Chapter lead Back-end Engineer Node.Js - Wizz

Role

We are looking for :

• A Chapter Lead Backend Engineer who is not only technically strong but also eager to contribute to the product vision and actively participate in decision‑making.
• You won’t just be writing code, you’ll have a key role in shaping the architecture, scalability, and long‑term strategy of Wizz.
• Your ability to think beyond execution and take ownership will be crucial: we want someone who is proactive, challenges assumptions, and collaborates with product and engineering teams to create a robust, scalable, and innovative platform.

Your mission:

• Lead the backend team at Wizz of 4 Senior Backend Engineers, be responsible for the strategy.
• Own the backend architecture, ensuring scalability, performance, and reliability for millions of users.
• Collaborate closely with product teams to shape and influence product decisions with a strong technical perspective.
• Design, implement, deploy, and maintain highly scalable and available backend systems, including features that enhance user safety and content moderation.
• Integrate and manage third‑party services (e.g., analytics, moderation, cloud tools) to ensure a secure and seamless user experience.
• Define and promote best practices in reliability, observability, and infrastructure management.
• Contribute to backend infrastructure evolution, ensuring that it supports rapid product iterations, responsible growth, and a safe environment for users.
• Improve system performance and scalability, particularly around high‑traffic distributed systems.

Our stack

• Language and libraries: Node.js, Fastify, Socket.io, Go, Firebase
• Databases: MongoDB, Redis
• Infrastructure: Cloud Run, Pub/Sub, S3, CloudFront, Big Query
• Ops: Github Action, AWS CLI, gcloud CLI, Docker, microservice architecture
• iOS: XCode, GitHub, Cocoapods (public and private)

Profile

• Passion for the mobile consumer industry
• Fluent in French
• Excellent back‑end programming skills (5+ years experience)
• Interest in Node.JS (vanilla)
• Professional GCP or AWS expertise
• Experience building APIs
• Experience with high traffic and distributed systems architectures
• Familiarity with services & technologies used in our stack
• Track record with a social media application is a plus
• DevOps skills (Terraform, Cloud formation, ...), are a plus

Benefits

• Competitive salary upon experience
• Swile Lunch voucher
• Gymlib (100% borne by Voodoo)
• Premium healthcare coverage SideCare, for your family 100% borne by Voodoo
• Wellness activities in our Paris office
• Unlimited vacation policy
• Remote days on Mondays, Tuesdays and Fridays