Mid-Level Backend Engineer - Carpool Monetization

About BlaBlaCar BlaBlaCar connects 27 million members each year, making it possible to carpool or travel by bus in 21 countries. The team includes 800 people from over 50 nationalities, working from five offices worldwide. Around 30% of employees work remotely. Role Overview: Mid-Level Backend Engineer – Carpool Monetization The Carpool Monetization team builds and improves the models that drive how BlaBlaCar monetizes its core carpool services. As a Backend Engineer in this group, the focus will be on developing, scaling, and optimizing the Monetization core services. This covers the full feature lifecycle: discovery, technical design, implementation, testing, deployment, monitoring, and continuous improvement. The team is cross-functional, including 3 Frontend Engineers, 4 Backend Engineers, a Product Manager, a UX Designer, and an Engineering Manager. Projects touch areas like subscription services, freemium experiences, insurance processes, Energy Saving Certificates, and rolling out monetization in new regions. Technology Stack Java backend services delivered through REST APIs Kubernetes infrastructure managed with Terraform Event-driven architecture using Kafka Datadog for application and infrastructure monitoring There is also the option to contribute to frontend development if interested. Main Responsibilities Develop, maintain, and monitor Monetization core services Support application quality and ongoing improvements; join design discussions and code reviews Location Paris, France

BlaBlaCar’s Carpool Supply team in Paris works on the systems at the heart of the company’s carpooling platform. As a Backend Engineer here, the work shapes how people arrange and share rides, influencing the experience for both drivers and passengers. Role overview This position centers on developing and refining backend services that support carpooling features. The team’s efforts help ensure the platform remains reliable and easy to use as it grows. What you will do Design, build, and maintain backend services for carpooling Create solutions aimed at improving the experience for drivers and passengers Work closely with engineers and product teams to deliver systems that scale and perform reliably Location This role is based in Paris, France.

Who We AreYubo is a dynamic social discovery platform designed for Gen Z, enabling users to make new friends and connect authentically online. By removing likes and follows, we encourage our community to express their true selves and forge real connections.With millions of active users, we are revolutionizing how young people socialize online. Our mission is to create a safe, engaging, and inclusive digital environment where everyone can feel secure and valued.Our diverse team is united by a strong commitment to fostering a safe space for our users. We prioritize safety in our operations, collaborating with technology partners and NGOs to establish leading standards in child protection.Join us on this exciting journey to redefine social interaction for the future!About This RoleAs Yubo scales, we are entering a pivotal phase of product development within our Engagement & Monetization squad. This team is dedicated to experimenting and enhancing our core business metrics.We are seeking a Senior Backend Engineer to join our Backend Experience team, reporting directly to Armand, our Engineering Manager. You will work within a multi-disciplinary squad comprising Mobile Engineers, a Product Manager, a Designer, and a Data Analyst, alongside two backend engineers to facilitate your onboarding.Your responsibility will be to set the technical direction and develop backend systems that support continuous experimentation at scale, rolling out services and business logic that cater to millions of users while ensuring reliable and safe interactions.

About BeRealAt BeReal, our mission is to champion authenticity in the realm of social media. We empower our community to share unfiltered moments, fostering genuine connections and celebrating the beauty of real life. With a passionate, international team of over 70 members and more than 40 million monthly active users, we are on a mission to scale BeReal into a leading social network used by millions worldwide, backed by the innovative resources of Voodoo.Your RoleWe are in search of a skilled Senior iOS Engineer to join our dynamic Monetization team. In this role, you will be pivotal in developing and enhancing revenue-generating features that align with the authentic user experience that defines BeReal.Key Responsibilities:Design, implement, and maintain scalable iOS monetization features including ad formats, sponsored content, and premium features within an agile and impactful environment.Collaborate with cross-functional teams, including designers, product managers, data analysts, and backend engineers, to create innovative monetization solutions that enhance user experience.Act as a bridge between advertisers and users, ensuring monetization strategies are seamless and unobtrusive.Optimize the performance and stability of monetization features to ensure they integrate smoothly with the core BeReal experience.Analyze user behavior, A/B test results, and business metrics to refine monetization strategies.Deliver a high-quality, authentic user experience through thoughtful technical solutions.Advocate for and contribute to best practices in code quality, design, and development processes.Continuously innovate and enhance our iOS tech stack, specifically with Swift and SwiftUI.You will leverage AI tools to enhance your creativity and streamline your daily tasks.

