React Engineer

About Air Apps Air Apps is a family-founded company focused on developing the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP). Since our start in 2018 in Lisbon, we have grown to operate in both Lisbon and San Francisco. Our apps have reached over 100 million downloads worldwide, all while remaining self-funded. We challenge standa…

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.

Blockchain.com is at the forefront of revolutionizing the financial landscape through cryptocurrency. As the leading and fastest-growing global crypto company, we empower millions of individuals around the globe to access cryptocurrency securely. Since our inception in 2011, we have gained the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.We are on the hunt for a talented Front-End Engineer with a passion for crypto and Web3 technologies to join our dynamic engineering team. In this role, you will work on developing innovative Blockchain applications that are among the most popular in the crypto ecosystem. Your contributions will shape user interfaces that power future wallets, block explorers, financial and market data products, along with cutting-edge visualizations.Our engineering teams engage in all phases of the product life cycle, encompassing idea generation, design, prototyping, planning, execution, and deployment.

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 Mission: We are dedicated to empowering SMEs to thrive in their business endeavors by providing Europe's premier finance workspace. Our platform integrates top-notch tools such as streamlined invoicing, effective spend management, and pre-accounting features, all backed by our dedicated 24/7 support team, ensuring that our clients navigate their financial responsibilities with ease.About Qonto: Founded in July 2017 by Alexandre and Steve, Qonto has quickly established itself as a trusted partner for over 600,000 customers. With a growing team of over 1,600 Qontoers, we proudly feature in the LinkedIn Top Companies ranking in France!Our Core Values:Customer focus | We prioritize our customers in all our endeavors.Ownership | We take responsibility for our roles and strive to achieve results.Teamwork | We simplify collaboration and support each other.Mastery | We constantly seek to improve and elevate standards.Integrity | We act ethically and with respect towards all individuals.Diversity & Inclusion: At Qonto, we are committed to creating an inclusive environment where everyone can succeed. We evaluate applicants based on their skills and potential, fostering diversity with 55% of our team being international, 44% women, and 20% parents. Join us in cultivating a workplace that values diversity and individuality.Learn about our commitment to a fair hiring process.⭐ Your Role:As a Fullstack Engineer, you will play a pivotal role in developing financial tools that empower over 600,000 SMEs to manage their finances efficiently. Collaborating closely with our Head of Engineering, Yanis, you will focus on creating impactful financial features that simplify processes for SMEs and accountants.‍‍ Responsibilities:• Feature Ownership: Take charge of features from conception to deployment, working closely with Product Managers to define technical specifications and deliver results.• Robust Tool Development: Design and implement scalable solutions for pre-accounting functionalities, ensuring a seamless user experience.

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.

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.

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.

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.

About Air Apps Air Apps began in Lisbon in 2018 as a family-founded company with a clear goal: build the world’s first AI-powered Personal & Entrepreneurial Resource Planner (PRP). Since then, the team has expanded to San Francisco and reached over 100 million downloads, all while staying self-funded. The company focuses on pushing boundaries in AI-driven solutions that help people plan, work, and live better. Team members play a direct role in shaping products that empower users worldwide. React Native Engineer , Role Overview Air Apps is growing its team in Paris and seeking a React Native Engineer to help build and maintain a suite of mobile applications. This role involves close collaboration with designers, product managers, and engineers to deliver seamless, high-quality user experiences. The work centers on delivering applications that meet high standards for both quality and usability. This posting is part of a talent pool initiative ahead of the official job launch. Interested candidates will be contacted when the position formally opens. Location and Relocation This is a fully onsite position based at the Lisbon office. Daily work happens in person with cross-functional teams. Relocation support is available for those moving to Lisbon.

nexton is looking for a Fullstack Java / React Developer based in Paris. This position centers on developing and refining applications using both Java and React. Collaboration with colleagues from various teams is a key part of the job, with a focus on creating user-friendly interfaces and enhancing the overall user experience. What you will do Design and build applications with Java and React Work alongside cross-functional teams to develop interfaces Offer ideas to improve usability and boost user satisfaction Requirements Experience with backend development in Java and frontend work in React Interest in tackling complex problems with creative solutions Ability to thrive in a collaborative and evolving environment

Join our dynamic team at Altersolutions as a Fullstack Developer specializing in .NET and React. In this role, you will leverage your expertise to build and enhance innovative web applications. Your contributions will be pivotal in delivering high-quality software solutions that meet the needs of our clients.

