Lead Systems Engineer

Join Contentsquare as a Software Engineer focused on streaming and data-intensive systems. In this role, you will design and implement high-performance solutions that handle large data flows, ensuring scalability and reliability. Collaborate with cross-functional teams to drive innovation and enhance our data processing capabilities.

Join the Innovators at AragoArago is a pioneering company at the forefront of artificial intelligence and semiconductor technology, dedicated to advancing the future through groundbreaking innovations.Established in 2024 by a team of visionary AI researchers and physicists, Arago harnesses expertise in photonics, electronics, software, mathematics, and machine learning. Our nimble team consists of talented engineers and scientists from leading global institutions.With a multicultural team representing nine nationalities, we operate from key hubs in France, North America, and Israel. We are passionate about exceptional science and rapid progress, guided by principles that define our culture:Deliver Excellence: We take pride in our work, ensuring it meets the highest standards.Speed of Execution: We value quick, decisive actions, progressing efficiently to achieve our goals.Collaborative Spirit: We work as one cohesive unit, fostering relationships built on trust and respect.Supported by leaders from major tech companies such as Apple, Arm, Nvidia, Microsoft, and Hugging Face, along with esteemed venture firms, Arago is poised to redefine the future of technology.

Join Speechify as a Software Engineer specializing in Data Infrastructure & Acquisition. In this role, you will play a vital part in developing and maintaining our data ecosystems, ensuring seamless integration and acquisition of data that drives our innovative products. You will collaborate with cross-functional teams to design robust solutions that enhance our platform’s capabilities.

About VibeAt Vibe.co, we are revolutionizing the way brands connect with audiences in the streaming era. We envision that streaming TV transcends traditional brand awareness; it is poised to be the next major avenue for performance marketing. Our mission is to create the infrastructure that harnesses this $100 billion potential.As a leader in Audience First Streaming TV Advertising, Vibe.co empowers marketers to leverage TV as an effective growth channel. Our comprehensive solution integrates hyper-targeted audience segmentation, AI-driven insights, real-time campaign optimization, and incrementality measurement, providing brands of all sizes the accuracy and transparency they expect from social and search advertising, applied to the TV landscape.With over 10,000 trusted brands and a reach of more than 120 million households across 500+ apps and channels, Vibe.co consistently delivers an impressive average return on ad spend of 250% and a 20% lift in sales. Achieving a $100 million revenue run rate in less than two years, we are among the fastest software companies to reach this remarkable milestone.Our investors include notable firms such as Hedosophia (early backer of Spotify, Uber, and Airbnb), Elaia, Singular, QuantumLight, and Illusian, alongside angel investors like Carolyn Everson, board member of The Walt Disney Company and Coca-Cola. Nirav Tolia, CEO of Nextdoor, is also a member of our board of directors.Founded in 2022, Vibe.co is recognized as a pioneering platform in streaming TV advertising, merging the power of performance marketing akin to Meta and Google with the fast-evolving media landscape.About the RoleAs a key member of the Performance team, you will play a vital role in managing advertiser outcomes at Vibe. Your focus will be on bidding, pacing, and enhancing the prediction stack that drives these elements. You will report directly to Clément Schiano, Engineering Manager for Performance.This position has been created to address a clear roadmap and enhance execution capabilities, as well as to mitigate knowledge concentration challenges within the team. We seek an individual who can absorb, challenge, and expand upon existing expertise, going beyond simply delivering tickets.Three compelling reasons why a talented candidate would find this role appealing:

Back Market is looking for a Senior Software Engineer focused on Order Management Systems to join the team in Paris. This position centers on developing and refining the platform to support a smooth experience for customers as they place and manage orders. Role overview This engineer will play a key part in building and maintaining scalable software solutions for order management. The work involves collaborating with colleagues from different departments to design, implement, and support features that improve how orders are handled across the platform. What you will do Contribute to the development and optimization of the order management platform Work with cross-functional teams to create and maintain scalable solutions Help ensure a seamless experience for customers managing orders Drive improvements and support ongoing innovation in order management processes Requirements Experience in software engineering, particularly with order management systems Ability to design, implement, and maintain scalable software Strong collaboration skills to work with multiple teams

