Balazs Arva - Data Engineer Portfolio

Balazs Arva

Data Engineer

Building reliable data pipelines and warehouses, with a growing pull toward full-stack.

Projects

Showcasing impactful projects and technical achievements.

SpendPilot
SpendPilot

Cost Optimizer SaaS.

Web Dev
Full Stack
UI/UX
StackPilot
StackPilot

Interview and exam preparation application.

Web Dev
Full Stack
UI/UX
Harmónia
Harmónia

Private clinic website with online booking and an AI assistant.

Web Dev
Full Stack
UI/UX

Experience

Professional journey and career.

Independent Developer

Self-employedBudapest, EU
2026 - Present

Building and shipping my own web products end to end – SpendPilot, StackPilot and client sites – from data model and backend to auth, payments and deployment, using AI-assisted development.

Next.jsReact+5 more
EPAM Systems

EPAM Academy – Data Engineering Training

EPAM SystemsBudapest, EU
2025 - 2026

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.

PythonPostgreSQL+4 more

Full-time Student

Self-employedBudapest, EU
2023 - 2025

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.

Python

Skills

Key skills that define my professional identity.

Git/GitHub

Tracking code history with version control and pull request workflows.

Python

Write scripts and data pipelines compliant with coding standards.

PostgreSQL

Design and manage robust relational databases (DWH) using Inmon's methodology.

API/Webhooks

Design and consume HTTP APIs, and handle webhook events pushed from external systems.

Next.js

Effortlessly build dynamic apps with routing, layouts, loading UI, and API routes.

React

Craft interactive user interfaces using components, state, props, and virtual DOM.