Full Stack AI Engineer (C#/Java)

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

Develop and maintain full-stack applications using C# or Java.

Design and integrate AI/LLM solutions using APIs such as OpenAI and Anthropic.

Develop AI applications using MCP, RAG, and Machine Learning.

Build prediction and recommendation systems and other AI-driven features.

Collaborate with stakeholders to deliver scalable and reliable business solutions.

Requirements

• 3+ years of experience in full-stack application development using C# or Java.
• Strong experience with API integration and Git.
• Hands-on experience with OpenAI, Anthropic, or other LLM APIs.
• Experience with MCP, RAG, Machine Learning, or AI/LLM application development.
• Experience developing prediction or recommendation systems is a strong plus.
• Strong problem-solving skills and ability to work independently.

PT. Lotte Data Communication Indonesia (LDCI) are subsidiary companies of Lotte Data Communication Company (LDCC), which is also a part of Lotte Group the multinational conglomerate corporation, and one of the Top Five biggest groups with diverse businesses in South Korea.

Specialized in handling IT Service Provider, We lead business innovation for our customers by providing differentiated IT platforms and services for all industries, including Food, Retail, Hospitality, Manufacturing, Logistic, Financial Service, and Chemicals. We are actively engaged in business such as Solutions, IT Outsourcing, and Data Center Business.

PT. Lotte Data Communication Indonesia (LDCI) are subsidiary companies of Lotte Data Communication Company (LDCC), which is also a part of Lotte Group the multinational conglomerate corporation, and one of the Top Five biggest groups with diverse businesses in South Korea.

Specialized in handling IT Service Provider, We lead business innovation for our customers by providing differentiated IT platforms and services for all industries, including Food, Retail, Hospitality, Manufacturing, Logistic, Financial Service, and Chemicals. We are actively engaged in business such as Solutions, IT Outsourcing, and Data Center Business.