Backend Engineer

We're hiring a Backend Engineer who wants to own services that a Swedish household actually depends on.

Elvy helps Swedish households produce, store and use their own renewable energy. Solar, batteries, heat pumps and electricity retail, all from one partner. Our backend is the nervous system that connects sales, installation, inverter telemetry, grid data, billing and the customer app.

What you'll do

• Design and ship services that run critical customer-facing flows (contracts, installations, billing, energy optimisation).

• Integrate with inverter APIs, grid data, and external providers like Scayl and WayToBill.

• Keep the platform boring. Boring is good. Boring means the installer sees the right data on-site and the customer sees the right kWh on their bill.

• Mentor without gatekeeping. Review code in a way you'd want your code reviewed.

Who you are

Strong on fundamentals. Data modelling, HTTP, queues, consistency trade-offs. You pick the right tool, not the trending one.

Production-minded. You think about what breaks at 3am before you think about what looks nice in a demo.

Direct. You tell the PM the feature is 80% complex for 20% value. Then you help find the 20%.

Swedish or English. We code in English, our customers are Swedish, and you only need the first.

Current stack:
Frontend: React app in JS/TS, built on Panda CSS (sadly) and TanStack, deployed on Vercel.
Backend: FastAPI in Python, containerized with Docker and deployed on GCP.
Claude is doing alot of things to.

Practical information

• Location: Elvy HQ, hybrid (2-3 days in office)

• Employment: Full-time, permanent

• Compensation: Market rate for the role and experience, we share the range at first call

• Start: Flexible

• Stack: TypeScript, Python where it makes sense, PostgreSQL, AWS

Don't match everything? Apply anyway. We care more about how you think than which framework is on your CV.

Own the services that a family in Växjö relies on to make sense of their energy bill.