Backend Engineer, Device Telemetry
About the role
Around eighteen thousand inverters and meters report to us every few minutes over connections that range from decent 4G to a rural link that works only at night. Your job is to make the numbers we show a customer trustworthy despite that.
The actual engineering problem
Readings arrive late, arrive twice, arrive out of order, or arrive with a clock that is three hours wrong because the device rebooted. A naive sum over that data produces a savings figure that is confidently incorrect, and a customer who stops trusting the product.
You will work on the ingestion pipeline, the deduplication and gap-filling logic, and the aggregation layer that produces daily and monthly figures. You will also build the alerting that tells a field engineer a panel string has failed rather than waiting for the customer to notice.
What we look for
Three to six years of backend engineering. Time-series or IoT experience is welcome but not required; what matters is that you think carefully about correctness with unreliable inputs and that you are comfortable with a database beyond simple CRUD.
Responsibilities
- Own the telemetry ingestion and aggregation pipeline
- Design deduplication, ordering and gap-filling logic
- Build fault detection and field-engineer alerting
- Keep query performance sane as the device fleet grows
- Work with the hardware team on the device protocol
Requirements
- 3-6 years of backend engineering experience
- Strong database skills, including time-series or heavy aggregation work
- Experience with message queues or streaming ingestion
- Careful about correctness with untrusted, unreliable input
- Comfortable with Python or Node.js
Skills
Benefits
- Work with real hardware and visible physical impact
- Health insurance for you and immediate family
- Five-day week with flexible start times
- Site visits to installations if you want them
