Senior Software Engineer - AI Applications

Ubisoft’s 19,000 team members, working across more than 30 countries around the world, are bound by a common mission to enrich players’ lives with original and memorable gaming experiences. Their dedication and talent have brought to life many acclaimed franchises such as Assassin’s Creed, Far Cry, Watch Dogs, Just Dance, Rainbow Six, and many more to come. Ubisoft is an equal opportunity employer that believes diverse backgrounds and perspectives are key to creating worlds where both players and teams can thrive and express themselves. If you are excited about solving game-changing challenges, cutting edge technologies and pushing the boundaries of entertainment, we invite you to join our journey and help us create the unknown. 

At Ubisoft, we are redefining how business teams interact with information through the power of AI. Our focus is on building or assembling applications that enable smarter, more interactive, and document-rich solutions. From hybrid search, question-answering and document drafting to research (legal, consumer, marketing), from conversational experiences to agentic processes, we are creating tools that empower users to extract insights, make decisions, and drive innovation.

We are seeking a highly experienced Senior Software Engineer to join our team in charge of the development of scalable back-end systems that power these cutting-edge AI applications. This is a unique opportunity to work at the intersection of AI, large-scale data processing, and cloud infrastructure, with significant room for growth and impact.

Responsibilities

As a Senior Software Engineer – AI Applications, you will play a critical role in designing and building the back-end systems that enable our (mostly RAG-based) solutions. You will work on challenges such as integrating large language models (LLMs) with retrieval systems, optimizing hybrid search pipelines, and building document-rich applications that deliver real-world value. This role requires a deep understanding of modern AI/ML integration, as well as a passion for solving complex problems.

• Architect and Develop Back-End Systems: Design and implement scalable, high-performance back-end solutions to support AI applications, including data processing pipelines, document processing systems, and cloud-based infrastructure.
• Optimize Performance: Ensure low-latency, high-throughput serving of AI models and APIs, optimizing for both speed and reliability.
• Collaborate Across Teams: Partner with data scientists and ML engineers to integrate AI models into production systems, ensuring seamless deployment and monitoring.
• Cloud Infrastructure: Build and maintain cloud-native solutions using platforms like AWS, or Azure, with a focus on scalability, security, and cost-efficiency.
• Technical Leadership: Mentor junior engineers, conduct code reviews, and contribute to the overall technical strategy of the team.
• Stay Ahead of the Curve: Keep up-to-date with the latest trends and technologies in AI, cloud computing, and software engineering, and bring innovative ideas to the table.

We are seeking a seasoned professional with a strong technical background and a passion for building world-class AI applications.

Must-Have Qualifications:

• Experience: strong professional and practical software engineering experience, with a focus on back-end development in a compute-intensive and/or data-intensive environment.
• Programming Skills: Expertise in languages such as Python, Java, Rust, or C++.
• Cloud Expertise: Hands-on experience with cloud platforms (AWS, GCP, Azure) and containerization technologies (Docker, Kubernetes).
• AI/ML Integration: Experience deploying and serving machine learning models in production environments.
• System Design: Strong understanding of system architecture, microservices, and API design.
• Problem-Solving: Proven ability to tackle complex technical challenges and deliver innovative solutions.

Nice-to-Have Qualifications:

• Familiarity with Deep Learning architectures, Language Models, Vision Models
• Understanding of RAG-based architectures (indexing, embedding, vector databases and search, query processing)
• Experience with serverless architectures and event-driven systems.
• Contributions to open-source projects or publications in relevant fields.

Growth Opportunities

Joining our team as a Senior Software Engineer in AI Applications offers a unique chance to work on industry-leading projects that shape the future of AI technology. You will have the opportunity to:

• Engage in continuous learning and professional development to stay at the forefront of AI advancements.
• Take on increased responsibilities and influence the strategic direction of our AI product offerings and drive impactful innovation.

Ubisoft's perks (for a position based in Saint-Mandé)

• 💰 Profit Sharing, yearly company saving plan. 25 paid time off + 12 additional paid days off. 50% of your transportation pass is paid by the company, lunch vouchers (9€/day), healthcare for you and your family, and lots of Ubisoft additional perks. 
• 👶 Maternity leaves of 20 weeks, paternity/co-parental leaves of 7 weeks. 
• 📍 Our office is located in Saint Mandé, (Metro line 1, Saint Mandé station). Gym available in the building. Ability to work with a hybrid work arrangement according to the Ubisoft Work From Home policy.  

Additional Information 
Ubisoft offers the same job opportunities to all, without any distinction of gender, ethnicity, religion, sexual orientation, social status, disability, or age. Ubisoft ensures the development of an inclusive work environment which mirrors the diversity of our gamers’ community. 
The job reports to Ubisoft Mobile Games. 

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