Senior Java/AI Developer, JR604

ELEKS Software Engineering & Development Office is looking for a Senior Java/AI Developer based in Buenos Aires for a hybrid position: 2–3 days per week onsite at our local office, with the remaining days remote.
Working hours: 10:00 AM – 6:00/7:00 PM ART 
ABOUT PROJECT
The client is among the top-5 health insurance companies in the US. They are dedicated to expanding access to high-quality, cost-effective health care and equipping their members with information and tools so they can make the best health care decisions for themselves and their families.

REQUIREMENTS

• • 5+ years of professional experience in Java and/or Python

    
    

  • Hands-on experience working with LLMs (integration, evaluation, or architecture)

    
    

  • Practical experience with prompt engineering

    
    

  • Understanding of API design and backend service development

    
    

Nice to Have

• Experience with RAG (Retrieval-Augmented Generation) architectures

  
  

• Experience with vector databases and embeddings

  
  

• Cloud AI services experience (Azure OpenAI, AWS Bedrock, etc.)

  
  

• MLOps or LLMOps exposure

  
  
  

RESPONSIBILITIES

• • Design and build AI-powered features and services using LLMs

    
    

  • Develop and maintain backend components in Java and/or Python

    
    

  • Implement prompt engineering strategies and evaluate model outputs

    
    

  • Collaborate with product and engineering teams to integrate AI capabilities into existing applications

    
    

  • Stay current with emerging LLM tooling, frameworks, and best practices

    
    

  • Participate in Agile/Scrum delivery practices