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Senior Backend Software Engineer

Vizzia· Engineering
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Hybrid (Paris)€65k - €75kFull-timePosted 1w ago

About the role

Senior backend role leading the backend for Vizzia's Safety and video surveillance products, spanning edge and cloud, with ownership of significant backend work, architecture, and delivery across edge devices and SaaS, in a hybrid Paris-based environment.

Responsibilities

  • Build and operate the services running on the field units: camera communication (VAPIX, ISAPI, ONVIF), NX Witness integration, local SQLite storage.
  • Optimise CPU and RAM on units with limited resources, and minimise the 4G/5G bandwidth of the video chain without degrading the user experience.
  • Debug a unit in production: SSH, logs, incident triage across the fleet.
  • Design and operate the Hono APIs, the event-driven workers on the LavinMQ bus, and the Postgres/Drizzle data layer.
  • Drive the fleet from the cloud, orchestrate processing, and guarantee resynchronisation after a network outage with no data loss.
  • Deploy and operate: GitHub Actions, Helm, GKE, Datadog monitoring and alerting.
  • Co-own both projects from technical spec through to production, working with the PM and legal constraints: evidential integrity, audit trail, retention and purge, GDPR.
  • Architect the shared ingestion and edge to cloud layer that both products converge on.
  • Be one of the two backend leads on production incidents, able to handle an edge or cloud incident on your own.
  • Write ADRs, ship modules tested, harden critical parts, and rely on CI to catch regressions.
  • Keep to the monorepo conventions: moon, bun, ten bounded contexts.

Qualifications

  • 4 to 8 years of backend experience, a significant part of it in SaaS.
  • TypeScript/Node in production, operational from day one.
  • Experience building and operating event-driven distributed systems in production: message buses, workers, idempotency, retries, with structured logging, monitoring and incidents.
  • An engineering degree or a master's.
  • French and English full working proficiency
  • Curiosity about systems, networks and protocols; experience with camera protocols or unit crashes is a plus.
  • AI coding tools are part of how you work, and quality holds up.

Skills

Required:Backend development (TypeScript/Node)Event-driven distributed systemsCloud and edge architectures

Benefits

  • 💶 65–75K€ fixed + bonus
  • 🏡 Hybrid work
  • 🏝 Contrat cadre and RTT (between 8 and 12 days per year depending on public holidays)
  • 💻 Work Macbook
  • 💸 BSPCE
  • 🍜 60% coverage of meal vouchers worth €9 per worked day
  • 🚃/🚲 Sustainable mobility allowance
  • 🏥 Mutuelle (Alan)
  • 💼 Offices located in central Paris (9th arrondissement)
  • ☀️ Annual offsite with the whole team and plenty of company events
Last updated Oct 14, 2026. Interested? Apply on the company site.

About Vizzia

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