Senior Java/AI Developer, JR604

About the Position

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

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.

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

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

About the Company

ELEKS Software Engineering & Development Office is a leading software development company that provides innovative solutions to clients worldwide. We are committed to delivering high-quality software products and services, and we are always looking for talented individuals to join our team.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.