Founding Engineer - WarrenAI

Founders Factory Ltd.; City of Westminster; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading AI financial coaching firm in the UK is seeking a talented developer to build and optimize their ecosystem of AI features. This role involves prototyping new capabilities and working across Python and modern front-end frameworks like Next.js. The ideal candidate is passionate about AI, eager to shape product direction from the beginning, and motivated by the challenge of creating human-like financial advice. A meaningful equity stake and significant autonomy in product development are offered.

Benefits

Equity stake

Massive autonomy

Qualifications

• Experience in building and optimizing AI features.
• Knowledge in Python and front-end frameworks.
• Strong ability to work in a fast-paced, iterative environment.

Responsibilities

• Build and connect AI features ecosystem.
• Prototype new capabilities and measure impact.
• Work across Python and lightweight frontends.
• Explore contextual and personalized AI advice.
• Shape product direction from day one.
• Passionate about agentic, LLM-first products.

Skills

Python

AI feature development

Front-end development

FastAPI

Next.js

Team collaboration

Agile methodologies

Tools

AWS

Vercel AI SDK

TypeScript

Job description

Warren AI is your personal AI financial coach - making expert financial planning accessible to everyone, not just the wealthy few. Forget £2,000-a-year human advisors with clipboards or the endless DIY rabbit hole online. With Warren, you have honest, human-like conversations about your money - and get personalized, step-by-step plans to achieve your financial goals, plus instant projections for life's big decisions. This isn't another chatbot. It's a trusted partner that cuts through jargon and gives you the clarity that normally costs thousands - now available 24/7, for a fraction of the price. Check it out here: https://meetwarren.co.uk/

Why This Matters

Only 1 in 10 people ever use a financial advisor. That leaves millions of successful professionals stressed, stuck, and financially under-optimized. The result? A generation that earns well but feels behind. We believe that's unacceptable - and solvable. By using AI to deliver personalized, judgment-free coaching at scale, we're democratizing financial clarity and confidence. If we succeed, we'll fundamentally change how an entire generation builds wealth.

Why Now

Breakthroughs in AI and changing market dynamics have created a once-in-a-decade opportunity. People are turning to generic chatbots for financial advice - even though those tools were never built for such a high-stakes, deeply personal domain. The gap between what people need and what's available has never been wider. And we're here to bridge it.

Responsibilities

• Build, optimise, and connect our ecosystem of AI features - from RAG pipelines to agents to evaluation tooling.
• Prototype new capabilities fast measure impact iterate.
• Work across Python and lightweight frontends (Next.js) to bring complex backends to life.
• Explore ways to make AI advice more contextual, more personalised, and more human.
• Help shape product direction and engineering culture from day zero.
  Comfortable working with modern backend LLM tooling: APIs, agents, prompt engineering, context management, evals.
• Passionate about building and optimising agentic, LLM-first products.
• Bonus: experience with voice AI or multimodal interfaces.
• A strong bias to ship fast and learn from users.
• Excited by the challenge of B2C: big reach, messy data, rapid iteration.

Our Stack (So Far)

FastAPI · Python (AI) · LiveKit · Next.js + TypeScript · Vercel AI SDK · AWS

Equity and Autonomy

• A meaningful equity stake as part of the founding team
• Freedom to build and scale the product your way - with massive autonomy.