About UsAt Harmattan AI, we are pioneering the development of autonomous and scalable defense systems. With a recent $200 million Series B funding round that has raised our valuation to $1.4 billion, we are poised for growth and are seeking talented individuals to join our mission of delivering cutting-edge systems to allied forces.Our guiding principles are centered around creating impactful technologies, striving for excellence, setting ambitious objectives, and confronting complex technical challenges head-on. We thrive in a dynamic environment where accountability, precision, and execution are critical.About the RoleWe invite a passionate Backend Software Engineer to become a vital part of our C2 Core team in Paris. In this role, you will be instrumental in developing the foundational architecture for our advanced tactical Command and Control (C2) application. You will operate in a high-stakes, technical environment where low latency, high availability, and secure data management are crucial.Your primary responsibilities will involve ensuring seamless data flow for real-time telemetry, high-bandwidth video streams, and mission commands between our fleet of robots and the internal C2 components, including the Common Operational Picture (COP) and Mission Planner. This system is designed for deployment on ruggedized tactical PCs in field environments often characterized by limited network connectivity.

Join Vibe and Transform Streaming TV AdvertisingAt Vibe.co, we are revolutionizing the way brands connect with audiences in today’s streaming landscape. We see streaming TV not merely as a platform for brand awareness but as a powerful performance marketing channel offering immense potential. Our mission is to build the infrastructure that will unlock this $100 billion opportunity.Vibe.co delivers an Audience First Streaming TV Advertising solution, enabling marketers to harness the full power of TV as a growth channel. Our comprehensive platform integrates precision audience targeting, AI-driven insights, real-time campaign optimization, and effective incrementality measurement, equipping brands of all sizes with the same level of accuracy and transparency they expect from digital channels.With the trust of over 10,000 brands and coverage reaching more than 120 million households across 500+ applications and channels, Vibe.co boasts an impressive average return on ad spend of 250% and a 20% lift in sales. In under two years, we achieved a remarkable $100 million revenue run rate, placing us among the fastest software companies to reach this milestone.Supported by renowned investors such as Hedosophia, Elaia, and several angel investors including Carolyn Everson of The Walt Disney Company, we are proud to be recognized as the leading platform in streaming TV advertising. Founded in 2022, Vibe.co is at the forefront of bringing advanced performance marketing to the rapidly growing media sector.Your Role as a Senior Software Engineer - SREAs part of our Infra Platform team, you will play a critical role in the engineering backbone of Vibe. This team is responsible for hosting, provisioning, observability, CI/CD, internal tools, security, and compliance. Every product and platform team relies on the solutions we develop.You will report directly to our Lead Platform Engineer and collaborate closely with the team to establish the technical direction and uphold the infrastructure standards that are vital for the company’s success. Given the rapid growth of our platform, which is currently utilized by over 60 engineers daily, we are seeking a candidate who will take ownership and drive the scaling process. You will engage with infrastructure that processes over 600,000 queries per second, ensuring optimal latency and performance.

Join the Arago TeamArago is at the forefront of innovation in AI and computer hardware, dedicated to advancing technology and shaping the future. Our mission is to catalyze breakthroughs at the intersection of artificial intelligence and semiconductor technology.Established in 2024 by leading AI researchers and physicists specializing in photonics, electronics, software, mathematics, and machine learning, Arago consists of a dynamic team of engineers and scientists sourced from prestigious companies and research institutions around the globe.With a diverse team representing nine nationalities and operational hubs in France, North America, and Israel, we thrive on exceptional science and rapid progress. Our guiding principles include:Deliver Excellence: We take pride in the quality of our work.Agility: We prioritize speed and efficiency in our processes.Team Synergy: We foster a collaborative environment built on trust and respect.Our esteemed team is supported by executives from industry giants such as Apple, Arm, Nvidia, Microsoft, and Hugging Face, alongside influential deeptech venture capitalists and successful founders.

