Valentin Grechany
Offer Valentin work on your next project.
Private message 
Poltava,
Ukraine
11 months 19 days back
available for hire
1 Safe completed
1 year back
1 client
age 19 years
on the service 1 year
Rating
Successful projects
Average rating
Language proficiency level
Українська: fluent
English: intermediate
Skills and abilities
Programming
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Databases & SQL
from 5 USD for project
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Python
from 5 USD for project
Design & art
Services
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Data Processing
from 5 USD for project
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Enterprise Resource Planning (ERP)
from 5 USD for project
Portfolio
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A/B test of the subscription screen
Data Processing#python #pandas #SciPy #Statsmodels #seaborn #Mathplotlib #dataanalysis #ABtest
Full project description:
https://github.com/valenthr/ABtest_analysis
- statistical significance was determined (using t-test and z-test to confirm the result) of the difference between subscription screen designs;
… - user engagement effectiveness was established for each design;
- correct decisions were made based on the data.
The main goal is to increase the CR in subscriptions using the new subscription screen design.
Tools and skills: A/B testing, Python libraries: Pandas, Scipy, Statsmodels, Matplotlib, Seaborn.
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Analysis of credit applications
Data Processing#python #pandas #seaborn #Mathplotlib #dataanalysis
Full job description:
https://github.com/valenthr/credit_applications_analysis/tree/main
- calculated the credit applicants' rating based on 8 criteria;
… - made the correct selection of applicants to minimize risks based on the rating;
- found correlations and valuable insights regarding loan amount, age, gender, education, industry, and location.
Goals:
1. Optimize the process and minimize risks when approving loans.
2. Identify patterns in the applicants' data.
Tools and skills: Python libraries: Pandas, Mathplotlib, Seaborn
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Analysis of sales from Google Merch Store
#analysis #product #analytics #visualization #data #SQL #BigQuery
Full description -https://github.com/valenthr/purchase_funnel
- a sales funnel was created and user drop-off points were identified;
- problem areas in the funnel and the effectiveness of each advertising source and campaign were identified;
… - the degree of dependence between engagement metrics and purchases was revealed;
Main goal: increase conversion and sales.
Tools and skills: SQL (BigQuery), product analytics, advertising campaign analysis.
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Analysis of marketing campaigns
Data Processing#analysis #product #analytics #visualization #data #SQL #PostgreSQL #BigQuery
Full description -https://github.com/valenthr/ad_campaigns
- the most effective advertising sources were identified;
- the effectiveness of advertising campaigns was studied by month.
… Goals:
- determine the effectiveness of campaigns and sources (by advertising metrics such as CPM, CPC, CTR, ROMI, etc.);
- improve advertising strategies and optimize marketing efforts.
Tools and skills: SQL, Looker Studio, advertising campaign analysis
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Analysis of player behavior in online games
Data Processing#analysis #product #predictive #analytics #visualization #data #Tableau #GoogleSheets
Full project description: https://github.com/valenthr/gameusers/blob/main/README.md
Valuable insights into user behavior were obtained, which helped optimize the user journey and retention. To achieve this:
- data was collected and analyzed to assess key metrics (DAU, WAU, stickiness, ARPPU, retention, etc.);
… - patterns of behavior and user retention were identified through cohort analysis;
- predictive models were used to forecast future metrics;
- visual reports and dashboards were created for clear presentation of information, facilitating data-driven decision-making.
Goals: optimize business strategies and improve product effectiveness.
Tools and skills: Tableau, Google Sheets, product analytics, predictive analytics.
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Analysis of music listeners' behavior
Data Processing#analysis #product #analytics #visualization #data #Amplitude
Full project description: https://github.com/valenthr/music_listeners_behavior
1. An onboarding funnel was built.
2. A dependency of the time spent on its completion was identified with the operating system, date, and day of the week.
… 3. User drop-off points were studied.
4. The effectiveness of the funnel, retention, and user engagement level were established.
The main goal is to find patterns in user behavior.
Tools and skills: Amplitude, product analytics
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Analysis of SaaS company revenue
Data Processing#analysis #product #analytics #visualization #data #Tableau
Full project description: https://github.com/valenthr/SaaS_revenue_analysis
Tools and skills: Tableau and product analytics.
Essence: analysis of product revenue by date and location.
… Brief job description:
1. Analyzed data on the revenue of the SaaS company for the year.
2. Customer behavior patterns were identified using cohort analysis.
3. Problem areas in the customer journey were identified that significantly reduced customer retention.
Reviews and compliments on completed projects 1
20 December 2024
23 USD
Set up data visualization in Looker
Quality
Professionalism
Cost
Contactability
Deadlines
Well done and quickly completed work
I recommend!
| Activity
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Looker Studio Dashboard MMR Analytics
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Looker Studio Dashboard MMR Analytics
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PowerBI consultation
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A person is needed in Slovakia for conducting a phone survey.
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Analyst for dashboard setup
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Creating a beautiful, structured, and easy-to-read table in Excel
11 USD
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Format and create a Google Sheets template
11 USD
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Editing Excel databases (data matching)
11 USD
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Need to calculate the P&L of the digital/marketing company
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Develop a marketing dashboard on Zoho Analytics
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