Senior Software Engineer at Alice & Bob | Paris

Join Scaleway, a pioneering cloud service provider, as a Software Engineer - Compute. In this dynamic role, you will collaborate with a talented team to design, develop, and maintain cutting-edge computing solutions that empower our global customer base. Your expertise will contribute to innovative projects that push the boundaries of technology and enhance …

Alice & Bob is pioneering the development of the first universal, fault-tolerant quantum computer aimed at tackling some of the most challenging problems in the world. Our innovative quantum computer is based on a revolutionary type of superconducting qubit known as the Schrödinger cat qubit. Unlike traditional superconducting platforms, cat qubits possess the remarkable capability to autonomously implement quantum error correction!We are leading the quantum revolution, standing shoulder to shoulder with industry giants like Google and IBM, and we are rapidly expanding following our successful €100 million funding round in 2025 dedicated to advancing our unique technology.With over 100 talented individuals, including physicists, PhD students, engineers, and seasoned business professionals, we are united in our quest to achieve our ambitious vision. Are you ready to join us as a quantum pioneer and help reshape the future?About the Role:The Calibration Team is tasked with automating the calibrations of our Quantum Processing Unit (QPU) to maximize its performance and ensure its operational reliability. As a Senior Software Engineer within this team, you will be instrumental in architecting the automatic calibration software. You will collaborate closely with quantum scientists to develop, maintain, and enhance the calibration processes. Additionally, you will work alongside other software engineers across the organization to facilitate seamless integration of your team's software with other in-house software components.

OUR STORY: Become a part of Scaleway and help us build the sovereign cloud of the future!Since our inception in 1999, we have been committed to creating secure and sustainable infrastructures that support the most ambitious businesses.Initially recognized for our dedicated servers (Dedibox), we transitioned to cloud computing in 2015. Remaining true to our core values of simplicity, flexibility, and technical excellence, we have emerged as a leading force in Europe’s cloud sector.As artificial intelligence continues to rise, we have fortressed our commitment with the support of the Iliad Group, which is investing €3 billion to establish a formidable, sovereign AI alternative to the dominant American and Asian players.Daily, Scaleway proudly serves thousands of customers across both private and public sectors, encompassing corporations like France Télévisions and Hachette Livre, rapidly growing startups like Photoroom and Biolevate, and institutions such as the City of Copenhagen. Our offices can be found in Paris, Lille, Toulouse, Rennes, Rouen, Bordeaux, and Lyon.WHY WE NEED YOU?Our rapid growth necessitates the expansion of our Account team, which is a vital part of the Scaleway Elements cloud ecosystem.This team manages user accounts, personal data, support plans, fraud detection, and more, ensuring a seamless experience across the platform through close collaboration with various product teams. Your role will involve contributing to both the DevOps and feature development lifecycle, aimed at enhancing the reliability, scalability, and quality of our user management services. YOUR FUTURE TEAM:You will join a team of 6 individuals: a friendly and supportive group of developers who prioritize teamwork and continuous improvement. You’ll collaborate with frontend and backend developers to enhance the Scaleway Console, maintaining high standards through automated testing, agile methodologies, and continuous delivery. Manager: Y...

Scaleway has provided secure and sustainable infrastructure since 1999. The company began with dedicated servers under the Dedibox brand, then expanded into cloud computing in 2015. Today, Scaleway is recognized as a European cloud provider. With support from the Iliad Group and €3 billion invested in building a sovereign AI alternative, Scaleway is positioned to address growing needs in artificial intelligence. The company’s work is shaped by three core values: simplicity, flexibility, and technical expertise. Scaleway serves a broad range of clients, including large enterprises like France Télévisions and Hachette Livre, startups such as Photoroom and Biolevate, and public organizations including the City of Copenhagen. Location This Software Engineer position is based in Paris. Scaleway also maintains offices in Lille, Toulouse, Rennes, Rouen, Bordeaux, and Lyon.

Join our innovative team at Scaleway as a Software Engineer focusing on Network Products Core. In this role, you will develop and enhance cutting-edge network solutions that empower our cloud infrastructure. You will collaborate with cross-functional teams to design, implement, and optimize network functionalities, ensuring high availability and performance.

