AI Research Engineer (£80k-£120k + Equity) at Arva AI

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. Job Title AI Research Engineer Salary £80k-£120k + Equity Company Description Arva AI is a YC S24-backed startup that raised a $3M seed round led by Gradient Ventures to automate financial crime compliance using AI agents. Job Description 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. Location London, UK 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. 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. The ideal candidate * 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. Who are Jack \& Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. How does this work? * Jack's an AI agent for job searching and career coaching. He works for you. * Jill is the AI recruiter working for the company. She recruits from Jack's network. * If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.