AI Trainer Contract Jobs in London
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469 Contract jobs sorted by:
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469 Contract jobs
Software Engineer - Kotlin & Coroutines, OUTSIDE IR35, REMOTE
Posted Today by Gravitas Recruitment Group Ltd
Senior Software Engineer - Kotlin & Coroutines. £500/day LTD CO OUTSIDE IR35. 100% REMOTE. An interest in AI (Agenti...
- Rate £500 per day
- Category Outside
- Work type Remote
- Location London, UK
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AI Full Stack Engineer - London
Posted 1 day ago by Randstad Digital
The OpportunityIn this role, you will focus on building production-grade Agentic AI platform architectures.Working withi...
- Rate Negotiable
- Category Undetermined
- Work type Undetermined
- Location London; City of London; East London; Central London; South East London; West London; Canary Wharf; South West London; North London; Greenwich; Stratford
SharePoint SME - UK
Posted 1 day ago by Experis
What you'll be doingLead upgrades from SharePoint 2019 to Subscription Edition (SE)Manage and support SharePoint Online...
- Rate £510 per day
- Category Inside
- Work type Undetermined
- Location UK; London; Birmingham; Manchester; Glasgow; Liverpool; Leeds; Edinburgh; Bristol; Cardiff; Nottingham
Head of Centre of Excellence (CoE) | Outside IR35
Posted 1 day ago by SR2 - Socially Responsible Recruitment
The RoleYou will define how the AI Centre of Excellence operates, engages with delivery teams and governs AI initiatives...
- Rate £650 per day
- Category Outside
- Work type Remote
- Location London, UK
Change Communications Specialist
Posted 1 day ago by AMS CWS
The Role & ResponsibilitiesArup is looking for an experienced Change Communications Specialist to support two major...
- Rate Negotiable
- Category Undetermined
- Work type Hybrid
- Location London; City of London; East London; Central London; South East London; West London; Canary Wharf; South West London; North London; Greenwich; Stratford
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About Our AI Trainer Contract Roles in London
What does a ai trainer contractor do?
The AI Trainer contractor role centres on the ability to generate, review, label, and evaluate the data used to train and improve artificial intelligence models, particularly large language models and other generative AI systems. The work varies depending on the client and model type but typically involves writing high-quality prompt and response pairs, evaluating model outputs for accuracy, helpfulness, and safety, identifying failure modes and edge cases in model behaviour, and providing structured feedback that feeds directly into model fine-tuning and reinforcement learning processes. AI Trainers are primarily engaged by AI companies, technology firms developing AI products, and research organisations building or refining foundation models.
The skills expected depend on the specific domain focus of the engagement. Generalist AI Trainer roles require strong written communication skills, critical thinking, and the ability to evaluate nuanced outputs objectively. Specialist roles in areas such as legal, medical, scientific, or coding content require deep domain expertise alongside the ability to assess AI outputs against the standards of that field. Familiarity with annotation platforms and data labelling tools is useful, as is a conceptual understanding of how large language models work. While AI Trainer contracts can be accessible to candidates without deep technical backgrounds, the highest-value engagements consistently go to those with both domain expertise and a clear understanding of what good AI output looks like.
What is the market like for ai trainer contractors?
The AI Trainer contracting market has grown rapidly in line with the expansion of large language model development, but it is a structurally different market to most other AI contractor disciplines. Volume is high at the generalist end but rates are relatively modest. The more commercially interesting segment involves specialist domain trainers , lawyers, doctors, scientists, and senior engineers , who can evaluate and generate training data in high-stakes technical areas where model accuracy is critical. These engagements command rates more consistent with the underlying domain expertise, and demand in this segment is growing as AI companies seek to improve model performance in regulated and specialist fields.
What is the contracting market like in London?
London dominates the UK contractor market by volume, depth, and rate levels. The capital concentrates the headquarters and major offices of most FTSE 100 companies, the largest global banks, the Big Four professional services firms, and the central government departments that collectively generate the majority of UK contract demand. Every contracting discipline covered on this site has active demand in London, from niche specialisms like threat intelligence and LLM engineering through to high-volume disciplines like project management and business analysis. The sheer density of employers means contractors in London typically have more choice of engagement at any given time than anywhere else in the UK. Day rates carry a premium of 15 to 25 per cent over the national average across most disciplines, reflecting both the concentration of complex, high-value programmes and the cost of operating in the capital.
How much do ai trainer contractors usually earn in London?
Contract rates for ai trainer roles in London typically range from £275 to £495 per day, depending on the scope of the role, required expertise, and the delivery expectations of the engagement.
How many ai trainer vacancies in London are there on Quality Contracts?
Over the past twelve months, we have tracked over 100 ai trainer contract roles across the site, with London accounting for roughly one in three of those. Data reviewed up to June 2026.