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Artificial Intelligence 🏢 Full Time ⭐️ Verified

Senior Prompt Engineer (Direct Hire) - Irvine, CA

Apex AI Innovations
Irvine, CA
Estimated Salary
USD 140.000 – USD 180.000
Live Update
28 September 2026
Deadline
28 Sep 2027

Job Description

Are you ready to shape the future of artificial intelligence? Apex AI Innovations is seeking a visionary Senior Prompt Engineer to join our dynamic team in Irvine, CA. In this Direct Hire role, you will be at the forefront of developing and optimizing Large Language Models (LLMs) to drive our next-generation AI solutions. You will work closely with data scientists and product managers to design sophisticated prompt architectures that maximize model performance and user engagement.

We are looking for a creative problem-solver who is passionate about the intersection of language and code. You will define how users interact with our AI products, ensuring clarity, accuracy, and safety in every output.

Responsibilities

  • Prompt Architecture: Design, develop, and refine complex prompts to guide AI model behavior effectively and achieve specific business outcomes.
  • Model Optimization: Conduct A/B testing and iterative analysis of prompt variations to improve output quality, reduce hallucinations, and enhance relevance.
  • Cross-Functional Collaboration: Work closely with software engineers and product managers to integrate prompt optimization into production pipelines and user interfaces.
  • Research & Development: Stay abreast of the latest advancements in NLP, generative AI technologies, and industry best practices.
  • Documentation: Build and maintain comprehensive libraries of prompts, templates, and style guides for the wider organization.
  • Evaluation: Analyze model outputs to identify edge cases and develop strategies for handling ambiguous inputs.

Qualifications

  • Experience: 3+ years of experience in AI, NLP, or software development with a specific focus on LLMs and generative AI.
  • Tech Stack: Strong proficiency in Python and familiarity with machine learning frameworks (e.g., PyTorch, TensorFlow) and tools like OpenAI API, LangChain, or Hugging Face.
  • Creativity: Exceptional writing and communication skills with a keen eye for detail and a deep understanding of tone, context, and nuance.
  • Problem Solving: Ability to think critically and creatively to solve complex problems and optimize system performance.
  • Education: Bachelor’s degree in Computer Science, Linguistics, English, or a related technical field is required; Master’s degree is a plus.

Required Skills

Python NLP Large Language Models (LLMs) OpenAI API LangChain GPT-4 Claude Data Analysis A/B Testing Machine Learning Creative Writing SQL

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