As an early AI Engineer, you will design and optimize sophisticated agentic systems that transform how investment professionals analyze complex data. You will own features from conception to production, building high-reliability reasoning chains and integrating diverse data sources to deliver deep insights for institutional clients in a high-velocity, growth-oriented environment.
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Senior AI Engineer at fast-growing AI startup
Are you a senior engineer looking to define the next generation of AI agents? This well-funded startup is building an AI operating system for the world's leading investment firms. You’ll own the development of sophisticated reasoning chains and agentic frameworks, working directly with a founding team in London. With significant equity and a culture that values deep domain expertise, this is a rare chance to join an ultra-growth venture while it's still early and shape the future of professional AI tools.
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Location
London, United Kingdom
Compensation
Not Disclosed + Equity
Company
Confidential company
Role overview
About the company
Fast-growing enterprise AI startup
What you will do
- Design and implement advanced AI agent architectures and reasoning chains to automate expert-level professional tasks.
- Optimize prompts and integrate new LLM models and research to keep the platform at the cutting edge of AI capabilities.
- Build and maintain scalable data pipelines and agentic frameworks using Python, FastAPI, and vector databases.
Who this is a fit for
- At least 4 years of software engineering experience with significant focus on AI/ML systems at venture-backed or top-tier tech firms.
- Proven track record of taking complex AI products or features from initial ideation through to production at scale.
- Technical proficiency in Python, LLMs (OpenAI/Anthropic), RAG pipelines, and managing unstructured data in Postgres or ElasticSearch.
Why this role is remarkable
- Influence the core architecture of an AI operating system backed by premier venture capital firms and industry leaders.
- Solve complex technical challenges in agentic reasoning, RAG pipelines, and scalable document ingestion at a critical growth stage.
- Benefit from a high-impact environment with rapid career progression, equity upside, and a culture of technical excellence.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.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.
I recruit from Jack’s network and make the intro when I spot a great match.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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
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 your profile’s a match and Confidential company wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.