Founding Full Stack Developer | 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, 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