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

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• 5+ years of professional experience in Java and/or Python
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• Hands-on experience working with LLMs (integration, evaluation, or architecture)
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• Practical experience with prompt engineering
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• Understanding of API design and backend service development

Nice to Have

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• Experience with RAG (Retrieval-Augmented Generation) architectures
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• Experience with vector databases and embeddings
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• Cloud AI services experience (Azure OpenAI, AWS Bedrock, etc.)
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• MLOps or LLMOps exposure

RESPONSIBILITIES

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• Design and build AI-powered features and services using LLMs
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• Develop and maintain backend components in Java and/or Python
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• Implement prompt engineering strategies and evaluate model outputs
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• Collaborate with product and engineering teams to integrate AI capabilities into existing applications
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• Stay current with emerging LLM tooling, frameworks, and best practices
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• Participate in Agile/Scrum delivery practices