Front-End Engineer (React) at Blockchain | Paris

Join our dynamic team at iliad-free as an End-to-End Network Performance Engineer specializing in NetDevOps. In this pivotal role, you will be responsible for ensuring optimal performance across our network systems. Collaborate with cross-functional teams to implement innovative solutions, enhance system efficiencies, and drive continuous improvement initiatives.We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to tackle complex challenges head-on. If you possess a strong analytical mindset and a commitment to excellence, we want to hear from you!

Join our dynamic team at iliad-free as a Network Performance Engineer in Paris. In this pivotal role, you will be responsible for optimizing and enhancing the performance of our core network infrastructure. You will work closely with cross-functional teams to ensure the highest standards of network efficiency and reliability.

Join iliad-free as a Network Performance Engineer in Paris, where your expertise will drive the optimization of our network performance. In this dynamic role, you'll analyze network traffic, troubleshoot issues, and develop solutions to enhance overall performance. Collaborate with cross-functional teams to implement best practices and innovative technologies to ensure our network exceeds customer expectations.

Join our dynamic team at myjobcompany1 as a Senior Front-End Engineer (H/F)! In this role, you will play a crucial part in developing cutting-edge web applications that provide an outstanding user experience. You will collaborate closely with designers and backend developers to create seamless and responsive user interfaces. We are looking for innovative thinkers who are passionate about technology and eager to contribute to exciting projects.

About NablaAt Nabla, we are a dynamic collective of entrepreneurs, clinicians, and engineers dedicated to reinvigorating the joy of practicing medicine.In collaboration with a community of innovative clinicians, we have leveraged cutting-edge machine learning to create Nabla: the premier AI assistant designed to restore the human connection in healthcare. By optimizing clinical documentation, Nabla empowers clinicians to prioritize what truly matters—their patients. Currently, over 85,000 clinicians from more than 130 healthcare organizations rely on Nabla to enhance their daily care delivery.We are embarking on an ambitious journey to integrate ambient listening, dictation, coding, and command functionalities into a proactive assistant that seamlessly streamlines both clinical and financial workflows.With a recent $70M Series C funding, we are expanding our team to build the next generation of clinical AI and enhance the lives of clinicians and patients worldwide.This is an exciting moment to join our mission!The Best of AI Serving HealthcareNabla’s remarkable success is a testament to three years of dedicated product development.Guided by former Meta AI Research engineers, our team has consistently envisioned how AI can transform healthcare delivery. Our Machine Learning team is at the forefront of utilizing the latest advancements to unlock AI’s full capabilities within the healthcare sector.Yann LeCun, Chief AI Scientist at Meta and Turing Award laureate, serves as an advisor for Nabla.Engineering Excellence at NablaAt Nabla, our engineering culture is agile, innovative, and deeply technical. Our teams encompass machine learning, native desktop applications, and platform infrastructure, working together to deliver AI reliably and at scale in clinical settings.Your TeamIn our organization, product development is a collaborative effort led by Engineering and Product, structured into cross-functional squads focusing on specific product areas. Each squad comprises product managers, designers, engineers of various specializations, and domain experts, functioning with high ownership. As a Senior Back-End Engineer, you will be an integral part of one of these squads, contributing from end to end to a specific product segment.What You'll DoIn your role as a Senior Back-End Engineer, you will be instrumental in scaling Nabla’s AI-powered healthcare platform. You will own key components of our back-end systems, closely collaborate with product and machine learning teams, and influence the technical direction of our projects.

Join Gorgias as a Senior Front End Engineer, where you'll play a pivotal role in shaping the future of customer service technology. You will work closely with our product and design teams to create seamless user experiences that delight our customers.

Join our innovative team at myjobcompany1 as a Front End Developer (H/F) where your skills will contribute to building dynamic and responsive web applications. We are looking for a passionate individual who thrives in a fast-paced environment and is eager to embrace new challenges.

