Senior Full-Stack Software Engineer - Frontend Experiences

Join our dynamic team as a Frontend Product Engineer and play a pivotal role in ensuring the safety and integrity of large language models (LLMs).About White CircleWhite Circle specializes in AI safety, developing a comprehensive framework for the reliability, safety, and optimization of AI systems. Our platform is centered around clear, natural-language policies that dictate the appropriate and inappropriate actions of AI models. We continuously test, enforce, and enhance these policies on a large scale.Secured $11 million in funding from leading investors, including founders and senior executives from OpenAI, Anthropic, HuggingFace, and more.Handling over 100 million API calls monthly.Expertly fine-tuning and training our own LLMs for enhanced performance and cost-effectiveness compared to other models.Our small, focused team is looking for individuals eager to tackle challenging problems, quickly implement their work into production, and significantly contribute to the development of AI safety standards.Your Qualifications:Proficient in TypeScript, React, Next.js, and Tailwind CSS.Experience with LLMs, including familiarity with the OpenAI API, function calling, and context management.Ability to write complex SQL queries without needing external references.Strong focus on design, usability, and performance, prioritizing quality over mere functionality.Your Responsibilities:Oversee and deliver product features across the entire stack, from design and implementation to deployment and ongoing improvements.Craft intuitive, high-quality user experiences, ensuring smooth transitions from user onboarding to in-depth analysis.Collaborate with founders, product managers, designers, ML engineers, and researchers to transform intricate AI functionalities into user-friendly, dependable products.Lead the complete development lifecycle while influencing technical direction, product strategy, and engineering culture.Why Choose White Circle?Competitive salary ranging from $80,000 to $150,000 plus equity options.20 days of paid vacation annually.Opportunities to work from Paris in a hybrid model, including a relocation package.

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.

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 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.

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 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.

About LuoPay LuoPay provides foreign exchange and cross-border payment solutions for businesses across Africa. The company aims to help African businesses transact with international suppliers more efficiently, transparently, and cost-effectively than traditional banking methods. LuoPay has seen strong growth in several markets and is expanding its engineering team to continue building financial infrastructure for FX and payments in Africa. Role Overview The Lead Frontend Developer will join LuoPay in Paris, working alongside engineers to improve both internal tools and products used by customers. This position plays a key role in supporting a payment infrastructure that processes millions of euros in transactions every day. Success in this role depends on a deep understanding of customer needs, the ability to weigh project priorities for maximum impact, and clear communication across technical and non-technical teams. Main Responsibilities Build and launch dynamic web applications using React. Design user interfaces that are intuitive and easy to use. Work with teams across the company to gather requirements and feedback. Contribute to product research and help create wireframes. Partner with backend engineers to design APIs and support deployment. Test thoroughly to maintain high product quality. Apply AI-driven development methods to improve productivity. What LuoPay Looks For At least 6 years of experience building web products. Background working in small teams where priorities can shift quickly. Strong focus on product outcomes and customer satisfaction. Excellent written and spoken communication. Ability to identify trade-offs and balance effort with expected results. Tech Stack Experience with React, Typescript, Golang, Postgres, Docker, Gitlab, GCP, and Cloudflare is important for this role.

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.

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.

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 everience as a Production Engineer and become a key contributor to our innovative engineering team. In this dynamic role, you will be responsible for optimizing production processes, enhancing efficiency, and ensuring project deliverables meet the highest standards. Your technical skills will play a crucial role in the successful deployment of our engineering solutions.

Paris | Full-time | Fluent in French & English E-commerce is thriving, yet independent brands often find it challenging to compete with the streamlined logistics of giants like Amazon. At Bigblue, we are dedicated to transforming this landscape.We empower brands by democratizing top-tier operations, enabling them to scale rapidly while providing an exceptional customer experience.Founded in 2018, we have developed a technology-driven logistics platform that supports over 500 brands, ranging from fast-growing DTC startups to renowned global names such as MUJI, Aigle, and Cabaïa. With a team of more than 110 employees across Paris, Madrid, and London, our proprietary WMS (Warehouse Management System) Atlas and a network of 7 warehouses across Europe are designed to tackle logistics challenges that others shy away from, making fulfillment faster, smarter, and greener.Backed by over $20M in funding and trusted by the next generation of e-commerce leaders, we are rapidly scaling towards our goal of processing 10 million orders in 2024 as we embark on ambitious enterprise expansion. The journey ahead is exciting, and we are looking for the right individual to help us lead the way.About the Product TeamAs part of the team driving Bigblue's growth, you will have a threefold mission:• Absorb complexity and connect teams to facilitate rapid scaling without disruption.• Maintain close relationships with merchants and warehouse operators to identify issues and opportunities proactively.• Ensure that every product release enhances the user experience, making it smoother and more reliable.You will collaborate with experienced product managers and engineers from top companies (Apple, Vimeo, Frichti, Kapten, Alan, etc.), gaining hands-on product expertise, refining your technical skills, and playing a crucial role in shaping the future of Bigblue.

