We are seeking a highly skilled and versatile Full-Stack Developer with strong experience in cloud infrastructure, AI integration, Python-based data processing, and investment data analysis. This role will involve building robust systems from the ground up, optimizing infrastructure, and implementing advanced AI-driven features for financial applications.

Key Responsibilities

Server Construction

• Build and configure servers in cloud environments such as AWS or Azure
• Select optimal server plans based on requirements and cost efficiency
• Design and implement databases (SQL / NoSQL)
• Design and configure load balancing for high availability and scalability

Frontend Development

• Create responsive and user-friendly web designs based on project requirements
• Work with any frontend stack (HTML / CSS / JavaScript / React / Vue welcomed)

Backend Development

• Integrate and utilize various APIs and perform web scraping
• Implement backend load balancing solutions
• Develop secure user management and authentication systems
• Build backend services with Python

Python / Data Processing

• Effectively use Python libraries for data processing and automation (Pandas, NumPy, etc.)
• Perform technical indicator calculations using TA-Lib
• Analyze large datasets from APIs and web scraping sources

AI / RAG / LLM Integration

• Integrate ChatGPT or other LLM APIs into systems
• Manage LLM usage costs via RAG or similar optimization methods
• Select LLMs that meet project requirements and budget constraints
• Implement chatbot functionalities for end users

AI Coding Tools

• Utilize AI-powered development tools such as Cursor or Claude Code
• Actively propose and implement AI-based workflow optimizations

Japanese Language Skills

• Read and understand Japanese-language documents such as stock market reports

Investment Experience

• Experience analyzing or trading Forex (FX) and cryptocurrencies
• Experience analyzing the Japanese stock market

Required Qualifications

• Cloud Infrastructure: AWS and/or Azure server setup, scaling, and cost optimization
• Database Management: MySQL, PostgreSQL, MongoDB, or equivalent
• Backend Development: Strong Python skills; knowledge of Flask, Django, or FastAPI
• Frontend Development: Proficiency in HTML5, CSS3, JavaScript; familiarity with React or Vue
• API Integration: REST and WebSocket APIs, data ingestion from financial data providers
• Web Scraping: BeautifulSoup, Scrapy, or Selenium
• Data Processing: Pandas, NumPy, TA-Lib for technical indicators
• Security: Authentication/authorization, OWASP best practices, secure API design
• Load Balancing: Nginx, HAProxy, or cloud-native load balancing tools
• AI/LLM Integration: Experience with OpenAI API, LangChain, or similar
• Version Control: Git and GitHub/GitLab workflows
• Testing: Unit testing, integration testing, pytest or unittest frameworks
• Problem Solving: Ability to design efficient, scalable solutions for high-load systems
• Japanese Comprehension: Ability to read and interpret technical or financial documents in Japanese

Preferred / Nice-to-Have Skills

• DevOps: CI/CD pipelines, GitHub Actions, or Jenkins
• Containerization: Docker, Kubernetes
• RAG Development: Vector databases (Pinecone, Weaviate, FAISS)
• Financial APIs: Alpha Vantage, Binance API, Yahoo Finance Japan
• Trading Systems: Understanding of order execution, latency optimization, and market data streaming
• UX/UI Skills: Figma or Adobe XD for rapid prototyping
• Machine Learning: Scikit-learn, PyTorch, TensorFlow basics
• Japanese Language Proficiency Test (JLPT): N3 level or higher

If you are passionate about technology, AI, and financial markets, and can deliver end-to-end solutions in a fast-paced environment, we’d love to hear from you.