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Oleksii Y.

Offer Oleksii work on your next project.

Ukraine Odessa, Ukraine
3 hours 40 minutes back
A little busy a little busy
9 Safes completed
5 months 3 days back
4 clients
1 proposal made
on the service 2 years
  • database
  • selenium
  • PowerBI
  • pandas
  • JSON & XML
  • lxml
  • data engineering
  • ETL Pipeline
  • WordPress
  • Power BI
  • Looker Studio
  • telegram bot
  • Google BigQuery

Rating

Successful projects
100%
Average rating
10 out of 10
Rating
1466
Python
100 place out of 4453
Databases & SQL
26 place out of 1205
6 projects
Web Programming
3 projects
Python
1 project
Mobile Apps Design
1 project
Bot Development

Language proficiency level

Українська Українська: fluent
Русский Русский: advanced
English English: upper-intermediate

Skills and abilities

Portfolio


  • 250 USD

    Dashboard for customer and product analytics for the B2C segment

    Data Processing
    Development of an analytical report that includes processing raw data in #DWH and visualizing complex business metrics.

    Key functionalities:
    — Geographic Insights: interactive maps of warehouses and distribution centers;
    — Operational Analytics: monitoring order statuses, analyzing the share of canceled and returned orders;
    — Demographics & Sales: cross-analysis of brands and categories by age groups and gender of customers.

    Technical part:
    — Writing complex SQL queries in BigQuery;
    — Cleaning dirty data (processing text null values, normalizing cities).
    — Creating #metrics in Looker Studio for dynamic grouping (Age Buckets, ARPU, etc.).

    The tool allows the business to see not only "how much we earned" but also "who our customer is" and the load on logistics centers.

    #BigQuery, #SQL, #LookerStudio, #DataVisualization, #Analytics, #BusinessIntelligence
  • 350 USD

    ETL pipeline for forecasting (ERP -> BigQuery -> Power BI)

    Enterprise Resource Planning (ERP)
    #Data-Platform for automating procurement forecasting in a manufacturing company.

    Complete development from scratch: architecture design, building #ETL pipeline, integration with #ERP, and setting up an analytical dashboard.

    Data integration:
    — connection to ERP via #REST API
    — incremental data loading while preserving history
    — API error handling (retry, logging)
    — integration of ARIMA model (#R-script) with BigQuery

    Storage and processing:
    — design of #DWH in BigQuery
    — calculation of product balances by warehouses
    — transformation of raw data into analytical tables

    Automation:
    — launching #ETL processes on schedule (#GCP Cloud Scheduler)
    — nightly #pipeline: data update —> model execution —> report update

    Visualization:
    — building new and adapting existing dashboards in Power BI for analysis of balances and forecasts

    Features:
    — replacement of manual accounting in Excel
    — stable daily data updates without manager involvement
    — minimized data discrepancies between ERP and #BI after extensive testing

    Stack: #Python, #BigQuery, #GoogleCloud, #PowerBI, #RScript, #REST, #Docker
  • 750 USD

    Work Accounting System (PWA) with Admin Panel and PDF Reports

    Web Programming
    #PWA application for internal use in a Norwegian construction company.

    Full development from scratch: UX/UI design, #Frontend and #Backend.

    Backend:
    — development of the system on Django + PostgreSQL
    — designing the database structure
    — processing and storing data on completed work

    Frontend:
    — implementation of the interface (HTML, CSS) based on custom design (Figma)
    #mobile-first approach (PWA for use without installation)

    Functionality:
    — accounting for completed work (time, tasks, details)
    — employee work through the mobile interface
    — data synchronization between users

    Admin panel:
    — control and verification of completed work
    — management of projects and employees
    — automatic generation of daily #PDF reports

    Features:
    — system optimized for use in field conditions by employees (minimum number of actions for filling out reports)
    #production solution used in real work

    Stack: #django, #PostgreSQL, #HTML/CSS/JavaScript, #JavaScript, #Figma.
  • 101 USD

    Parser auto.ria.com (+ phone numbers)

    Data Parsing
    Parser that collects all active cars from auto.ria.com, + phone numbers of sellers. Data is stored in MySQL.

    Stack:
    * Python (Requests, Beautiful Soup 4)
    * MySQL.
  • 41 USD

    Parser of listings from realtylink.org

    Data Parsing
    My task was to create an asynchronous real estate listings scraper. The data is stored in a JSON object.
  • 45 USD

    ETL pipeline

    Databases & SQL
    My task was to create an ETL process that loads data from a .CSV file, transforms and cleans it, loads it into a PostgreSQL database, and several SQL queries for analysis. Also, for convenience, the cleaned data is stored in a .CSV.
  • 45 USD

    Car parser from auto.ria.com

    Data Parsing
    My task was to create a parser for a specific car brand and a Telegram bot that will notify the channel about new listings for the sale of this car. If the price of the car changes, the bot informs about it. Each listing was stored in a local database.
  • 45 USD

    Parser Advertisements from Olx

    Data Parsing
    Program for data parsing from “olx.ua/”.