Join Polar Analytics: The Premier Data Platform for Consumer Brands ‍At Polar Analytics, we transform complex data into actionable insights, empowering brands to make informed decisions swiftly and efficiently. Our platform is powerful yet accessible, providing DTC brands with the analytics they need to achieve scalable profitability. Our mission is clear: we aim to accelerate the growth of independent DTC brands—enabling them to compete effectively and profitably.Why Choose Polar Analytics? 4,000+ Brands and CountingWe’ve expanded to over 4,000 active merchants as of January 2025, with plans to reach 10,000+ within this year. Revolutionizing AnalyticsPolar is redefining the Shopify analytics landscape through innovative data infrastructure designed for seamless orchestration—placing us at the leading edge of AI-powered commerce automation. Supported by Top-Tier InvestorsWe have successfully raised $28.5M from prestigious investors like Frst, Point9, and Chalfen Ventures, recognized for identifying future industry leaders early. A Team of eCommerce & Data InnovatorsOur diverse team comprises seasoned professionals from leading eCommerce SaaS platforms and Silicon Valley data powerhouses, all united by a common goal: to forge the next industry leader.About UsWe are developing a cutting-edge data & AI operating system tailored for eCommerce—think of it as Datadog for retail.Our work involves processing and refining complex Shopify, advertising, and retention data, making it reliable and actionable for teams.We are seeking engineers who desire real ownership and impact.Your RoleIn this role, you will be engaged with core systems including data pipelines, semantic layers, AI evaluation, and experimentation tools that are vital for thousands of merchants daily.This is not a conventional ticket-taking position. You will:Take ownership of challenges from design through to productionSolve complex infrastructure issues (handling petabytes of data, near real-time processing, and high reliability)

Role overview Harmattan AI seeks an Embedded Software Engineer to join the Paris office. The focus is on building embedded solutions that enhance multimedia applications and user experiences. What you will do Design and develop embedded software for multimedia systems Work closely with team members from various disciplines to bring new concepts to life Contribute to maintaining high standards for software quality and performance Location This role is based in Paris.

About UsHarmattan AI is a pioneering defense technology company focused on developing autonomous and scalable defense systems. After successfully securing $200M in Series B funding, which values the company at $1.4 billion, we are actively expanding our teams to enhance our capabilities and deliver critical systems to allied forces.Our mission is driven by a commitment to creating real-world impact through technology, striving for excellence, setting ambitious objectives, and tackling the most challenging technical problems. We operate in a high-stakes environment where rigor, accountability, and execution are paramount.About the RoleAs a Software Engineer on the Ground Control Systems (GCS) team, you will be instrumental in developing our new line of drone controllers—high-performance, Android-based control stations tailored for professional UAV operations. Your role will involve extending and adapting the open-source QGroundControl platform (C++/Qt) to work seamlessly with our proprietary hardware, enhancing its features while ensuring reliability, performance, and scalability across various missions.ResponsibilitiesApp Development: Design, develop, and optimize our QGroundControl-based application utilizing C++ and Qt.Hardware Integration: Customize the application interface with physical controls (joysticks, buttons, switches, touchscreen) to provide a cohesive user experience.Feature Implementation: Transform user needs and mission requirements into actionable functionalities and UX/UI enhancements.Platform Maintenance: Port and maintain the application across different Android versions, ensuring optimal performance, compatibility, and security.Deployment: Oversee application updates and releases across our device fleet.Collaboration: Collaborate closely with embedded systems and electronics teams to facilitate smooth hardware/software integration, and partner with QA for field validation.

