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Senior Backend Software Engineer – Performance
Location
France
Posted
54 days ago
Salary
0
Seniority
Senior
Job Description
Senior Backend Software Engineer – Performance
Vibe.co
• Own the pacer and bidder • Go deep on the bidder and pacer stack map it end-to-end and identify at least one fragility worth owning on day one • Propose improvements to the bidder or pacer autonomously from problem definition through to 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 the theoretical foundations (probabilistic modelling, PID control theory) powering our approaches • Move at Vibe pace • Use AI tooling as a genuine force multiplier (not a crutch, not a checkbox) • Iterate in production, not in your head, we - ship, measure and adjust
Job Requirements
- 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
Benefits
- 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.
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