Staff Fullstack Engineer

Staff Full Stack Engineer / Product Engineer

Remote first

£110,000–£120,000 | Python, TypeScript, React, Ambiguity Management

Immersum is partnering with a high growth energy technology business looking for a Staff Full Stack Engineer with a strong product mindset, ideally from a Product Engineer or Forward Deployed Engineer background.

This is a hands-on role for someone who enjoys working closely with customers, owning products end to end and making technical decisions in a fast-paced environment.

The Role:

• Own end-to-end product delivery, from discovery to production

• Build customer-facing applications and scalable backend systems

• Work closely with customers to turn problems into software solutions

• Drive architecture and technical direction

• Develop AI-powered and agentic workflows

• Mentor engineers and raise technical standards

Requirements:

• Experience as a Product Engineer, Forward Deployed Engineer or Full Stack Engineer

• Strong Python and TypeScript skills

• Experience building customer-facing products end to end

• Background in a high-growth startup or scale-up

• Strong system design skills and comfort with ambiguity

• A hands-on approach, strong ownership and a bias towards shipping

Why Join:

• Build AI-native technology transforming the energy market

• Genuine ownership and technical influence

• Remote-first working with optional London office access

• Competitive salary and equity