    The console enters a link to the category of ads from which you need to get information, after which data collection begins. The following data were collected: name, category, price, number of reviews, date, area and link to the current announcement.

    All information is added to the database (PostgreSQL).
  • 34 USD

    Parser reviews from eldorado

    Data Parsing
    The program collects all reviews from the eldorado.ua store products and collects data in json.
  • 45 USD

    Parser with data storage in XML file

    Data Parsing
    My task was to create an online store parser that will store all the data in the XML file. Parser collected products from different categories that are available, and added only those that are not yet in the base.

Reviews and compliments on completed projects 9

31 December 2025 169 USD
Development of Data Platform solution and automation of forecasting (ERP -> DWH -> Power BI)

Quality
Professionalism
Cost
Contactability
Deadlines

Olexiy is a attentive and client-oriented specialist. He did an excellent job with setting up the API exchange and writing a custom script for our needs. I recommend him for collaboration.

26 September 2025 143 USD
Need help with inmport google sheets

Quality
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Working with this specialist was an excellent experience. He quickly understood the task, delivered everything exactly as agreed, and documented the process clearly with a well-structured solution. Communication was professional, responses were fast and precise, and the project was completed on time without any issues. I can confidently recommend him if you are looking for a reliable and responsible developer.

6 August 2025 140 USD
We’re looking for a UI/UX designer to create a simple and modern design

Quality
Professionalism
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Oleksii did a fantastic job designing our internal reporting web app for a construction company. He delivered clean, modern, and mobile-first layouts that perfectly matched our brief – blue/gray/white style, rounded UI elements, and simple structure for login, dashboard, and report submission.

24 June 2025 130 USD
We need to develop a custom shipping method similar to Omniva

Quality
Professionalism
Cost
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Deadlines

We are very satisfied with the developer’s work on this project. The custom shipping method was implemented in line with our expectations and integrates seamlessly with our existing phone buy-back form.

✅ Parcel terminal list was successfully pulled from Omniva (or a similar service),
✅ The user experience is smooth — customers can easily select a terminal during the phone submission process,
✅ Terminal selection is fully functional and works well both in dropdown and interactive mode (if map-based was used),
✅ The optional phone number input feature was also included and works properly for tracking and/or confirmation SMS.

Communication throughout the project was clear and professional. Deadlines were respected, and the developer proactively offered improvements that enhanced the final result. We appreciated the attention to detail and understanding of our workflow.

Would definitely recommend and work together again on similar custom integrations.

⭐️⭐️⭐️⭐️⭐️

11 June 2025 40 USD
Adding new features and improvements to the XML feed Product project.

Quality
Professionalism
Cost
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Oleksii is a smart and reliable programmer. He quickly understood the technical requirements and delivered exactly what I needed. Communication was easy and professional, and the work was done on time. Highly recommended!

12 May 2025 80 USD
Adding new features and improvements to the XML feed Product project.

Quality
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Absolutely Outstanding Experience!

Oleksii was incredibly patient and professional throughout the entire project. We had several requests and changes along the way, and he handled everything with calm, precision, and excellent communication. His technical knowledge and dedication are top-tier. We are truly grateful for his work and will definitely be hiring him again for future tasks. Highly recommended!

Quality
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Working with Oleksii has been an excellent experience. He is extremely patient, detail-oriented, and truly committed to delivering high-quality results. Throughout the project, he communicated clearly and consistently, ensuring every part of the task was completed perfectly. His professionalism and dedication make him stand out—highly recommended for any project!

11 March 2025 23 USD
Parsing

Quality
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Cost
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Deadlines

A good approach to work, diligently and on time completed the parser.

Quality
Professionalism
Cost
Contactability
Deadlines

Very pleased with the work and the approach to details. I'm glad I got to Alexy because the work was done quickly and as it was right.

Activity

  Latest proposals 10
Olx notification Personal project
90 USD
Parsing supplier prices
113 USD
Development of Data Platform solution and automation of forecasting (ERP -> DWH -> Power BI) Personal project
169 USD
Looking for experienced developer Personal project
4996 USD
Need help with inmport google sheets Personal project
143 USD
We’re looking for a UI/UX designer to create a simple and modern design Personal project
140 USD
We need to develop a custom shipping method similar to Omniva Personal project
130 USD
Adding new features and improvements to the XML feed Product project. Personal project
40 USD
Adding new features and improvements to the XML feed Product project. Personal project
80 USD
Automate XML Feed Product Update for WooCommerce
120 USD