Engineering Manager - Ruby Application Platform

About UsAt Doctolib, we are dedicated to creating scalable products that effectively serve millions of users across Europe while remaining maintainable by our talented team of developers. With multiple daily deployments and over 25,000 automated tests within our CI pipeline, our backend operates on Ruby on Rails, supported by PostgreSQL and MongoDB. Our Post…

Join our dynamic team at myjobcompany1 as a Ruby on Rails & Node.js Application Developer. We're looking for passionate and skilled developers to create innovative applications that enhance user experiences. If you have a knack for developing scalable software solutions and enjoy working in a collaborative environment, this is the perfect opportunity for you!

Role Overview JobTeaser is hiring a Senior Backend Engineer with strong Ruby experience to join the team in Paris. This role focuses on building and maintaining scalable backend systems that support our platform. What You Will Do Design, develop, and maintain backend solutions using Ruby Work with cross-functional teams to deliver reliable features and improvements Write high-quality code that supports a strong user experience Location This position is based in Paris.

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.

Join Dailymotion as a Senior Engineering Manager specializing in mobile social applications. In this pivotal role, you will lead and mentor a dynamic team of engineers, driving innovation and excellence in our mobile platform. If you are passionate about creating engaging social experiences on mobile devices and have a strong technical background, we want to hear from you!

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...

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 UsSafran.AI, formerly known as Preligens, is a subsidiary of Safran Electronics & Defense, specializing in artificial intelligence solutions for analyzing high-resolution satellite imagery, full-motion video streams, and acoustic signals. Our innovative solutions cater to the aerospace, defense, and governmental applications.Since 2016, we have been developing complex algorithms and software that enable the automatic analysis, detection, and identification of military-relevant objects from both commercial and governmental data sources.Following our integration into Safran in September 2024, Safran.AI also plays a pivotal role in transforming the group by applying AI solutions to Industry 4.0 domains. For instance, our automated image analysis capabilities assist inspectors in identifying potential anomalies in critical components using digital images.At Safran.AI, innovation and the quest for a safer world are at the core of our mission. By joining us, you'll collaborate with multidisciplinary teams of passionate engineers, researchers, and developers who share a common drive for technological excellence. We foster a stimulating work environment that encourages creativity and initiative, where every idea is valued. Your Mission, Should You Choose to Accept ItThe AI Engineering team is responsible for developing and operating an internal AI production platform, essentially our very own AI Factory, utilized by Data Scientists to design, train, and deploy models at scale.The platform, originally focused on satellite image processing, is now entering a new phase characterized by:→ Diversification of data types (video, acoustic, factory imaging)→ Significant growth in the number of production models→ Increased requirements for robustness, security, and operability→ Expansion of use cases in air-gapped environments and across multiple sitesIn this context, we are evolving our approach towards a comprehensive Data Platform & ML Platform capable of supporting these diverse uses, hybrid environments, and stringent industrialization constraints.The team comprises about twenty engineers with hybrid AI, Software, and Data profiles, organized into three squads: MLOps platform, Data platform, and Enabling & DevX.

The AI Platform at Datadog is at the forefront of our AI infrastructure, dedicated to empowering data scientists and engineers with robust tools and platforms for large-scale training and inference. Our initiatives include notable products such as Bits AI, LLMObs, and additional AI research efforts.As the Engineering Manager for the Training & Serving team, you will play a pivotal role in a rapidly expanding team and help define our technical vision and roadmap. Your team will tackle significant technical challenges, including distributed training of foundation models, scaling serving systems, and enhancing user experience.You will collaborate closely with other teams within the AI Platform organization to ensure a smooth AI development cycle and partner with the Applied AI organization and Datadog infrastructure teams to build systems from the ground up.At Datadog, we prioritize our office culture, valuing the relationships, creativity, and collaboration that come from working together. We embrace a hybrid work model to allow our employees to achieve a work-life balance that suits them best.

