About us : Bull is a story. One with a century of European innovation and a working environment where experts design powerful, sustainable, and sovereign digital solutions, enabling states and industries to retain full control over their data and their AI. Bull is also thousands of engineers, researchers and passionate tech people shaping the future of high‑performance computing, AI, and quantum technologies. Every day, our teams push the boundaries of what is technologically possible – from next‑generation HPC architectures to exascale supercomputers – supported by world‑class R&D, more than 1,600 patents, and unique end‑to‑end capabilities spanning hardware design, software engineering, data science and quantum research. We are a people‑centric, innovation‑driven company, where collaboration spans Europe, the Americas and India. We share a common vision of a responsible and sustainable innovation that delivers concrete impact for our customers. Job Description – AI-Driven Application Developer (HPC/AI Tooling) Location : Bull HPC sites in France: Grenoble (38), Les Clayes-sous-bois (78), Bruyères-le-Châtel (91), Bordeaux (33), Rennes (35), Toulouse (31) or Montpellier (34). Other locations in Europe or Remote options available. Team: Solution, Design & Architecture (SDA) Overview We are looking for a skilled and motivated Application Developer to join a small team focused on designing, developping, and maintainining a business critical internal tooling platform dedicated to HPC/AI cluster design. This role leverages modern AI-assisted development ("vibe coding") using tools such as Claude and Gemini, enabling rapid innovation and high-quality software delivery. You will play a key role in shaping a robust, scalable application used by pre-sales, solution review, factory and delivery teams to model, design, and optimize high-performance computing (HPC) and AI infrastructure. Key Responsibilities · Continue to develop, productize and maintain a business critical internal application for HPC/AI cluster design and simulation having dependencies on other internal critical applications. · Use AI-assisted development tools (Claude, Gemini, etc.) to accelerate coding, prototyping, and problem-solving · Participate in the full software lifecycle: design, implementation, testing, deployment, and maintenance · Collaborate with HPC, infrastructure, and AI stakeholders to translate requirements into technical solutions · Ensure performance, scalability, and reliability of the application · Improve and automate development workflows using CI/CD best practices · Contribute to code reviews, documentation, and knowledge sharing · Continuously explore new tools, frameworks, and approaches to enhance productivity and product quality while maintaining production grade standards. Technical Skills & Experience · Strong experience in software development in a Linux environnent. · Familiarity with AI-assisted coding tools (e.g., Claude, Gemini, Copilot) and modern development practices · Experience building and maintaining web applications or internal tooling · Understanding of HPC, distributed systems, or AI infrastructure (clusters, GPUs, networking, scheduling) is highly desirable · Knowledge of: o APIs and backend development o Frontend frameworks (React, Vue, or equivalent) o Databases (SQL/NoSQL) o Version control (Git) · Experience with CI/CD pipelines, automation, and DevOps practices using AI-driven tooling. · Ability to troubleshoot, debug, and optimize complex systems Soft Skills & Mindset We are looking for someone who is not only technically strong but also demonstrates the right mindset: · Reactive and proactive: able to quickly respond to issues and adapt to changing priorities · Open-minded: embraces new ideas, tools, and ways of working (especially AI-driven development) · Eager to learn: continuously develops skills and stays up to date with emerging technologies · Knowledge sharing: actively contributes to team growth by sharing insights, best practices, and feedback · Collaborative: works effectively with cross-functional teams · Autonomous: capable of driving tasks independently while maintaining alignment with team goals Nice to Have · Experience in HPC cluster design, capacity planning, or performance modeling · Exposure to AI workloads and infrastructure constraints · Exposure to network fabric design and implementation · Familiarity with containerization Why Join Us · Work on cutting-edge AI-assisted development workflows · Contribute to a strategic tool for HPC/AI infrastructure design · Be part of a culture that values innovation, learning, and collaboration · Opportunity to grow your expertise in both software engineering and AI/HPC domains #BULL Join us Here, your ideas, your curiosity and your technical excellence directly shape the next era of advanced computing - unlocking enterprise value, accelerating scientific progress and driving positive impact for society.

AI-Driven Application Developer (HPC/AI Tooling) (Échirolles, FR) @ ATOS International

About this role

Ready to apply?