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AI Research Engineer at Arva AI

Join Arva AI, a YC S24-backed startup revolutionizing financial crime intelligence. As an AI Research Engineer, you’ll work alongside a team of 14 in Central London, including the former financial crime product lead from Revolut. You will be responsible for fine-tuning LLMs, training custom vision models for fraud detection, and building the evaluation infrastructure for systems already processing 100,000+ alerts monthly. This is a high-impact role offering competitive equity and the chance to define the future of compliance.

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Arva AI

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Location

London, United Kingdom

Compensation

£80k-£120k + Equity

Company

Arva AI

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Role overview

As an AI Research Engineer at Arva AI, you will develop and refine the core models powering automated AML and KYC workflows. You will lead applied ML research, fine-tuning LLMs and vision models to automate 80% of manual human review. Your work directly scales compliance operations for high-growth global fintechs.

SoftwareLewes, United States

Backed by Google’s AI fund and Y Combinator, Arva AI is revolutionising financial crime intelligence with our cutting-edge AI Agents. By automating manual human review tasks, we enhance operational efficiency and help financial institutions handle AML, KYB and KYC reviews, cutting costs by 80%.

What you will do

  • Design and implement rigorous evaluation frameworks, benchmarks, and backtests to quantify model performance and prevent regressions in production compliance workflows.
  • Fine-tune large language and vision models for specialized tasks including document fraud detection, web-scale due diligence, and automated report generation.
  • Build human-in-the-loop continuous improvement pipelines that leverage analyst feedback to curate datasets and iteratively optimize model accuracy and reliability.

Who this is a fit for

  • Has at least 3 years of experience in AI research or engineering with a proven track record of building and deploying agentic systems.
  • Possesses deep technical expertise in prompt engineering, model fine-tuning, and working with both LLMs and computer vision models in production.
  • Maintains a strong product mindset and the ability to work across the stack, with TypeScript experience being a significant advantage for integration.

Why this role is remarkable

  • Join a YC S24 startup backed by Google’s Gradient Ventures that is fundamentally transforming how financial institutions fight crime through agentic AI.
  • Work directly with CEO Rhim Shah, formerly the financial crime product lead at Revolut, to solve deep operational bottlenecks in the global banking sector.
  • Apply cutting-edge research to a production environment already processing over 100,000 monthly compliance alerts for US and Canadian fintech partners.

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