Data Engineer with an MSc in Electrical Engineering and Computer Science. Proficient in Python and SQL, specializing in problem-solving, model selection, ETL processes, and dataset preparation. Skilled in managing end-to-end processes, ensuring high-quality model estimates from raw data. Committed to delivering fast and efficient solutions tailored to meet customer requirements. Highly motivated, quick learner, and effective team player, capable of working both independently and collaboratively.
Portfolio
Diploma Thesis
Machine Learning
Python
PyTorch
AWS Daily Incremental ETL
Lambda
Glue
S3
Athena
Cloudformation
Top Skills in Data Engineer Job Listings
Python
Airflow
Selenium
Docker
Job Interview Assignment
Python
SQL
Docker
PostgreSQL
FastAPI
Skills
Programming Languages
Python
SQL
Bash
C
C++
Go
HTML
Operating Systems
Linux
Mac
Windows
Data
ETL
Data Modeling
Data Warehousing
Data Quality
Data Analysis
Data Security
Key Technologies
AWS
Docker
Airflow
dbt
Kafka
Git
IaC
Kubernetes
CI/CD
SQL
NoSQL
FastAPI
SSIS
Ansible
PowerBI
Agile
Tools & Frameworks
PyTorch
PySpark
Selenium
TensorFlow
OpenCV
Scikit-learn
Pandas
Resume
Summary
Jason Kaltsikis
Education
Integrated 5-year Master in Electrical Engineering & Computer Science
September 2017 - July 2022
Democritus University of Thrace, Xanthi, Greece
· Majored in Electronics and Programming
· Diploma Grade: 7.87/10
Diploma Thesis: ”Semantic image segmentation using depth estimation”
· Grade: 10/10
· Significantly enhanced the base model, achieving a remarkable 5% performance gain, and contributed
to the advancement of state-of-the-art research.
Certifications
AWS Certified Data Engineer – Associate
February 2024 - February 2027
In-depth understanding of how to use AWS services to implement data pipelines and to monitor, troubleshoot, and optimize cost and performance issues in accordance with best practices. Familiarity with ingestion, transformation, modeling, security, governance, privacy, schema design, and optimal data store design.
Professional Experience
Data Engineer
October 2022 - February 2025
Margera, CY
- Consulting as a Data Engineer for IT & CX Team at Phillip Morris International, Greece.
- Designing and implementing robust ETL pipelines to ingest and transform data from diverse sources.
- Collaborating with cross-functional teams to gather and analyze data requirements for business insights.
- Developing data quality checks and validation procedures to maintain clean and consistent datasets.
- Exporting consumer lists for targeted communications and reporting.
DevOps Engineer
January 2022 - June 2022
SphearsAI, GR
- Managed server infrastructure and PostgreSQL databases, ensuring high availability and security.
- Developed and maintained CI/CD pipelines for automated building, testing, and deployment.
- Built, configured, and orchestrated Docker containers for seamless application deployment and scaling.
- Developed FastAPI application for efficient database interactions.
Flutter Developer
November 2020 - September 2021
Overdog, GR
- Developed, tested, and optimized a mobile application using the Flutter framework.
- Oversaw design updates, bug fixes, and maintenance throughout the product lifecycle.
- Managed the project repository and version control using Git
Books
About
Data Engineer with an MSc in Electrical Engineering and Computer Science. Proficient in Python and SQL, specializing in problem-solving, model selection, ETL processes, and dataset preparation. Skilled in managing end-to-end processes, ensuring high-quality model estimates from raw data. Committed to delivering fast and efficient solutions tailored to meet customer requirements. Highly motivated, quick learner, and effective team player, capable of working both independently and collaboratively.
Data Engineer | AWS Certified Data Engineer
Degree: Integrated Master
Email: jkaltsikis@duck.com
Location: Greece