Software Engineer Intern - Front-End or Fullstack

Criteo; Paris; Hybrid; EUR 10,000 - 17,000; Full time

Benefits offered by this job

Hybrid work model

Mentorship program

Health benefits

Wellness perks

Equity opportunities

Job summary

Criteo, the Commerce Intelligence Platform, is hiring a Software Engineer intern for a 6‑month program. You’ll work in a top-class software engineering team, choosing projects in front-end or full-stack areas.

The role offers close mentorship, knowledge sharing, and real-world production impact on millions of users. You’ll collaborate with product, UX, and R&D to design, implement, and roll out features, using a mix of TypeScript/JavaScript, C#, .NET, and APIs.

Qualifications

• Final year student in Software Engineering or related field.
• Experience in developing web-based applications.
• Proficiency in Object Oriented Programming and at least one of the following languages: .NET, C#, Typescript, Angular, Javascript, GraphQL.
• Fluent in English.

Responsibilities

• Design and implement web components or API visualizations to improve performance or usability.
• Collaborate with product/UX/R&D to define and develop new features.
• Lead the development of features end-to-end with team support and production rollout.
• Participate in knowledge sharing sessions and code reviews.
• Contribute to the MasterTag production and parsing tasks as needed.

Skills

Object Oriented Programming

.NET

C#

Typescript

Angular

Javascript

GraphQL

English fluency

Team collaboration

Education

Final year student in Software Engineering or related field

Tools

Mesos

Job description

What You'll Do:

CRITEO is looking for an Software Engineer intern for 6 months! Eager to practice what you've learnt and to grow as a Software Engineer? Join our top-class software engineering teams and choose your project:

According to your choice, skills and interest, you can tackle one of the following subjects:

Front-end:

- Design and implement a component in a web application that will be used to improve the performance/monitoring (loading time) of the Shell and satellite applications in CGrowth OR :

- Help API developers (EXAM developer, API Guild APIDX Team) to visualize the external Criteo API to improve its consistency.

Full stack:

- You will participate to build the specification with product, UX and R&D teams. You will fully handle the development of the feature with the support of the rest of the team and follow it up to the progressive roll-out in production. A topic could be the addition of a new way of segmenting users: from the API (internal and external) to the UI.

- MasterTag request production and parsing - Technical stack: a bit of TypeScript/JavaScript, C# (.Net Frmwk, .Net Core) and Mesos.

In a team of 7-10, 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.

What is it like to work in our R&D:

• Most of all, we are creators. From designing ground-breaking products to finding unique ways to solve technical challenges at an exceptional scale, our tech teams work with state-of-the-art methodologies to shape the future of advertising.
• 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.

Who You Are:

• You are in your final year of study in Software Engineering or related field
• You have experience in developing web-based applications. You occasionally participate in coding competitions.
• You are experienced in Object Oriented Programming and at least one of those following languages : .NET, C#, Typescript, Angular, Javascript, GraphQL,
• 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.