Staff Software Engineer, AI (up to £200k)

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. *If you're interested sign up to Dex to apply.* Dex is an AI recruiter agent that helps you run your job search. Tell Dex your stack, seniority, and what you want to build. We will manage your applications and surface other opportunities that are a fit. The role This company builds a global tax automation platform, solving genuinely complex regulatory problems for large digital businesses. They're backed by leading investors and have significant ARR, with a clear mandate to apply AI to a domain rich in structured data and multi-jurisdiction edge cases. This isn't a research role disconnected from production. You'll be the first Staff AI Engineer, shaping how LLMs and agentic systems are applied across the product, from prototyping intelligent workflows to building natural language interfaces. Expect end-to-end ownership, defining the playbook rather than inheriting one. The work * Define the AI strategy and roadmap, identifying high-leverage applications for LLMs and agentic systems across the product. * Design and build backend services for AI workflows, from initial prototypes to production-ready systems. * Develop and optimise prompt engineering strategies for complex tax compliance scenarios. * Build robust evaluation pipelines to ensure model accuracy, safety, and reliability in a regulated domain. * Architect and implement internal and customer-facing agent platforms. What You Bring * 5+ years building customer-facing products with end-to-end ownership in a high-quality software environment. * Deep, hands-on experience with LLMs, prompt engineering, and agent frameworks, including production experience with RAG architectures. * Proven ability to design and implement evaluation pipelines for AI models. * Strong product instincts combined with technical depth; you can articulate AI choices in both commercial and technical terms. * Comfortable operating in ambiguity, experimenting quickly, and shipping iteratively in a rapidly evolving domain. Why apply through Dex Finding genuinely impactful AI roles that aren't just hype is tough. Dex cuts through the noise, matching you to rare opportunities like this one. Skip the cold application process and get a full brief on the company and role before you even interview. If you're interested, sign up to Dex to apply - https://jobs.meetdex.ai/jobs/7f9ec631-f17c-43eb-b5ec-6695c61caa2f *As part of the recruitment process at Dex, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.*