Software Engineer, Aether (London)
About Aether
Aether is building a comprehensive AI-driven platform for the built world. Our core software is used by solar , roofing and heat pump companies to deliver advanced 3D modeling, simulation, quoting, and financing tools – all in one powerful interface. We combine deep technical rigor with real-world utility, leveraging physics-based modeling, AI, and scalable infrastructure.
Founded by alumni of UC Berkeley, École Polytechnique, and ETH Zurich, we bring experience from leading energy and software companies.
Aether is a recent graduate of YCombinator, and has raised over $6M in funding.
Check us out: https://www.aethergtm.com
About the Role
We’re looking for an experienced Backend Engineer to take a lead role in developing our core platform. You’ll work closely with the founders and product team to architect and build high-performance APIs, structure complex business logic, and contribute to systems that simulate solar energy, manage 3D projects, and power customer proposals.
This isn’t a feature-factory job – you’ll own major parts of the backend, help shape system design, and solve difficult problems from day one. Ideal candidates are scrappy, fast, and thoughtful: you write elegant code, fix problems at the root, and care about building software that lasts.
Who You Are
You thrive in early-stage, fast-moving environments.
You are technically sharp, deeply curious, and own outcomes.
You know when to ship fast and when to be rigorous.
You love solving real-world problems and optimizing complex systems.
Required Qualifications
3+ years of backend experience in a production environment
Strong proficiency in Python and Django (or equivalent frameworks)
Deep understanding of relational databases and data modeling (PostgreSQL preferred)
Experience building and scaling REST APIs
Familiarity with cloud platforms (GCP preferred), containers, CI/CD
Fluent in English, with excellent written and verbal communication
Nice to Have
We don’t expect you to check every box, but the more of these you bring, the better:
Background in engineering, physics, math, or computational science
Experience with asynchronous tasks (Celery, task queues), Redis, and performance optimization
Familiarity with solar energy systems, CAD/3D modeling, or simulation software
Strong debugging skills and architectural instincts
Comfort working with modern frontend stacks (React/Next.js) or APIs consumed by them
Experience building B2B SaaS tools, quoting systems, or real-time apps
Contributions to infrastructure/DevOps, Pulumi, or observability tools
Why Join Aether
You’ll work directly with experienced founders on ambitious technical challenges
You’ll be part of a mission-driven company shaping the future of energy and the built world
You’ll have autonomy and impact from day one – we ship fast and iterate constantly
London-based office, with flexibility for hybrid/remote if you're a strong independent operator
How to Apply
Send us your resume and a short note about why you're interested. Bonus if you include links to past work (GitHub, portfolio, blog, etc). We move quickly.
