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Information Technology 🏢 Full Time ⭐️ Verified

Senior Prompt Engineer | AI/LLM Specialist

Apex Intelligence Labs
Boston
Estimated Salary
USD 150.000 – USD 200.000
Live Update
21 September 2026
Deadline
21 Sep 2027

Job Description

Are you ready to architect the future of artificial intelligence? Apex Intelligence Labs is seeking a world-class Prompt Engineer to join our elite team in Boston, MA. We are revolutionizing how humans interact with Large Language Models (LLMs), and we need your expertise to refine our proprietary AI systems.

In this high-impact role, you will be at the forefront of Generative AI, crafting complex instruction sets that maximize model accuracy, creativity, and safety. If you are passionate about the intersection of linguistics and technology, we want to hear from you.

Responsibilities

  • Design and refine complex prompt architectures for Large Language Models (LLMs) including GPT-4, Claude, and Llama 2.
  • Conduct rigorous A/B testing to optimize prompt performance and output quality.
  • Develop prompt libraries and standard operating procedures to scale AI capabilities across the organization.
  • Collaborate closely with Data Scientists and ML Engineers to fine-tune models based on user feedback.
  • Evaluate and mitigate biases in AI-generated content to ensure ethical standards.
  • Stay ahead of industry trends in NLP and apply emerging techniques to improve system performance.

Qualifications

  • 3+ years of professional experience in Prompt Engineering, NLP, or a related AI field.
  • Deep understanding of LLM architectures, tokenization, and model limitations.
  • Proficiency in Python scripting and familiarity with APIs (OpenAI, Anthropic, Hugging Face).
  • Exceptional writing skills with a keen eye for detail, nuance, and tone.
  • Experience in A/B testing methodologies and data-driven decision making.
  • Bachelor’s degree in Computer Science, Linguistics, or a related technical field (Master’s preferred).

Required Skills

Prompt Engineering LLM NLP GPT-4 Claude Python AI Machine Learning Data Analysis A/B Testing

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