Back-End Developer / NodeJS

Join our dynamic team as a Back-End Developer specializing in NodeJS. You will be responsible for developing and maintaining high-performance server-side applications. Collaborate with our front-end developers to integrate user-facing elements with server-side logic. Your role will also involve optimizing applications for maximum speed and scalability.

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.

About the Role Meritis is looking for a C# Developer to join its team based in Paris. This role involves working closely with colleagues to build software solutions for a range of projects. What You'll Do Develop and maintain applications using C# Collaborate with other professionals to deliver project goals Contribute to the design and implementation of new features Location This position is based in Paris.

About the Role meritis is hiring a C# Developer (H/F) to join the team in Paris. This role offers the chance to work on a range of projects alongside colleagues who value collaboration and technical skill. What You Will Do Contribute to projects using C# and related technologies Work closely with team members to deliver solutions Bring ideas and technical insight to group discussions Who We’re Looking For Experience with C# development Interest in technology and problem-solving Comfort working in a collaborative setting This position is based in Paris.

About the Role Meritis is looking for a C# Developer (H/F) to join the team in Paris. This position plays a key part in designing and building software solutions, taking projects from initial idea through to deployment. What You Will Do Participate in the full software development lifecycle, including design, development, testing, and deployment Work closely with team members to deliver reliable and maintainable code Contribute ideas to improve software quality and team practices Location This role is based in Paris.

About the Role Meritis is hiring a C# Developer in Paris. This position involves designing, developing, and maintaining software solutions. Collaboration with colleagues from different teams is a key part of the job, with a focus on delivering reliable results.

About VoodooEstablished in 2013, Voodoo is a pioneering tech company dedicated to crafting captivating mobile games and applications aimed at entertaining audiences globally. With a dedicated team of 800 professionals, we have achieved remarkable success with over 7 billion downloads and 200 million active users, positioning us as the third-largest mobile publisher worldwide, trailing only Google and Meta. Our impressive portfolio features hit games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz.TeamOur Growth team is instrumental in unlocking the full potential of Voodoo's diverse products within our ecosystem. This dynamic team encompasses various areas of expertise, including user acquisition, ad monetization, video ads, playable ads, and influencer marketing. Joining the Growth Team at Voodoo demands a blend of operational excellence and creative thinking, enabling us to remain at the forefront of the industry.Within the Playable Ads team, our core mission is to design engaging and interactive advertising experiences that not only captivate users but also drive conversions. Collaborating closely with playable developers and coordinators, you will transform games into HTML interactive ad experiences, focusing on producing high-performance ads across our extensive network.

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!

At Shift Technology, we are at the forefront of the insurance industry's digital transformation through our cutting-edge AI platform. We leverage generative, agentic, and predictive AI to enhance underwriting, streamline claims, and combat fraud and risk, thereby promoting operational efficiency and delivering outstanding customer experiences with tangible business outcomes.Our diverse team, representing over 50 nationalities, thrives in a culture grounded in innovation, trust, and a shared mission to revolutionize insurance through our SaaS solutions.Our dynamic Engineering Team is pivotal to our value proposition. We tackle intricate challenges not just within our squads but also in collaboration with other teams across the organization. If you're passionate about addressing complex technical problems, this is the ideal environment for you! KEY RESPONSIBILITIES As a Fullstack Developer, your technical expertise and independence will empower you to design and implement comprehensive solutions for our applications and features.Craft intuitive user interfaces for data collection and review.Develop and maintain resilient APIs that facilitate automated decision-making.Write, test (from unit tests to end-to-end), and deliver clean, maintainable code.Engage in releases, deployments, and the monitoring of live solutions.Contribute to technical migrations, modernization initiatives, and architectural enhancements as our platforms evolve.Performance, scalability, and quality are crucial challenges to overcome in delivering and reviewing code. You will collaborate with teammates, including software engineers, data scientists, QA specialists, UX designers, and product managers, to provide and receive feedback and continuously enhance the agile development process.

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.

Join our innovative team at myjobcompany1 as a Full Stack Web Developer. In this role, you will be responsible for designing and implementing robust applications that improve user experience and meet business needs. You will work with both front-end and back-end technologies, ensuring seamless integration and performance.

About the Role Meritis is hiring a C# Developer (H/F) for its Paris office. This position offers the chance to work on a range of software projects alongside a skilled team.

