Founding Full Stack Developer

Full Stack Developer – TypeScript | GreenTech Start-up | £65k

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.

The opportunity

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.

Tech environment

• TypeScript (full stack)
• MongoDB
• Product-led, start-up engineering environment
• Strong emphasis on reliability, data, and maintainability

What they're looking for

• 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

Location & working pattern

• UK-based
• Flexible across
  London, Manchester, or Edinburgh
• Preference for
  3 to 4 days onsite ideally
  , with flexibility for the right candidate

Salary

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

Why this role?

• 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.