Software Engineer, Back-End

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.

• 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., * 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

• 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

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