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Software Engineer – Python / AI

£65,000–£85,000 + Equity | London (1 day/week)


Did you know that food accounts for roughly a quarter of the UK's greenhouse gas emissions?


Yet measuring its environmental impact can take businesses months of manual work.


This climate-tech startup is using AI to reduce that process from six months to five minutes, helping food businesses move beyond measuring emissions to actually reducing them.


Founded by two Forbes 30 Under 30 entrepreneurs, the company already works with 100+ customers, including GAIL's, Wahaca, 25+ UK universities and UEFA - and now they're looking for software engineer #4 to join the team.


The engineering challenge

You'll build software that processes years of messy purchasing data, identifies and structures product information, and produces accurate carbon assessments in minutes.


The work combines backend engineering, data-intensive systems and production AI, including:


  • LLMs and agentic systems: Develop AI-powered ingestion pipelines, agentic workflows and intelligent data processing to automate complex manual tasks.
  • Backend and data engineering: Design Python services, APIs, relational data models and efficient processing systems capable of handling large, inconsistent datasets.
  • Product engineering: Build carbon calculation engines, reporting dashboards and customer-facing features, taking ownership from initial problem through to production.

Stack: Python, Django/FastAPI, SQL, AWS, React, LLMs and AI-assisted development tools.


Who they're looking for

You'll probably have a few years of commercial software engineering experience, but what you've built and owned matters far more than how long you've been doing it.


They're particularly interested in engineers who:


  • Have owned substantial features or systems in production, making architectural decisions, solving problems independently and taking responsibility for the outcome.
  • Have strong Python fundamentals, including experience designing APIs, working with relational databases and building reliable backend systems.
  • Have built with AI, whether integrating LLMs into products, developing agentic workflows or using AI tools to tackle unfamiliar engineering challenges.
  • Think beyond the code, understanding customer problems, evaluating technical trade-offs and taking features from idea through to production.
  • Care about the mission, with a genuine interest in using technology to help businesses understand and reduce their environmental impact.


You don't need experience in climate tech, deep infrastructure expertise or every technology in the stack. They're looking for someone who's technically capable, curious and comfortable taking ownership in a small team.


What's on offer

  • £65,000 to £85,000 + share options
  • Flexible remote working arrangements, plus you can work from abroad for one month a year!
  • Central London office with gym and refreshments, and a health cash plan.
  • Working with an Oxford/Cambridge-trained team building software that improves our planets environment!


Interested? Get in touch for a confidential conversation. Apply now or email reuben@techmunity.io