AI Engineer

Working closely with our machine learning and product teams, this role is perfect for a driven, analytical problem-solver ready to build, train, and scale the core AI models and pipelines that power Hertzian’s innovative feedback-analysis products., Design, train, and fine-tune machine learning and deep learning models tailored for text classification, sentiment analysis, and pattern recognition.

• Data Pipelines Build and optimize scalable data ingestion and preprocessing pipelines to clean, structure, and feed high-volume customer feedback data into models., Collaborate with product and backend teams to integrate trained models into production-ready APIs, monitoring performance and drift.

• Research & Innovation Stay at the forefront of AI research, experimenting with emerging LLM capabilities and novel algorithms to continually enhance insight accuracy., * Work Model: 100% Office-based attendance required.

• Software: Confident with Python, ML frameworks, Git, and JIRA.
• Right to Work: Must have the right to work in the UK.*

*Please note: While Hertzian is licensed to issue Sponsorship Visas, we are not electing to do so for this position.

Day-to-Day Activities

• • Training and fine-tuning machine learning models.
• • Preprocessing and analyzing complex feedback datasets.
• • Participating in daily stand-ups and AI sprint planning.
• • Reviewing peer model logic and submitting pull requests.
• • Collaborating with engineers on production deployments.

You are an analytical, research-minded, and innovative professional with a passion for artificial intelligence and natural language processing. You thrive in technical environments and understand the nuances of deploying machine learning models into production.

Deeply curious yet collaborative, you have the ability to design efficient AI workflows and naturally translate complex dataset patterns into robust, scalable intelligent features., * Strong academic background or demonstrable project experience focused on Machine Learning, Natural Language Processing (NLP), or Artificial Intelligence.

• Proficiency with core AI/ML libraries and languages, including Python, PyTorch/TensorFlow, Scikit-Learn, and LLM integration frameworks.
• Demonstrable experience with data preprocessing, model fine-tuning, evaluation metrics, and optimizing inference performance.

Voted the Best Place to Work in Cornwall (2025 & 2026), Hertzian is a multi-award-winning AI company headquartered in Truro. We specialise in using cutting-edge Machine Learning to transform customer feedback into actionable insights. Join an innovative team dedicated to pushing boundaries and fostering tech talent.