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Senior Java/AI Developer, JR604

Role overview

Qualifications

  • 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

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

About the company

ELEKS logo

ELEKS

IT Services & IT Consulting

ELEKS, a trusted partner for guaranteed software engineering excellence, quality, and transparency every step of the way. We deliver high tech innovations to Fortune 500 companies, big enterprises and technology challengers, improving the ways they work and boosting the value they create for the modern world. Our 2000+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe, the US and UK, provide our clients with a full range of software services. These include dedicated teams, product development, R&D and technology consulting. For more information, please visit: eleks.com.

Company details

Company typeLarge
IndustryIT Services & IT Consulting
Company size1001 - 5000

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Job description

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

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    MR

    Marcus Rivera

    Chief Revenue Officer

    m.rivera@company.com
    linkedin.com/in/marcusrivera
    Unlocked after you apply
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