Software Engineer - Full Remote

Job Title: Full-stack Engineer (Full remote work)

Location: Full remote work (Tokyo, Japan)

Employment Type: Full-time (Regular Employment)

Salary: 7,000,000 ~ 9,000,000 JPY

Japanese Level: Beginner

About the Company:

A Tokyo-based technology company specializing in secure computing and AI-driven data security solutions. Founded in 2016, the company aims to enable safe utilization of sensitive data by combining advanced encryption-based secure computing technologies with AI analysis, thus facilitating digital transformation (DX) for businesses while preserving data privacy and compliance

Key Highlights:

• Around 27 to 38 employees, with a notably diverse workforce where approximately 25-40% are international talents, and English is the official company language.
• Estimated revenue around $10 million, categorized as a heavyweight startup valued between $10M and $30M
• Multiple award winner, including ICT Spring Europe 2019 Cybersecurity Award, EY Innovative Startup 2020, and Japan Venture Awards 2020.
• Active partnerships and funding by prominent entities such as Tsubakimoto Chain Co., Mitsui, and integration with advanced technologies like quantum-computing-hardened encryption keys through collaboration with Quantinuum

Key Responsibilities:

The technical stack will vary depending on the project you are involved in, but you will be responsible for the following tasks as full-stack engineer.

• Implementation of the web service infrastructure for the company's own secret computation p
• roducts and contracted projects under development
• Development of React/TypeScript front-end and FastAPI/Python back-end
• Data modeling/search infrastructure development using PostgreSQL, Qdrant, and OpenSearch
• Design and operation of LLM/RAG system using OpenAI and Azure OpenAI ecosystem
• Implementation of privacy-preserving ML inference pipeline using homomorphic cryptography libraries (CKKS/TFHE, etc.)
• Microservice operation with Docker/Kubernetes, CI/CD with GitHub

Requirements:

Must-Have:

• 3+ years of web application development experience (front + back end)
• Working experience with React / TypeScript or similar SPA frameworks
• Experience of developing APIs in Python such as FastAPI
• Experience with RDBMS (PostgreSQL) and Docker container operations
• Team development experience using Git/GitHub
• Experience with AWS development (EKS/ECS, RDS, Lambda, etc.)

Nice-to-Have:

• Microservice design and operation with Kubernetes
• Experience in implementing vector and full-text search engines such as Qdrant / OpenSearch
• Experience in building RAGs for LLM
• Experience with homomorphic cryptography libraries
• Experience in building CI/CD

Perks & Benefits:

• Worker’s Accident Compensation Insurance
• Unemployment Insurance
• Welfare Pension Insurance
• Health Insurance

We have more positions available—if you're open to new opportunities, don’t hesitate to apply!