a Consultant at IBM, I gained a wealth of experience in software implementation, building Business Intelligence solutions, delivering a Social Media Analytics project as part of an IBM-Twitter partnership, and data modeling. I participated in the Consulting by Degrees program of Global Business Services, a worldwide development program for top performing and talented graduates, and received training on different IT/Business roles and sectors across Europe. I was a part of IBM Global Business Service's Business Analytics and Strategy (BA&S) service line, a European team of over 2000 consultants based in 20 countries. My work at IBM provided me with a holistic understanding of various analytics projects, giving me the opportunity to make better decisions regarding my future career path. I decided to dive deeper into Data Science, and my time at IBM gave me the foundational knowledge and experience to excel in this field.

Lingaro | Feb 2013 - Feb 2014

Associate Consultant

As an Associate Consultant at Lingaro, I had the opportunity to gain a wide range of experience in different roles. My primary responsibility was in Mobile App Store Management, where I served as the single point of contact for issue resolution and consultation for a leading FMCG company. I was responsible for development activities, performing systems and applications tests, and solving technical issues. In addition to this, I also served as a user guide writer, meeting with end users and gathering requirements, coordinating activities, and providing status updates to project receivers. Lastly, I supported BI applications, working closely with operations teams and ensuring data quality. This experience at Lingaro provided me with a solid foundation in various areas of consulting, and helped me develop valuable skills in project coordination, problem-solving, and data analysis. This role helped me to understand the importance of data and how it can be used to drive business decisions.

My Education

Take a look at my formal education

Master's in Quantitative Methods in Economics and Information SystemsWarsaw School of Economics
Master's in PsychologyUniversity of Warsaw

About Me

Piotr Sidoruk

I love working with startups, building data infra from scratch. I'm passionate about building great data-driven products that make people's lives easier.

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