YangHyojeong

Summary

Engineer experienced in data pipelines, batch processing, and cloud infrastructure operations. Led full development lifecycles from concept to production as a sole developer managing backend, data pipelines, and infrastructure.

Technical Expertise

• Languages: Python, TypeScript, Bash, Ruby
• Data / Pipeline: Airflow (MWAA), Batch Processing, ETL
• Cloud: AWS (S3, ECS, Lambda, MWAA, Athena, CloudWatch)
• DB: PostgreSQL, MySQL, MongoDB, Redis
• Backend: NestJS, Django, DRF, Ruby on Rails
• Frontend: Next.js, SvelteKit, React
• AI Tools: Claude Code, GitHub Copilot, ChatGPT

Careers

DeSpread

Software Engineer | 2025.09 - Present

• Operated Airflow-based batch pipelines for data collection and processing
• Designed Full Text Search API with Kiwi tokenizer
• Deployed services on AWS ECS with ArgoCD

Mediquitous

Full Stack Software Engineer | 2022.10 - 2025.05

• Optimized query performance by 75% (12s → 3s) through SQL profiling
• Built AWS infrastructure monitoring dashboard
• Engineered data migration with consistency verification

SellerNote

Back-End Developer | 2021.10 - 2022.09

• Built Order Management System integrating Coupang, Cafe24 APIs
• Implemented bulk Excel upload system (50MB+)
• Refactored OMS into standalone MSA service

Petner

Back-End Developer | 2020.09 - 2021.10

• Redesigned settlement batch system for accurate tax computation
• Built async processing pipelines using Sidekiq
• Introduced TDD methodology reducing bug occurrence by 40%

Education

Korea National Open University - B.S. Computer Science (2022 - Present)

Chikushi Jogakuen University - Language Exchange, Japan (2018 - 2019)

Dong-A University - B.S. Management Information Systems (2015 - 2020)

Languages

• Korean - Native
• English - Intermediate
• Japanese - Fluent