Open to opportunities

Aruna Dilshan Rathnayake

@arunadilshanrathnaya

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Data engineer specializing in scalable ETL, cloud platforms, and big data optimization.

Sri Lanka

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What I'm looking for

I seek data-engineering roles where I can design scalable ETL pipelines, optimize cloud costs, mentor teams, and deliver production-grade data platforms supporting analytics and ML

I am a data engineer with hands-on experience designing and optimizing scalable ETL pipelines and big-data platforms across cloud and on-premise environments. I have delivered cost-saving solutions, reliable ingestion workflows, and data platforms that accelerate data science and analytics delivery.

At Alibaba KOKO and Commercial Bank of Ceylon Tech Solutions I built distributed data solutions using Hadoop, Spark, Airflow, ODPS, and cloud services, reduced processing costs by 40%, and improved testing and deployment efficiency for data-driven projects. I lead technical design, implement CI/CD and secure data access, and collaborate closely with cross-functional teams to turn business needs into production-grade data systems.

I am currently completing an MSc in Data Science & AI and bring a practical full-stack background from web development to data engineering, with a strong focus on automation, monitoring, and maintainability to support analytics and ML workloads.

Experience

Work history, roles, and key accomplishments

Current

Data Engineer

Current

Alibaba Group - KOKO

Mar 2025 - Present (8 months)

Designed and optimized scalable ETL pipelines on Alibaba Cloud (DataWorks, DataStudio, ODPS), automating ingestion from MySQL and replacing BigQuery processing to reduce costs by 40% while improving data reliability for business workflows.

Alibaba Cloud Python Pandas ETL Data Ingestion Cost Optimization Data Automation

Data Engineer

Commercial Bank of Ceylon Tech Solutions

Nov 2023 - Mar 2025 (1 year 4 months)

Built distributed, highly available data platforms (Hadoop/HDFS/Spark/Jupyter) and automated ETL with Airflow, Sqoop and Spark, supporting a 200% increase in data science workflows and delivering secure, scalable pipelines for cross-sell analytics.

Hadoop HDFS Spark Apache Airflow Sqoop Pyspark SQL CI CD Data Warehousing Data Security

Web Developer

Webscept Solutions

May 2022 - Nov 2022 (6 months)

Developed e-commerce and showcase websites using WordPress, WooCommerce and Elementor, delivering timely project releases and improving user experience for administrators and customers.

WordPress WooCommerce Elementor PHP JavaScript Agile Frontend Development UX Project Delivery

Web Developer

Ebranding Bizsolutions

Mar 2022 - May 2022 (2 months)

Led backend development for a POS system using Django and Django REST Framework, contributed React front-end work, and built a full-stack e-learning platform with PHP and MySQL supporting secure payments and course management.

Python Django Django REST Framework React PHP MySQL REST APIs Full Stack Payment Integration

Freelance Developer

Freelance Projects

Mar 2022 - May 2022 (2 months)

Delivered a social media platform for bike riders in North America, performing QA, load testing (JMeter) and performance optimization (Lighthouse) to improve website performance by 30% and user satisfaction.

Performance Testing JMeter Google Lighthouse QA Web Development Client Communication Deployment

Education

Degrees, certifications, and relevant coursework

University of Moratuwa

Master of Science, Data Science & Artificial Intelligence

2024 -

Pursuing an MSc in Data Science and Artificial Intelligence focusing on advanced data analytics, machine learning, and AI applications.

Staffordshire University

Bachelor of Science (Hons), Computer Science

2021 - 2022

Grade: Second-Class Upper Division

Completed a Bachelor of Science (Hons) in Computer Science with a Second-Class Upper Division, specializing in software engineering, AI, and computer systems.

APIIT (Asia Pacific Institute of Information Technology) / BTEC HND

BTEC Higher National Diploma, Computing (Software Engineering)

2019 - 2021

Completed a BTEC Higher National Diploma in Computing (Software Engineering) with a focus on software development, programming, and database management.