Junior AI Engineer

Date PostedMay 26, 2026LocationTokyo, JapanCompanybloomtech.incSalaryJPY 4000K - JPY 6000KTypeit (pc, web, unix) - web application se it (pc, web, unix) - fullstack engineer it (pc, web, unix) - back-end engineer

Job Summary

This role involves AI system design, development, and optimization using generative AI for major client projects. You will support client AI implementation and work on fine-tuning foundational models. The position is open to engineers with backend experience who are looking to transition into AI.

Responsibilities

  • Design and optimize generative AI systems
  • Develop front-end and back-end prototypes
  • Support clients with AI implementation and requirements
  • Fine-tune LLMs and perform data cleansing

Required Skills

  • 2+ years backend engineering experience
  • Proficiency in Python, Ruby, Java, or similar
  • Relational database and SQL expertise
  • Self-study/usage of Generative AI tools
  • Business-level Japanese fluency

Job Details

Job Description: ★Attractive Points ・No experience necessary as an AI engineer ・Basic training provided ・Work on major client projects ★About the Job ◎System design, development, and optimization using generative AI ◎Front-end and back-end prototype development ◎Supporting client companies in implementing AI (requirements definition, PM assistance, etc.) ◎Fine-tuning and research/development using existing foundational models (LLM) ◎Data cleansing ◎Exploring ways to utilize generative AI for integration into services [We have many AI-focused projects] (Specific Project Details) ・Generative AI infrastructure development support ・Conversational AI research/development/implementation ・Sales management system API server construction ・Cloud and sales management system integration development ・App development for communication in the metaverse Working Hours: 9:00 AM - 6:00 PM (May vary by project) *Depending on the project, you may be required to work in the office, partially remotely, or remotely. Job Requirements: [Required Qualifications] ◆ Experience using generative AI (ChatGPT, Claude, Gemini, etc.) and self-study. ◆ 2+ years of backend engineering (Python, Ruby on Rails, Java, C#, PHP, etc.) knowledge and experience in server-side program development. ◆ Knowledge and experience in data model design using relational databases (MySQL, PostgreSQL, Oracle, etc.) and efficient SQL. ◆ Ability to understand customer requirements and speed and quickly incorporate them into development. ◆ Ability to solve complex business challenges in collaboration with stakeholders. ◆ Ability to take ownership of schedule coordination and design, and bring a product to release. [Preferred Qualifications] ◆ Knowledge and experience with generative AI. ◆ Knowledge of machine learning, deep learning, classification, regression, and anomaly detection. ◆ Knowledge and experience as an infrastructure engineer (AWS, GCP, Azure). ◆ Experience in quantitative and qualitative analysis of user behavior. ◆ Knowledge and experience in web front-end technologies (HTML, JavaScript). ◆ Experience in waterfall or agile development methods. ◆ Knowledge and experience in web application operation/tuning and secure programming. Language Requirements: English Level: None Japanese Level: Business Level (JLPT N2 or higher)