Open to opportunities

Andrii Kosynskyi

@andriikosynskyi

Message

BI Engineer using SQL and BI tools to improve data quality and reporting reliability.

Bulgaria

Message

What I'm looking for

I’m looking for a BI/data role where I can use SQL, Power BI, and troubleshooting skills to improve data quality and reporting reliability—partnering closely with Product and Engineering to resolve incidents fast and prevent repeat issues.

I’m a BI Engineer focused on making reporting trustworthy. I investigate production issues and data inconsistencies reported by business stakeholders, then pinpoint root causes through SQL analysis and system investigation.

In my current work at NDA (Remote), I collaborate with Product and Engineering teams to reproduce, document, and resolve defects that impact reporting and data quality. I also produce clear technical documentation and analytical findings for cross-functional teams, and I’ve helped reduce unidentified traffic entities by ~25% to improve attribution accuracy.

Earlier roles strengthened my operational and technical support mindset: at Digitally Inspired (Part of intellias) I analyzed inconsistencies, built SQL scripts to correct datasets, and used Grafana/Kibana to investigate incidents and monitor performance during on-call shifts. Across L2 support and technical support positions (including SDL Plc and P2H), I optimized monitoring visibility, contributed to internal knowledge bases and self-support articles, and supported development decisions by identifying patterns and recurring issues.

Experience

Work history, roles, and key accomplishments

Current

BI Engineer

Current

NDA (Remote)

Jan 2025 - Present (1 year 6 months)

Investigate data inconsistencies and production issues reported by business stakeholders, using SQL analysis and system investigation to identify root causes. Collaborate with Product and Engineering teams to reproduce, document, and resolve reporting and data quality defects, improving attribution accuracy.

SQL PostgreSQL MySQL Impala Data Quality Root Cause Analysis Technical Documentation Performance Optimization

Application Support Engineer (L2)

Digitally Inspired

Mar 2022 - Oct 2025 (3 years 7 months)

Analyze database inconsistencies and create SQL scripts to correct datasets. Investigate incidents using SQL queries and Grafana/Kibana dashboards, support development decisions with recurring-issue patterns, and maintain reporting on incidents and performance metrics.

SQL Grafana Kibana Data Quality Monitoring Reporting Technical Documentation Knowledge Base

Quality Control Engineer

SoftServe

Jan 2022 - Mar 2022 (2 months)

Focus on Quality Assurance practices including testing methods, SDLC, bug reporting, and test design. Apply knowledge of Software Testing Basics in QA workflows and planning.

Quality Assurance Software Testing SDLC Bug Reporting Testing Design Test Planning

L2 Technical Support

P2H

May 2021 - Mar 2022 (10 months)

Query Grafana/Kibana logs to help development teams identify root causes of issues. Manage database records and run scripts to resolve data consistency issues, configure monitoring for better visibility, and contribute to internal documentation and knowledge base articles.

Grafana Kibana SQL Root Cause Analysis Monitoring Technical Documentation Knowledge Base

Technical Support Engineer

SDL Plc

Mar 2020 - May 2021 (1 year 2 months)

Provide B2B technical product support and coordinate with Customers, Support, QA, and Engineering teams. Review development documentation and provide feedback on customer requirements.

B2B Technical Support Technical Documentation Review

SLS Engineer (L2)

Playtika

Nov 2018 - Mar 2019 (4 months)

Prioritize and manage incoming inquiries across business operations, customer support (L1), and R&D teams. Investigate data inconsistencies by creating SQL scripts and using Grafana/Kibana dashboards, and document resolutions for future reference.

SQL Grafana Kibana Documentation

Application Support Analyst (L2)

Software MacKiev

Jun 2017 - Nov 2018 (1 year 5 months)

Support help desk personnel with complex end-user issues, scheduling analyst team shifts and mentoring help desk staff. Troubleshoot with end users and beta testers using TeamViewer, contributing to the resolution process.

L2 Technical Support Help Desk Troubleshooting Shift Scheduling Mentoring TeamViewer