// Data engineer

Balazs Arva

Building reliable pipelines and cloud data warehouses — with a growing pull toward full-stack engineering.

About

I'm a dedicated data engineer currently seeking a junior data / integration / visualization / quality engineer role. My background has strengthened my discipline, adaptability, and problem-solving skills, and I'm passionate about building reliable data systems through real-world projects and collaboration.

Skills

  • Git & GitHub
  • PostgreSQL
  • Python
  • React
  • DWH-DM concepts
  • ETL / ELT
  • Power BI, DAX
  • AWS & Azure
  • DQ, TestRail, Jira
  • CI/CD, Docker

Experience

  1. 2025 — now

    EPAM Systems — Data Engineering Program

    Focused on PostgreSQL (DDL/DML/DCL/TCL) and advanced warehouse design, building a DWH project on the Inmon approach (3NF core + data marts). Covered indexing, VACUUM, MVCC, isolation levels, and stored procedures.

    Hands-on with AWS: EC2, S3, Glue/Glue Catalog, Athena, Aurora, Redshift, and Bastion Host access. Automated ETL/ELT pipelines and built reporting in Power BI, with Python for scripting and data processing.

  2. 2023 — 2025

    Full-time Student & Courier

    Studied Python development, software engineering, and data science full-time, while working as a courier — building time management, reliability, and problem-solving skills alongside it.

  3. 2019 — 2023

    Courier

    Developed strong organizational skills, resilience, and the ability to adapt quickly to changing situations.

  4. 2014 — 2017

    Sales Manager — CNW Rendszerintegracios Zrt.

    Managed IT hardware and software sales for existing partners, building client relationships and negotiating contracts.

Projects