Varga Edvárd

Experience

I'm a data engineer focused on designing and running scalable data platforms across Snowflake, AWS, and Azure. I work end-to-end — from architecture and orchestration to access control and rollout — with an emphasis on reliability, maintainability, and clear data models.

I've led pipeline-engineering work, mentored engineers, and modernized legacy systems into reproducible, well-governed infrastructure.

Bluebird International

Data Engineer

Feb 2025 – Present 1 year, 4 months

BlackRock

Data Engineer Feb 2025 – Present
  • Redesigned the legacy Unix-based Airflow infrastructure from the ground up, improving deployment reliability, environment parity, and developer productivity.
  • Architected and delivered a versioned DAG deployment framework enabling automated, traceable rollouts across dev, prod, and local environments.
  • Developed a secure, reusable Airflow–Snowflake plugin library to standardize multi-layer ETL orchestration and simplify pipeline maintenance.
  • Collaborated closely with engineers and stakeholders to define best practices for data modelling, orchestration patterns, and operational governance
  • Defined and implemented data access control best practices for curated layer utilising RBAC and Snowflake masking policies for handling PII data.
  • Integrated multiple third-party APIs into the new ETL architecture, standardizing data ingestion and transformation processes.
  • Designed the ontology and semantic layer for newly onboarded datasets and implemented Airflow DAGs to orchestrate their end-to-end loading into the data warehouse.
  • Airflow
  • Snowflake
  • Python
  • Data Modelling
  • Unix/Linux
  • API Development
  • ETL/ELT
  • RBAC
  • PII Handling
  • CI/CD
  • Git
  • Infrastructure Design
  • Data Warehouse Design
  • Stakeholder Collaboration
  • Technical Leadership
  • Code Review

HCLTech - Starschema

Data Engineer

Oct 2022 – Feb 2025 2 years, 4 months

World Food Programme (WFP)

Data Integration Specialist Aug 2024 – Feb 2025
  • Designed and maintained PySpark-based ingestion pipelines in Palantir Foundry, integrating data from S3, SAP, and multiple internal and third-party APIs.
  • Rebuilt the social media metrics ingestion stack into an Azure serverless architecture, improving reliability and cutting costs by ~60%.
  • Integrated marketing platform APIs (LinkedIn, YouTube, Facebook, Instagram) via custom Python connectors for unified reporting.
  • Enhanced Airflow orchestration and deployment consistency by introducing reproducible, containerized job environments.
  • Troubleshot and optimized Spark jobs to handle large datasets more efficiently, improving overall pipeline performance.
  • Stabilized AWS Glue and Step Function pipelines to ensure uninterrupted data availability for downstream analytics.
  • Palantir Foundry
  • PySpark
  • Azure Functions
  • Azure Key Vault
  • Azure Blob Storage
  • Azure SQL
  • AWS Glue
  • AWS Step Functions
  • Airflow
  • Python
  • API Integration
  • S3
  • Docker
  • Serverless Architecture
  • Cost Optimization
  • Performance Tuning
  • Problem Solving

BlackRock

Pipeline Engineer Nov 2022 – Aug 2024
  • Served as primary technical contact for the pipeline engineering team, overseeing architecture, delivery, and stakeholder coordination.
  • Developed a Python–Snowflake auditing framework ensuring data completeness, traceability, and anomaly detection in file ingestion workflows.
  • Automated schema management with dynamic Snowflake DDL/DML and data-share generation, accelerating environment setup and migrations.
  • Refactored and optimized legacy Python pipelines to improve reliability and execution time for high-volume data loads.
  • Collaborated with product teams to define and develop usage metrics and data models for business intelligence and reporting dashboards.
  • Python
  • Snowflake
  • SQL
  • DDL/DML
  • Data Quality
  • Data Auditing
  • Schema Management
  • Data Modeling
  • Business Intelligence
  • Code Refactoring
  • Technical Leadership
  • Stakeholder Management
  • Architecture Design

Wizz Air

Financial Data System Specialist

Mar 2022 – Oct 2022 7 months

Controlling

Financial Data System Specialist Mar 2022 – Oct 2022
  • Acted as a bridge between IT and Finance Controlling, identifying system inefficiencies and collaborating with developers and controlling analysts to implement improvements.
  • Centralized the knowledge base for internally developed financial software to improve data quality and accessibility.
  • Developed Python-based calculators that automated invoice and accrual verification, aligning flight data with contractual pricing rules and enhancing process maintainability.
  • Python
  • Process Automation
  • Data Quality
  • Documentation
  • Requirements Analysis
  • Cross-functional Collaboration
  • Stakeholder Communication
  • Financial Analysis

HelloPay

Finance Generalist

May 2018 – Mar 2022 3 years, 10 months

Finance

Finance Generalist Aug 2019 – Mar 2022
  • Directed and automated financial processes utilizing Python, Excel and the internal admin tool API, enhancing productivity and accuracy in financial reporting.
  • Acted as the main point of contact for over a thousand clients in all finance related queries.
  • Participated in the year end closings and forecasts.
  • Data-scraped the file-based reports within the company using Python, Excel, Pandas and OpenPyXL for more insightful and efficient decision making.
  • Handled bank transfers & petty cash daily to ensure payout timeliness.
  • Led end-to-end financial delivery of several hundred full cashless festivals, venues and concerts, from human resource management to preparing cash reserves, up to the financial closure.
  • Python
  • Excel
  • Pandas
  • OpenPyXL
  • API Integration
  • Financial Reporting
  • Process Automation
  • Web Scraping
  • Forecasting
  • Client Relations
  • Event Management
  • Project Management
  • HR Management

Sales

Sales Administrator Jan 2019 – Aug 2019
  • Managed B2B sales of POS systems, including account management and coordination of the sales workflow.
  • Generated business reports from the company database using Excel to facilitate decision-making and strategic planning.
  • Oversaw the management of the contract database, ensuring accuracy and compliance with company policies and procedures.
  • Excel
  • B2B Sales
  • Account Management
  • Business Reporting
  • Contract Management
  • Client Communication
  • Strategic Planning

Finance & HR Operations

Finance & HR Colleague May 2018 – Jan 2019
  • Managed financial closing for full-cashless projects and POS systems across business units, ensuring accuracy and compliance.
  • Handled the collection, filing, and processing of both incoming and outgoing invoices to maintain financial records.
  • Maintained petty cash records and facilitated bank transfers to support day-to-day financial operations.
  • Prepared and analyzed financial reports to provide insights into the company's financial performance.
  • Led the hiring process and assembled necessary workforce for projects, ensuring the team's alignment with project goals.
  • Provided training and coordinated the workforce to ensure proficiency and efficiency in project execution.
  • Reported labor force data to the accounting department, supporting accurate financial reporting and analysis.
  • Financial Closing
  • Invoice Processing
  • Accounts Payable
  • Accounts Receivable
  • HR Management
  • Recruitment
  • Training & Development
  • Workforce Planning
  • Financial Reporting
  • Financial Analysis