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Job Description

AI- | 0→1 Build | Series B

We are in the most exciting era for product builders in decades.

I’m hiring a Senior Fullstack Product Engineer for an AI- London startup building collaborative, LLM-powered tools from first principles.

Stack: TypeScript, Node, React, Postgres, AWS

Comp: Above-market salary + meaningful equity

This is senior in scope - not just years.

You will:

• Own complex user-facing features end-to-end

• Build agentic workflows and real-time collaboration systems

• Prototype rapidly with LLM integrations

• Work directly with users to shape product direction

• Help unlock the next 100x users

They want someone who:

– Has shipped production systems in fast-moving environments

– Thinks like a product partner, not a task executor

– Cares deeply about UX, speed and performance

– Thrives in ambiguity

– Wants to build, not maintain

This is not a scale-up optimisation role.

It’s a senior builder role in a company still defining itself.

Suitable for people who are strongest when ownership is high and the playbook doesn’t exist

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.