Justin Lin
Taiwan, Taipei · [email protected] · 0981392891 · github.com/jubeatwww
Experience
Lead Software Engineer • Digit Spark
Jan 2023 - Present | Taipei, Taiwan
- Manage and execute strategic refactoring projects for cost-efficient services, achieving a 35% reduction in database expenses.
- Guide my team through comprehensive refactoring of a 3TB database (2 billion records) and oversee architectural enhancements, achieving a drastic reduction in feature response times from over 10 minutes to under 5 seconds.
- Lead the infrastructure design and collaborate with the execution team to develop an advertising delivery system from scratch, achieving 100K daily ad views and accommodating up to 10K requests at peak times, all while optimizing cloud expenses to maintain a modest budget of approximately 500 USD per month.
- Lead the design and development of an SEO audit system, facilitating collaboration between stakeholders and engineering teams to tailor features to market needs, thereby reducing manual workload and boosting client efficiency by 15%.
- Deploy a message broker to handle sudden traffic surges, cutting the request fail rate by 90%, and solving 30% of customer complaints.
- Fix cross-cloud database issues, enabling the consolidation of two API servers and one load balancer into Kubernetes, which optimizes idle resource usage.
Software Engineer • Daione
Dec 2019 - Dec 2022 | Taipei, Taiwan
- Led the development of a business marketing matchmaking system from inception to launch, overseeing the architecture and execution of the enterprise side within a year. Collaborated closely with outsourced teams on the KOL side, integrating features such as contract signing, subscriptions, and a points system, ultimately attracting 500 enterprises and over 5,000 KOLs.
- Directed a team of three in developing an i18n collaborative editing mechanism that enabled direct website text updates without engineering intervention, saving over four hours per week on text revisions.
- Engineered and executed a redesign of the email delivery infrastructure, achieving a 30% reduction in notification email drop rates and completely eradicating server downtime.
Software engineer (Part Time) • Junyi Academy
Sep 2017 - Present | Taipei, Taiwan
- Redesigned server architecture, achieving a 72% reduction in cloud expenses by optimizing resource utilization and implementing cost-effective solutions.
- Led the successful migration of the entire project from Python 2 to Python 3.9, ensuring compatibility and leveraging new language features to enhance performance.
- Spearheaded the upgrade of the main application to React 16.4, introducing React Hooks and modernizing the use of third-party libraries, resulting in improved development efficiency and application stability.
Education
National Chiao Tung University
Computer Science • 2013 - 2017
Skills
- Programming Languages: Typescript, Golang, PHP, Python, Java/Kotlin
- Frontend: Vue, React, Angular
- Databases: Mysql, Postgresql
- Miscellaneous: Linux, k8s, CI/CD, Refactoring Code, Clean Architecture