Join alan as a Sales Learning & Development Specialist, where you'll play a critical role in shaping the future of our sales team. In this role, you will be responsible for designing and implementing innovative training programs that empower our sales professionals to excel. Your expertise in developing engaging learning experiences will help drive our sales strategy forward.We are looking for a dynamic individual who is passionate about developing talent and fostering a culture of continuous improvement within our sales organization. You will collaborate with cross-functional teams to identify training needs and create impactful learning solutions.

We are seeking a passionate and motivated Junior .NET Developer to join our dynamic team at myjobcompany1 in Paris. This is an excellent opportunity for those who are eager to grow their skills in software development within a collaborative environment. You will work on exciting projects, contribute to the development of innovative solutions, and gain invaluable experience in the tech industry.

About UsAt CryptoNext Security, we are pioneers in the realm of deep technology, focusing on post-quantum cryptography. Our innovative solutions empower businesses and institutions to safeguard their data against the impending challenges posed by quantum computing. We proudly collaborate with prominent clients across sectors such as finance, defense, and telecommunications.Your Daily ResponsibilitiesCraft and implement dynamic user interfaces utilizing React for our advanced post-quantum cryptography products.Work collaboratively with Product and Backend teams to deliver a seamless and user-friendly experience.Enhance performance while ensuring cross-browser and cross-device compatibility.Integrate REST APIs to facilitate interaction with backend services.Engage in code reviews and uphold best practices, including unit testing, continuous integration, and comprehensive documentation.Propose enhancements to frontend architecture through technological upgrades and refactoring.Foster improvements in our products beyond your typical responsibilities.Adhere to our frontend team principles: “Done over perfect” / we prioritize speed: KISS, DRY (Don't Repeat Yourself), SOLID.Essential SkillsProficient in React / Next.js along with its ecosystem (React Hooks, Context API).Solid understanding of TypeScript and fundamental programming principles.Experience with modern UI libraries such as Tailwind or chadcn/ui.Proven track record in integrating REST APIs.Strong knowledge of frontend performance optimization and related tools (Webpack, Vite, Core Web Vitals).Familiarity with frontend testing frameworks like Jest, React Testing Library, and Cypress.Competence in Git, CI/CD pipelines, and DevOps for automated integration and deployment.Desirable SkillsExperience with gRPC.Understanding of secure coding practices and application security.Basic knowledge of cryptography and cybersecurity.Experience in a startup or deeptech environment.Join Our TeamYou will become a key member of our R&D team, collaborating closely with backend developers, product managers, and UX/UI designers. You will report to the team lead and work with various departments to develop high-performance, user-centric interfaces that align with our clients' needs.Application ProcessInitial conversation with our HR team to discuss your background and motivations.Technical interview to assess your skills and fit for the role.

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.

Join our innovative team at Meritis as a JavaScript Developer (F/H) in the heart of Paris! We are looking for a passionate developer who thrives in a collaborative environment. You will work on cutting-edge projects, utilizing modern JavaScript frameworks to deliver high-quality software solutions.As a JavaScript Developer, you will be involved in the full software development lifecycle, from concept through to delivery and maintenance. If you are eager to learn and grow in your career, Meritis is the place for you!

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 Veepee, a leading pioneer in online flash sales since 2001, as a Business Intelligence Developer in Paris. You will play a vital role in connecting and empowering users with robust business intelligence solutions, primarily focusing on Strategy. As the first point of contact for our Business Analysts, you will identify their needs and challenges, proposing optimal solutions that drive data-driven decisions. Your responsibilities will include energizing the Business Analyst community through strategy training, guiding best practices, and ensuring effective use of our Data Warehouse built on Google Cloud Platform (GCP) with dbt. You will model and transform data flows for analysts, design and maintain REST APIs using Python and Flask, and uphold best practices in coding and automation. Collaborate with a dynamic international team of data professionals across Europe, ensuring quality, traceability, and workflow management in a fast-paced environment.

Join our dynamic team at myjobcompany1 as a Backend PHP Developer! We are on the lookout for a talented individual who is passionate about coding and eager to work on innovative projects. In this role, you will be responsible for developing and maintaining backend services, ensuring high performance and responsiveness to requests from the front-end.As part of our team, you will collaborate with front-end developers to integrate user-facing elements using server-side logic, and you will contribute to all phases of the software development lifecycle. We value creativity and technical expertise, and we encourage our team members to suggest improvements and new technologies.