Back-end Engineer - London, hybrid. Climate-tech start-up

About CUR8

The science is clear - even if we do everything else right on reducing emissions, the world needs to remove 5-10 Gigatonnes of CO₂ by 2050. There is no Net Zero without carbon removals.

At CUR8, we’re driven by building the worldwide market for carbon removals. We’re on a mission to facilitate 1Bn tonnes of carbon removed in a single year. Today, we’re doing that through our leading science, procurement, and management platform. Empowering companies and financial institutions across the world with insights, carbon credit portfolios, and software tooling to neutralise their emissions.

Today, for companies around the world, we are their Copilot for Carbon Removal.

The role

You will be joining our "Risk Engine" squad.

Evaluating high-quality carbon removal projects is hard. It involves extracting hundreds of data points from complex sources, applying our proprietary efficacy and risk models, and structuring that data so we can surface it to our customers.

Your job is to work with our Lead Software Engineer, Senior AI Engineer and Scientists to build and maintain the services that power these models. You will be the bridge that turns scientific criteria into scalable software.

Requirements:
You’ll be responsible for:

• Building the Application Logic: Writing the code that orchestrates the flow of data (ingesting documents, feeding them to our models, and handling the results reliably).
• Translating Science to Code: Collaborating directly with Carbon Scientists to understand their project criteria and turning those constraints into code logic or prompts.
• Taming Unstructured Data: Building systems that can take messy real-world inputs (PDFs, scientific reports) and extract structured, usable data for our scoring engine.
• Surfacing Insights: Designing the APIs and data structures that allow our Platform team to display these findings to customers in our UI.

Our Tech Stack

For the Risk Engine squad, you will likely be bridging the gap between our core backend and our AI services:

• Core Back-end: Go
• Data stack: Python
• Database: PostgreSQL
• Infra: Google Cloud Platform, Terraform
• AI: Claude, Gemini, GPT

Note: You don't need to be an expert in both Go and Python, but you must be interested in working across both.

Your Technical Skills:

• Production Experience: You have 2+ years of experience building and maintaining backend software.
• Language Fluency: You are comfortable with a statically typed language (Go, Java, Rust, or TypeScript) AND/OR Python.
• Data Wrangling: You have experience (or strong interest) in taking unstructured data and giving it structure.
• AI Curiosity: You might not be an ML expert, but you have played with LLM APIs and understand the basics of prompt engineering.

Benefits:
About the perks:

• The chance to meaningfully contribute to reversing climate change
• Competitive salary + meaningful equity
• £1,000 annual learning & development budget
• 4 weeks/year to work from anywhere 🌍
• 6% pension (salary sacrifice)
• Regular team events, and a bright Shoreditch office
• A culture that respects boundaries, working parents, and different work styles

Our process:

We design our hiring process to be transparent, respectful, and collaborative:

• Intro call: 30-min chat about the role and your goals.
• Skills focused interviews:
• A take-home task (focused on backend logic & data handling).
• A 45-min follow-up with an engineer to dive deeper into your submission.

• Final stage: In-person (or remote), split between:
• Product & collaboration interview (Meeting the scientists/PM).
• 1:1 with a founder.

CUR8 is an equal-opportunity employer. We welcome applications from people of all backgrounds, identities, and experiences, especially those underrepresented in climate and tech.

Let’s make climate impact inevitable. Join us.