Blockchain.com has grown into one of the largest cryptocurrency platforms, supporting over 90 million wallet holders and more than 40 million verified users since 2011. The company has handled over $1 trillion in cryptocurrency transactions, providing secure access to digital assets for millions worldwide. Role overview The Institutional team in Paris is seeking a Senior Software Engineer to help develop products and services tailored for institutional clients. Collaboration, clear results, and ongoing improvement shape the team’s approach to their work. What you will do Work with engineers and stakeholders to deliver software solutions for institutional clients Contribute to a high-performance team focused on innovation and efficiency Help refine processes and drive measurable outcomes Support a culture that values learning and team growth Requirements Professional experience as a software engineer, ideally in a similar setting Strong teamwork and communication abilities Openness to learning and adapting in a rapidly changing field Dedication to delivering dependable, high-quality software Location This role is based in Paris.

Theodo Group: A Journey of Innovation and SuccessSince 2009, Theodo has been dedicated to supporting innovative companies in the design, development, and deployment of ingenious digital products, leveraging the best of technology and Lean methodologies.With over 15 years of exceptional growth, Theodo has expanded to a team of more than 700 passionate software engineers committed to continuous improvement. As we scale, we have structured ourselves into specialized units focused on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to achieve a revenue of €100 million.Established in 2016, Theodo Data & AI serves as the data and AI division of Theodo. Our goal is to partner with clients in shaping and deploying their data strategies, as well as researching and developing state-of-the-art AI solutions.The company is experiencing rapid growth, with Theodo Data & AI recording an annual revenue increase of over 30%, creating exciting new opportunities for our team!Why We Are Hiring a Lead Data Software Engineer?To contribute to the growth of Theodo Data & AI and to strengthen our Data Software Engineering teams, we are seeking an experienced professional.

Join our dynamic team at Dedale Intelligence as a Data Engineer, where you will play a pivotal role in designing and implementing innovative data solutions. Your expertise will help us harness the power of data to drive business insights and enhance decision-making processes.

Join BlaBlaCar as a Senior System and Network EngineerBlaBlaCar, the world's foremost community-driven travel application, connects 27 million members annually for carpooling and bus travel across 21 countries. With a diverse team of 800 professionals from over 50 nationalities, we operate from five global offices, with 30% of our workforce thriving in fully remote roles.Your RoleAs a Senior System and Network Engineer within our IT Operations team, you will be instrumental in delivering robust IT services and solutions throughout our organization, ensuring efficiency and security. Your expertise will help streamline our network and software solutions, empowering our team members to perform at their best. You will work in close collaboration with both the Security and Engineering teams to uphold the integrity, availability, and reliability of our IT infrastructure.Reporting directly to Henry Marinho Faiacida, our IT Operations Manager, you will join a skilled team of six, comprising three IT Engineers and three Tech Support Experts.Key ResponsibilitiesIn this role, you will serve as a vital resource for knowledge, best practices, and the execution of technological innovations. Your main responsibilities will include:• Leading IT projects from inception to completion in collaboration with various engineering teams.• Setting up, administering, and maintaining IT SaaS systems and applications.• Reviewing and optimizing SSO workflows within SaaS platforms to ensure peak performance.• Keeping our infrastructure current by implementing security policies, patches, and necessary updates.• Partnering with the Security team to enforce security policies, permissions, and procedures.• Ensuring compliance across all hardware, including networking equipment, computers, IoT devices, and printers.• Taking responsibility for L2/L3 support troubleshooting within the IT Operations domain.• Communicating effectively with internal departments and stakeholders.Scope of Work:• Overseeing users' technical working environment across various development departments.

Are you passionate about innovating in the tech world? Do you thrive on tackling intricate business challenges in a dynamic, collaborative, and inclusive environment? At Capital One, you will join an energetic team of innovators and problem-solvers committed to addressing genuine customer needs.We are on the lookout for Full Stack Software Engineers who are eager to integrate data with cutting-edge technologies. As part of the Capital One team, you will play a pivotal role in a significant transformation initiative.In this position, you will contribute to an enterprise-wide data management and governance application designed to oversee digital assets, including datasets, data stores, and applications across Capital One. This centralized repository will enhance the navigation, discovery, and management of digital assets, ensuring data security and compliance.

