Backend Software Engineer
€75,000 / yr base salary
Posted 9 Oct 2026
Advertised as “Senior Backend Software Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 4–8 yrs
- Management level
- Individual contributor
- Employment
- Hybrid
- Contract
- Full-time
| Base salary | €75,000 / yr |
|---|
Study levelBachelor's or higher
Context
Two video surveillance products are entering development at Vizzia: video-based traffic enforcement, with a first deployment in the UK, and ANPR, automatic number plate recognition run on legal request. Both rely on the same technical chain: camera-equipped units in the field, an edge to cloud pipeline, and a SaaS that officers use every day. That chain has to be built.
Vizzia equips more than 250 local authorities for waste management today. Safety is the company's second product line, and it comes with its own constraints: data hosted in France on SecNumCloud infrastructure, evidential integrity, end to end traceability.
The team is small and senior. You will join Jérémy Fornarino, Tech Lead, as the second backend engineer on Safety. Your mission: take ownership of a significant share of the backend for both products, across the full edge and cloud spectrum, and raise the team's quality bar alongside him.
What You'll Do
1. The edge backend
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Build and operate the services running on the field units: camera communication (VAPIX, ISAPI, ONVIF), NX Witness integration, local SQLite storage.
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Optimise CPU and RAM on units with limited resources, and minimise the 4G/5G bandwidth of the video chain without degrading the user experience.
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Debug a unit in production: SSH, logs, incident triage across the fleet.
2. The cloud backend
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Design and operate the Hono APIs, the event-driven workers on the LavinMQ bus, and the Postgres/Drizzle data layer.
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Drive the fleet from the cloud, orchestrate processing, and guarantee resynchronisation after a network outage with no data loss.
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Deploy and operate: GitHub Actions, Helm, GKE, Datadog monitoring and alerting.
3. Ship enforcement and ANPR to production
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Co-own both projects from technical spec through to production, working with the PM and the legal constraints of the domain: evidential integrity, audit trail, retention and purge, GDPR.
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Architect the shared ingestion and edge to cloud layer that both products converge on.
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Be one of the two backend leads on production incidents, able to handle an edge or cloud incident on your own.
4. Architecture and quality
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Write your own ADRs, challenge Jérémy's, and be challenged in return.