Senior Backend Engineer

Summary

Join Voodoo's Ad-Network Team as a Backend Engineer and lead the design and architecture of backend services powering real-time model inference and bidding decisions for our OpenRTB platform. Collaborate with data scientists and machine learning engineers to deploy, monitor, and optimize ML models influencing real-time bidding. Oversee A/B testing frameworks and ensure seamless integration of experimentation tools. Build high-performance, low-latency, and scalable backend services handling large data volumes. Set best practices for architecture, API design, and distributed systems. Work with cloud infrastructure teams using Kubernetes, Docker, and CI/CD pipelines. Define and implement new features with product managers, optimize performance and cost-efficiency, and continuously monitor system performance. This France-based role offers full remote options.

Requirements

• 5+ years of experience in backend engineering, with a strong focus on designing and building scalable, high-performance systems
• Extensive experience in distributed systems, microservices, and API design using technologies such as Java, Scala, Python, or Go
• Expertise in real-time data processing and event-driven architectures (e.g., Kafka, GCP Pub/Sub, Kinesis) for building responsive, low-latency systems
• Hands-on experience with observability tools (e.g., Prometheus, Grafana, ELK Stack, Datadog) for metrics collection, log aggregation, and system monitoring
• Deep understanding of A/B testing frameworks and experience integrating them into backend systems for experimentation and optimization
• Proven ability to design, build, and manage complex cloud infrastructure (AWS, GCP, Azure), including managing services with Kubernetes, Docker, and cloud-native tools
• Solid experience with CI/CD pipelines, and infrastructure automation tools (e.g., Terraform)
• A focus on building reliable, maintainable, and scalable systems, with experience in performance tuning and cost optimization
• Excellent problem-solving skills, with the ability to tackle complex technical challenges and provide innovative solutions

Responsibilities

• Lead the design and architecture of backend services that power real-time model inference and bidding decisions for our OpenRTB platform
• Collaborate with data scientists and machine learning engineers to deploy, monitor, and optimize ML models that influence real-time bidding strategies, pricing decisions, and targeting
• Oversee the development of A/B testing frameworks and ensure the seamless integration of experimentation tools into our platform for continuous model and bidding optimization
• Ensure that all backend services are high-performance, low-latency, and scalable, capable of handling large data volumes (millions of bidding events per second)
• Set best practices for architecture, API design, and distributed systems to ensure robust and maintainable systems at scale
• Work with the cloud infrastructure teams to ensure efficient deployment, scaling, and monitoring of backend services using Kubernetes, Docker, and CI/CD pipelines
• Work closely with product managers to define and implement new features, optimizations, and improvements to the bidding and model inference system
• Lead efforts to optimize performance and cost-efficiency across the backend infrastructure, ensuring that the system can scale effectively with increasing traffic and data
• Continuously monitor the system’s performance, perform post-deployment analysis, and make improvements based on real-world usage and A/B test results

Preferred Qualifications

• Experience with OpenRTB and real-time bidding systems
• Familiarity with machine learning and deploying models for inference in production.strategies
• Exposure to data science workflows and understanding how data engineers and data scientists collaborate in productionizing ML models
• Contributions to open-source projects or active involvement in technical communities related to backend engineering or machine learning

Benefits

• Competitive salary upon experience
• Comprehensive relocation package (including visa support)
• Swile Lunch voucher
• Gymlib (100% borne by Voodoo)
• Premium healthcare coverage SideCare, for your family is 100% borne by Voodoo
• Child day care facilities (Les Petits Chaperons rouges)
• Wellness activities in our Paris office
• Unlimited vacation policy
• Remote days