Are you enthusiastic about data and its applications within the space sector? Do you aspire to broaden your skills and be a part of a dynamic and innovative field? At Novaspace, you will enter an exciting international consulting group that specializes in the rapidly evolving space industry. We are on the lookout for a Data Engineer Intern to aid in our strategic initiatives by developing cutting-edge data-centric products.As a Data Engineer Intern, you will collaborate with our digital and data team, playing a vital role in supporting our digital activities and shaping our data strategy within the space sector.

Join Our Mission to Transform Healthcare At Doctolib, we are on a mission to revolutionize the healthcare experience through cutting-edge technology. Our passionate tech team is dedicated to creating innovative products and features that enhance the daily lives of healthcare practitioners and their patients. Working in an agile environment, we collaborate closely with engineering, design, and business teams to achieve our goals. Your Role We are seeking a Senior Software Engineer to become a vital member of our Design System & Accessibility Team. Your contribution will be paramount in making Doctolib the leading digital and secure medical companion for patients. In our Platform domain, we focus on building and maintaining essential building blocks of our system with a "Platform as a Product" mindset. Our objective is to simplify the use of these complex components, allowing product teams to concentrate on their core mission: delivering faster solutions for healthcare professionals and patients. Why Your Work Matters: With a significant 80% of our traffic coming from mobile users, your role will be instrumental in bridging the gap between our Web and Mobile Design Systems, ensuring a seamless user experience across platforms. As part of the Frontend Platform team, you will empower all Doctolib Tech and Product teams to develop accessible, top-tier frontend applications. We achieve this by providing a robust web and mobile design system, creating supportive tooling, and offering guidance as Accessibility experts. Key Responsibilities: Design, build, and maintain a scalable web and mobile Design System using React and React Native to ensure consistent, accessible, and high-performance user experiences. Guide the convergence of Web and Mobile Design Systems, ensuring visual and functional consistency across React and React Native components. Develop and maintain React Native components for a seamless cross-platform experience. Mentor team members on React Native best practices, promoting a mobile-first culture within the Design System team. Collaborate with Product Designers to transform Figma designs into robust, reusable UI components, maintaining visual and functional parity between design and implementation. Advocate for accessibility (A11y), embedding inclusive design principles in our Design System and developing accessible components.

About Homa Games Homa Games creates and publishes mobile games for a global audience. With over 80 titles launched and more than 2 billion downloads, the team has seen games like 'All in Hole' reach the global top-50 grossing charts. The company works with both in-house and partner studios to deliver games that connect with players worldwide. Technology and Approach Homa Lab, the company’s proprietary platform, provides developers with market intelligence, data tools, and AI-powered game technology. This platform helps teams quickly test ideas, find product-market fit, and scale games that engage players for the long term. AI is woven into daily operations and strategic decisions, supporting everything from routine tasks to high-level planning. How Homa Works The operational model centers on a feedback loop: Homa Lab helps studios spot promising concepts, turn them into playable games, and reach millions of players. Each launch produces data and insights that inform future projects and improve efficiency. This cycle aims to refine the process and increase the chances of success with each new game. Team and Culture Homa’s team includes more than 220 people representing over 30 nationalities. Many bring experience from leading studios and companies in the gaming industry. The culture values ambition, curiosity, humility, and focus, and emphasizes speed, excellence, and transparency in delivering results. Growth and Vision Since its founding, Homa Games has raised $165 million from investors such as Headline, Northzone, Eurazeo, and Bpifrance, along with founders from King, Sorare, and Spotify. The company is committed to building gaming experiences for the next billion players and shaping the future of entertainment.