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 our dynamic team at amo as a Location Platform Engineer, where you will play a crucial role in developing and enhancing the infrastructure that efficiently retrieves and processes background location data across diverse devices and operating systems. This position provides an exciting opportunity to work on scalable production systems while ensuring battery efficiency, adhering to privacy standards, and maintaining OS compatibility.We are looking to bring on board several engineers with varying levels of experience. Kindly specify your years of experience in the application form.If you are a seasoned engineer: You will take the helm of the location platform, evolving our technological stack to meet new challenges, mentoring junior team members, and spearheading enhancements in accuracy, efficiency, and compliance.If you are a junior engineer: You will contribute under mentorship, gaining invaluable hands-on experience with production systems, learning cross-platform infrastructure, and developing core skills in backend and client-side development.Your daily responsibilities will encompass:Develop and sustain backend services using Rust alongside client-side codebases in Rust, Kotlin, and Swift.Contribute to systems that manage high traffic and substantial volumes of location data.Enhance scalability, reliability, and performance, both independently and under guidance based on your experience level.Cross-Platform ConsistencyBolster infrastructure that supports both iPhone and Android devices, accommodating various OS versions and OEM variants.Collaborate with iOS and Android engineers to ensure a cohesive and seamless user experience.Feature DevelopmentImplement and optimize the collection of location data through Wi-Fi, network signals, GPS, and Bluetooth technologies.Adapt to evolving OS updates and privacy regulations, balancing precision with battery efficiency.Assist in the development of internal tools, including analytics dashboards, debugging utilities, and user-specific analysis tools.Operational ExcellenceMonitor system metrics, troubleshoot bugs, and proactively resolve performance issues.Ensure adherence to privacy regulations and OS standards.Cultivate robust engineering practices in testing, observability, and documentation.Commitment to Ongoing LearningEngage in continuous improvement and stay updated with technological advancements.

At Joko, we are on a mission to transform the shopping experience for consumers by enabling smarter purchasing decisions and substantial savings. Established in the vibrant city of Paris, Joko is a forward-thinking tech firm and a certified B Corp, boasting a diverse team of over 90 talented individuals across Paris, Barcelona, New York, and beyond. Our platform currently empowers more than 5 million users to save money daily at over 10,000 merchants.Our innovative offerings, ranging from cashback rewards and automated coupons to price alerts and carbon footprint tracking, are continually evolving. We are also excited to be developing an AI-powered shopping assistant aimed at helping users discover the best products based on price, quality, and environmental impact.Having achieved profitability in our primary market, we are now focused on scaling our operations globally with a particular emphasis on the US market.Join us at the dawn of this journey; let’s redefine the future of shopping together! Meet our Product Team – PlatformUnder the leadership of Fabien, our VP of Product, Joko’s Product team is dedicated to delivering exceptional user experiences. We collaborate closely with Engineering, Design, and Business teams to transform ideas into reality, guiding projects from initial discovery to successful delivery and launch.Within this dynamic team, the Platform tribe serves as the foundation of Joko’s scalability. We are responsible for designing and building internal platforms, tools, and technical infrastructures that empower the company to operate swiftly, reliably, and with confidence as we expand internationally.This team manages crucial domains such as internal products, back-office platforms, security, compliance, and operational reliability. By investing in scalable foundational systems, the Platform team enables high-level execution across all teams and supports Joko’s long-term growth strategy.As the Platform tribe is currently being established, this role presents a unique opportunity to influence the direction, scope, and impact of the team in close partnership with senior engineering leadership. Your ResponsibilitiesAs the Product Manager for the Platform tribe, you will take on comprehensive product ownership for Joko’s internal platforms and technical foundations.Platform Vision & Roadmap: Establish the product vision and roadmap for internal platforms (back-office, infrastructure, security, compliance, reliability) in alignment with company priorities and technical capabilities.Ownership of Internal Platforms: Manage the complete lifecycle of internal products and tools (e.g., Joko Admin, internal tooling, integrations), from defining problems to delivering solutions.