About UsAt Harmattan AI, we are pioneering the creation of autonomous and scalable defense systems that cater to the needs of modern warfare. Following a successful $200M Series B funding round, our valuation has surged to $1.4 billion, prompting an expansion of our talented teams to deliver mission-critical solutions for allied forces.Our mission is driven by core values: developing technologies that create a tangible impact, striving for excellence in our pursuits, setting ambitious objectives, and tackling challenging technical hurdles. We thrive in a demanding environment where rigor, ownership, and execution are paramount.About the RoleWe are in search of a talented Front-End Engineer to become a vital member of our C2 Core team based in Paris. This role involves crafting the operator's interface for our tactical Command and Control (C2) system, focusing on the Human-Machine Interface (HMI) that connects operators with the battlefield.The context you'll be working in emphasizes the significance of managing cognitive load alongside software performance. The user interface you design will be operational on tactical PCs in the field, demanding real-time updates for the Common Operational Picture (COP), the ability to render multiple live video streams, and an intuitive interface for mission planning and fleet command.Key ResponsibilitiesCOP Visualization: Develop interactive maps and 2D/3D geospatial overlays to visualize real-time robot telemetry, sensor data, and mission routes.Real-Time Video Grid: Build a low-latency, robust video player interface capable of managing multiple streams without freezing the main UI thread.Mission Planning & Command: Create interactive tools enabling operators to establish waypoints, configure mission parameters, and issue real-time commands to the fleet.Performance Architecture: Design a state management system that can efficiently handle high-frequency data from the backend bus while preventing UI jitter or memory leaks.Collaborative Development: Collaborate closely with UX/UI designers, backend engineers, and mission planning algorithm developers to streamline workflows and minimize the number of clicks for operators.Optimization: Ensure the UI meets strict performance benchmarks, including consistent 60fps rendering, even during high-frequency map updates.

nabla is looking for a Senior Front-End Engineer with deep experience in React to join the Paris office. This position centers on building web applications that are both dynamic and user-friendly, with a strong focus on delivering a polished user experience. Role overview Work closely with colleagues across disciplines to design, develop, and refine the front-end architecture. The goal is to ensure applications remain fast, responsive, and reliable. Day-to-day, expect to collaborate with product and design teams to translate ideas into seamless interfaces. What you will do Develop and optimize React-based web applications for performance and usability Work with cross-functional teams to implement new features and improvements Guide junior developers and help set coding standards, testing procedures, and deployment practices Impact This role shapes the quality of nabla’s products and directly influences customer satisfaction. Senior engineers here play a key part in mentoring others and establishing best practices across the front-end team.

Are you an experienced Front-End Developer looking to lead innovative projects in a dynamic environment? Join nexton as a Lead Front-End Developer (H/F) in the heart of Paris. In this role, you will spearhead the development of cutting-edge web applications, collaborating closely with cross-functional teams to create exceptional user experiences.

Join our dynamic team as a Front-End Developer specializing in JavaScript and Angular. In this role, you will leverage your expertise to create engaging and responsive web applications, enhancing the user experience and driving innovation within our projects.You will collaborate with cross-functional teams to define, design, and ship new features, and be part of a vibrant development culture focused on continuous improvement and agile methodologies.

citech is seeking a Consultant SRE with a focus on Mobile and Front-End technologies to join the team in Paris. This position is dedicated to enhancing the reliability and performance of user-facing applications. The role involves close collaboration with both technical and product teams, aiming to support the quality and stability of mobile and front-end projects. Key Responsibilities Collaborate with cross-functional teams to improve the reliability and performance of mobile and front-end systems. Implement Site Reliability Engineering (SRE) principles to ensure smooth and dependable user experiences. Promote and help maintain operational best practices within ongoing projects. Participate in technical discussions and contribute insights to foster continuous improvement. Location This role is based in Paris.

We are seeking a highly skilled Senior Front End Developer (h/f) to join our innovative team at myjobcompany1 in Paris. In this role, you will work on exciting projects, utilizing your expertise in modern front-end technologies to create engaging and user-friendly web applications.Your responsibilities will include collaborating with designers and backend developers, ensuring the technical feasibility of UI/UX designs, and optimizing applications for maximum speed and scalability. You will also have the opportunity to mentor junior developers and contribute to the overall growth of the team.

