Senior Full Stack Software Engineer

About Neutreeno

Climate change is the defining business challenge of our time, and we're here to solve it. Most decarbonisation solutions count emissions but do nothing to reduce them. We've changed that.

We’re Neutreeno, an emissions-to-performance platform, born out of the University of Cambridge's Department of Engineering. We help companies with supply chains and production processes turn emissions data into operational insight, the kind that cuts costs, sharpens decisions, and unlocks genuine competitive advantage. For operations and finance, it's margin they can measure. For sustainability teams, it's progress they can prove. Same data, two audiences, one engine.

We’re a fast-moving team that values EQ just as much as IQ. Autonomy, high-ownership, speed and no-ego collaboration are at our core. We seek people who care deeply and are eager to work on solving problems bigger than themselves.

The Role

The engineering problems here are genuinely hard. It involves building robust ingestion pipelines that handle messy, heterogeneous data, a calculation engine that estimates the correct emissions across complex activity hierarchies, and actionable insights that help make the biggest companies in the world better. Wrapped in an experience that must be easy to use.

As a Senior Full Stack Software Engineer and key member of the Neutreeno team, you’ll be shipping great software, bringing strong engineering judgment, and making the team better through craft and collaboration.

You’ll ship across the full stack, crafting clean React UIs, building reliable Node.js and Python services, and deploying to AWS. You’ll own features end-to-end alongside a small, strong engineering team, and you’ll have real influence over how the product evolves.

You also use AI coding tools and agentic workflows as a force-multiplier, and you’re actively curious about how they change what a small engineering team can achieve.

This position operates on a hybrid work model with 3 days per week in our Cambridge office. Fully remote arrangements may be considered for outstanding international candidates, provided there is sufficient overlap with UK working hours.

The Work You’ll Do

Software Development

• Build responsive, modular UIs in React and TypeScript that make complex emissions data feel simple and intuitive.
• Develop and maintain backend services in Node.js, designing clean APIs and working with cloud-native AWS infrastructure.
• Ship features end-to-end: from picking up a product brief to deploying to production via our CI/CD pipelines.
• Contribute to the technical direction of Neutreeno, helping inform architectural decisions that balance speed, quality, and long-term scalability.
• Champion AI-native development practices and agentic workflows across your own work and actively share that thinking with the wider team.

Collaboration and Product

• Partner closely with the Neutreeno team to translate product ambitions into well-scoped, well-sequenced engineering work.
• Feed into the engineering roadmap, providing strong technical input on prioritisation, feature velocity, and technical health.
• Contribute to hiring decisions and help shape an engineering culture that helps Neutreeno scale.
• Communicate clearly about technical decisions and progress with product, design, and the wider team.

Requirements

The Minimum Qualifications You’ll Need

• 7 or more years of professional software engineering experience.
• A strong individual contributor deeply motivated to stay hands-on in the codebase, with a collaborative approach to sharing knowledge and raising quality across the team.
• Deep proficiency across the full stack, including React and TypeScript on the front end and Node.js on the back end.
• Solid experience with AWS infrastructure and cloud-native deployment.
• A proven track record of shipping high-quality software at pace.
• Real, daily use of AI coding tools and agentic development workflows as a core part of how you work.
• Strong communication and the ability to build trust quickly across engineering, product, and leadership.

Preferred Qualifications

• Experience at an early-stage startup as a senior individual contributor.
• Familiarity with GraphQL, Terraform, or CI/CD pipeline design.
• Experience integrating LLMs or building AI-powered product features.
• Exposure to climate, sustainability, or deep-tech domains.
• Degree in Computer Science or a related field (not required, track record speaks louder).

Benefits

What We Offer

Compensations & Benefits:

• Competitive pay dependent on your skills, qualifications and experience.
• Year-end performance bonus.
• 25 days annual leave.
• Meaningful equity stake. We want you to think and benefit like an owner as the company grows.
• Company pension with NEST.
• Leading private health insurance with WPA (the only Which? Recommended Provider for Private Medical Insurance).
• Cycle to work scheme.

Work Environment:

• A hybrid work model that fosters both teamwork and individual flexibility.
• Remote working allowance for personal travel, in addition to regular holiday policy (2 weeks per year).
• Work from Neutreeno HQ at the Cambridge Institute for Sustainability Leadership, recognised by the FT as one of Europe's leading startup hubs.
• Great on-site amenities (unlimited free coffee, monthly events with global sustainability leaders, and more).

Culture & Growth:

• A fast-growing team (200%+ YoY growth) from diverse backgrounds that recently closed a $5M seed round.
• An open-minded culture with a flat hierarchy and everyone vectoring in the same direction and where ideas and ownership matter.
• The chance to work alongside world-class climate scientists and engineers on one of the most important problems of our time.

How to Apply

If you’re a senior engineer who loves great code, thrives in a fast-moving environment, and has a genuine point of view on how AI tooling fits into modern development, we want to hear from you. To apply, send your CV and a cover letter covering two things: how AI tooling features in your day-to-day development work, and what's drawing you to Neutreeno specifically.

Neutreeno is an equal opportunity employer committed to creating an inclusive workplace.