About LedgerAt Ledger, we are a passionate team of innovators dedicated to redefining digital ownership and freedom. Our mission is to empower users, creators, and enterprises to manage their value independently and securely. We thrive on curiosity and are committed to making technology inclusive for everyone. As a global leader in digital asset security, with over 20% of the world's crypto assets safeguarded through Ledger devices, we have established a strong presence not only in Paris, where our headquarters is located, but also across multiple international offices. Our diverse team of around 600 professionals develops cutting-edge products and services that allow individuals and businesses to seamlessly buy, store, swap, and manage their crypto assets, including our acclaimed hardware wallets, which have reached over 7.5 million units sold in 200 countries.We are currently on the lookout for a seasoned Director of Platform Engineering to lead our Platform Engineering team within the Infrastructure & Operations department. Reporting directly to the VP of Infrastructure & Operations, this pivotal role involves overseeing the development and maintenance of our cloud infrastructure, as well as enhancing developer platforms and tools. The ideal candidate will possess a robust technical foundation, outstanding leadership capabilities, and a genuine enthusiasm for creating resilient, scalable platform services while ensuring the reliability of production infrastructure.Key Responsibilities:Formulate and implement the platform engineering strategy in alignment with business objectives and Infrastructure & Operations goals.Lead and inspire the Platform Engineering team to achieve high performance.Establish and enforce best practices, standards, and architectural guidelines for platform services and production cloud infrastructure.Collaborate with engineering leadership and Infrastructure & Operations teams to define the requirements for platform and production systems.Serve as the ultimate escalation point for complex platform engineering challenges that exceed Level 2 operations support.

The AI platform at Datadog is integral to our commitment to delivering exceptional AI infrastructure. Our goal is to equip data scientists and engineers with powerful tools and platforms that facilitate seamless large-scale training and inference. We proudly support innovative products such as Bits AI, LLMObs, and our extensive AI research.Join our rapidly expanding team that plays a pivotal role in shaping the future of Datadog. In this position, you will be vital in building and scaling our team, defining our technical vision, and crafting the roadmap for our initiatives. You will oversee other managers and play a key role in structuring our organization, including recruiting future managers and individual contributors. Collaborate closely with various teams within the AI platform organization to ensure a streamlined AI development cycle, and work alongside the Applied AI organization, product engineering teams, and Datadog's infrastructure and tooling teams to build systems from the ground up.At Datadog, we cherish our office culture—fostering relationships, encouraging creativity, and promoting collaboration are fundamental to our mission. We embrace a hybrid workplace model, allowing employees to achieve a work-life balance that suits their needs.

Dashlane seeks a Staff Platform Engineer - Web to join the Paris team. This position focuses on building and maintaining the core web platform, with an emphasis on performance and user experience. Role overview The Staff Platform Engineer - Web will play a key part in shaping development processes and setting technical direction for web projects. The work centers on delivering secure, efficient solutions that support Dashlane’s standards for quality and reliability. What you will do Lead efforts to improve and maintain the web platform Guide development teams with technical expertise Focus on optimizing performance and user experience Who we’re looking for Experience building and maintaining web platforms Strong interest in technology and user-focused design Enjoys working collaboratively and sharing knowledge Brings innovative ideas to technical challenges

Speechify is looking for a Software Engineer, Platform based in Paris, France. This position centers on developing and enhancing features for the company’s text-to-speech platform. Role overview The main goal is to design and build new capabilities that make Speechify’s platform stronger and more reliable. Work will directly support a better experience for users worldwide. What you will do Create and implement new features for the text-to-speech platform Contribute to projects that improve user experience for a global audience Location This role is based in Paris, France.

About UsAt Ankorstore, we're dedicated to empowering independent brands and retailers by streamlining the wholesale process, making it easier, quicker, and more profitable for all involved.Our aim is to create a robust infrastructure that supports contemporary wholesale practices for brands—from enhancing visibility among suitable retailers to managing orders, logistics, and financing—enabling both parties to collaborate on more sustainable terms.The role of Lead Data Platform Engineer is essential to our mission, overseeing the architecture, reliability, and strategic evolution of our data infrastructure.You will spearhead a diverse team of Data Engineers and Analytics Engineers to develop a state-of-the-art Modern Data Stack. Your objective is to connect raw infrastructure with business intelligence, ensuring efficient data ingestion and transformation using BigQuery, Airflow, and dbt, while also facilitating actionable insights through advanced visualizations in Sigma Computing and product analytics in Amplitude.

