Staff Fullstack Engineer

Join Outsight, a leader in spatial intelligence, where our innovative software solutions leverage 3D LiDAR data to monitor and enhance the movement of people and vehicles. Our technology empowers operators at transportation hubs—including airports, train stations, sports venues, and industrial sites—to access precise, anonymous spatial data, aimed at improving operational efficiency, safety, and user experience. Our diverse team of scientists and engineers collaborates across international locations, including Paris, San Francisco, Sophia-Antipolis, and Hong Kong, with a commercial office in Spain to support our global initiatives. Discover more about our mission and solutions at Insights about Outsight. Our Passenger Flow Traffic Monitoring solution is utilized by premier airports and train stations globally, known for their operational excellence and exceptional passenger experiences. We also serve various sectors, including tourism, retail, and sports. Additionally, our Car Traffic Remote Monitoring solution is trusted by top-tier clients, including BMW. Position Overview We are seeking a Senior FullStack Engineer to join our Platform Engineering team. Reporting to the Director of Engineering, you will play a pivotal role in developing our Shift cloud platform product, employing a multi-tenant, multi-region strategy. Your expertise will be vital in building foundational services that govern tenant lifecycle, identity, security, and overall management console web application.

Join Aircall, a revolutionary unicorn in the realm of AI-driven customer communication solutions, utilized by over 22,000 enterprises globally to enhance revenue, expedite issue resolution, and scale customer-facing teams. We are transforming customer interactions by unifying voice, SMS, WhatsApp, and AI into a singular, efficient workspace.Our growth stems from a straightforward philosophy: empower teams to work smarter, not harder. Our AI Voice Agent automates routine calls, AI Assist simplifies post-call tasks, and AI Assist Pro provides real-time support, enabling teams to excel. The outcome is enhanced revenue, quicker resolutions, and teams that grow confidently.Headquartered in Paris, with a robust North American presence in Seattle, Aircall has teams located throughout Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product has garnered immense customer appreciation, and our business is rapidly scaling, bolstered by top-tier investors and driven by swift AI advancements across various product lines.At Aircall, you will be part of a dynamic and ambitious organization. We prioritize product innovation, execution, and making a tangible impact through rapid decision-making and genuine growth.Our Work Culture at Aircall: We are dedicated to our customers, guided by data, and focused on achieving significant results. We value ownership, continuous improvement, and thoughtful speed. If you excel in a collaborative, fast-paced environment where trust and impact are paramount, you will thrive here.We seek a dedicated and enthusiastic Senior Software Engineer to become a vital part of our expanding Communication Platform department, specifically within the Number Management team. You will take charge of designing, developing, deploying, and maintaining business-critical features that bring significant value to our customers.Your daily responsibilities will include advocating for best practices, mentoring team members, and enhancing engineering standards across the organization.Our commitment to quality, excellence, and agility drives our delivery processes, and your role will be pivotal in elevating these standards.You will be working primarily with TypeScript and Ruby, ensuring that our solutions meet the highest standards.

Join Our Team as a Senior Fullstack EngineerAt Capi, we empower businesses in emerging markets to efficiently pay their international suppliers in a straightforward, rapid, and equitable manner.With over $18 million in backing from esteemed investors such as Creandum, Y Combinator, General Catalyst, and notable angel investors from Revolut, Checkout, Stripe, and Remitly, we are committed to constructing the financial infrastructure that emerging markets truly deserve.By streamlining global trade, we enable local businesses to flourish, create more jobs, and drive prosperity within their communities.Our mission is to enhance GDP in emerging markets by making the global financial system more equitable and accessible. We address the challenges of global trade, simplifying the payment process for importers dealing with international suppliers. Our platform is designed to facilitate rapid business expansion, job creation, and serve as a catalyst for the prosperity of their nations.Our diverse team consists of approximately 80 individuals from 10 countries; we are a driven and ambitious group dedicated to making a significant impact in the world. We are excited to welcome more passionate individuals to our team!Explore Capi’s mission & values.Role OverviewYou will become part of a small, high-performing team of engineers and product leaders, influencing the scaling of our platform and increasing our impact.From day one, you will collaborate closely with the founding team based in London and Paris to shape our product vision and the various components of our technical architecture. As we expand our products and strengthen our presence in emerging markets, you will play a pivotal role in developing technology that addresses customer challenges.To succeed, you should possess empathy and curiosity to uncover the root of issues, along with the creativity to devise solutions that balance impact, effort, and user satisfaction.

Are you a passionate Fullstack Engineer looking to make an impact? Join Doctrine as a Senior Fullstack Engineer in our dynamic Squad Scribe, where you will lead innovative projects and collaborate with a talented team. You will work on designing, developing, and implementing user-friendly applications that enhance our client's experience.