Rejoignez notre Pôle Transformation Numérique en tant que Développeur Fullstack, où vous ferez partie d'une équipe dynamique d'experts en développement de solutions logicielles, dédiée à l'accompagnement de nos clients.Vous serez intégré(e) au sein d'une équipe dédiée chez un leader du secteur de l'assurance, travaillant en mode squad avec des développeurs, testeurs et un Product Owner.Vos responsabilités incluront :Concevoir, développer et maintenir des applications web performantes et évolutives.Créer des APIs REST sécurisées en .NET/C#.Développer des interfaces utilisateurs modernes et intuitives utilisant ReactJS / TypeScript.Collaborer étroitement avec l’équipe produit et les designers pour transformer les exigences en solutions techniques.Assurer la qualité du code à travers des tests unitaires, des revues de code et des pratiques CI/CD.Participer aux choix techniques et à l’architecture du logiciel.Contribuer à l’amélioration continue et au partage de connaissances au sein de l’équipe.

Join nexton, a leading company in the Telco Media Transport sector, as a skilled Java / React Developer. In this role, you will leverage your expertise to develop and maintain robust applications, collaborate with cross-functional teams, and contribute to innovative solutions that enhance user experiences.

Join Altersolutions as a talented .Net / React JS Developer and take your career to the next level! We are seeking an individual with a strong background in .Net and React JS to contribute to exciting projects in a dynamic environment. You will collaborate with a team of professionals dedicated to delivering high-quality software solutions.

Join our dynamic team at Alten as a Fullstack Java / React Developer (H/F). We are looking for passionate developers who thrive in innovative environments and are eager to work on exciting projects that push the boundaries of technology.

UpSlide is the leading productivity and branding solution for financial services. Our innovative software significantly enhances the functionalities of PowerPoint, Word, Excel, and Power BI, enabling users from prestigious firms such as Citi, KPMG, and BNP Paribas to focus on high-value tasks rather than formatting or manual data entry. With over 160 employees, we are in a growth phase, with offices located in Paris (headquarters), London, New York, Singapore, and Berlin.Our Core Values Our values guide our approach to work and are central to our recruitment process. We seek individuals who resonate with the following principles:Excellence: Every detail matters, and we prioritize the quality of our deliverables.Trust: We are passionate, committed, and empowered to act autonomously.Well-being at Work: We maintain a positive outlook and share our enthusiasm with colleagues and clients alike.The Team ‍‍You will join the UpSlide development team, currently composed of 26 developers organized into 5 squads. Our missions for 2026 include:OfficeJS: Preparing UpSlide for the transition from Microsoft Office to Office JS.FA: Enhancing our product's superiority in the Financial Advisory sector.FA & AI: Strengthening our product's edge in Financial Advisory by focusing on AI-related solutions.IB & AM: Continuously improving our offerings for Investment Banking & Asset Management.Platform: Upgrading our infrastructure to support tenfold user growth.Join Us!

Join our dynamic team at Nexton as a Front-End React Developer! We are seeking a skilled developer who is passionate about creating exceptional user experiences and utilizing modern web technologies. You will be responsible for designing and implementing user interfaces using React, collaborating with cross-functional teams to deliver high-quality solutions.

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.

Role Overview Sopra Steria is seeking a Tech Lead with expertise in Fullstack Java and React for its Financial Services practice in Paris. This role guides a team of developers, shaping software solutions that support client objectives and business needs. Main Responsibilities Lead and coordinate a team of developers on fullstack Java and React projects Mentor junior team members and support their technical growth Work closely with cross-functional teams to deliver efficient, reliable software Promote best practices in coding standards and project management Contribute to the delivery of high-quality solutions for financial services clients What We Look For Significant experience with Java and React in a fullstack environment Strong leadership and team coordination skills Ability to mentor and guide junior developers Experience collaborating with diverse technical and business teams Location Paris, France