Prompting Engineer

Are you passionate about shaping the future of Artificial Intelligence? We are seeking a skilled AI Prompt Engineer to join our dynamic Commercial Digital team. In this role, you will take ownership of the behavior of Large Language Model (LLM)-driven agents in production.

Working within an established framework, you will develop and tune prompts, design evaluations for individual AI agents, and implement self-optimizing feedback loops. Your mission is to ensure our customer-facing AI outputs remain highly accurate, on-brand, legally compliant, and cost-efficient.

• Develop & Tune Prompts: Craft and maintain high-performing prompt architectures—including system prompts, tool instructions, guardrails, and output schemas—for production AI agents.

• Evaluate & Test: Build and execute evaluation suites and regression tests for individual agent behavior. Define quality metrics and acceptance thresholds in collaboration with business owners.

• Optimize Performance: Design and operate A/B testing for prompt and model variants, utilizing feedback loops that learn from human review outcomes to focus on single-agent optimization.

• Drive Cost Efficiency: Support LLM optimization efforts, focusing on model selection, context-window management, structured outputs, and token efficiency.

• Guard Quality & Tone: Maintain tone-of-voice and multi-language consistency for customer-facing communications, utilizing professional British English B2B standards as the baseline.

• Risk Mitigation: Stress-test guardrails against adversarial inputs, edge cases, and hallucination risks within defined safety standards before prompt release.

• Document & Collaborate: Document prompt patterns, test coverage, and evaluation results, enabling business users and reviewers to provide structured feedback.

• Reporting: You will report directly to the Head of Commercial Digital, receiving day-to-day technical guidance and mentorship from our Level A Senior Prompt Engineers.

• Autonomy: You will work within defined organizational standards. Production prompt changes will be peer-reviewed before deployment to ensure quality assurance.

• Experience: 1+ year of practical, hands-on experience working with LLM applications (including prompting, Retrieval-Augmented Generation (RAG), and structured outputs).

• Track Record: Proven exposure to systematic testing, data validation, or Quality Assurance (QA) of AI/ML systems.

• Technical Skills: Strong prompt-writing craft, disciplined experimentation habits, and basic Python or data-handling skills to run evaluation pipelines.

• Language Skills: Exceptional written English with a strong sensitivity to tone, style, and nuance in professional B2B communication.

• Professional Attributes: Clear documentation skills, attention to detail, and a structured approach to processing user feedback.

• Preferred Skill: Previous experience with the Microsoft AI stack (Azure OpenAI, Azure AI Foundry, or Copilot Studio) is a significant advantage.

We expect our team members to drive growth, embrace innovation, and inspire others. You will succeed in this engineering role if you align with our core behaviors:

• Inspire Your People: Simplify complexity, act with the long-term vision in mind, and learn from setbacks with high integrity.

• Strengthen Your Team: Set the bar high for AI quality, collaborate across departments, and foster a growth mindset.

• Grow Your Business: Put customers at the heart of your prompt designs and proactively look for ways to improve automated processes.

• Own It: We believe in teamwork, keeping promises, and building our brands together.

• Aim High: We are bold, positive, and strive to perform at our best.

• Be True: We act with absolute integrity to win for our stakeholders, colleagues, and the environment.

About us - Malvern Panalytical, Micromeritics and SciAps. 
Together we are a powerful and highly complementary combination of market leading technologies. 

We are the toolmakers for the world's most innovative companies, academic institutions, and government laboratories. We are their partners in discovery.

Malvern Panalytical instruments analyze the chemical, physical and structural nature of materials, from proteins to polymers and semiconductors to minerals. Our leading technologies measure particle size, shape, concentration and zeta potential, biomolecular interactions and stability, elemental concentrations and crystallographic structure.

Micromeritics manufactures systems for the characterization of particles, powders, and porous materials for a wide- range of end markets including catalysts, chemicals, building materials, clean-tech and battery.  Our leading technologies measure surface area, porosity, density, adsorption and particle activity.

SciAps specializes in portable X-ray fluorescence (XRF), laser-based (LIBS) and near-infrared (NIR) analyzers to measure any element in any environment. SciAps is the Center of Excellence for our handheld instruments.
We have a global footprint with R&D and manufacturing sites in North America, Europe, and Asia.

We are more than 2,500 employees in a customer-focused organization with sales and service offices in 20 countries, all committed to delivering expert and responsive customer support.

We are part of Spectris. Spectris combines precision with purpose, delivering progress for a more sustainable world. Precision is at the heart of what we do – our leading, high-tech instruments and software equip our customers to solve some of their greatest challenges to make the world cleaner, healthier and more productive.

Malvern Panalytical, Micromeritics & SciAps
Your Partners in Discovery

Malvern Panalytical, Micromeritics and SciAps, part of the Spectris Group, are committed to a diverse and inclusive culture where everyone can thrive and achieve a fulfilling career. Changing the world isn’t something you can do on your own, or with a single way of thinking; it takes a wide collection of experiences, stories, knowledge, and expertise. We encourage applications from underrepresented individuals and people with diverse backgrounds. Although we always select the most qualified applicant for each role and make all decisions without regard to race, sex, age, or any other protected class, we are an inclusive, equal opportunity organization that prizes diversity. Your unique perspective is important to us.