Welcome to Data Analysis Journal

Go behind the scenes of genuine data analysis and data storytelling.

Data Analysis Journal bridges the gap between academic knowledge and industry requirements.

Being data-driven and knowing technologies is not a cutting-edge advantage anymore, but rather a competitive expectation for many companies. It makes analysts rush, losing the sense of clarity and purpose.  

Data Analysis Journal is your place for inspiration, guidance, tips, solutions, and “health check“. 

You may have an excellent theoretical background, but if you can’t ace A/B interview questions or connect user growth with revenue impact in your next quest for a promotion, you haven’t mastered the basis of data analysis. That’s what this journal is for. I want to help you grow and upskill

My story

I’m Olga, a Senior Lead Data Analyst and big data enthusiast, born in Ukraine and based in San Francisco. I’m an analyst at heart and by choice and believe that math rules the Universe.   

When I completed my postgraduate studies, I was full of dreams and knowledge, but I still lacked the terminology to converse with interviewers and was speaking a language that people didn’t understand (literally).

The problem was not because I couldn’t pronounce “consecutive” (I still can’t), but because I didn’t know how to position myself, what it is expected from an analyst, what or even where to research case studies, and didn’t have the network of connections to learn or get guidance from.

That’s why Data Analysis Journal has pointed, relevant, and easy-to-read content. With over a decade of trial and error, I know what good or bad analysis practice is, what framework to use to solve a challenge, what interviewers look for, and how to survive juggling many projects at once.

Packed with content

When you subscribe to Data Analysis Journal, you will receive exclusive weekly content, including newsletters, tutorials, cheat sheets, case studies, interview questions, and insights with experienced analysts who have valuable knowledge to share.

You’ll have the opportunity to learn from experts who are as passionate about data analysis as I am. When you read about their paths to success, you’ll realize that this job is anything but boring.

If you have the time, you can also read my longer articles, which take a deep dive into data acquisition, cleaning, analysis, and visualizations. You’ll find plenty of impactful stories and lots of humor, too. 

What readers say

“Olga's data analysis journal helped me switch careers from consulting to Tech because I was able to develop a Product analytics mindset through her articles on user retention, cohort analysis, product adoption, and SQL Interview questions.“ - Sangamitra, Product Analyst

“In addition to being full of resources, Olga's newsletter provides a crucial framework for understanding the practice of data analysis. Read it to gain insight into real-world analytics problems and find ways to improve your own skills.” - Lira, Analytics Manager

“Olga's newsletter is a one-stop-shop for all of your data-related resources, whether you're starting out new in the industry or a seasoned data enthusiast - you'll find great information that'll help expand your data world! I love the wide variety of topics this newsletter covers that you'll be sure to learn something new from it. I'm so glad to have this newsletter as a resource when I transitioned into the industry last year. I call this my e-mentor! “ - Helen, Data Scientist

“I’m a PM, and I always struggled with analytics. This journal provides the right guidance for me like - what to look for running tests, conversions to track, rates and metrics to know. Must read for every Product Manager.” - Jonathan, Product Manager

“I’ve been reading Olga’s newsletter for as long as I can remember. As someone new to the industry her newsletter felt like having a personal data mentor showing me the do’s, don’ts, and what’s new in the industry. It’s a must-read for anyone starting out in the industry or wanting to keep up in the industry i.e everyone!” - Adaobi, Analyst

“I find the Journal is quite helpful for staying in the loop of things. With how fast-moving technology is, it can be quite difficult to keep track of everything that’s happening out there. Having a newsletter compile all the interesting tidbits helps immensely. Also good for browsing through other’s projects for inspiration, or reading interesting data stories!” - Aaisha, Data Scientist


*If your university or company would like to purchase a group subscription (minimum three people) at a discounted rate, please contact me at olga@berezovsky.me

**If you are looking for a job, and can’t afford a paying subscription at the moment, please email me, and we will set you up!

I love what I do, and my mission is to show you just how exciting and impactful data analysis can be.