Senior Fullstack Software Engineer

What You'll Do:

🚀 Join Criteo as a Full Stack Software Engineer

At Criteo, we’re looking for Full Stack Software Engineers to join our Product Engineering team in our amazing Bucharest office (Piata Romana).

Are you passionate about building applications that make life easier for both developers and end users? Do you thrive in collaborative environments and enjoy tackling complex technical challenges? If so, you might be exactly who we’re looking for to help shape the future of our APIs.

💡 What You’ll Do

Partner closely with Product teams, R&D colleagues, and our API Guild to design impactful, scalable APIs

Collaborate with UI/UX experts to create intuitive and accessible user experiences

Build and test reliable applications using unit, integration, and end-to-end testing

Participate in code reviews to ensure high-quality, maintainable solutions

Work within multicultural R&D teams to connect client-facing applications with the broader Criteo ecosystem

Contribute to continuous deployment to keep our systems agile and responsive

Bring in fresh ideas from meetups, conferences, and personal learning to improve our frameworks, testing practices, and CI/CD pipelines

🛠️ Our Tech Stack

Back-end: C# / ASP.NET Core

Front-end: Angular

🌍 Why Join Us?

A collaborative, inclusive, and international work environment

A global R&D community of 1000+ passionate engineers

High-impact projects at the heart of innovation in AdTech

A culture that values continuous learning, knowledge sharing, and growth

Curious about our R&D team? Let's have a look at our R&D blog on Medium

Who You Are:

You believe APIs are the backbone of modern technology.

You care deeply about Developer Experience and want your work to empower other developers.

You have at least 5 years of experience working on large, complex systems.

You’re skilled in Object-Oriented Programming (C#, Python, C++, Java) with strong backend experience and some front-end development experience with JavaScript, Angular, or React.

You love reusability and enjoy making complex things simple.

You’re curious about new technologies and may even explore them through personal projects.

You bring a positive, collaborative mindset and a “can-do” attitude to challenges.

You thrive in Agile environments and are passionate about delivering high-quality 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.