Senior Full-Stack Engineer (User Platform & SaaS Foundations)

Criteo

Criteo

Software Engineering

Bucharest, Romania

Posted on Apr 22, 2026

What You'll Do:

The Experience Enablers Group, within the Platform R&D department, is composed of 4 agile, human-sized teams focused on building scalable SaaS foundations used across all product platforms.

Our mission is to deliver reusable building blocks that power user-centric features such as accounts, team management, communications, notifications, and activity tracking.

As a Senior Full-Stack Engineer, you will play a key role in designing and delivering the core user platform that supports how clients interact with our products.

You will contribute to features spanning:

  • User and account management (including self-registration)

  • Team collaboration and permissions

  • Notifications, emails, and invitations

  • Business activity tracking and logs

  • User preferences and experience optimization

Your Responsibilities

  • Design and build scalable web applications in a fast-paced environment

  • Develop and deliver end-to-end full-stack features (Angular / C#)

  • Collaborate closely with Product Managers, Program Managers, and UX Designers to deliver intuitive and reusable solutions

  • Ensure strong architecture consistency and reusability across multiple platforms

  • Work with cross-functional and international R&D teams, as well as Internal IT, to ensure seamless system integrations

  • Act as a guardian of quality: stability, usability, performance, and continuous delivery

  • Mentor junior engineers and support their growth

  • Promote a strong engineering culture focused on quality, best practices, and continuous improvement

  • Contribute to state-of-the-art engineering practices (testing, CI/CD, frameworks, scalability)

Who You Are:

  • 5+ years of experience building, maintaining, and scaling large web applications

  • Solid experience with backend development (C#, Java, or Python)

  • Strong expertise in front-end development (modern JavaScript frameworks such as Angular)

  • Strong focus on user experience, usability, and accessibility

  • Ability to simplify complex systems and design elegant solutions

  • Curious and proactive about new technologies and best practices

  • Comfortable working in Agile environments

  • Collaborative mindset with a problem-solving and can-do attitude

  • Passion for delivering high-quality, production-ready code

We acknowledge that many candidates may not meet every single role requirement listed above. If your experience looks a little different from our requirements but you believe that you can still bring value to the role, we’d love to see your application!​

Who We Are:

We’re Criteo, the Commerce Intelligence Platform. Criteo helps businesses turn shopper signals into commerce outcomes while delivering more relevant experiences for shoppers. We use proprietary commerce intelligence and AI decisioning to drive relevance for shoppers and performance for businesses.

At Criteo, our culture is as unique as it is diverse. From our offices across the globe or from the comfort of home, our 3,600 Criteos collaborate together to build an open, impactful, and forward-thinking environment.

We foster a workplace where everyone is valued, and employment decisions are based solely on skills, qualifications, and business needs—never on non-job-related factors or legally protected characteristics.

What We Offer:

🏢 Ways of working – Our hybrid model blends home with in-office experiences, making space for both.
📈 Grow with us – Learning, mentorship & career development programs.
💪 Your wellbeing matters – Health benefits, wellness perks & mental health support.
🤝 A team that cares – Diverse, inclusive, and globally connected.
💸 Fair pay & perks – Attractive salary, with performance-based rewards and family-friendly policies, plus the potential for equity depending on role and level.

Additional benefits may vary depending on the country where you work and the nature of your employment with Criteo.