React Engineer

Your Impact Join Doctolib, a rapidly expanding healthcare technology platform, as we seek talented Frontend Software Engineers in Paris. We welcome developers at all stages of their careers, from newcomers to seasoned professionals, to join our innovative Engineering teams! As a Frontend Software Engineer, your role will be crucial in enhancing Doctolib's mission to provide high-quality products that benefit both patients and healthcare professionals. Your contributions will help solidify our position as a leader in the healthcare technology sector. Your key responsibilities will include: Collaborating with product managers, designers, and fellow engineers to develop features that provide real value to our users. Designing, developing, and maintaining React and TypeScript components while adhering to performance, accessibility, and scalability standards. Enhancing code quality through thorough testing, meticulous documentation, and constructive code reviews. Sharing your expertise and working collaboratively across teams to continuously advance Doctolib's frontend architecture. Life at Doctolib Tech Our solutions are built on a fully cloud-native platform that caters to both web and mobile applications, supports multiple languages, and is tailored to various healthcare specialties. Our technology stack includes Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native. We ethically leverage AI across our products to empower patients and health professionals. Learn more about our AI vision here. Curious about our tech culture and working environment? Visit the Doctolib Tech site.

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.

Join our dynamic team at believe as a Senior Software Engineer. In this pivotal role, you will leverage your expertise in React and Java to design and implement innovative software solutions that enhance our platform and improve user experience.Your contributions will be vital in driving our projects forward and ensuring the effective delivery of high-quality software. We are looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges.

believe is hiring a Senior Software Engineer with a focus on React and Java for its Paris office. This role centers on creating web applications that deliver effective user experiences. Key responsibilities Design and build web applications using React and Java Collaborate with colleagues across different teams to understand requirements and deliver solutions Support ongoing enhancements to software products Location This position is based in Paris.

Join us as a Frontend Engineer specializing in TypeScript and React at connecthum, an innovative AI infrastructure startup dedicated to developing advanced solutions for the safety and management of large-scale AI systems.About connecthum:A pioneering AI-native product company focused on AI safety and infrastructure.Supported by a diverse group of international investors.Expertly handling large volumes of AI traffic within enterprise environments.Creating and optimizing proprietary models for enhanced performance and reliability.A compact, highly skilled team committed to rapid delivery.Our mission is to develop a robust control and evaluation framework for AI systems, empowering organizations to define, test, and regulate AI behaviors in real-world contexts.Your Contributions:Take ownership of and deliver comprehensive product features across the frontend and full stack.Craft user-friendly, high-quality UX designs that simplify complex AI workflows.Develop seamless product flows, from initial onboarding to advanced analytical capabilities.Work collaboratively with founders, product managers, designers, machine learning experts, and researchers.Translate state-of-the-art AI functionalities into dependable user-centric tools.Lead the product development lifecycle while shaping technical direction and product strategies.This hands-on position lies at the intersection of product development, AI, and engineering.Technical Environment:Proficient in TypeScript, React, and Next.js.Utilizing Tailwind CSS for design systems.Integrating with LLM APIs (OpenAI API, function calling, context orchestration).Creating data visualization and analysis interfaces.Building full-stack product architecture.Ensuring effective production deployment and system observability.Your Skills:Demonstrated expertise in TypeScript, React, and Next.js.Experience in developing product features from concept to deployment.Comfortable working with LLM APIs and navigating AI product workflows.Proven ability to collaborate with multidisciplinary teams.

Join our dynamic team at believe as a Senior Fullstack Software Engineer, specializing in PHP and React. In this role, you will be responsible for designing, developing, and maintaining innovative software applications that enhance user experiences and drive business success. Your expertise will contribute significantly to our projects, ensuring high-quality software delivery.

