Founding Full Stack Developer

I'm working with an early-stage UK GreenTech start-up building software that supports sustainability-focused, real-world systems, not consumer apps or vanity features.

This is a genuinely early engineering hire into a small, ambitious team where engineering decisions directly influence how the business operates and scales. If you enjoy start-up environments with autonomy, responsibility, and visible impact, this role is a strong fit.

They're looking for a hands-on Full Stack Developer to take ownership of an existing platform and help shape the next phase of development.

In the short term, you'll:

• Own and evolve a live TypeScript-based system used daily by the business

• Work closely with founders and stakeholders to stabilise and improve core functionality

As the platform matures, you'll:

• Lead greenfield development of new internal tools

• Build systems focused on data capture, operational insight, and reporting

• Influence architecture, tooling, and technical direction as the engineering function grows

• Help shape software that supports sustainability-driven outcomes

This is very much a start-up role - ambiguity, ownership, and learning are part of the job.

• TypeScript (full stack)

• MongoDB

• Product-led, start-up engineering environment

• Strong emphasis on reliability, data, and maintainability

• A Full Stack Engineer comfortable working end-to-end

• Someone who enjoys early-stage start-ups and taking ownership

• Experience maintaining live systems as well as building new functionality

• Product-minded, pragmatic, and able to see the bigger picture

• Clear communicator, comfortable working with non-technical stakeholders

• UK-based

• Flexible across London, Manchester, or Edinburgh

• Preference for 3 to 4 days onsite, with flexibility for the right candidate

• Circa 65,000, with some flexibility depending on experience

• Join early in a mission-led GreenTech business

• High ownership and influence over product and engineering decisions

• Blend of stability (existing systems) and greenfield development

• Opportunity to grow alongside the company as it scales

• Build software that contributes to meaningful sustainability outcomes

If you're a Full Stack Engineer looking for a proper start-up role in GreenTech.

With autonomy, ownership, and room to grow: this is well worth exploring.

Happy to share more detail on a confidential basis.