Join our dynamic team at Scaleway as a Software Engineer specializing in Symfony! In this role, you will be responsible for developing and maintaining robust web applications using the Symfony framework. Collaborate with cross-functional teams to design, develop, and implement new features while ensuring optimal performance and security.

About UsHarmattan AI is at the forefront of innovation in defense technology, developing autonomous and scalable systems that enhance mission capabilities. Following our successful $200 million Series B funding round, which valued the company at $1.4 billion, we are actively expanding our teams to deliver critical systems to allied forces.Our operations are driven by a commitment to creating technologies that make a significant impact, striving for excellence, setting ambitious objectives, and tackling challenging technical problems. In our fast-paced environment, we expect rigor, ownership, and execution from every team member.About the RoleWe are seeking a talented Software Engineer to join our Geometric Scene Understanding team in Paris. This role involves bridging the divide between advanced mathematical research and essential production software. While our Computer Vision (CV) engineers focus on developing core algorithms for 3D reconstruction—including SfM, SLAM, and Neural Radiance Fields—you will transform these intensive prototypes into high-performance, real-time engines designed for resource-constrained tactical hardware.As the architect of our pipeline, you will process live drone telemetry and video, producing real-time 3D battlefield renderings that enhance the Common Operational Picture (COP) for our users.ResponsibilitiesPipeline Development: Design and implement a robust software pipeline to ingest, decode, and synchronize multiple drone video streams and telemetry data efficiently.Performance Optimization: Analyze CV algorithms and optimize performance by leveraging GPU acceleration (CUDA, Vulkan, or TensorRT) and CPU multi-threading to achieve near real-time 3D reconstruction.Spatial Data Management: Develop efficient 3D data structures, such as Octrees or Voxel grids, for storing, compressing, and streaming point clouds or meshes without exceeding memory limits.Code Translation: Work collaboratively with CV engineers to convert Python/PyTorch prototypes into stable, production-ready C++ code that operates seamlessly for extended periods without memory issues.Testing and Validation: Deploy builds on actual tactical PCs and evaluate performance metrics, including thermal management and GPU utilization during live drone operations.

Join Alice & Bob, a pioneering force in quantum computing, as we develop the first universal, fault-tolerant quantum computer designed to tackle the world’s most challenging problems.Our vision revolves around a groundbreaking superconducting qubit known as the Schrödinger cat qubit ‍⬛, which uniquely empowers autonomous quantum error correction, setting it apart from traditional superconducting platforms.Comprising a diverse team of over 140 exceptional talents from more than 20 countries, we are driven by a singular mission: to transform the landscape of computing with a practical fault-tolerant quantum machine. Are you prepared to embrace unparalleled challenges and help reshape the future of technology? Become a part of our journey, and let’s revolutionize quantum computing together!The Calibration Team is dedicated to automating the calibration processes of our cat‑qubit Quantum Processing Unit (QPU) to optimize performance and ensure continuous operational integrity. As a Calibration API Software Engineer, you will be responsible for developing and maintaining the calibration API and supporting libraries utilized by physicists to create automated calibration blocks, analysis routines, and calibration reports. Your role will be crucial in ensuring these tools are resilient, thoroughly tested, CI/CD friendly, and seamlessly integrated with our internal acquisition software that governs the QPU.