About the Role airapps is looking for a Frontend Web Developer in Paris. This position focuses on building web applications that are both engaging and easy to use. The work directly supports business objectives and improves the experience for our users. What You Will Do Develop and maintain user-facing web applications Work closely with designers and backend developers to deliver high-quality features Write clean, efficient, and reliable code Contribute to project planning and overall team success Location This role is based in Paris.

Become a pivotal member of a visionary team that is reshaping global living standards.At The Flex, our mission is to transform the rental experience, making it instantaneous, intelligent, and seamless—much like booking a ride.Our bold ambition? To empower individuals to live anywhere, at any time, without the usual hassles.Utilizing our advanced automation engine, Base360.ai, we are crafting a revolutionary operating system for modern renting—integrating property data, streamlining operations, and facilitating effortless stays across the globe.If you are passionate about developing products from start to finish, have a keen eye for user experience, and thrive on managing tangible systems that impact real users, this role is tailored for you. What You'll CreateAs a Senior Product Engineer, you will navigate the intersection of product, engineering, and operations.You will take ownership of features from conception to deployment—crafting the product, designing the architecture, coding, and implementing enhancements that significantly affect guests, operators, and partners.This position is ideal for engineers who prioritize product development over ticket resolution and are deeply invested in usability, performance, and tangible results. Your Key ResponsibilitiesOwn Product Features End-to-EndDesign, create, and enhance core product experiences across both web applications and APIs.Build for UsersConvert genuine operational and user challenges into straightforward, user-friendly product solutions.Ship Fast, Learn FasterRelease frequently, collect feedback, and continuously iterate.Design Scalable SystemsDevelop clear, maintainable architectures that grow alongside the platform.Automate the ExperienceLeverage automation and smart workflows to eliminate friction for both guests and operators.Collaborate CloselyPartner closely with product, design, data, and operations teams to transform ideas into impactful solutions. Ideal Candidate ProfileProven experience in developing user-facing products as a senior engineer.Proficient in working across frontend, backend, and APIs.Familiarity with modern web technologies (React, Node.js, cloud-native platforms).A strong product-oriented mindset—focused on understanding why a feature is developed, not just how.

At Datadog, our Real User Monitoring (RUM) tool offers unparalleled insights into the performance and availability of frontend applications, enabling customers to monitor user experiences in real time across various platforms, including web, mobile, and smart TVs. As a Product Manager II for RUM, you will play a pivotal role in assisting customers with onboarding and scaling their usage effectively. You will drive product consistency and develop intelligence fueled by performance and availability data. Collaborating closely with enterprise clients and cross-functional teams, you will help shape the vision, strategy, and execution for one of our rapidly growing offerings. This is a unique opportunity to influence a high-impact product at scale while deepening your expertise in frontend observability and user experience monitoring.At Datadog, we cherish our office culture, fostering relationships and collaboration that spark creativity. We operate in a hybrid workplace model, allowing our team members to achieve a work-life balance that suits their individual needs.

We are seeking a dynamic and experienced Lead Frontend Developer to join our innovative team at myjobcompany1. In this role, you will lead the development of high-quality, scalable web applications utilizing the latest technologies. You will collaborate with cross-functional teams to define, design, and ship new features while ensuring a seamless user experience.

Join bigblue as a Product Solutions Engineer and play a pivotal role in delivering innovative solutions that meet the diverse needs of our clients. You will collaborate with cross-functional teams to design, implement, and optimize product solutions that drive customer satisfaction and business success.

Join Meritis as a Production Engineer (H/F) and be part of a dynamic team dedicated to optimizing production processes and enhancing operational efficiency. You'll be responsible for implementing innovative solutions and collaborating with cross-functional teams to ensure seamless production flows.