Join our innovative team at jobsforhumanity as a Mid/Senior Fullstack Engineer. In this role, you will be responsible for developing and maintaining robust web applications that deliver exceptional user experiences. Your expertise in both front-end and back-end technologies will play a crucial role in the success of our projects.

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 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.

At Joko, we empower consumers to shop smarter. Our mission is to transform the shopping experience, enabling individuals to discover exactly what they need, make informed choices, and save money.Established in Paris, Joko is a certified B Corp tech company with a diverse team of over 90 talented individuals across Paris, Barcelona, New York, and beyond. More than 5 million users benefit from our services daily at over 10,000 merchants.From cashback and automatic coupons to price alerts and carbon tracking, we continuously enhance our offerings to make shopping more intelligent. Currently, we are developing an AI-driven shopping assistant to help users identify the best products based on price, quality, and sustainability.With profitability achieved in our core market, we are now focused on scaling our operations globally, particularly in the United States.Join us on this exciting journey and help shape the future of shopping! Our Engineering TeamOur Engineering team thrives on tackling advanced technical challenges with innovative solutions. Committed to product innovation and design, they are defining the future of the shopping experience. Their goal is to positively influence the daily lives of millions of users around the globe.Software Engineers collaborate closely with the Product team, engaging in exploration, design, roadmap prioritization, implementation, and production deployment. We’ve seen that teams with engineers who have diverse skills and foster close collaboration with product teams can deliver exceptional and innovative user experiences.As our Engineering team expands rapidly, we are dedicated to innovating across all areas of our product and tech stack, empowering a revolution in online shopping. Your ResponsibilitiesAs we scale to over half a million active daily users with zero-downtime expectations, you, as our Senior Staff Platform Engineer, will spearhead and shape our platform initiatives. You will be our pioneering senior engineer in this domain, consolidating current efforts across the team into a structured, reliable, and high-impact platform that accelerates safe shipping.Infrastructure: Enhance our production infrastructure to ensure it is scalable and resilient, focusing on runtime reliability, capacity, and failure management, allowing us to grow swiftly while maintaining stability.Monitoring & Alerting: Develop top-tier observability systems to ensure proactive monitoring and alerting, significantly enhancing our operational capabilities.

About TeadsTeads is a premier omnichannel advertising platform dedicated to delivering impactful results for brand and performance advertisers across multiple screens. We prioritize significant business outcomes by harnessing predictive AI technology to seamlessly connect high-quality media, stunning brand creative, and contextually relevant addressability and measurement. Teads collaborates directly with over 10,000 publishers and 20,000 advertisers worldwide. Our headquarters are located in New York, with a global workforce of around 1,700 individuals across more than 30 countries.For further details, visit www.teads.com.Our Main Engineering Challenges at TeadsDevelop efficient and user-friendly web products utilized by thousands of users from the world's top publishers, advertisers, and agencies.Leverage a rich and diverse tech stack and system architecture to enhance performance, scalability, resilience, and cost efficiency, primarily using Scala and TypeScript.Operate in a high-traffic environment (2.2 billion users monthly, 100 billion events daily) with stringent low latency and high availability requirements (2 million requests per second, responses under 150 milliseconds).Manage large datasets with millisecond access times to compute a near real-time complex auction resolution algorithm (18 million predictions per second).Thrive in a fast-paced environment where we regularly collaborate with Product teams and adapt our Cloud infrastructure for new features and enhancements.

The AI Platform is at the forefront of Datadog’s AI initiatives, encompassing everything from cutting-edge distributed training infrastructure for our state-of-the-art models to the essential frameworks that power Bits AI and LLMObs. We are on a mission to enhance our offerings beyond just model creation, focusing on the development of tools that will empower engineers to deploy production-ready generative AI systems. This includes creating retrieval-augmented pipelines, autonomous agents, and comprehensive evaluation harnesses.We are seeking a Senior Software Engineer to architect and develop this next-generation platform. You will collaborate closely with the Applied AI, product, and core infrastructure teams to deliver:Large-scale experimentation, training, deployment, and monitoring solutionsDeveloper toolchains tailored for agents and other generative AI applicationsLow-latency serving infrastructure that seamlessly integrates AI features into all Datadog productsAt Datadog, we value a vibrant office culture that fosters relationships, sparks creativity, and encourages collaboration. We operate in a hybrid work environment, allowing our employees to achieve a work-life balance that suits their individual needs.

