Software Engineer (London, United Kingdom)

Software Engineer

Company Overview

AlliedOffsets has a unique mission: combine technology, data, and finance to bring radical transparency to carbon offsetting. We do this by creating innovative data products that help to improve transparency in the market. With 30,000+ projects in our database including details about the project, carbon credits, buyers, retirements, news, brokers, resellers, prices, forward curves and much more. Our current clients include corporations, financial institutions, brokers, academia, consulting firms, public sector entities, and research organizations.

Carbon offsetting is becoming increasingly popular as companies and individuals around the world take a more active role in mitigating climate change. However, the market is very fragmented with (until now) no central registry for all the projects, making it difficult to know what the projects are, and how they compare with others. Our database allows a wide variety of industry actors to access information on projects across all registries, in order to make the market more transparent and available to all.

Job Summary

This is an exciting opportunity for a Software Engineer to join a fast-growing company at the intersection of technology, finance, and sustainability. You’ll play a key role in developing and maintaining the systems that power our global carbon markets data platform. As a Software Engineer, you’ll work on data-intensive backend applications, APIs, and infrastructure that support our analytics tools and external clients. You’ll have considerable ownership over your work and the opportunity to influence both technical direction and product development as we continue to scale. This is a hands-on role suited to someone who enjoys building robust systems, working with complex datasets, and contributing to meaningful climate-focused technology. We’re looking for someone who takes ownership, solves problems thoughtfully, and thrives in a collaborative environment.

Key Responsibilities

• Designing and developing backend systems and APIs that power our data platform
• Building and extending data engineering pipelines that process complex carbon market datasets
• Developing and maintaining infrastructure to securely serve data to external clients
• Working with relational databases (e.g. PostgreSQL) to optimize performance and scalability
• Contributing to full-stack development where needed, including internal tools and client-facing applications
• Collaborating with data scientists and analysts to translate requirements into technical solutions
• Writing clean, well-tested, and well-documented code
• Supporting deployment processes and contributing to cloud infrastructure management

Requirements / Qualifications

• Strong experience with Python, ideally 2-3 years (OOP knowledge is a bonus)
• Demonstrable experience working in climate, sustainability, environmental data, or a strong, evidenced interest in the voluntary carbon markets
• 2+ years of experience building and deploying REST APIs (Flask, FastAPI), including endpoint design, authentication, database integration, and cloud deployment.
• 1+ years of hands-on experience with relational databases, including writing and optimizing complex SQL queries (PostgreSQL preferred)
• Experience handling and processing complex datasets
• Familiarity with at least one modern cloud platform (AWS preferred)
• DevOps experience and understanding of deployment workflows
• Strong security awareness when handling sensitive data
• Experience with data analysis libraries such as pandas, numpy, or similar
• 2+ years of experience using Git for version control in collaborative development environments.
• Ability to communicate effectively with both technical and non-technical stakeholders

Location

Office in central London location, Remote: False

Employment Type

Full Time

Salary & Benefits

• Hybrid Work Schedule
• Considerable autonomy
• Work for a purpose-driven company knowing your efforts are helping to mitigate the effects of climate change and build a better world for future generations
• Work in a collaborative environment with motivated, purpose-driven colleagues
• Regular social events
• Unlimited Holiday Allowance
• Annual Company Retreat
• Company Laptop
• Free Lunch Fridays
• Summer Fridays

Application Process

To apply, please send your CV and two paragraphs outlining your qualifications and why you’d like to join our team to [email protected]. We’d love to hear your voice in the cover letter, so please avoid using AI tools to write it. A short, thoughtful note about why this role excites you is more valuable to us than something overly polished.

Equal Opportunity Statement

AlliedOffsets strives to be a diverse and inclusive place where we can ALL be ourselves. No matter the visible or invisible differences, we have long been committed to fostering an environment where everyone has an equal opportunity to reach their full potential, be heard and valued. While diversity and inclusion has long been a business priority, we know we have significant work to do and are accelerating our commitment in our workplace and community. With that said, we particularly encourage applications from people who identify as Black, Asian, or from a Minority Ethnic background.