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Junior Prompt Engineer

Job in Reading, Berkshire, RG1, England, UK
Listing for: Moonfire
Full Time position
Listed on 2026-07-20
Job specializations:
  • Software Development
    AI Engineer (Applied/Software), Machine Learning/ ML Engineer
Salary/Wage Range or Industry Benchmark: 45000 - 60000 GBP Yearly GBP 45000.00 60000.00 YEAR
Job Description & How to Apply Below

JOB
- Junior Prompt Engineer

LOCATION
- Reading (Hybrid)

TERM
- Permanent

SALARY- £45,000 to £60,000 per annum

BENEFITS – Pension, Hybrid Working, Training & Development, Career Progression, Annual Leave, Company Benefits etc.

We are an innovative technology company developing cutting‑edge AI solutions for a diverse range of commercial clients. As we continue to invest in artificial intelligence and emerging technologies, we are looking to expand our growing AI team with the addition of a Junior Prompt Engineer.

We are looking to hire a Junior Prompt Engineer with a passion for Generative AI and Large Language Models (LLMs). This is an excellent opportunity for a recent graduate or early‑career professional to work alongside experienced AI Engineers and Software Developers, helping to design, test, and optimise AI‑powered solutions used across a variety of real‑world applications.

The Junior Prompt Engineer MUST have:
  • A degree qualification (2:1 or above preferred) in Computer Science, Artificial Intelligence, Data Science, Software Engineering, Mathematics, Physics, Engineering, or another STEM discipline
  • A genuine interest in Generative AI and Large Language Models (LLMs)
  • Basic to intermediate Python programming skills
  • Experience using AI tools such as ChatGPT, Claude, Gemini, or similar LLMs
  • Strong analytical and problem‑solving skills
  • Excellent communication skills (both verbal and written)
  • A willingness to learn, develop, and build a career within AI
The Junior Prompt Engineer will ideally have the following attributes:
  • An understanding of prompt engineering principles and AI best practices
  • Experience working with OpenAI, Anthropic, or Azure OpenAI APIs would be beneficial
  • Knowledge of AI frameworks such as Lang Chain, Llama Index, or similar
  • Familiarity with Git and Git Hub version control
  • Experience with SQL and REST APIs would be advantageous
  • Knowledge of vector databases and Retrieval‑Augmented Generation (RAG) concepts would be beneficial
  • Exposure to cloud platforms such as Microsoft Azure or AWS
  • Experience using automation tools such as Power Automate, n8n, or Zapier would be advantageous
  • A proactive approach with a passion for learning new technologies
The Junior Prompt Engineer role will involve:
  • Designing and refining prompts to improve the performance, accuracy, and reliability of AI models
  • Building AI workflows that integrate Large Language Models, APIs, databases, and automation platforms
  • Testing and evaluating AI model performance through prompt optimisation and benchmarking
  • Working closely with software engineers and stakeholders to develop AI‑powered applications
  • Applying Python and prompt engineering techniques to solve real‑world business challenges
  • Researching emerging AI technologies and recommending improvements to existing solutions
  • Maintaining prompt libraries, technical documentation, and AI best practices
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