Join the dynamic technical teams at iad Business Factory as a Frontend Software Engineer under the guidance of an Engineering Manager. You will collaborate with a diverse group of developers, Product Owners, Project Managers, Quality Assurance professionals, and designers, all dedicated to enhancing our Playiad application.Your role will encompass developing new web-oriented projects as well as evolving and maintaining existing features, all while adhering to a philosophy of continuous product improvement. Your primary responsibilities will include:Implementing solutions based on guidelines established by the technical leadership (Clean Architecture, Test-Driven Development, Domain-Driven Design, Behavior-Driven Development, etc.),Understanding the business needs of each user story (product culture),Ensuring high-quality code through test-driven development practices,Engaging in self-directed learning through continuous monitoring of technologies and best practices,Adopting a pragmatic and straightforward approach to development,Collaborating effectively with team members within your product family,Ensuring the reliability of applications in production with a 'You build it, you run it' ethos,Following principles of software craftsmanship and Extreme Programming (XP). Technical Stack:Development: Vue3, Tailwind, VueQuery, Vitest, Composable, TypeScript, VeeValidate, StoryBook, PNPM, Vite, Figma, VuePress, PHP 7/8, Symfony 4/6Databases: PostgreSQL, MySQLGitflow: Trunk-basedInfrastructure as Code: Terraform, AnsibleAWS Services: EC2/ECS, RDS/Aurora, Lambda/Step Functions, API GatewayMessaging Systems: RabbitMQ, AWS SQS, SNSLinux Environment: Shell scripting, Cron jobs, etc.CI/CD Tools: GitHub, Docker, GitHub Actions, Jira, Confluence

Join Aircall, a groundbreaking unicorn in the realm of AI-driven customer communication platforms, utilized by over 22,000 companies globally. Our mission is to transform customer interactions by integrating voice, SMS, WhatsApp, and AI into a singular, efficient workspace.Our progress stems from a core belief: empower teams to operate smarter, not harder. With innovations like Aircall’s AI Voice Agent automating routine calls, AI Assist optimizing post-call processes, and AI Assist Pro providing real-time support, we enhance productivity, drive revenue, and enable teams to scale confidently.Headquartered in Paris, our European hub, we also boast a robust North American presence in Seattle, complemented by teams in Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product is beloved by customers, our business is rapidly expanding, and we are backed by leading investors, driving swift AI advancements across various product lines.Our Work Culture: We prioritize customer satisfaction, leverage data-driven insights, and aim for impactful results. We value ownership, continuous learning, and deliberate speed. If you thrive in a collaborative, dynamic environment where trust and impact are paramount, you will fit right in.We are seeking a dedicated and enthusiastic Senior Software Engineer to enhance our Workspace team, with a primary focus on Frontend Architecture.In this role, you will be pivotal in transforming Aircall's frontend architecture into a robust platform. Our existing monorepo contains approximately 40 packages and various applications, and as we expand, it is crucial to facilitate parallel contributions from diverse feature teams without generating bottlenecks or architectural conflicts. Your mission is to design a seamless, secure, and high-performing architecture that fosters collaboration.You will serve as a catalyst for the entire engineering organization, establishing the standards for how frontend code is authored, shared, and deployed at Aircall.

Join our innovative team at dust as a Frontend Software Engineer, where you will play a key role in developing cutting-edge web applications that enhance user experiences. You will collaborate with designers and backend engineers to create seamless, responsive interfaces that delight our users.

Join Our Innovative TeamBecome a pivotal member of the Healthcare Access stream within the Patient Domain at Doctolib. This stream is essential to our product, guiding patients through their entire journey to accessing care, from finding the right practitioner to booking their appointment and beyond.Our teams are addressing some of the most compelling and impactful challenges in digital health: enhancing search and discovery experiences to enable patients to find the right care faster, developing seamless appointment booking processes that function effectively at scale, designing a delightful and dependable patient app experience, and broadening access to healthcare for new users and diverse use cases across Europe.As a Staff Engineer in this stream, your contributions will directly influence the interfaces and systems utilized by millions of patients daily. Here, web performance, frontend architecture, and user experience are not mere engineering considerations; they are integral to how individuals access their health.

