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Senior Back-end Engineer Node.Js - Wizz

Voodoo
Paris (75)

Soumettre votre candidature

Détails de l'emploi

Temps plein

Qualifications

Français
Node.js
DevOps
Firebase
iOS
MongoDB
Docker
Systèmes distribués
Terraform
GitHub
APIs
S3

Description complète du poste

About Voodoo

Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz.

Team

Our Consumer Apps teams are at the forefront of crafting innovative and engaging apps for daily enjoyment.

Our ambition extends beyond gaming to entertain a global audience. Millions of people around the world, especially in the US, download and use the apps we create.

You'll be working on Wizz, a social app specifically designed for teens, boasting over 3 million monthly active users in the US and UK. Wizz is a friend-finding and chat app where young people can safely express themselves and connect with like-minded peers in an authentic, pressure-free environment. Unlike other social media platforms that focus on followers, posts, or passive consumption, Wizz offers young people a space to have meaningful 1:1 conversations with peers.

As a member of a high-performing team of 20, you'll collaborate to further scale and enhance Wizz, fostering a spirit of goodwill and creativity. As Wizz continues its dynamic growth and development, we are seeking an ambitious Senior Backend Engineer to join.

Role

We are looking for :

A Senior 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:

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 our 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
Be 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

Voodoo just won the award for Best Office Space in France

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