What You'll Do:

We are a distributed engineering team dedicated to building and maintaining custom programmatic advertising platforms (SSPs/DSPs) for clients across the US, UK, and EU. We focus on real-time bidding, ETL pipelines, and ad delivery using Criteo's u-Platform stack. Our projects enclose a wide range of digital advertising channels, including web, app, CTV, DOOH, and audio.

As a Back-End Engineer at Criteo, you'll create top-tier business products that help our clients maximize publisher revenue, enhance advertiser outcomes, and unlock the true value of their shopper data. While we’re open to candidates with experience in any backend programming language (such as Python, Go, C++, Perl, Ruby Java, Node.js, or similar), a willingness to transition to Lua is essential. For this we provide enough time and the right environment

Main Responsibilities:

• Design and Develop: Build, ship, and maintain real-time services handling 1 million bidding requests per second.
• Prioritize: Balance product and customer priorities with operational and technical needs.
• Ensure Quality: Deliver top-quality code through code reviews, unit tests, integration tests, and end-- to-end tests in a continuous integration environment.
• Collaborate: Work closely with UI and Product teams to deliver services that our customers love.
• Integrate: Perform technical integrations with large international online advertising platforms.
• Enhance Inventory: Enrich advertising inventory with signals from diverse sources such as user interests, web page contextual information, and buying behaviors.
• Innovate: Develop new advertising methods within a Google Privacy Sandbox environment.

Who You Are:

• Educational Background: BS/MS in Software Engineering or a related field.
• 4+ years of software engineering experience, proficient in writing code and unit tests in an Object-Oriented Programming language.
• Experience with any of these languages is a big plus: GO (much desired), C++, Perl, Ruby, Python, Lua, Java, Node JS
• Desire to learn Lua (previous experience is not required, we provide enough time and the right environment)
• Technical Knowledge: Strong understanding of computer science concepts including data structures, algorithms, and optimization.
• Product Focused: Dedicated to creating the best customer experience.
• Language Skills: Proficient English is mandatory, the interview process will mostly be held in English.
• Quality commitment: Strong commitment to quality design, automated testing, and thorough documentation.
• Ownership: A strong sense of ownership with a proactive approach to problem-solving.
• Creative Technologist: A problem solver, fixer, and innovative technologist who sees coding as a talent and passion, not just a skill.
• Team Player: Excellent communicator and efficient collaborator who can work well with others.

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.