Join Speechify as a Senior Software Engineer focusing on Windows/Desktop applications in the vibrant city of Paris. In this role, you will be instrumental in designing, developing, and maintaining high-quality software solutions that redefine how users interact with text and audio. Your expertise will guide our team in implementing innovative features that enhance user experience and drive our mission forward.

Join Waniwani as a Founding Platform Engineer and revolutionize our infrastructure for seamless scalability.We have pioneered the first insurance application integrated with ChatGPT. Today, numerous companies are eager to leverage our platform to establish their own AI-driven storefronts. Each client requires a dedicated MCP server, a unique codebase, and tailored distribution, all functioning seamlessly and interconnected under your management.About WaniwaniWaniwani is at the forefront of creating the AI distribution framework for the $10 trillion services economy. Our platform empowers businesses to offer quote-based services such as insurance and wealth management directly within LLMs, where consumer purchasing decisions are increasingly shifting. Imagine Shopify, but tailored for services — we are constructing the foundation for AI-native commerce.We are just beginning this transformative journey. Our launch of ChatGPT insurance resulted in a staggering $26 billion in market cap losses for major brokers within just 48 hours, marking what the press has dubbed "the industry's ChatGPT moment." We refer to it as Day 1.Why This Position MattersHaving surpassed the proof of concept stage, our product is operational. We are now tasked with managing this for hundreds of clients simultaneously, each with its own MCP server, distinct data pipelines, and customized distribution dashboards, all while ensuring the platform remains robust and responsive.This role presents a systems-level engineering challenge. You will be responsible for architecting a solution that allows Waniwani to expand from dozens to thousands of deployments. This includes multi-tenant infrastructure, orchestration of multiple codebases, and real-time data flow across a multitude of interconnected services. In this role, a single flawed abstraction can cost months, whereas a well-designed one can save years.We anticipate that AI will write 95% of your code. Your expertise will not lie in typing code but in discerning what needs to be built, how to structure it, and when the AI may be misguided. You will work at a pace that integrates LLMs as a fundamental aspect of your engineering process, rather than viewing them as a novelty. The key challenge will be exercising judgment, not merely keystrokes.

Your Impact The Data Product Manager serves as the primary liaison for internal stakeholders, helping them articulate their needs and collaborating with Analytics Engineering and Data Science teams to design, develop, and sustain a variety of data products. These include raw data, aggregated datasets, dashboards, and data exports that effectively solve user challenges. We are on the lookout for a Senior Product Manager specializing in Data and AI Platform to bolster our team. Our platform group is dedicated to creating tools and services that empower product teams, data scientists, and data engineers to innovate AI products. This encompasses solutions for data ingestion and export, product development, data access and exploration, as well as training, evaluating, and serving AI models. As a Platform Product Manager, your mission will be to define and prioritize strategic initiatives, ensuring the data and AI platform maximizes value for Doctolib and its users while maintaining scalability. This is an exhilarating time to join us as we implement transformative changes aimed at creating a more unified, open, scalable, and efficient platform to realize Doctolib's aspirations in AI. As a Platform PM, one of your core responsibilities will involve shaping the vision, strategizing to achieve that vision, tracking platform performance with appropriate metrics, and collaborating with the engineering team to prioritize and execute initiatives. Your responsibilities will include but are not limited to: Developing the data platform vision and roadmap by applying a product-focused approach to enhance the impact and scalability of each component and service. Working with data governance to establish robust data governance policies for effective data management. Defining and prioritizing solutions by leading the OKR definition for your team and collaborating with platform engineers to create a roadmap that aligns with the product vision. Engaging in short and mid-term prioritization, consulting with users and platform engineers, and securing the right resources to enhance platform elements. Facilitating communication with users and cross-functional teams to ensure alignment on the platform vision, strategy, and roadmap. Identifying user challenges and ensuring that products deliver the anticipated impact by maintaining continuous engagement with users and assessing the data and AI platform. Leading discovery sessions, scoping, and explorations while closely collaborating with stakeholders and data teams to guarantee that initiatives meet expected outcomes. Promoting the adoption of the data platform in conjunction with data teams and end-users.