Full-Stack AI Engineer (C# / Java) & LLM Apps

PT. LOTTE INNOVATE INDONESIA; Cilegon; On-site; IDR 240,000,000 - 420,000,000; Full time

Job summary

PT. Lotte Data Communication Indonesia (LDCI) is seeking a skilled full-stack developer to create and maintain robust applications using C# or Java, with a strong focus on scalable AI/LLM integration across modules and services.

You will work on API-driven AI features, MCP, RAG, and ML workflows, and build prediction and recommendation systems; collaborate with product owners and stakeholders to translate business needs into reliable software, deploy in Indonesia, and continuously improve

Qualifications

• 3+ years in full-stack development using C# or Java.
• Strong API integration and Git experience.
• Hands-on with OpenAI, Anthropic or other LLM APIs.
• Experience with MCP, RAG, ML or AI/LLM development.
• Experience building prediction or recommendation systems is a plus.
• Strong problem-solving and independent work ability.

Responsibilities

• Develop and maintain full-stack apps using C# or Java.
• Design and integrate AI/LLM solutions using APIs.
• Develop AI apps using MCP, RAG, and ML.
• Build prediction and recommendation systems and other AI-driven features.
• Collaborate with stakeholders to deliver scalable and reliable business solutions.

Skills

C# / Java

API integration

Git

OpenAI API

AI/LLM development

Tools

MCP

RAG

ML frameworks

Job description

PT. Lotte Data Communication Indonesia (LDCI) is seeking a skilled full-stack developer to create and maintain robust applications using C# or Java, with a strong focus on scalable AI/LLM integration across modules and services.

You will work on API-driven AI features, MCP, RAG, and ML workflows, and build prediction and recommendation systems; collaborate with product owners and stakeholders to translate business needs into reliable software, deploy in Indonesia, and continuously improve