Join our innovative team at nexton as a Back End Developer specializing in Scala. In this role, you will play a crucial part in designing and implementing robust backend systems that support our applications in the Telco, Media, and Transport sectors. You will collaborate with cross-functional teams to deliver scalable solutions and enhance system performance.

About the Role meilleurtaux is looking for a Lead Front-End Developer to guide the front-end team in Paris. This position focuses on building and improving user interfaces and shaping the company’s digital presence through modern frameworks and development practices. What You Will Do Lead and mentor front-end developers, supporting their technical growth Work closely with cross-functional teams to deliver high-quality products Contribute to strategic planning for front-end projects Promote best practices in front-end development Drive improvements to user experience across digital platforms Location This role is based in Paris.

Join evoriel as a Network Performance Manager, where you will play a crucial role in optimizing our client relations and enhancing network efficiency. In this dynamic position, you'll leverage your expertise to analyze performance metrics and implement strategies that drive exceptional results.

Join our dynamic team at myjobcompany1 as a Back End PHP Developer. You will work on exciting projects that contribute to our innovative software solutions. Your primary focus will be on designing and implementing server-side logic, ensuring high performance and responsiveness to requests from the front end.

Located in the vibrant heart of Paris, Winamax is revolutionizing the online gaming industry. As a leading platform for poker and sports betting in France, we boast a community of over 350,000 players and 600,000 monthly bettors. Our services extend to Spain, Germany, and soon to Italy and Portugal. We pride ourselves on delivering an exceptional experience that is technical, creative, and of high quality. Innovation, unity, and belonging are the core values that shape our unique and multicultural corporate culture.Are you ready to shape the future of gaming?Technically, Winamax offers:• A powerful and innovative gaming engine: dynamic game offer adjustments, highly configurable poker games, and fraud detection.• A distributed and scalable architecture designed for real-time processing of platform flows.• A modular platform adhering to high availability and data security constraints, capable of handling heavy traffic.ABOUT THE ROLEAs a member of the Poker team, you will play a key role in the design, implementation, and oversight of the microservices powering our poker platform.ROLE DESCRIPTION• Design of the platform architecture.• Development of highly available and scalable microservices.• Development of APIs and data models.• Writing unit and end-to-end tests, and running scenarios in real-world conditions.• Participating in team code reviews.• Deployment of applications on AWS.• Monitoring and optimization of the poker platform.• Documenting the architecture and poker services.• Collaborating with Front-End, Data, Infrastructure, Security teams, and project managers.Examples of projects include:• Creating a poker gateway with authentication, rate limiting, routing, and pub/sub (10K+ messages/second).• Implementing a registration microservice (1,000 registrations/second).PROFILE SOUGHTThe ideal candidate will possess the following qualities and skills:• Significant experience in developing Back-End services on high-traffic platforms (10K+ requests/second).• Proven experience with load balancing, high availability, scaling, caching, database, and storage challenges.• Proficiency in architectural best practices and microservices development.

Senior React Front-End Developer (All Genders) Why choose Valtech? We are the innovation leader in experience, a trusted partner to the world's most recognized brands. For our team members, we provide opportunities for growth, a culture grounded in values, international career prospects, and the chance to shape the future of customer experience. Opportunity At Valtech, you will find an environment conducive to continuous learning, tangible impact, and professional growth. Whether you're developing new digital solutions, challenging conventional wisdom, or crafting the next generation of customer experiences, your contributions will help transform industries. We take pride in: Our work and the innovation we foster Our values: 'Share, Dare, Care' A corporate culture that promotes creativity, diversity, and autonomy Our borderless global structure that facilitates seamless collaboration Role As a Senior React Front-End Developer (All Genders), you are passionate about innovation in experience and constantly seek to push the boundaries of what is possible. You bring 8 to 12 years of experience, a strong commitment to personal development, and a desire to make a lasting impact. You will join a multicultural, international, and multidisciplinary team dedicated to advancing the frontiers of technology and design.