Software Engineer Intern - Backend or Fullstack

Criteo; Paris; Hybrid; EUR 13,000 - 20,000; Part time

Benefits offered by this job

Hybrid work model

Mentorship programs

Career development

Job summary

Criteo is looking for a final-year Software Engineering student for a 6-month internship in Paris. You will contribute to back-end, full-stack, and front-end work, building scalable systems and real-time features with mentorship.

You should have experience in web development, strong object-oriented skills, and excellent communication. The role emphasizes ownership, collaboration, and hands-on learning in a hybrid work setting.

Qualifications

• Final year student in Software Engineering or related field
• Available for 6 months
• Experience developing web-based applications
• Strong ownership and accountability
• Excellent communication and teamwork
• Fluent in English

Responsibilities

• Develop web-based applications as part of a multidisciplinary team
• Contribute to back-end and front-end components
• Work on high-scale, low-latency systems and real-time features
• Collaborate with mentors and participate in knowledge-sharing sessions
• Proactively propose ideas and best practices for production code

Skills

OOP

Team collaboration

English fluency

Problem solving

Education

Pursuing Bachelor's degree in Software Engineering or related field

Tools

TypeScript/JavaScript

C#/.NET

Mesos

Job description

What You'll Do:

The Product Engineering team builds the products that make Criteo tick: from developing industry-leading machine learning techniques to building high scale/low latency real-time applications (over 5M QPS, handling over 300 Bn HTTP requests daily), to delivering first-class client interfaces, both API and UI, with forward-thinking UX at their core, all using state of the art technology.

• Back-end: participate to build large-scale pipelines and systems that make the best decision in a very short time, half a million times per second
• Full stack: MasterTag request production and parsing - Technical stack: a bit of TypeScript/JavaScript, C# (.Net Frmwk, .Net Core), and Mesos
• Front end: Design and implement a component in a web application that will be used to manipulate big JSON markup easily. The goal is to provide a tool to create or change layout banners in a simple and efficient way
• Data quality in the RichTimeline (Remove fraudulent users and identify low-value data)
• In a team of 5-7, you will be working closely with your mentor to drive your project, design, and ensure best practices are applied. You can ask questions and participate in all knowledge-sharing sessions/workshops, etc. You are encouraged to actively voice your ideas whilst learning how to build and ship quality code into production which will likely affect millions of users instantly

Who You Are:

• You are in your final year of study in Software Engineering or a related field and are available for 6 months
• You have experience in developing web-based applications. You occasionally participate in coding competitions
• You are experienced in Object Oriented Programming
• You have a strong sense of ownership and a dislike for passing the buck
• You are a problem solver, a fixer, and a creative technologist. We believe coding is a talent and a passion, not just a skill
• You are a strong communicator and a team player who can work efficiently with others
• You are fluent in English

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.