Senior Backend Software Engineer

About Vibe

is a fast‑growing streaming TV advertising platform that helps brands reach audiences through hyper‑targeted audience segmentation, AI insights, and real‑time campaign optimization.

You’ll join the Performance team that owns advertiser outcomes ding, pacing, and the prediction stack that drives both. You’ll report to Clément Schiano, Engineering Manager for Performance.

• Own the pacer and bidder
  • Go deep on the bidder and pacer stack, map it end‑to‑end and identify at least one fragility to own on day one.
  • Propose improvements to the bidder or pacer autonomously from problem definition through design proposal.
  • Ship measurable improvements to CPx, pacing accuracy, or win rate within your first three months.
• Raise the team’s ceiling
  • Distribute critical system knowledge: make the team faster and less dependent on any single person.
  • Challenge existing designs, including inherited ones, and push for cleaner solutions.
  • Deepen expertise in theoretical foundations (probabilistic modelling, PID control theory) powering our approaches.
• Move at Vibe pace
  • Use AI tooling as a genuine force multiplier.
  • Iterate in production, not in your head. Ship, measure and adjust.

• Shipped backend systems in a strongly typed language (C++, Rust, Go, Scala, Java, or equivalent) at production scale.
• Debugged distributed systems under real traffic: latency issues, consistency failures, the works.
• Worked inside a DSP, SSP, or bidder: you understand auction mechanics from the inside.
• Built or tuned pacing algorithms or PID controllers theory and implementation, not just awareness.
• Solid grounding in probabilistic reasoning and statistical modelling you think in distributions, not just averages.

• Experience in a scale‑up environment: you know what fast and resource‑constrained actually feels like.
• ML systems in production: feature pipelines, model serving, not just training notebooks.
• Real‑time data pipelines and low‑latency architectures at scale.
• Redis, Kafka, or equivalent under meaningful load.

At Vibe, we run on three values:
Impact
, Ambition
, and Urgency
. We tie every goal to a real business outcome, think 10x rather than settling for good enough, and move daily rather than waiting for perfect conditions.

• Equity — Employee Stock Ownership Plan. You’re building this; you should own part of it.
• Variable pay — based on objectives you hit. No arbitrary targets.
• Hybrid flexibility — We’re in the heart of Paris and our team is in 3x a week.
• Health insurance — Full coverage via Alan.
• Meal vouchers — Via Swile.
• Annual offsite — The whole team, once a year, somewhere worth the trip.
• Tech Syncs — Engineering and Product meet in person at least quarterly, worldwide.

Vibe is an equal opportunity employer. We evaluate all applicants without regard to race, color, religion, national origin, gender, gender identity or expression, sexual orientation, age, disability, veteran status, or any other characteristic protected by law.

We believe the best ideas come from teams with different backgrounds, perspectives, and experiences. If you need a reasonable accommodation during the application or interview process, please let us know.