At Algolia, we are at the forefront of AI-powered search technology, enabling over 17,000 businesses to deliver rapid and predictive search experiences at scale. Each week, we process more than 30 billion search queries — surpassing the combined total of Microsoft Bing, Yahoo, Baidu, Yandex, and DuckDuckGo.In 2021, we secured $150 million in Series D funding, elevating our valuation to an impressive $2.25 billion. This strong financial foundation allows us to continuously enhance our market-leading platform, serving incredible clients such as Under Armour, PetSmart, Stripe, Gymshark, and Walgreens.The TeamThe Frontend Experiences (FX) team is dedicated to inspiring and empowering Algolia users in crafting exceptional UI experiences powered by Algolia. We envision, develop, and decompose advanced UI experiences into modular elements ready for integration into our users' applications. Our suite of UI libraries, including Autocomplete, is widely utilized, even appearing in the Tailwind and React documentation. Additionally, we maintain the InstantSearch library platform, unlocking complex and modern search and discovery applications.Our approach is framework-agnostic; we utilize various frameworks, including Vue.js and React, as well as plain JavaScript (Vanilla JS). We prioritize quality, writing specifications for every feature we release. Our codebase is in TypeScript, fully open-source, and thoroughly tested.Beyond frontend development, we also handle specific backend functionalities that enhance our user experiences, utilizing TypeScript, Go, and Python.The OpportunityWe are seeking a Full-Stack Engineer to join our Frontend Experiences (FX) team at Algolia. In this role, you will significantly influence the design and functionality of Algolia-powered user interfaces. You will assist customers in reimagining the future of how people search for and discover information. Your contributions will be crucial in architecting our platform, which serves as the face of Algolia’s Developer Experience.Your responsibilities will include:Architecting, designing, and developing new iterations of the InstantSearch platform, alongside our open-source libraries and backend APIs.Designing and implementing features that utilize agentic patterns within the Algolia platform and our open-source libraries.Developing new features, troubleshooting issues, and analyzing user feedback for our well-regarded open-source projects.Collaborating with product, design, and marketing teams on the rollout of new projects and websites.Taking ownership of projects, researching, exploring, and delivering innovative experiences.Sharing your expertise to enhance our understanding and improve search and discovery capabilities.

About Mistral AIAt Mistral AI, we harness the transformative power of artificial intelligence to streamline processes, enhance productivity, and foster creativity. Our cutting-edge technology integrates effortlessly into everyday workflows, revolutionizing the way we work.We are committed to democratizing AI through state-of-the-art, high-performance, open-source models and solutions tailored for enterprise needs, whether on-premises or in the cloud. Our flagship product, le Chat, serves as a versatile AI assistant designed for both personal and professional use.Our dynamic team thrives on collaboration, fueled by a shared passion for AI's potential to create positive societal change. With a diverse workforce distributed across France, the USA, the UK, Germany, and Singapore, we foster a culture of innovation, creativity, and teamwork.Join us in shaping the future of AI and making a meaningful impact in the world. Explore more about our inclusive culture at https://mistral.ai/careers.Position OverviewWe are on the lookout for a talented and enthusiastic Senior Frontend Software Engineer to enhance our innovative team. In this role, you will have the opportunity to work across our diverse product suite, contributing to its ongoing development and improvement. Your contributions will play a crucial role in elevating the user experience, making it more engaging, efficient, and user-friendly.Key Responsibilities• Full Stack Development: Design, develop, and maintain scalable features, ensuring seamless interaction between front-end and back-end systems using a modern tech stack.• User-Centric Design: Focus on optimizing user experience to ensure our products align with user needs and expectations.• Code Quality: Produce clean, maintainable, and well-documented code, actively participating in code reviews to uphold our high quality standards.• Collaboration: Engage closely with cross-functional teams, including product managers, designers, and fellow engineers, to deliver exceptional software solutions.

Join Our Team as a Staff Mobile Engineer - React NativeAt Doctolib, we are seeking a talented Staff Mobile Engineer with profound knowledge in React Native to become a part of our innovative Patient domain.In this pivotal role, you will help us transform the Doctolib mobile app into a comprehensive AI-powered health companion, enabling individuals to lead healthier lives. Your contributions will be vital in enhancing the quality, user experience, and overall depth of our mobile application while establishing solid technical foundations for mobile development within our team.As a member of the tech team at Doctolib, you will be at the forefront of developing groundbreaking products and features that enhance the daily routines of care teams and patients alike. Our dynamic environment emphasizes collaboration among product, design, and business teams in agile feature teams.Your responsibilities will include:Defining and refining mobile architecture patterns and technical standards for the patient domain.Championing technical excellence in mobile development, ensuring the highest code quality and adherence to best practices.Collaborating on the technical roadmap and guiding architectural decisions for the mobile platform.Mentoring and supporting mobile engineers in developing robust and scalable solutions.Leading by example in building features that significantly enhance user experience and app performance.

