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Şengülser Aydemir

@sengulseraydemir

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Backend developer focused on ETL pipelines, data integration, and real-time processing.

Turkey

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What I'm looking for

I’m looking to build reliable backend and data pipelines—owning real-time ingestion, ETL, API integrations, and data quality in an agile team that values automation, observability, and measurable accuracy.

I’m a Backend Developer specialized in data integration, ETL pipelines, and real-time data processing systems. I turn unstructured, multi-source data into scalable, reliable backend systems using C#, .NET, Python, Docker, and SQL, with a focus on automation, normalization, and data accuracy.

In my current role, I develop and maintain real-time data ingestion pipelines for energy market data, integrating external APIs and building end-to-end ETL pipelines with validation, aggregation, and idempotent duplicate detection. Earlier, I built a CRM data integration system that reduced guest information retrieval time by ~85% and orchestrated ETL workflows with Apache Airflow, while adding logging, monitoring, and automated notifications to improve data consistency.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

PowerDev

Feb 2026 - May 2026 (3 months)

Developed real-time energy market data pipelines using C#, .NET, PostgreSQL, and Docker. Built ETL processes for API and CSV ingestion with validation, normalization, and aggregation. Implemented idempotent processing, time-series data modeling, and duplicate detection. Containerized services and enabled near real-time data publishing with monitoring and logging.

.NET C#RESTful APIs Backend Development PostgreSQL Data Modeling SQL ETL Pipelines Data Integration data transformation Data Validation Data Aggregation Data Processing Docker Containerization Linux APIs API Integration

Part-Time Intern

PowerDev

Aug 2025 - Feb 2026 (6 months)

Contributed to backend data processing and API integration systems. Gained hands-on experience in .NET-based backend development and ETL workflows.

.NET Backend Development ETL API Integration Backend Data Pipeline Development

Software Support Engineer

GocTur

May 2025 - Feb 2026 (9 months)

Built a CRM data integration system to unify guest data (CSV, Excel, PDF) using Python, n8n, MSSQL, Docker, SharePoint, and Salesforce. Designed ETL workflows with Airflow and n8n for ingestion, validation, and automation. Integrated data into Salesforce CRM, improved retrieval time by ~85%, and implemented error handling, notifications, and document traceability.

Intern

GoçTur

Feb 2025 - May 2025 (3 months)

Developed a web-based reporting system to normalize heterogeneous warehouse data using Flask, Python, MSSQL. Built CRUD interfaces for warehouse and product data management. Designed a system to convert multi-format reports into standardized outputs. Automated collection of hotel ratings from external platforms using Python, n8n, Docker.