Senior Full Stack Engineer

Location: Paris or 100% Remote Work [2 days a month in Paris]

Salary: €60,000 - €80,000 gross per year  (English proficiency required)

Why is this opportunity unique for a Senior Engineer?

• Architect & Build Core Foundations: Take a leading role in designing and developing essential SaaS frameworks (data views, statuses, email campaigns, notification center, settings, DB monitoring) that require deep technical thought and will underpin future product development.

• Implement Cutting-Edge AI: Dive deep into integrating AI into our key features (AI-assisted newsletter creation, intelligent search, social recommendations, etc.), solving challenging technical problems related to LLM integration and performance.

• Shape AI Engineering Practices: Contribute your expertise to defining and implementing best practices for LLM engineering (e.g., Test-Driven AI coding, prompt engineering standards, framework evaluation), influencing how we build with AI.

• Deliver Complex SaaS Projects: Own the technical design and implementation of major features like email sequence management, advanced notification systems, audience management, and complex analytical dashboards, ensuring high performance and reliability (99.9% SLA).

• Solve Tough Modernization Challenges: Apply your deep technical skills to refactor legacy components (Sharepoint SPFX) effectively and contribute significantly to the overall robustness and architectural integrity of the platform.

Your Main Responsibilities:

• Design, develop, test, deploy, and maintain complex features and core systems for the Mozzaik platform.

• Contribute significantly to the technical architecture and design decisions for new features and platform improvements.

• Write high-quality, maintainable, and well-tested code.

• Ensure the performance, scalability, and reliability of the systems you build (contributing to the 99.9% SLA target).

• Actively promote and implement engineering best practices within the team (testing, CI/CD, monitoring, documentation).

• Explore, prototype, and integrate AI-based solutions, tackling the associated technical challenges.

• Actively participate in engineering team life: knowledge sharing, insightful code reviews, technical discussions, and continuous improvement initiatives.

• Potentially provide technical guidance and mentorship to more junior engineers.

Our Tech Stack

• Languages & Frameworks
  TypeScript, React, Bun,

• Infrastructure & Cloud
  Azure (App Services, Functions, SQL Database, Service Bus…)
  Infrastructure as Code with Terraform

• Testing
  Vite, Jest / Vitest, React Testing Library, Playwright

• CI/CD & Tooling
  GitHub-centric workflows (CI/CD pipelines, code reviews, automation)

What We Offer

• Attractive Compensation: Fixed salary between €60k and €80k per year, depending on profile and experience.

• Exceptional Flexibility: Choose how you work Either hybrid in Paris (2 days remote work/week in our superb offices near St Lazare), or 100% Remote Work from France (several team members are already full remote). Plus 2 weeks of "Work from Anywhere" per year.

• Technical Impact and Autonomy: A key role with significant technical ownership and the autonomy to tackle complex problems and influence the technology direction in a growing company.

• Professional Development: A structured onboarding process, continuous training opportunities, and the chance to work deeply with cutting-edge technologies (AI).

• Strong Company Culture: Join a caring, transparent, and committed team where mutual support, technical excellence, and collaboration go hand in hand.

• Modern Work Tools: MacBook Pro or Dell, quality equipment provided to work in the best conditions.

• Social Benefits: Alan company health insurance, Swile Restaurant Vouchers, transport reimbursement, frequent team events (afterworks, seminars, etc.).