Join Wavestone as a Senior Consultant or Manager in our Platform Engineering, SRE & DevOps practice. In this role, you will leverage your expertise to guide clients in implementing state-of-the-art DevOps processes and ensuring high availability of their systems. You will work collaboratively with cross-functional teams to deliver innovative solutions that drive operational excellence.

Join Theodo: Pioneers in Digital SolutionsSince 2009, Theodo has been at the forefront of innovation, helping businesses design, develop, and deploy ingenious digital products by leveraging the best technology and Lean methodologies.With exceptional growth over the past 15 years, Theodo now boasts a talented team of over 700 professionals, primarily composed of passionate Software Engineers dedicated to continuous improvement. Our growth has led to specialized entities within the group focusing on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Heathtech, Consumer Products). By 2025, Theodo aims to generate 100M€ in revenue.At Theodo FinTech, our mission is to enhance the usefulness of finance for individuals, businesses, and society. We partner with major corporations, ScaleUps, and StartUps within the financial services sector to design, develop, and maintain accessible, sustainable, and socially beneficial digital products.As experts in financial services technology, Theodo FinTech delivers exceptional digital products at lightning speed with zero bugs and high security. Our team excels at integrating APIs from all B2B fintech platforms to create innovative embedded finance solutions.Your Responsibilities:As a Senior Full-Stack Software Engineer at Theodo FinTech, your role will involve:- Rapidly coding without bugs, utilizing coding assistants (Copilot, Cursor, Windsurf).- Designing features by contributing product ideas and identifying optimal technical strategies, while adhering to our delivery practices.

Join Verso, where we are revolutionizing consumer insights with our Consumer Intelligence OS. Our innovative AI-driven platform transforms traditional qualitative research methods by continuously analyzing consumer conversations at scale. Rather than relying on one-off studies, our clients gain a structured and ongoing understanding of their customers.Our mission is to embed consumer insights into every product and marketing decision, creating a real-time, always-on system. We are currently starting with AI-moderated interviews, but our long-term vision is to develop a comprehensive system for consumer understanding powered by dynamic workflows.Backed by Hexa (eFounders), we are building on the success of companies like Aircall, Front, Spendesk, Yousign, and many more.Our founding team brings deep expertise in strategy, technology, and entrepreneurship:Lydia - CEO: HEC graduate with 7 years at BCG (Principal), expert in strategy and consumer goods.Camille - CTO: Dual degree from X/HEC, former lead at CO2 AI, specialized in AI and scalable product development.

Making preventive health the default for every human in EuropeThe missionAt Lucis, we are dedicated to transforming healthcare from a reactive model to a preventive one. Our goal is to develop an operating system for human longevity, empowering individuals to extend their healthy years. Discover more about our vision and values here.The roleOur team has successfully processed over 200,000 clinical tests across four countries and is experiencing a growth rate of 10% week over week. We are still in the early stages of our journey.We seek engineers who focus on building comprehensive systems rather than just features. You will take ownership of outcomes from start to finish, leveraging AI to enhance processes and elevate the standards around you.Your work will not be limited to writing boilerplate code; you will create specifications for agents, critically review AI-generated code, and make impactful decisions that build upon themselves over time. This is the modern landscape of engineering—if this resonates with you, we invite you to continue reading.Together, we will define the scope of your role—whether it be mobile, infrastructure, platform, AI, or full-stack—based on your strengths and our needs.What you could own:Full-stack vertical ownership: Manage everything from data models to APIs and user interfaces, ensuring they are production-ready.Algorithms: Collaborate with our medical advisors to convert clinical science into reproducible, auditable code.System architecture: Design a scalable, HDS-compliant infrastructure on AWS (using CDK/Terraform) capable of handling ten times the current load without requiring rework. Ensure strict adherence to HDS and GDPR regulations with robust security practices.Engineering culture: Facilitate team rituals, maintain high standards, and mentor through code reviews and specification assessments.Lead engineering rituals and foster continuous improvement through Agile methodologies and cross-team collaboration, ensuring the team remains at the forefront of excellence.About youYou are passionate...

