Senior Backend Developer

Posted 12 Hours Ago
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Bucharest, București, ROU
In-Office
Senior level
Marketing Tech
The Role
Build and maintain Criteo’s high-throughput, low-latency events ingestion backend. Design scalable, reliable backend features end-to-end with strong testing, observability, and CI/CD. Collaborate with Product, Program, UX, R&D, and IT teams to deliver reusable components and robust integrations. Contribute to web applications and AI-assisted configuration, validation, and troubleshooting flows while promoting engineering quality and continuous delivery.
Summary Generated by Built In

What You'll Do:

What's the Core Product Component group?
The Core Product Component group, composed of seven agile and human-sized teams that deliver reusable business components that power and accelerate Criteo’s product solutions, ensuring consistency, reliability, and speed across the platform.
 

How You'll Make An Impact
As a Software Engineer in the Commerce Properties team at Criteo, you’ll shape how companies integrate their e‑commerce properties (e.g., tracking events) with Criteo. You’ll evolve our real‑time events ingestion back‑end with a focus on scalability, low latency, and reliability, and you’ll help imagine, design, and implement user flows that reduce client integration time by leveraging AI for guided setup, auto‑validation, and just‑in‑time assistance.
 

What You’ll Do

  • Build new capabilities and maintain our high‑throughput events collection back‑end, one of Criteo’s largest data pipelines by volume.

  • Partner with Product and Program to deliver fit‑for‑purpose architecture and reusable components across platforms.

  • Design, implement, and ship back‑end features end‑to‑end with strong testing and observability.

  • Help build web applications when needed, including AI‑assisted flows for configuration, validation, and troubleshooting.

  • Collaborate with multi‑cultural R&D teams and Internal IT to ensure robust integrations between client‑facing apps and Criteo systems.

  • Own stability, usability, and continuous delivery, raising the bar on reliability and developer experience.

  • Promote a strong engineering culture focused on quality, testing, and modern CI/CD; bring insights from meetups and conferences to keep our stack state‑of‑the‑art.

Technical environment: C#, Java, Scala, Angular, TypeScript

Who You Are:

  • You have experience building, maintaining, and evolving large‑scale applications.

  • You care deeply about high‑throughput systems and prioritize reliability, performance, and scalability in your work.

  • You’re skilled at making complex problems simple and solvable.

  • You stay curious about new technologies and adopt proven design and engineering best practices.

  • You bring a can‑do, collaborative mindset and approach problems with positivity and ownership.

  • You have experience in Agile teams and are passionate about shipping high‑quality, well‑tested code.

Bonus

  • You have experience in full‑stack development with modern JavaScript and in building web services in C#, Java, or Python.

  • You contribute to Product and UX discussions, turning customer needs into simple, intuitive solutions, and you apply AI where it clearly improves outcomes.

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.  

Skills Required

  • Experience building, maintaining, and evolving large-scale applications
  • Experience working with high-throughput systems and prioritizing reliability, performance, and scalability
  • Experience working in Agile teams
  • Passion for shipping high-quality, well-tested code
  • Experience with C#, Java, Scala, Angular, or TypeScript
  • Full-stack development experience with modern JavaScript
  • Experience building web services in C#, Java, or Python
  • Experience contributing to Product and UX discussions and applying AI to improve outcomes

Criteo Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Criteo and has not been reviewed or approved by Criteo.

  • Healthcare Strength — Health insurance and wellness/mental-health support are described as strong parts of the package, with high reported satisfaction for medical, dental, and vision coverage. Feedback suggests these offerings contribute meaningfully to overall benefits satisfaction.
  • Retirement Support — A 401(k) with company match is highlighted positively, with mentions of a 3%–5% match being common in recent reports. Feedback suggests the retirement program is a valued component of total rewards.
  • Leave & Time Off Breadth — Paid vacation, volunteer time off, and additional summer days are emphasized, and time flexibility is repeatedly praised. Feedback suggests this breadth supports work-life balance perceptions.

Criteo Insights

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The Company
HQ: Paris
2,868 Employees
Year Founded: 2005

What We Do

Criteo is a global technology company that powers the world’s marketers and media owners with trusted and impactful advertising through our world-leading Commerce Media Platform, a suite of products that activates the world’s largest set of commerce data to drive better commerce outcomes. We help thousands of brands, publishers, and retailers reach and monetize audiences and are committed to supporting a fair and open internet that enables discovery, innovation, and choice.

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