Founding Product Engineer | Typescript/Javascript | Up to £120k

Bluebird; Greater London; Hybrid; GBP 96,000 - 120,000; Full time

Job summary

Bluebird in London is building AI that lets the world's biggest brands understand customers faster, replacing slow focus groups with scalable interviews. You own features end to end, from the customer conversation to shipping in production, and you’ll drive frontend and backend work in a fast, autonomous environment.

You’ll integrate LLMs into real products, lead conversations with customers roughly weekly, and ship user-facing features in React and TypeScript, using Claude Code and agentic

Qualifications

• You live to build (ex-founders, hackathon regulars, relentless side-project shippers).
• Strong production experience across frontend and backend (6+ years, though exceptional 5-year builders from AI companies are welcome).
• Experience integrating LLMs into real products.
• AI-native: you reach for Claude Code and agentic tooling first.
• You thrive on autonomy and speed, not hand-holding.

Responsibilities

• Own features end to end, from the customer conversation to shipping in production.
• Build the AI product itself: LLM orchestration across providers, prompt engineering, and evaluating model output.
• Ship user-facing features in React / TypeScript.
• Talk directly to customers (roughly weekly) and turn what you hear into what you build.

Skills

Frontend development

Backend development

React

TypeScript

LLM integration

Customer interviews

Tools

Claude Code

Agentic tooling

Job description

Help build the AI that's reinventing how the world's biggest brands understand their customers. Instead of slow, expensive focus groups and weeks of manual analysis, their AI interviewer runs hundreds of real video and voice interviews overnight and turns them into usable insight in hours.

About the company: who will you join?

• YC-backed AI research platform (S24)
• Already in production with global enterprise brands across FMCG, tech and telecoms
• Scaling fast: ~20 → 80+ people this year, on track for 120

About the role: what will you do here?

• Own features end to end, from the customer conversation to shipping in production
• Build the AI product itself: LLM orchestration across providers, prompt engineering, and evaluating model output
• Ship user-facing features in React / TypeScript
• Talk directly to customers (roughly weekly) and turn what you hear into what you build

About you: what experience do you bring?

• You live to build (ex-founders, hackathon regulars, relentless side-project shippers)
• Strong production experience across frontend and backend (6+ years, though exceptional 5-year builders from AI companies are welcome)
• Experience integrating LLMs into real products
• AI-native: you reach for Claude Code and agentic tooling first
• You thrive on autonomy and speed, not hand-holding

Salary package is up to £120k + meaningful equity, London hybrid

"No product managers. No tickets. No layers. You talk to the customer, decide what to build, and ship it with full trust from day one."