Dataiku is your go-to platform for AI success, providing an enterprise orchestration layer for building, deploying, and managing AI applications. In a unified environment, teams can design and operate analytics, machine learning, and AI agents while ensuring the transparency, collaboration, and control crucial for enterprises. Positioned above data platforms, cloud infrastructure, and AI services, Dataiku integrates the complete enterprise AI stack, enabling organizations to implement AI seamlessly across various vendor environments with centralized governance.The leading global companies trust Dataiku to operationalize AI, transforming it into a vital business performance driver that delivers measurable value. Discover more through the Dataiku blog, LinkedIn, X, and YouTube. Why Join Engineering at Dataiku?Dataiku’s platform, whether deployed on-premise, in the cloud, or as a SaaS solution, connects a variety of data science technologies, showcasing our dedication to quality and innovation. We incorporate the best data and AI technologies, selecting tools that genuinely enhance our product. From the latest large language models (LLMs) to our commitment to open-source communities, you will engage with an exciting array of technologies and contribute to the collective knowledge of global tech innovators. Learn more about working in Engineering at Dataiku here.In the Business Solutions team, we are developing applications that harness Dataiku’s data and AI capabilities, focusing on essential enterprise use cases that require user-centric interfaces and workflows. We cater to sectors such as Manufacturing, Life Sciences, and Finance, enhancing key processes within their business and operational models. In essence, our work embodies the concept of 'everyday AI'!Your ImpactCreate Innovative AI-Driven Applications: Design, develop, and deploy AI-powered applications that address complex business challenges.

Join us at Verso, a pioneering startup supported by Hexa, as a Founding Fullstack Engineer. In this role, you will play a crucial part in the development of our innovative platform. You will have the opportunity to work on both the front-end and back-end of our applications, contributing to the overall architecture and enhancing user experience.We are looking for passionate engineers who thrive in a startup environment, are eager to take on new challenges, and are ready to shape the future of our company.

Join our innovative team at Free2Move as a Lead Senior Fullstack Developer (H/F) to drive the industrialization of our development processes.EnvironmentYou will become an integral part of a dynamic technical team comprising around thirty talented individuals in a warm and enjoyable work atmosphere. You have the flexibility to choose your working setup: it's entirely up to you how you wish to work!Required SkillsNode.jsExpress.jsAWSAngular.js, Vue.jsMongoDB, PostgreSQLKubernetesDocker

About MistralAt Mistral AI, we harness the transformative power of artificial intelligence to streamline tasks, optimize time management, and foster creativity and learning. Our innovative technology is engineered for seamless integration into everyday work environments.We democratize AI through our high-performance, optimized, open-source models, products, and solutions. Our robust AI platform caters to enterprise demands, whether deployed on-premises or in cloud infrastructures. Among our offerings is 'le Chat', an AI assistant designed for both personal and professional use.We are a dynamic and collaborative team, deeply passionate about AI’s potential to revolutionize society. Our diverse workforce excels in competitive settings, dedicated to driving innovation. With teams spread across France, the USA, the UK, Germany, and Singapore, we thrive on creativity, humility, and team collaboration.Join us in redefining the future of AI. Together, we can make a significant impact. Discover more about our culture at https://mistral.ai/careers.About The JobMistral AI is on the lookout for an Applied AI Engineer to champion the adoption of our products, partnering with clients to tackle intricate technical challenges.The Applied AI Engineer - Software Engineer will play a crucial role within our Applied AI Engineering team, focused on ensuring the successful implementation of Mistral AI products. This role involves close collaboration with clients from pre-sales to post-implementation, ensuring our solutions not only meet but exceed client expectations.What You Will Do• Collaborate intensively with researchers, AI engineers, and product engineers on sophisticated customer projects, embedding advanced AI models into client software solutions.• Design, develop, and manage scalable full-stack applications, facilitating seamless interaction between front-end and back-end components.• Work alongside customers to craft complex use cases, providing expert guidance for optimal integration with back-end and front-end interfaces.• Partner with our product and science teams to continually enhance our product offerings and model capabilities, driven by customer feedback.About You• You possess fluency in English.• You hold a degree in Computer Science, Software Engineering, or a related discipline.• You have a minimum of 2 years experience as a technical contributor in advanced technology environments.• You demonstrate strong coding proficiency in Python and TypeScript.• Your passion for AI and innovation is evident in your work ethic and collaborative spirit.

The AI Platform team at Datadog is at the forefront of innovation, developing the infrastructure that fuels next-generation generative AI features across our diverse product range. As a Senior Software Engineer on the Evaluation and Annotation team, you will play a pivotal role in designing and enhancing the systems that define and evaluate AI quality at scale. Your responsibilities will include creating evaluation pipelines, monitoring model performance, and establishing annotation workflows that assess correctness, safety, bias, and reliability in real-world applications. Your contributions will directly influence how Datadog develops and sustains reliable AI capabilities. You will collaborate closely with product, machine learning, and infrastructure teams to set quality standards, integrate evaluation systems with our observability platform, and build human-in-the-loop feedback mechanisms that ensure continuous improvement of model behavior. At Datadog, we cherish our office culture, valuing the relationships we build, the creativity we foster, and the collaboration that arises from working together. Our hybrid workplace model enables employees to cultivate a work-life balance that suits their individual needs.