Tyler
Open to proposals and new opportunities — email is the best way to reach me, and my CV is downloadable as a PDF.
Backend engineer in Taipei, leading a team of five. Former observational astronomer — my master's thesis was on the stellar flares of Wolf 359, and it became a first-author paper in AJ (2022).
I'm drawn to systems that misbehave at the edge — telescopes, data pipelines, production traffic. Same patience, different stack. This blog collects technical notes, oshi diaries, and whatever else is worth writing down, in three languages.
Experience
2025.06 – present
Backend Supervisor
Pacston, Taipei
- Architected a greenfield document-automation platform end to end in FastAPI and PostgreSQL: 195 REST endpoints over 44 tables, 1M+ requests a month at a 0.005% error rate and a 39 ms median.
- Moved a 37 s synchronous reconciliation off the request path behind a Postgres advisory lock, cutting platform p99 latency from 39.2 s to 1.0 s.
- On the legacy serverless platform (3.9M API requests and 34.9M Lambda invocations a month): cut the primary API's mean duration 48%, and a core endpoint from 244 queries / 2.6 s to 3 queries / 210 ms.
- Merged 100 pull requests; introduced the team's first CI quality gate and its uv + ruff toolchain.
2023.08 – 2025.05
Backend Engineer
Pacston, Taipei
- Top contributor on a 207K-line AWS Chalice serverless platform automating U.S. employment-based immigration petitions, including its data-model layer over 125 relational tables.
- Designed a real-time messaging backend on API Gateway WebSockets and DynamoDB with Cognito-authenticated handshakes — now carrying 1.8M message invocations a week.
- Architected a bibliometric ETL over the public OpenAlex dataset, sharding citation records across 100 partitioned MySQL tables with incremental syncs.
2021.09 – 2023.06
Research Assistant
National Central University, Taoyuan
- Built ETL pipelines in Django to reduce astrophysical time-series data, and a Target and Observation Management platform still in use at Lulin Observatory.
- Researched Type Ia supernova host environments; first author in MNRAS.
Education
2019.09 – 2021.06
MSc, Astronomy
National Central University
2015.09 – 2019.06
BSc, Physics
National Sun Yat-sen University
First-author publications
- Simultaneous Detection of Optical Flares of the Magnetically Active M-dwarf Wolf359
- A closer look at the host-galaxy environment of high-velocity Type Ia supernovae