Backend Engineer/No Japanese required/AI technology company

Responsibilities

• AI Product Development
  • Design, develop, and operate backend systems for AI products
  • Implement AI agent systems utilizing large language models (LLMs)
  • Develop APIs for real-time speech processing and speech synthesis systems
  • Build and optimize natural language processing pipelines
• System Architecture & Infrastructure
  • Design distributed systems using microservices architecture
  • Design and implement scalable APIs for high-traffic scenarios
  • Containerization and Kubernetes operations on GCP
  • Database design and query optimization for large-scale data processing
• Development Process & Quality Improvement
  • Build and improve CI/CD pipelines
  • Promote code reviews and test automation
  • Build monitoring and log analysis systems
  • Implement and operate based on security requirements
• Machine Learning & AI Integration
  • Integrate and deploy machine learning models to production environments
  • Build and operate MLOps pipelines
  • Optimize inference API performance and reduce latency
  • Develop A/B testing infrastructure and support data analysis
• Team Collaboration & Technical Leadership
  • Collaborate with cross-functional teams (designers, product managers, project managers)
  • Participate in technical selection and architecture decisions
  • Research new technologies, build prototypes, and conduct technical validation
  • Improve and automate development processes

Required Qualifications

We are looking for candidates with:

• Bachelor's degree in Computer Science, Software Engineering, Artificial Intelligence, Machine Learning, Mathematics, Physics, or related fields, or equivalent practical experience
• 5+ years of application development experience using Python
• 3+ years of experience developing complex SaaS products or high-traffic B2B products
• 3+ years of experience with cloud services (AWS, GCP, Azure) and container technologies (Docker, Kubernetes)
• Experience working at startups or growth-stage companies, or equivalent environments
• Knowledge of and passion for AI-related technologies
• Language requirements (either):
  • Japanese: Fluent (able to discuss product development without misunderstandings)
  • English: Business level

Preferred Qualifications

Candidates with the following experience or skills will be highly regarded:

• Experience building systems utilizing natural language processing or machine learning
• Experience developing machine learning models with Python, TensorFlow, or PyTorch
• Experience with chatbot, speech recognition systems, or AI agent development
• Experience launching new businesses/products from the 0→1 phase
• Full-stack application development experience
• Bilingual (Japanese/English)

Tech Stack

Languages: Python (for framework development), TypeScript / React / Next.js (frontend) / NX
Infrastructure: GCP (containers / Kubernetes), Docker
Tools: Slack, Confluence, Linear, Google Workspace, GitHub, Notion, etc.
Work Environment: Mac (Apple Silicon), dual monitors available