Senior Software Engineer

🌍 Senior Software Engineer | GreenTech | Up to £90,000🌍 GreenTech Scale-Up🏆 Global XPRIZE Winner🤖 AI-Driven Engineering Culture🛠️ End-to-End Product Ownership💰 £80,000-£90,000 + Stock Options📍 Hybrid | Waterloo | 1 Day Per WeekI'm working with an exciting GreenTech scale-up that's hiring a Senior Software Engineer to help build the technology behind one of the world's most important carbon-removal challenges.Recently recognised as one of the global winners of the $100M XPRIZE, the company is now scaling the software platform that supports carbon removal globally.This Senior Software Engineer role offers the chance to build software with genuine real-world impact. You'll work across scientific data, operational workflows, infrastructure and customer-facing products, helping turn complex real-world processes into reliable, scalable technology.The Senior Software Engineer OpportunityAs a Senior Software Engineer, you'll join a small, high-calibre team with meaningful ownership from day one.This isn't a role where you'll simply pick up tickets. You'll help shape product direction, influence architecture, improve engineering practices and own software throughout the full development lifecycle.The environment is fast-moving and collaborative. The team wants a Senior Software Engineer who is flexible across technologies, comfortable operating through ambiguity and more interested in solving the right problem than defending a particular language or framework.What You'll Be Doing✅ Own product features end-to-end, from discovery and technical design through to deployment and production support.✅ Build software that supports complex scientific processes, operational workflows and strict data-integrity requirements.✅ Work closely with Product, Science, Operations and external partners to turn complex requirements into usable software.✅ Contribute to architecture, cloud infrastructure, Infrastructure as Code, CI/CD and engineering standards.✅ Help improve testing, reliability, maintainability and repeatable software delivery.✅ Shape how AI is adopted across engineering, improving the software development lifecycle and potentially wider company workflows.What They're Looking for in a Senior Software Engineer✅ A product-minded Senior Software Engineer who cares about why something is being built, not just whether it meets the specification.✅ Experience owning software across the full lifecycle, including design, development, deployment and production maintenance.✅ Strong architectural judgement and the ability to balance speed, simplicity and long-term scalability.✅ Comfort working across the stack and choosing the right technology for the problem.✅ Experience building data-intensive applications with complex business rules, invariants or data-integrity requirements.✅ A collaborative, low-ego approach with strong communication skills and positive energy.✅ Startup or scale-up experience, or evidence that you thrive in environments with ambiguity, ownership and changing priorities.✅ Practical experience helping engineering teams adopt AI beyond basic coding assistants.This could include:• Building AI or LLM-powered product functionality• Creating MCP servers, internal agents or developer tooling• Introducing workflow automation through tools such as n8n• Improving testing, documentation, development or knowledge-sharing through AI• Helping teams identify where AI genuinely adds value and where it does notTech StackC# | React | Python | AzureDirect experience with every technology isn't essential. They're much more interested in hiring a strong Senior Software Engineer who is adaptable, technically curious and able to select the right tool for each problem.The role could also suit an emerging Senior Software Engineer who is ready to take on broader ownership within a small, ambitious engineering team.Package and Working Setup💰 £80,000-£90,000 + Stock Options📍 Waterloo, London, around one day per weekThe wider package includes private healthcare, 25 days' annual leave, enhanced family policies and an industry-leading pension contribution.If you're a Senior Software Engineer looking to build consequential software, influence product and architecture, and help shape how AI changes modern engineering, I'd love to tell you more.