Hi,I'mDayeon👋
Business-Minded Data Engineer
Building Scalable Pipelines that Turn Data into Actionable Business Value.
About
I don’t just build data pipelines. I build scalability that drives business value. Leveraging my background in Digital Marketing and Tech Sales to bridge the gap between technical engineering and commercial impact, I have successfully managed data architectures for 1.5M+ users.
From designing 60+ complex xAPI schemas to fine-tuning heavy database queries, I engineer high-performance infrastructures where data integrity meets speed, reducing query latency by 80%.
I specialise in Python, SQL, ETL/ELT, dbt, and Airflow, with deep expertise in AWS, Docker, CI/CD pipelines, and cross-functional backend architectures.
Skills
Python
PostgreSQL
Docker
dbt
Airflow
AWS
BigQuery
Github Actions
Looker
FastAPI
And More...
Projects
From Ideas to Reality
Check out my work
London Restaurant Hygiene Rating Pipeline
2026
HelloMeds - Hackathon Project
2026
Solo Sync - Hackathon Project
2025
Code Your Future
2025
Recipe Project
2024 - Ongoing
K-MOOC
2021 - 2023
Experiences
Connecting The Dots...
CYF Tech Products
2025 Meet-up
Code Your Future - Software Engineer / Programming Teaching Assistant
After moving to London, I joined a larger team where I enjoyed building dashboard website, resolving merge conflicts, and having meaningful discussions about web development.
Certificate of Academic Scholarship
from Korea National Open University
Korea National Open University - Computer Science Student
I established a solid foundation by studying computer science fundamentals.
Modules: Data Structures and Algorithms, Computer Architecture and Operating Systems, Database Systems, Computer Security, Computer Networking
Working hard :)
@ Bubblecon Seoul office
Bubblecon Edtech Co. - Software Engineer
As a self-taught developer, I switched my career from digital marketing to software engineering.
At Bubblecon, I explored web development topics from frontend to backend engineering through the K-MOOC website. This broad exposure was invaluable in shaping my tech expertise.
Brita Korea Annual Conference
Sales Day
Asiance & Brita Group - Digital Marketer
In the world of digital marketing, I discovered the power of Excel functions and pivot tables, which later helped me understand programming functions and databases. I started learning Python to automate repetitive data collection tasks using Beautiful Soup and Selenium.
A surprise visit by Tim Cook
@Apple Store Covent Garden
Apple Store London - Sales Specialist
My journey began at the Apple Store in London, where I explained technology using simple language and analogies. By simplifying complex ideas for customers, I set the stage for my future in tech.
