Senior Fullstack Software Engineer

Mission

At Vizzia, we are building a platform capable of deploying and operating multiple independent SaaS environments at scale.

Your mission is to design and deliver a scalable multi-SaaS cloud architecture and media infrastructure that allows Vizzia to deploy, operate, and scale independent SaaS platforms reliably and efficiently.

You will work at the core of our platform: multi-tenant architecture, deployment infrastructure, identity management, and media processing systems.

Beyond development, you will play a key role in raising the engineering bar of the team, shaping architectural decisions, and helping build a platform that can support Vizzia's rapid growth.

Responsabilités

• Design and maintain a scalable multi-SaaS architecture enabling the deployment of isolated SaaS environments.
• Build infrastructure that allows teams to automatically deploy new environments (Dev, Staging, Production, Demo).
• Develop and maintain backend services in TypeScript / Node.js.
• Design and operate scalable cloud infrastructure on AWS with strong reliability and security standards.
• Build and improve CI/CD pipelines, infrastructure automation, and monitoring systems.
• Implement a centralized identity and access management layer (SSO) across SaaS platforms.
• Design and maintain cross-platform role and permission management systems.
• Contribute to distributed systems capable of handling high workloads, including media pipelines and encoding jobs.
• Maintain high engineering standards through strong testing practices, documentation, and technical debt reduction.
• Contribute to the architecture of modular and configurable platform components supporting country-specific configurations.
• Provide technical leadership within the engineering team, guiding architecture decisions and mentoring engineers.
• Use AI-assisted development tools (such as Claude Code or Cursor) to improve development velocity and engineering workflows.

Your Profile

• Strong experience in backend engineering (TypeScript / Node.js) and building reliable services.
• Proven experience designing cloud architectures on AWS.
• Experience building or operating multi-tenant / multi-SaaS platforms.
• Solid understanding of distributed systems and scalability challenges.
• Comfortable working with DevOps practices, CI/CD pipelines, and infrastructure automation.
• Experience with test-driven approaches (TDD / BDD) and functional testing frameworks such as Cucumber.
• Comfortable contributing to multi-language environments (TypeScript, Rust, Go, C or similar).
• Ability to provide technical leadership, mentor engineers, and guide architectural decisions.
• Strong engineering discipline with attention to code quality, testing, and maintainability.
• Interest in AI-assisted development ecosystems and modern engineering workflows.
• English professional proficiency

Hiring Process

• Recruiter interview
• Hiring Manager interview
• Technical and Product interview
• CTO Interview

Benefits 🏡 Hybrid work

🏝 "Contrat cadre" and RTT (between 8-12 per year depending on the number of public holidays in the current year)

💻 A Mac or PC depending on your preferences

💸 BSPCE

🍜 60% coverage of meal vouchers worth €9 per worked day

🚃/🚲 Sustainable mobility allowance

🏥 Mutuelle (Alan)

💼 Offices located in central Paris (9th arrondissement)

☀️ Annual offsite with the whole team and plenty of company events