About
A concise overview of my experience, working principles, and strengths.
My core strengths include website performance optimization, RESTful API design, and seamless system integration. I'm passionate about improving development workflows and staying current with modern web technologies.
Although I graduated in Thermal Engineering, that background built a strong foundation in logical reasoning and problem-solving—skills that have been crucial to my success as a software developer.
Key highlights:
• 5+ years of experience, 10+ production projects (small to large scale)
• Performance: improved TTFB and response time by 30–50% across multiple projects
• CI/CD: reduced release time by ~60%, increased deployment stability
• Reliability: maintained service uptime up to 99.9% depending on project
Skills
Technologies I master to build reliable, performant, and scalable systems.
Backend
Django, FastAPI, Laravel
Frontend
Next.js, ReactJS
Database
PostgreSQL, MySQL
DevOps
AWS, Jenkins, Docker
Featured Projects
Selected products where I played a key role.
Yadoriki Change
Technical Approach:
• Built a modular automation system leveraging Playwright to simulate native user interactions on each platform, ensuring compatibility with frequently changing UI structures.
• Integrated API-based data processing and Celery task queues to handle high-volume synchronization jobs asynchronously, enabling scalability and fault tolerance.
• Designed a reusable synchronization framework allowing flexible configuration for multiple clients and hotel systems — rather than isolated one-off bots.
Key achievements:
• Intelligent retry and error-handling pipeline with centralized logging and monitoring.
• Optimized queue scheduling to minimize synchronization latency and balance workload dynamically.
Role: Lead Backend — System Architecture, Code Review, and Deployment Automation.
Outcome:
• Achieved ~99% synchronization accuracy, reducing manual input errors by 80%.
• Increased throughput and stability of data updates across multiple platforms.
• The developed framework shortened development time for new hotel connectors by over 50%.
Resunasu
Technical Approach:
• Designed a secure and scalable backend architecture, ensuring compliance with data protection standards for sensitive medical information.
• Integrated LINE Messaging API for automated survey delivery and response tracking.
• Implemented Google Place API for clinic data validation and Stripe for seamless online payments.
• Focused on performance, reliability, and maintainability through modular design and comprehensive unit testing.
Key achievements:
• Optimized performance and reliability through unit tests
• Successfully integrated with LINE API, Google Place API, and Stripe
Role: Backend Developer, API Architecture, Payment Integrations
Outcome:
• Reduced average survey sending time by 40%, improving operational efficiency.
• Increased user response and completion rates by 25% thanks to smoother delivery and UX.
• Built a solid foundation for future multi-channel survey distribution.
Yadoriki Crawl
Technical Approach:
• Designed and implemented a modular crawling and ETL pipeline capable of handling millions of records monthly.
• Built data normalization workflows to unify structures from diverse sources, ensuring clean and analyzable datasets.
• Deployed and maintained AWS-based infrastructure, optimizing compute and storage utilization for scalability and cost efficiency.
• Implemented monitoring, retry, and scheduling mechanisms for reliable, fault-tolerant operation.
Key achievements:
• Demonstrated strong skills in processing and structuring large datasets
• Designed and deployed infrastructure on AWS
Role: Data Engineer — Crawler Architecture, ETL Pipeline Design, AWS Infrastructure.
Outcome:
• Collected and processed 1M+ hotel records per month.
• Reduced infrastructure costs by approximately 35% through optimized resource usage.
• Improved data accuracy and availability for downstream analytics systems.
Mental Health EHR System
Technical Approach:
• Designed and implemented a secure, role-based access control system with detailed audit trails to ensure compliance with medical data privacy and healthcare regulations.
• Built comprehensive modules for clinical documentation, appointment management, therapy tracking, and real-time patient monitoring with intelligent alerting.
• Applied the Bmad Method for full lifecycle delivery — from requirement analysis and UI/UX design to backend development, deployment, and maintenance.
• Automated infrastructure and CI/CD pipelines to ensure reliable updates and system scalability.
Key achievements:
• Designed secure EHR system with role-based access control and audit trails
• Implemented real-time patient monitoring and alert system
Role: Solo Full-Stack Developer — Product Owner, UX/UI Designer, DevOps Engineer.
Outcome:
• Reduced patient data processing time by 70%, significantly improving operational efficiency.
• Increased treatment accuracy and consistency by 40% through structured, accessible patient data and clinical insights.
• Provided a foundation for digital transformation in small-to-medium mental health facilities.
Photo/Video Editing Service Platform
• Multi-role CMS system: customer registration/ordering, admin management, staff task assignment.
• Integrated PayPal payment gateway with complete workflow management from order to delivery.
Key achievements:
• Integrated PayPal payment gateway with a fully automated workflow covering order confirmation, payment tracking, and delivery notifications.
• Designed intuitive UI/UX flows to simplify service selection, pricing, and communication between customers and editors.
• Deployed a scalable full-stack architecture with monitoring, CI/CD, and security best practices for reliability and maintainability.
Role: Solo Full-Stack Developer, Product Owner, UX/UI Designer, DevOps Engineer
Outcome:
• Streamlined order processing by 80%, reducing manual coordination and turnaround time.
• Increased customer satisfaction by 60% through smoother interactions and transparent progress tracking.
• Established a solid foundation for scaling the business into multi-service digital production.
Korean Community E-commerce Platform
Technical Approach:
• Implemented a robust backend architecture with modular APIs for product listings, transactions, messaging, and user management.
• Integrated a secure payment system, comprehensive order management, and social interaction features such as user reviews and community discussions.
Designed and optimized database schemas for scalability and fast query performance under growing user activity.
Key achievements:
• Implemented advanced caching and indexing strategies to boost data access speed.
• Established CI/CD pipelines and monitoring tools to improve deployment stability.
Role: Backend Developer, API Architecture, Database Design
Outcome:
• Improved overall platform performance by 65%, significantly enhancing user experience and engagement.
• Reduced API response time by 50%, significantly enhancing user experience and engagement.
Work Experience
My career journey, responsibilities, and impact created.
Software Engineer
Inisoft JSC | 08/2024 - Present
Serving as PM and Team Leader, managing projects and leading development teams. Planning, task assignment, and ensuring product quality.
Software Engineer
Landbridge JSC | 08/2023 - 08/2024
Led core web app development, collaborated cross-functionally, and mentored junior engineers.
Software Engineer
AMELA Technology JSC | 04/2021 - 08/2023
Designed backend architecture, implemented CI/CD and automated testing to improve code quality and development velocity.
Frontend Developer
Hung Ha Payment JSC | 03/2020 - 04/2021
Built responsive, high-performance UIs with a strong focus on UX.
Software Engineer
Inisoft JSC | 08/2024 - Present
Serving as PM and Team Leader, managing projects and leading development teams. Planning, task assignment, and ensuring product quality.
Software Engineer
Landbridge JSC | 08/2023 - 08/2024
Led core web app development, collaborated cross-functionally, and mentored junior engineers.
Software Engineer
AMELA Technology JSC | 04/2021 - 08/2023
Designed backend architecture, implemented CI/CD and automated testing to improve code quality and development velocity.
Frontend Developer
Hung Ha Payment JSC | 03/2020 - 04/2021
Built responsive, high-performance UIs with a strong focus on UX.
Contact
If you have a project or need an expert, feel free to reach out.
I typically respond within 24 business hours.