Forward-Deployed LLM Data Scientist (London) Equity

Zettafleet; Greater London; On-site; GBP 75,000 - 120,000; Full time

Benefits offered by this job

Discretionary bonus

Equity

Benefits package

28 days leave

Job summary

Zettafleet is an end-to-end platform for training LLMs on proprietary data. We seek a Forward-Deployed LLM Data Scientist who embeds with client teams to turn raw data into training-ready formats and advise on data lifecycle.

Based in London on-site with travel to UK/overseas, you will work with in-house teams on CPT, SFT, DPO and RL workflows, building pipelines and refining data strategies to deliver high-impact AI solutions.

Qualifications

• LLMs: experience with training/fine-tuning and model evaluation.
• Data Science: 1+ years using Python; overall 2+ years programming.
• Problem solving: strong analytical skills and attention to detail.
• Ownership mindset: take full responsibility for outcomes and deliverables quality.
• Collaboration and communication: exceptional verbal and written skills to explain DS concepts to execs and technical audiences.

Responsibilities

• Partner with customer teams to understand business roadmap and data infrastructure.
• Build data pipelines to transform raw data into training-ready formats.
• Design data cleaning, filtering, deduplication and synthetic data generation for CPT, SFT, DPO and RL.
• Continuously evaluate data and refine training strategies to optimise performance.
• Collaborate with in-house engineering, research and data teams to solve data challenges.
• Capture insights to influence Zettafleet's core product roadmap.
• Occasionally travel to the customer's site in the UK or overseas.

Skills

LLM fine-tuning

Data pipelines

Python programming

Problem solving

Ownership mindset

Communication skills

Job description

Zettafleet is an end-to-end platform for training LLMs on proprietary data. We seek a Forward-Deployed LLM Data Scientist who embeds with client teams to turn raw data into training-ready formats and advise on data lifecycle.

Based in London on-site with travel to UK/overseas, you will work with in-house teams on CPT, SFT, DPO and RL workflows, building pipelines and refining data strategies to deliver high-impact AI solutions.