Костянтин

KOSTIANTYN GRECHANIUK
Entry-level Technical Support / Application Support Analyst | SQL, Jira & Documentation
Kraków, Poland | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

SUMMARY

Entry-level Technical Support / Application Support candidate with practical training in business analysis and regular practice in SQL, Excel and
documentation tools. Comfortable working with structured information, describing issues clearly, checking data and communicating with users or team
members. Open to trainee, internship, support analyst and junior application support roles.

TECHNICAL SKILLS

Technical Support: Issue analysis, user communication, problem clarification, ticket description, reproduction steps, escalation, support documentation.
SQL & Databases: PostgreSQL, SQLite, DBeaver, pgAdmin, SELECT, JOIN / LEFT JOIN, GROUP BY, HAVING, CASE, aggregations, subqueries, CTEs, basic
window functions.
Business Analysis: User Stories, Acceptance Criteria, Use Cases, requirements analysis, basic process mapping, backlog basics, Kanban. Tools & Data: Jira,
Confluence, Draw.io, Lucidchart, Excel, Google Sheets, Pivot Tables, charts, basic Power BI.

PROJECTS & TRAINING

Business Analysis in IT Course | Beetroot Academy | 2025 - 2026 | 4 months RECCY -
marketplace app for buying and selling new and second-hand clothes
• Prepared business analysis documentation for RECCY, a marketplace app for buying and selling clothes.
• Worked with requirements, user stories, acceptance criteria, use cases, mind maps and backlog structure.
• Created diagrams and process flows to describe user interactions and system logic in a structured way.
• Used Jira and Confluence for documentation, task organization and project workflow. SQL & Data Practice | Self-study / Stepik / Practical
training
• Practiced SQL queries regularly in PostgreSQL and SQLite using customer, product and order datasets.
• Used joins, grouping, aggregations, CASE, subqueries, CTEs and basic window functions to solve practical tasks.
• Built simple queries for checking records, comparing data and preparing short analytical summaries.

EXPERIENCE
Administrative / Cultural Department Internship | Remote Internship | 3 months Vinnytsia City
Council / Department of Culture
• Supported administrative and documentation tasks in a real public-sector organizational environment.
• Structured information, organized working materials and helped prepare simple visual diagrams for selected processes.
• Developed attention to detail, clear communication and the ability to work with formal documentation.

EDUCATION

Jagiellonian University (Uniwersytet Jagielloński) | 2023 - 2026
Bachelor's degree, Intercultural Relations (Relacje międzykulturowe)
Beetroot Academy | 2025 - 2026 | Business Analysis in IT Course (4 months)

LANGUAGES

Polish: C1 (Advanced / Fluent) | English: B1 (actively improving) | Ukrainian / Russian: Native