Project Lion - Senior Prompt Engineer - Japan (Remote, Part-Time)

Welo Global is hiring a Project Lion - Senior Prompt Engineer - Japan (Remote, Part-Time). This is a remote job – you can work from home in Sri Lanka for a company abroad.

Job summary

• Post: Project Lion - Senior Prompt Engineer - Japan (Remote, Part-Time)
• Employer: Welo Global
• Where: Remote – open to Japan (includes Sri Lanka)
• Job type: Contract
• Level: Senior
• Apply by: 8 December 2026 (or until the post is filled)

About this kind of job

Technical posts are about installing, checking and repairing equipment or supervising work on site. Safety, practical skill and the ability to solve problems quickly matter most.

What the job involves

• Utilize Automatic Prompt Generation (APG) tools to create baseline prompts for complex parent-child template clusters
• Run and supervise Automated Prompt Optimization (APO) tool, review the outputs, and flag when the APO reaches deadlocks or plateaus.  
• Monitor shadowbot runs to ensure sufficient disagreements (between human and LLM ratings) are registered, generated, and tracked.  
• Draft technical launch readiness justifications (Launch Certification Documentation) for final

Working remotely from Sri Lanka

• You need a laptop, a stable internet connection and good written English.
• Check the working hours (time zone) and how you will be paid (for example bank transfer, Payoneer or Wise) before you accept an offer.
• Foreign income received through banks in Sri Lanka may have tax rules – keep your payment records.

Tip from JobPortal

Mention your NVQ, diploma or degree and the machines, tools or projects you have worked with. Apply only through the official link and never pay money to get a job.

Source

This listing comes from Jobicy. Read the full original advert and apply there.

• Language Skills: Native fluency in Japanese and fluent in English
• Data Analysis: Strong proficiency in identifying error patterns, analyzing model performance, and using SQL or other data analytics tools. 
• Technical Agility: Ability to quickly learn and master proprietary tools with minimal supervision. 
• Communication: Excellent verbal and written communication skills. 
• Optional / Preferred Skills: 
• Familiarity with enterprise-grade LLM interfaces like the Goose API. 
• Experience in AI model evaluation, data science, computational linguistics, or software engineering. 
• Hands-on experience with Automated Prompt Optimization (APO) systems or tuning workflows.