Principal AI Engineer (Python, Machine Learning, NLP)

Top 3 reasons to join us

• Hybrid working; Flexible time; Macbook Pro
• L&D programs; 17 days off
• 13.7 million B2C users; 140,000+ business customer

Job description

We are looking for a Prompt Engineer with a strong foundation in large language models (LLMs), prompt design, and system integration — someone who can go beyond prompt tuning to design, build, and operate practical AI Agent systems that enhance and automate back-office workflows.

• Design and develop AI Agent platforms or applications from scratch, especially for automating and enhancing back-office operations using LLMs
• Develop and iterate on high-quality prompts, prompt-chaining strategies, and evaluation pipelines
• Monitor agent behavior and system metrics to identify and mitigate hallucinations, performance degradation, or edge cases
• Evangelize and integrate tools, workflows, and development cultures to support rapid and responsible AI feature development
• Collaborate with backend, frontend, and infrastructure teams for seamless integration and delivery
• Mentor team members in best practices for prompt engineering, LLM integration, cloud AI tools, and evaluation methodologies
• Take technical ownership of AI initiatives, leading cross-functional collaboration (BE/FE/AI/SRE), and driving system-level decisions

Just for your reference: Money Forward will become the

Your skills and experience

• Must have
  • 3+ years of experience with Python (or Golang as an alternative)
  • Practical experience designing and optimizing prompts for LLMs in production environments
  • Basic understanding of:
    • Frontend development (e.g., TypeScript/React)
    • Backend development (e.g., web frameworks, databases)
    • Cloud infrastructure (e.g., Azure, AWS, Terraform, serverless architecture)
  • Experience with:
    • Architecture design about multi agent orchestration
    • LLM orchestration frameworks like AutoGen, LangChain and LlamaIndex
    • RAG architecture and vector stores
    • Integrating AI services from platforms like Azure AI Foundry, AWS Bedrock, or GCP Vertex AI
• Nice to Have
  • 5+ years for Web development
  • Familiarity with fine-tuning or instruction-tuning workflows
  • Understanding of AI system deployment from a security/compliance standpoint
  • Exposure to IaC and CI/CD in production systems
  • Experience in B2B application development
  • Experience introducing traditonal machine learning techiniques and related ML pipeline to improve businesses.
• Communication
  • Experience to lead a project as a team leader (required for Leader position)
  • Experience to educate team members
  • Strong sense of ownership

Why you'll love working here

Caring Mental & Physical Recreation: 

• Hybrid working
• Full salary in probation & 13th month salary
• Social insurance on full salary from probation
• Premium Health insurance from probation
• Flexible start 8AM-9AM from Mon-Fri
• 16 days off annually + 1 Birthday Leave 
• Paternity leave extra 5 days 
• Annual company trip; Quarterly team building activities
• Club activities
• Annual health check

Caring Career & Development: 

• Clear Career path
• Foreign language & International technology-related certifications sponsoring
• Well-equipped facility: Macbook pro,  additional monitor,..
• Soft skill workshops
• Tech seminars
• Monthly and biannually Recognition Awards
• Performance review twice/year