HSU YUAN CHIU
Backend Engineer
Taipei City
Summary
Experienced backend engineer with strong track record in developing and optimizing server-side applications. Skilled in various programming languages, database management, and API integration. Focused on team collaboration to deliver high-quality results and adapt to evolving project requirements. Known for reliability and problem-solving abilities in fast-paced environments.
Overview
6
6
years of professional experience
2
2
Certifications
2
2
Languages
Work History
Backend Engineer
Lctech
04.2024 - 08.2025
- Designing and maintaining shared backend systems including real-time messaging, user account, payment, RBAC, and ID verification consumed across platforms within JKF ecosystem.
- Designed and re-architected real-time messaging system from scratch (500+ steady RPS, peak 3K+ RPS, p99 < 200ms)
- Designed and executed large-scale data migration (10M–70M+ records) across Firestore, Neo4j, PostgreSQL and Elasticsearch
- Optimized slow queries, reducing latency from ~7s to
- Resolved legacy issues of memory leak and race condition
- Designed high-concurrency counter system using redis, distributed locking and Lua script
- Implemented media processing pipeline with imagemagick, FFmpeg and GCP Transcoder API using asynchronous job workflow and status callbacks
- Designed full-text search system using Elasticsearch, including index mapping, analyzers, and cross-chatroom search
- Provisioned and managed database and middleware infrastructure and production monitoring
- Designed failure handling mechanisms with Saga, retry policy and DLQ
- Integrated distributed tracing and structured log for observability
- Led system design and implementation of RBAC system with role-policy-permission hierarchy using Neo4j
- Designed internal dependency injection framework used across services
- Implemented unit, integration, load tests to ensure system correctness
- Utilized AI Tools to assist refactoring, test generation and code review
Full Stack Engineer
WPG Holdings
03.2022 - 12.2023
- Developed backend systems using Java (Spring Boot), MSSQL, and ActiveMQ for internal business workflows
- Built forum features and admin systems, supporting content management and user interaction
- Maintained core services and improved system stability
Advertising Account Executive
Hakuhodo Integrated Marketing
03.2019 - 05.2021
- Managed advertising campaigns for Suntory Health Products
- Proposed campaign strategies and creatives across web, TV commercials, and print media
- Planned and executed marketing initiatives including performance marketing and PR campaigns
- Conducted campaign analysis using data visualization and pivot-based reporting, providing optimization insights
Education
Japanese Language and Literature
01-2016
Skills
Languages: Golang, Java
Backend: gRPC, Spring Boot
Database: PostgreSQL, Redis, Elasticsearch, Neo4jMSSQL
Certification
GCP Professional Cloud Architect
Timeline
Backend Engineer - Lctech
04.2024 - 08.2025
Full Stack Engineer - WPG Holdings
03.2022 - 12.2023
Advertising Account Executive - Hakuhodo Integrated Marketing
03.2019 - 05.2021
Fu Jen Catholic University - , Japanese Language and Literature