Your Impact At Doctolib, we are rapidly expanding our team and currently seeking talented Fullstack Software Engineers to join us in Paris. We welcome engineers at various stages of their careers, whether you are just starting out or have years of experience under your belt. There’s a place for you in our innovative Engineering teams! Your mission is to help Doctolib solidify its standing as a premier healthcare technology platform by creating high-quality products that enhance the daily routines of healthcare professionals and patients. You will engage in feature teams that develop solutions with a direct impact on millions across Europe. Joining the tech team at Doctolib means you will be at the forefront of building cutting-edge products and functionalities that improve the lives of care teams and patients alike. What You’ll Build Your responsibilities will encompass, but are not limited to: Collaborating with product managers, designers, and fellow engineers to create features that provide real value to healthcare professionals and patients. Designing and implementing technical solutions that ensure optimal performance, security, and usability across our fullstack applications (React, TypeScript, JVM ecosystem). Contributing to code quality through thorough reviews, testing, and the continuous improvement of our development practices. Sharing your expertise and collaborating across teams to advance Doctolib’s architecture and technical standards. Life at Doctolib Tech Our solutions are built on a single fully cloud-native platform that supports web and mobile application interfaces, multiple languages, and is tailored to meet the requirements of various countries and healthcare specialties. Our technology stack includes Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native. We ethically leverage AI across our products to empower both patients and health professionals. Learn more about our AI vision here. Interested in understanding more about our tech culture and environment? Visit the Doctolib Tech site. What You’ll Bring Before proceeding, if you feel that this job description resonates with your skill set even if you don’t meet every criterion, we encourage you to apply! You possess fullstack software engineering experience with React and the JVM ecosystem (Java, Kotlin, Spring Boot) - Ruby experience is a bonus. You have a user-first mindset and are dedicated to enhancing the user experience.

JOIN OUR TEAMWith nearly 40 members across various disciplines including Backend, Frontend, iOS, Android, DevOps, Product, UX/UI, and QA, our Tech team at Cheerz is committed to developing, testing, and deploying features that engage hundreds of thousands of users throughout Europe. Our apps and website allow customers to customize their photo products, creating unique, personalized, and memorable keepsakes.The development team operates across four platforms: backend, web, iOS, and Android, each ensuring technical integrity. Developers work within autonomous, multidisciplinary agile squads.As an Engineering Manager for Frontend Web at Cheerz, you will report directly to the CTO. You will lead a team of web developers and be part of the "Product Trio" within a squad, collaborating closely with Product Managers and Product Designers.You will thrive in a collaborative environment where bridging expertise is essential: you will connect developers, especially with Staff Engineers, the Product team, and other stakeholders at Cheerz. Your input will be vital in making strategic decisions that influence your domain and help shape Cheerz's engineering culture.Your key responsibilities will include:Technical Excellence and Vision- Ensure software quality and scalability of your area of expertise. Facilitate the adoption of best practices, standards, and architectural decisions.- Collaborate with Staff Engineers and the CTO to co-develop the technical roadmap.- Identify and lead major technical initiatives (architecture redesign, technical debt reduction, performance optimization).- Support change management and resolve resistance issues.Management and Delivery- Co-manage with the Product Trio the delivery of features and product initiatives.- Plan sprints and prioritize the technical roadmap.- Allocate resources and track project progress.- Maximize team efficiency and foster a positive work culture.

Doctolib is looking for a Senior Software Engineer to join the team behind the 'Book Your Practitioner' platform in Paris. This group focuses on building tools that help patients and healthcare professionals connect more easily. Role overview This position centers on improving the experience of booking healthcare appointments. The work directly affects how patients find and schedule visits, as well as how practitioners manage those appointments. What you will do Enhance the user experience for scheduling healthcare appointments Design and build new software features to support both patients and practitioners Collaborate with fellow engineers to deliver solutions that are both reliable and scalable Contribute to projects that shape access to healthcare Requirements Solid experience as a software engineer, especially with complex systems Interest in working on products that impact people's lives Enjoyment of problem-solving within a collaborative team This role is based in Paris, France.

