Freelance Senior Back-end Engineer Node.Js - Wizz

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Freelance Senior Back-end Engineer Node.Js - Wizz, Paris

Client:

Location:

Paris, France

Job Category:

Other

EU work permit required:

Yes

Job Reference:

ed07f893cd24

Job Views:

2

Posted:

25.04.2025

Expiry Date:

09.06.2025

Job Description:

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.

As a member of a high-performing team of 15, 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.

Define and promote best practices in reliability, observability, and infrastructure management.

Contribute to backend infrastructure evolution, ensuring that it supports rapid product iterations and growth.

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
• 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)
• 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

Voodoo just won the award for Best Office Space in France