Alice & Bob is pioneering the development of the world's first universal, fault-tolerant quantum computer to tackle the most challenging problems that humanity faces.Our vision revolves around creating a revolutionary superconducting qubit known as the Schrödinger cat qubit, which stands out in the realm of superconducting platforms by its remarkable capacity to autonomously implement quantum error correction!As a leader in the quantum race, we are in direct competition with industry giants like Google and IBM, and our growth trajectory is accelerating, thanks to securing €100 million in funding in 2025 for advancing our groundbreaking technology.Currently, we boast a diverse team of over 100 professionals including physicists, PhD candidates, engineers, and seasoned business experts, all united in our ambitious mission to redefine the future of quantum computing.About the Team:The Framework Team serves as a vital resource, collaborating across the organization with researchers and technicians, and is fundamentally woven into our operational workflows. As a Senior Software Engineer within this team, you will be instrumental in designing, developing, and maintaining top-tier software solutions. Your contributions will enhance our core products and foster innovation as you help build our proprietary software that governs hardware and the experiments we conduct. You will also take on a technical leadership role, mentoring junior engineers and influencing architectural decisions.About the Role:You will lead the definition of our service and platform architecture designed to enable agility, evolution, and scalability of our quantum computing stack. Your primary objective is to create a cohesive, maintainable, and future-proof platform that underpins experimental workflows, automation, logical systems, and ultimately facilitates the delivery of a QPU-as-a-product for high-performance computing or cloud users.Your role will be pivotal in bridging scientific R&D, data engineering, and production-grade platform design, allowing researchers and physicists to iterate swiftly without sacrificing reliability.

Join the Ubisoft AI Initiatives team and help architect the future of information lifecycle management at Ubisoft. From advanced hybrid search pipelines to sophisticated agentic reasoning capabilities, we create tools that transform raw data into swift, informed decision-making. If you are eager to push the boundaries of collaboration between humans and AI to tackle complex challenges, this position is perfect for you.We are seeking an experienced Senior Software Engineer to become a vital member of our team focused on developing scalable back-end systems that power these cutting-edge AI applications.ResponsibilitiesAs a Senior Software Engineer – AI Applications, you will play a crucial role in designing and building essential services that enable our solutions. You will work at the intersection of AI, enterprise cloud applications, large-scale data processing, and cloud infrastructure, with numerous opportunities for growth and impact. This role requires a solid understanding of modern architectures, AI/ML integration, and a genuine passion for solving complex problems.Architect and develop back-end systems: Design and implement high-performing, scalable back-end services to support AI applications.Optimize performance: Ensure low-latency serving and high throughput for AI models, agents, and APIs while optimizing speed and reliability.Collaborate with teams: Partner with data scientists and ML engineers to integrate advanced AI models and agents into production, ensuring smooth deployment and monitoring.Cloud infrastructure: Build and maintain cloud-native solutions using platforms like AWS or Azure, focusing on scalability, security, and cost management.Technical leadership: Mentor junior engineers, conduct code reviews, and contribute to the team’s overall technical strategy.Technology watch: Stay updated on the latest trends in AI, cloud computing, and engineering, and propose innovative ideas.Joining our team as a Senior Software Engineer – AI Applications offers a unique opportunity to work on cutting-edge projects that shape the future of AI technology. You will have the chance to:Engage in continuous learning to stay at the forefront of AI advancements.Take on more responsibilities and influence the strategic direction of our AI products while contributing to high-impact innovation.

About Mistral AI Mistral AI builds high-performance, open, and efficient AI systems designed for the next wave of applications. The team develops and operates advanced infrastructure that connects large-scale distributed systems, cloud platforms, and high-performance computing (HPC) environments. This backbone supports both research and production workloads at scale. The company values collaboration and a low-ego approach, bringing together skilled professionals across Europe, the United States, and other regions. As Mistral AI grows, the team is establishing core infrastructure to support thousands of nodes and systems handling petabytes of data. Learn more about the team and company culture at https://mistral.ai/careers.

Role overview Scaleway is looking for a Site Reliability Engineer (SRE) focused on Compute services in Paris. This role centers on maintaining the reliability, performance, and scalability of our cloud infrastructure. The SRE will play a key part in supporting our customers and improving how we run and operate our systems.

