Java
Yeji LEE
Backend Developer
Seoul
Summary
Backend developer with over 2 years of experience in designing and implementing blockchain-based systems using Java and Spring Boot. Skilled in microservice architecture, database optimization (PostgreSQL), and deploying scalable applications with Docker. Proficient in performance optimization, clean code refactoring, and leveraging tools like RabbitMQ and Kafka to build stable, high-performing systems. Experienced in collaborating on blockchain government projects (NFT, STO) and cross-industry partnerships, with strong communication skills in English and French for global teamwork.
Overview
7
7
years of professional experience
8
8
years of post-secondary education
3
3
Certifications
3
3
Languages
Work History
Backend Developer
Finger
09.2022 - Current
- Developed RESTful APIs that facilitated seamless data exchange between clients and servers in a distributed environment.
- Managed efficient SQL queries and data transport.
- Developed smart contracts for various applications, streamlining business processes and reducing costs.
- Provided technical guidance to team members during project development, ensuring adherence to best practices and established standards.
- Developed scalable and maintainable code, ensuring long-term stability of the software.
- Integrated new technologies into existing systems, increasing capabilities and improving overall performance.
- Consistently met project deadlines by effectively managing time and prioritizing tasks according to importance.
Customer Support Specialist
College Canada
Seoul, South Korea
11.2021 - 12.2021
- Provided timely assistance to customers via phone, email, and live chat channels, ensuring a high level of professionalism at all times.
- Developed strong relationships with clients, resulting in repeat business and positive feedback.
- Maintained detailed records of customer interactions, ensuring proper follow-up and resolution of issues.
Pastry Line Cook
Hotel X
07.2021 - 08.2021
- Increased efficiency by streamlining the pastry production process and reducing waste.
- Enhanced customer satisfaction by providing high-quality pastry products on a consistent basis.
- Supported team members during high-volume periods, facilitating smooth operations and timely order fulfillment.
Pastry Line Cook
Constantines Restaurant
07.2019 - 03.2020
- Demonstrated adaptability by stepping in as needed in other areas of the kitchen, contributing to overall team success.
- Developed new recipes for limited-time offerings based on popular flavor trends and customer feedback.
- Assisted in inventory management for the pastry department, ensuring adequate stock levels and minimizing spoilage.
- Contributed to menu development by suggesting innovative dessert ideas that incorporated seasonal ingredients.
- Collaborated with other line cooks to deliver outstanding service and maintain a clean, organized kitchen.
Customer Service Representative
Herbs & Nutrition
11.2017 - 02.2019
- Resolved customer complaints with empathy, resulting in increased loyalty and repeat business.
- Enhanced customer satisfaction by promptly addressing concerns and providing accurate information.
- Developed strong product knowledge to provide informed recommendations based on individual customer needs.
- Labeled, organized and located inventory items in staging areas or on shelves according to quantity, size, or type of material.
- Inventoried warehouse stock on monthly, quarterly and annual basis.
- Welcomed customers and helped determine their needs.
- Counted money in cash drawers at beginning and end of shifts to maintain accuracy.
Education
Bachelor of Science - Computer Science
Korea National Open University
Seoul, South Korea 03.2022 - 02.2025
Diploma - Culinary Management
Niagara College
Niagara-on-the-Lake, Canada 09.2014 - 11.2017
High School Diploma -
MyungDuk Foreign Language High School
Seoul, South Korea 03.2010 - 02.2012
Skills
Strong debugging skills
Certification
Industrial Engineer Information Processing
Training
- 03/2022 - 07/2022: Big Data UI Specialist, Thejoeun Computer Academy - Implemented big data visualization using Python and R
- 01/2014 - 07/2014: ESL, ILSC - English Language Training
- 09/2013 - 12/2014: DUEF C1, IIEF - French Language Training
- 12/2012 - 07/2013: FLE, IFALPES - French Language Training
Accomplishments
- Optimized database tables and performed query tuning to improve storage and retrieval performance for large-scale data (blockchain information)
- Improved TPS (Transactions Per Second) from 170 to 350 by optimizing dApp code and blockchain node configurations
- Reduced blockchain deployment time and enhanced reusability by introducing automation tools (Ansible)
- Enhanced team efficiency by creating and sharing comprehensive guides and training materials
Software
SpringBoot
JPA / QueryDSL
PostgreSQL
Docker
Linux - Ubuntu
AWS - EC2, S3, ECR, HSM
MQ - Kafka, RabbitMQ
Timeline
Industrial Engineer Information Processing
11-2022
Backend Developer
Finger
09.2022 - Current
Bachelor of Science - Computer Science
Korea National Open University
03.2022 - 02.2025
Customer Support Specialist
College Canada
11.2021 - 12.2021
Pastry Line Cook
Hotel X
07.2021 - 08.2021
Pastry Line Cook
Constantines Restaurant
07.2019 - 03.2020
Customer Service Representative
Herbs & Nutrition
11.2017 - 02.2019
Diploma - Culinary Management
Niagara College
09.2014 - 11.2017
Craftsman Bread Making
06-2012
Craftsman Confectionary Making
05-2012
High School Diploma -
MyungDuk Foreign Language High School
03.2010 - 02.2012
Similar Profiles
Ying Hong TanYing Hong Tan
Manager (Full Time) at Finger Waltz MusicManager (Full Time) at Finger Waltz Music
Kira JohnsonKira Johnson
Leasing Manager at The Finger CompaniesLeasing Manager at The Finger Companies
Drew DavenportDrew Davenport
Kitchen Supervisor at Finger Lakes Health SystemsKitchen Supervisor at Finger Lakes Health Systems