Senior Full-Stack Product Engineer

Location: Berlin, on-site | Type: Full time, permanent | Reports to: CTO | Range: €65,000–125,000 depending on level | Language: English

Spine builds sensor towers and the software that let operators of critical infrastructure see what's happening on their sites: substations, gas facilities, solar parks, logistics hubs. The hardware detects. The platform correlates and tells one person in a control room the one thing worth their attention.

That person sees the operator console, and that is what you'd own. It's a live map of the site with tracks moving across it, alarms an operator acknowledges and resolves, camera feeds from the towers, and an evidence export for when something actually happened. It's used during live incidents, so it has to be fast, clear and impossible to misread.

The unusual part is where it runs. Our backend sits on the towers and inside customer networks rather than in a cloud we control, and sometimes those networks are offline. One tower works well today. Next comes a single view across a whole multi-tower site.

What You'll Own

• The console, end to end. From the services that take in fused sensor data to the real-time React/TypeScript frontend operators watch.
• Real-time delivery. Live tracks, alarms and video over WebSockets or event streams, kept smooth on real site networks.
• The multi-site view. One URL for a customer that shows the whole site, and keeps working when a tower drops out.
• Product decisions. There is no design team. You take a rough operator need, talk to field engineers and customers, make the call and ship it.

What We're Looking For

• You've shipped a real-time web product end to end, from backend to the screen a user acts on.
• You're strong in React/TypeScript and in at least one backend language (Python, Rust, TypeScript or similar). We care more about how you build than which language.
• You make good product calls on your own and can explain them.

Nice to Have

• Message buses or gRPC/ZeroMQ-style feeds
• Software that runs on-prem or on edge devices rather than in the cloud

Why Spine

• You'd own the product people actually look at, working directly with the CTO.
• Real hardware, deployed at live critical infrastructure sites.
• A young, VC-backed company, with an employee equity participation programme.
• We're open on seniority: the range above reflects that, and we'll level the role to the person.

How We Hire

An intro call, then a take-home challenge on a real problem. It's open-ended on purpose: we care about your reasoning, not polish. You present it to us and we decide quickly after that.