Senior Backend Engineer (Python / FastAPI)
Taipei City, Taiwan · 5+ years experience · Full-time · Onsite · Posted Oct 7, 2026
At a glance
- Experience
- 5+ years experience
- Employment
- Full-time
- Workplace
- Onsite
- Location
- Taipei City, Taiwan
About the role
- Nahc.io is seeking a Senior Backend Engineer to own the Python/FastAPI backend end to end, including HTTP APIs, background workers, and production behaviour.
Responsibilities
- Own the Python/FastAPI backend end to end, including HTTP APIs, background workers, and production behaviour.
- Own the PostgreSQL data model and its evolution, covering schema design, migrations, concurrency control, and query performance.
- Build asynchronous, event-driven pipelines for medical image processing, from ingestion and de-identification to inference submission and result handling, with reliable retry and timeout behaviour.
- Integrate with an internal platform for authentication, GPU inference, and usage metering, keep the product resilient when it is unavailable, and enforce multi-tenant data isolation and patient data privacy.
- Agree the product-to-model contract with the data science team and define API contracts with the frontend engineers who consume them.
- Maintain the architecture decision record, lead design reviews, and support the legacy TypeScript service until it is retired.
Requirements
- 5+ years of professional backend engineering, including production ownership of a system you designed.
- Deep backend fundamentals in any language (Python, Go, Java, Kotlin, C#, TypeScript or Rust), and willingness to become effective in Python, FastAPI, and an asynchronous codebase.
- A strong instinct for concurrency hazards such as race conditions, lost updates, and messages processed twice.
- Strong PostgreSQL and SQL: data modelling, transactions and concurrency control, indexing, and migration practice.
- Experience with message queues and event-driven architecture, including idempotent retries, dead-lettering, and timeout handling, and with integrating external services designed for failure.
- Disciplined engineering practice (static typing, automated testing, code review, CI/CD, Docker) and productive use of AI coding assistants.
- Ability to work independently, set technical direction, and raise concerns about a requirement before implementing it; comfortable working in both Chinese and English.
Skills
- Python
- FastAPI
- PostgreSQL
- SQL
- Go
- Java
- Kotlin
- C#
- TypeScript
- Rust
- Docker
- Google Cloud Platform
Show all 15 skills
- Pydicom
- NumPy
- React