Join our innovative team that is transforming the future of global living.At The Flex, we envision a world where renting a home is instant, intelligent, and seamless—much like booking a ride. Our mission is ambitious: to empower anyone to live anywhere, anytime, without hassle.Driven by Base360.ai, our unique automation engine, we are crafting the operating system for modern renting—integrating property data, streamlining operations, and facilitating smooth stays across continents.If you are passionate about complex systems, automation, and developing software that has real-world applications, this position offers you the opportunity to take ownership and make a significant impact. What You'll CreateAs a Senior Software Engineer, you will design, develop, and scale essential components of The Flex platform—from core services and APIs to automation workflows and real-time systems.You will work with considerable autonomy, managing problems from start to finish and directly influencing architectural decisions while remaining deeply engaged with production code.This role is for engineers who prioritize impact over meetings and take pride in constructing systems that are reliable, elegant, and scalable. Your ObjectivesDevelop Core SystemsCreate and maintain scalable services that enhance bookings, payments, availability, pricing, and guest experiences.Design Robust APIsEstablish clean, well-structured APIs that connect Base360.ai with internal tools and external partners.Automate OperationsConstruct event-driven workflows that eradicate manual tasks and unlock operational efficiencies.Deploy with AssuranceImplement and manage cloud-native infrastructure on AWS with an emphasis on reliability, security, and performance.Tackle Meaningful ChallengesEngage in real-time booking synchronization, pricing intelligence, keyless access systems, AI-driven alerts, and live operational dashboards.Collaborate for SuccessPartner closely with product, data, and operations teams to transform complex requirements into straightforward, effective systems. Ideal Candidate ProfileExtensive experience in building production systems with Node.js, React, and AWS.Solid understanding of software design principles and best practices.Proficient with CI/CD practices and tools.Strong communication skills and a collaborative mindset.

Join Altersolutions as a Tech Lead specializing in React to lead innovative projects from conception through execution. You will be responsible for guiding a talented team of developers, ensuring best practices in coding and design, and delivering high-quality software solutions. Your role will involve collaborating with cross-functional teams, mentoring junior developers, and driving the technical vision of our projects.

Join Aircall, a leading AI-enhanced customer communications platform, trusted by over 22,000 companies globally to boost revenue, expedite issue resolution, and expand customer-facing teams. We are revolutionizing customer communications by seamlessly integrating voice, SMS, WhatsApp, and AI into one cohesive workspace.Our growth is driven by a straightforward philosophy: empower teams to work smarter, not harder. With our AI Voice Agent automating routine calls, AI Assist streamlining post-call tasks, and AI Assist Pro providing real-time guidance, we enable individuals to perform at their best. The outcome? Increased revenue, quicker resolutions, and scalable teams operating with confidence.Headquartered in Paris, with a robust North American presence in Seattle and teams across various cities including Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City, Aircall has developed a product that delights customers and a rapidly scaling business, bolstered by exceptional investors and driven by swift AI advancements across multiple product lines.At Aircall, you will be part of a dynamic, ambitious, and product-oriented company where execution matters. We make impactful decisions quickly and foster genuine growth.Our Work Culture: We prioritize customer satisfaction, leverage data for informed decisions, and aim for substantial outcomes. We value ownership, continuous learning, and thoughtful acceleration. If you excel in a collaborative, fast-paced environment where trust and impact are paramount, you will thrive here.We are seeking an enthusiastic and dedicated Frontend Engineer to join our expanding Engineering Team, specifically within our Workspace team.In this role, you will take charge of the design, development, and deployment of Aircall’s flagship products: Aircall Workspace and Aircall Dashboard. These 100% frontend products are the primary interface for our customers, where performance and user experience are critical.Our delivery processes are driven by quality, excellence, and agility. You will contribute to maintaining these high standards by writing robust, maintainable code and participating in our continuous improvement initiatives.Leveraging React and TypeScript, we create valuable and resilient services that are fully integrated with our customers' business processes.