Оleksandr

ALEKSANDR KOZHYN
Data Analytics Engineer
SQL | Power BI | Grafana | AWS Athena | PostgreSQL | InfluxDB | Python
Location: Lviv region, Ukraine
LinkedIn: [open contact info](look above in the "contact info" section)
Email: [open contact info](look above in the "contact info" section)
Phone: [open contact info](look above in the "contact info" section)
PROFILE
Data Analytics Engineer with experience in SQL, Power BI, Grafana, AWS Athena, PostgreSQL, InfluxDB, Flux, Python, and analytical data
automation. Skilled in building dashboards, preparing and transforming data, designing analytical data models, configuring monitoring
and alerting, and automating reporting workflows.
Strong background in payment analytics, conversion monitoring, call center analytics, marketing analytics, operational reporting, and data
quality investigation.
TECHNICAL SKILLS
Data & Analytics: SQL, data extraction, data transformation, data validation, analytical datasets, business metrics, scheduled data
exports, data quality checks
Databases: PostgreSQL, MS SQL, AWS Athena, InfluxDB 2.0, Flux
BI & Visualization: Power BI, Power Query, DAX, Grafana, Kibana ELK, Tableau, StimulSoft
Programming & Tools: Python, Pandas, Jupyter Notebook, Google Colab, CSV, Parquet, Google Sheets, Git, Jira, Confluence
Monitoring: Grafana Alerting, threshold-based alerts, traffic monitoring, conversion monitoring, callback failure detection
WORK EXPERIENCE
Conversion Analyst / Data Analytics Engineer
4bill.io | Feb 2024 – Oct 2025
Stack: SQL, Python, Power BI, Grafana, AWS Athena, PostgreSQL, InfluxDB, Flux, DAX, Power Query
Built Power BI and Grafana dashboards for payment conversion, transaction statuses, provider performance, account activity,
service metrics, and operational traffic.
Designed Power BI analytical models with table relationships, DAX measures, Power Query transformations, and reusable
business metrics.
Automated data collection and export workflows using Python and AWS Athena for recurring Power BI reporting.
Developed Python, SQL, and Flux logic to collect, transform, aggregate, and validate transaction, callback, provider, and time-
series data.
Configured Grafana alerts for conversion drops, traffic anomalies, failed callbacks, provider issues, and abnormal transaction
behavior.
Senior Technical Support Specialist
Expert Solution | Sep 2021 – May 2023; Jul 2016 – Apr 2020
Stack: SQL, MS SQL/PostgreSQL, StimulSoft, server administration, backup & recovery, troubleshooting
Created custom operational and business reports based on client-specific requirements.
Worked with application data and databases to investigate issues, prepare reports, and support client operations.
Maintained server-side software environments, including installation, configuration, deployment, backup, and database recovery
procedures.
Diagnosed technical issues related to software behavior, user access, data availability, system configuration, and reporting
inconsistencies.
Technical Support Specialist L2 / Call Center Analytics Specialist

Webitel |Aug 2020 – Sep 2021
Stack: Kibana ELK, SQL, Grafana, IP telephony, IVR, CRM integrations, Jira
Developed call center analytics dashboards and visualizations mainly in Kibana, including operational metrics, agent activity, call flows,
and service performance indicators.
Supported IP telephony servers and contact center systems, including configuration, troubleshooting, IVR setup, and CRM integrations.
Worked with call center data and reporting tools to investigate discrepancies, performance issues, and client-specific reporting requests.

FREELANCE PROJECT
Wawi.ae
Freelance
Stack: Power BI, Power Query, Google Sheets, CRM data, Facebook Ads, Google Ads
Designed and delivered a Power BI dashboard with scheduled auto-refresh for marketing and CRM analytics.
Integrated Google Sheets as a reporting source consolidating CRM, Facebook Ads, and Google Ads data.
Cleaned, structured, and transformed source data to build KPI views for leads, advertising performance, CRM activity, and
business trends.

EDUCATION & CERTIFICATIONS LANGUAGES
Robot Dreams — Data Engineering English: Pre-Intermediate (A2+/B1-, actively improving)
Robot Dreams — AI Solutions Architect Ukrainian: Native
Codecademy — Learn SQL Course Russian: Native
Codecademy — Learn Python 3 Course