Backend Engineer (AI-driven SaaS)
Full-time
Snaphunt
About the Role
- Develop backend systems for an AI-powered SaaS product
- Work with large-scale enterprise data and implement LLM-based features
- Work on a proven product with real users and real impact
Responsibilities
- Backend development using Python (FastAPI) and TypeScript
- Design and implement LLM-based features
- Improve APIs, data models, and overall system performance
Tech Stack
Languages
- Python (FastAPI), TypeScript (Next.js), SQL
Databases / Search
- PostgreSQL
- Elasticsearch / OpenSearch
Infrastructure
- AWS, GCP, Fastly
Internal Tools
- GitHub, Slack, Notion, Asana, Google Workspace
- Cursor / Claude Code (AI-assisted coding, refactoring)
- CodeRabbit (AI-based PR review)
- n8n (AI workflow orchestration)
Requirements
- Experience in backend development
- Experience designing APIs and databases
- Experience working in an agile development environment
- Currently residing in Japan, or willing and able to relocate to Japan
- Business-level Japanese communication skills (equivalent to JLPT N1)
Nice to Have
- Experience with AI / LLM-related development
- Experience in architecture or system design
- Experience working at a startup
Employment & Benefits
- Employment type : Full-time
- Salary : JPY 4,000,000 – 9,000,000 (depending on experience and skills)
- Fully remote work within Japan
- Full flex-time system (no core hours)
- Stock options available
Why Join Us?
- Work on real-world AI products used by real businesses
- Build systems handling large-scale data and LLM-based intelligence
- Join a startup that already has PMF and is entering a major growth phase
- Shape both the product and engineering culture from an early stage
To apply for this position, please visit our official careers page and submit your application via the link below:
Vacancy posted more than 2 months ago
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