Data Scientist (LLMs)

Connexai; Manchester; Hybrid; GBP 60,000 - 95,000; Full time

Job summary

Connexai in Manchester is looking for a Data Scientist to join the growing LLM team. You will train models, create datasets and push performance boundaries for production-ready large language models powering real enterprise applications.

The role offers collaboration with engineers and researchers in a fast-moving, research-informed environment, focused on shaping AI-driven communication tools.

Qualifications

• MSc or PhD in Computer Science, Data Science, Mathematics, Physics, or a related field.
• Curiosity, rigour, and drive to improve model performance.

Responsibilities

• Train and fine-tune LLMs and ML models using standardised experiments and high-quality data.
• Build and improve LLM-based systems for low-latency RAG systems, intent detection, call scoring, and email classification.
• Support real-time inference infrastructure with ultra-low latency and detailed monitoring.
• Create and maintain evaluation datasets to test safety, prompt following, and conversational quality.
• Collaborate with engineers and researchers to apply new ideas from the latest LLM and ML research.

Education

MSc or PhD in Computer Science, Data Science, Mathematics, Physics, or a related field

Job description

Location: Manchester, UK (Hybrid – 3 days in the office)

Build the Future of AI-Powered Communication

We’re looking for a Data Scientist to join our growing LLM team, building production-ready large language models that power real enterprise applications. You’ll help train models, create datasets, and push performance boundaries in a fast-moving, research-driven environment.

What You’ll Do

• Train and fine-tune LLMs and ML models using standardised experiments and high-quality data.
• Build and improve LLM-based systems for low-latency RAG systems, intent detection, call scoring, and email classification.
• Support real-time inference infrastructure with ultra-low latency and detailed monitoring.
• Create and maintain evaluation datasets to test safety, prompt following, and conversational quality.
• Collaborate with engineers and researchers to apply new ideas from the latest LLM and ML research.

What We’re Looking For

• MSc or PhD in Computer Science, Data Science, Mathematics, Physics, or a related field.
• Curiosity, rigour, and drive to improve model performance.

Why Join Us

• Work on real applied LLMs from training to deployment.
• Collaborate with an ambitious, research-informed team.
• Shape the next generation of AI-driven communication tools.