Join the innovative Ubisoft AI Initiatives team and help shape the future of information management within the gaming industry. We are at the forefront of developing advanced hybrid search systems and reasoning agents that transform raw data into rapid, informed decision-making tools. If you are passionate about enhancing human-AI collaboration to tackle intricate challenges, this is the perfect opportunity for you. We are on the lookout for a seasoned Senior Software Engineer to contribute to the creation of robust back-end systems that power our state-of-the-art AI applications.Key Responsibilities:Back-End Systems Development: Design and build scalable, high-performance back-end services that underpin AI solutions.Performance Optimization: Achieve low-latency and high-throughput operation for AI models, agents, and APIs, prioritizing speed and reliability.Cross-Team Collaboration: Work closely with data scientists and ML engineers to seamlessly integrate AI models and advanced agents into production environments, ensuring efficient deployment and monitoring.Cloud Infrastructure Management: Develop and sustain cloud-native solutions utilizing platforms such as AWS and Azure, focusing on scalability, security, and cost-effectiveness.Technical Leadership: Guide junior engineers, perform code reviews, and contribute to the team’s overarching technical strategy.Continuous Learning: Keep abreast of emerging trends and technologies in AI, cloud computing, and software engineering, and propose innovative ideas.As a Senior Software Engineer in AI Applications, you will have a unique opportunity to engage in leading-edge projects that influence the advancement of AI technologies. You will be able to:Participate in ongoing professional development to remain at the forefront of AI innovation.Assume greater responsibilities and influence the strategic development of our AI product offerings, driving significant innovations.

About Harmattan AIHarmattan AI is at the forefront of defense innovation, creating autonomous and scalable defense systems. Following our successful $200M Series B funding round, which has elevated our valuation to $1.4 billion, we are on a trajectory of rapid expansion to enhance our capabilities in delivering critical systems to allied forces.Our core values drive us: we are committed to developing technologies that have a tangible impact, striving for excellence, setting ambitious goals, and tackling the most challenging technical hurdles. We thrive in a high-stakes environment where precision, accountability, and execution are paramount.Role OverviewWe are seeking a talented Computer Vision Engineer to join our dynamic Machine Learning and Computer Vision team. In this pivotal role, you will be instrumental in the development of essential technical components for various robotics and aerospace initiatives.

Join Mistral AI as a Compute Legal Counsel and play a pivotal role in shaping our legal landscape. You will be responsible for structuring, drafting, and negotiating contracts essential to our Mistral Compute operations. Collaborating closely with our legal team, you will advise on a range of legal matters, including compliance, procurement, intellectual property, and privacy. This position is an exciting opportunity to work directly with major industry players like NVIDIA, Dell, Coreweave, Microsoft, and Google, all while based in the vibrant city of Paris, France.

At Joko, we empower consumers to shop smarter and save money. Our mission is to transform the shopping experience, enabling individuals to make informed decisions about their purchases.Founded in Paris, Joko is a tech-driven company and a certified B Corp, boasting over 90 talented employees across Paris, Barcelona, New York, and beyond. Over 5 million users benefit from our services, saving money daily at more than 10,000 merchants through our platform.We offer a range of features, from cashback and automatic coupons to price alerts and carbon tracking, continually enhancing our products to facilitate smarter shopping. Currently, we are developing an AI-powered shopping assistant to help users identify the best products based on price, quality, and impact.Having achieved profitability in our primary market, we are now expanding globally, with a keen focus on the US market.Join us at the forefront of the shopping revolution! Our Engineering TeamOur Engineering team thrives on tackling advanced technical challenges with innovative solutions. With a strong emphasis on product design and innovation, they are shaping the future of shopping. Their goal is to positively influence the everyday lives of millions of users worldwide.As a member of the Engineering team, Software Engineers collaborate closely with the Product team throughout the entire process—from exploration and design to implementation and deployment. At Joko, we understand that teams composed of engineers with diverse skill sets, working in tandem with product teams, can deliver a truly delightful and innovative user experience.The Engineering team is rapidly expanding to continuously innovate across all facets of our product and technology stack, driving the transformation of online shopping. Your RoleAs a Growth Software Engineer, you will play a crucial role in scaling Joko's user and business growth through your coding expertise. Collaborating closely with the Product team, you will iterate quickly on key growth drivers—such as acquisition, retention, and engagement—as we expand into international markets, beginning with the US.You will work at the intersection of product and engineering, propelling the business forward within a dedicated cross-functional task force that includes key members from Marketing, Data, Business, and Product.Growth Experimentation: You will design, build, and deploy experiments across the entire user journey—from onboarding to retention—to drive significant results in key growth metrics.

Photoroom builds visual solutions that support e-commerce for over 300 million users worldwide. Since 2019, the team has processed more than 5 billion images each year for a wide range of clients, from small businesses to major brands like Amazon, DoorDash, and Decathlon. With roots in Y Combinator and recent Series B funding, Photoroom operates as a remote-first company with over 100 professionals across Europe, all focused on improving online selling through better visuals. Role overview The Head of Computer Vision leads a growing machine learning team, currently around 10 engineers and researchers, with plans for further expansion. This leader shapes the technical direction of Photoroom, sets ambitious goals, and explores new AI capabilities for photo editing. The position reports directly to the CTO and plays a central role in guiding both strategy and execution. This role is open to candidates based in Germany, UK, Italy, France, Ireland, Portugal, or Spain, with the flexibility to work remotely. Monthly visits to the Paris office are fully reimbursed. For those relocating to France, Photoroom offers up to €10,000 in support and visa sponsorship. Main responsibilities Set ML strategy: Guide the development and training of foundational models from scratch. Grow and lead the team: Mentor, hire, and scale a high-performing group while maintaining Photoroom's culture and standards. Uphold technical quality: Review code, optimize performance, and solve complex training challenges. Drive innovation: Lead the creation of new capabilities that advance the industry. Bridge research and product: Combine advanced research with fast product delivery. Collaborate across teams: Act as the main point of contact between ML, Product, and Sales. Benefits Competitive salary and stock options Remote work from several European countries Monthly travel to the Paris office fully reimbursed Relocation support up to €10,000 and visa sponsorship for France-based roles Comprehensive tech setup Biannual company retreats

At Joko, we empower consumers to shop smarter, revolutionizing the shopping experience by enabling informed decisions and significant savings.Originating from Paris, Joko is a pioneering tech company and a certified B Corp with a diverse team of over 90 skilled professionals located across Paris, Barcelona, New York, and beyond. With over 5 million users benefiting from our services at more than 10,000 merchants, we are committed to enhancing the shopping experience.Our innovative offerings include cashback, automatic coupons, price tracking, and carbon footprint monitoring. Currently, we are developing an AI-driven shopping assistant to guide users toward optimal product choices based on price, quality, and environmental impact.Having achieved profitability in our primary market, we are poised for global expansion with a strong emphasis on the US market.Join us on this exciting journey to shape the future of shopping!This position is remote-friendly for candidates in France and Spain. Our Engineering TeamsAs a Software Engineer at Joko, you will engage with a variety of cutting-edge technical challenges and impactful projects. Depending on your skills and interests, your contributions could span key areas such as:Tech: Work alongside the Product team to innovate Joko's user-facing products, taking full ownership from ideation through to deployment. You'll tackle complex engineering challenges, such as developing AI-powered shopping assistants or creating scalable algorithms to analyze extensive data from e-commerce platforms worldwide.Operations: Collaborate with all teams at Joko by designing and implementing software solutions that enhance operational efficiency at scale. Projects may include building customer support systems, improving fraud detection, or developing AI tools to streamline team operations. Your ResponsibilitiesAt Joko, we value ownership and adaptability. You will take full responsibility for your projects, guiding them from initial concept to live deployment, ensuring excellence and innovation throughout. We seek versatile engineers equipped with a broad range of technical skills to tackle complex, cross-domain challenges. Your key responsibilities will include:

About H H focuses on advancing superintelligence through agentic AI. The company’s mission centers on automating complex, multi-step tasks that people usually handle, aiming for AI agents to help realize the full range of human potential. H seeks talented AI professionals who care deeply about responsible and safe development, as well as technical progress in agentic systems. The culture values openness, ongoing learning, and teamwork. Every team member’s input matters here. Product Engineering at H The Product Engineering team develops H’s Enterprise Platform, which provides customers with tools and services for essential operational needs. This platform supports large-scale computer-use agents, manages complex workflows, and offers a suite for observability, troubleshooting, and evaluation. Product Engineering connects AI research with practical applications and works closely with teams across the company.