About BeRealAt BeReal, we are revolutionizing social media by prioritizing authenticity and real-life connections. Our platform encourages users to share genuine, unfiltered moments, fostering a community of over 40 million monthly active users globally. As part of the Voodoo family, our dedicated team of 70+ is on a mission to scale BeReal into a leading social network embraced by millions.Role OverviewWe are seeking a skilled Senior iOS Engineer to be an integral part of our Monetization team. In this role, you will be pivotal in designing and optimizing revenue-generating features while preserving the unique authenticity that BeReal is known for.Your Key Responsibilities:Architecting, developing, and maintaining scalable iOS monetization features including ad formats, sponsored content, and premium functionalities in a dynamic environment.Collaborating with cross-functional teams—designers, product managers, data analysts, and backend engineers—to innovate monetization solutions that enhance user experience.Acting as a liaison between advertisers/partners and our users, ensuring monetization methods feel organic and unobtrusive.Enhancing the performance and reliability of monetization features to ensure they integrate seamlessly with the core BeReal experience.Analyzing user behavior and A/B testing results to refine monetization strategies effectively.Maintaining a high-quality, authentic user experience through thoughtful engineering solutions.Advocating for and implementing best practices in code quality, design patterns, and development processes.Continuously innovating and enhancing the iOS technology stack (Swift, SwiftUI).You will leverage cutting-edge AI tools to enhance your creativity and optimize your workflow.

About VoodooEstablished in 2013, Voodoo is a leading technology company dedicated to developing captivating mobile games and applications aimed at entertaining users globally. With a dynamic team of 800 professionals, we proudly boast 7 billion downloads and over 200 million active users, positioning Voodoo as the #3 mobile publisher worldwide, following Google and Meta. Our impressive portfolio features top-ranked games like Mob Control and Block Jam, along with popular applications such as BeReal and Wizz.TeamBlitz, our innovative gaming platform launched in 2021, allows players to engage in mobile games for real cash rewards through head-to-head matches, tournaments, and leagues. By leveraging a unique game library and exclusive titles designed specifically for Blitz, we create an engaging and rewarding experience for our users.We are in search of a skilled Monetization Manager to enhance the economic framework and monetization strategies for Blitz, our real-money gaming platform.RoleAnalyze in-game events, content, and offers to provide strategic recommendations for our monetization strategy.Oversee the virtual economy for Blitz, optimizing meta-features to maintain user engagement (missions, challenges, contests, etc.).Develop and manage pricing strategies for virtual goods and services.Contribute to the planning and strategic direction of Live Operations.Conduct competitive analysis by playing our games and examining competitors' offerings to identify enhancement opportunities.Work closely with Monetization and Art teams to provide critical insights during the strategic planning phase.ProfileMaster's degree in Business or Engineering.Exceptional analytical skills with keen attention to detail and strong organizational abilities.A genuine passion for gaming.Proficiency in both English and French.Collaborative team player with a strong team-oriented mindset.Excellent communication and interpersonal skills, coupled with a positive attitude towards feedback.Demonstrated accountability, independence, and ownership in your work.Nice to have :Familiarity with A/B Testing methodologies.Proficient in SQL.Experience with Tableau for data visualization.

About UsAt Yubo, we are revolutionizing the way individuals connect online through our innovative Social Discovery app. By removing likes and follows, we empower our users to form authentic relationships and express their true selves.We have pioneered a fresh approach for Generation Z to engage socially in the digital realm, currently serving millions of active users. Our mission is to continuously redefine how social connections are formed now and in the future.Our team is diverse, multicultural, and passionately dedicated to our vision. As a leading platform for online socialization, we prioritize creating a safe digital environment for our community. Safety is ingrained in our values, and we proactively work on user protection, support, and education, collaborating with the tech industry and NGOs to establish best-in-class child protection standards.Join us on this exciting journey and play a vital role in shaping the future of social interactions!Role OverviewAs we expand our Tech organization for 2026, Yubo is launching a new Innovate squad dedicated to daring product initiatives and high-stakes projects.This squad aims to take bold risks, experiment with ambitious features, and validate ideas through ongoing testing.We are seeking a Senior Backend Engineer to become a key member of our Backend Experience team, reporting directly to Armand, our Engineering Manager.You will work within a multi-disciplinary squad (including Product, Mobile, Design, and Data) alongside a Senior Backend Engineer who shares leadership responsibilities.Your mission? Design, implement, and manage high-risk backend experiments that test groundbreaking product ideas while ensuring our systems remain resilient, scalable, and cost-effective throughout rapid iteration cycles.This position is not about maintenance; it's focused on building, testing, rolling back, iterating, and learning swiftly.

Join inetum2, a leader in digital transformation, as a Business Analyst specializing in monetization strategies. In this dynamic role, you will collaborate with cross-functional teams to analyze market trends, optimize revenue streams, and enhance user experiences. Your insights will drive strategic decisions and contribute to the growth of our innovative solutions.

Trade Republic Bank is looking for recent graduates to join the Backend Engineering Program in Paris. This team builds and maintains the core systems behind Europe’s leading savings platform, which serves over 10 million customers across 18 countries and manages more than €150 billion in assets. This program offers a hands-on introduction to backend engineering in a high-impact, real-world setting. Graduate engineers work alongside experienced developers who provide mentorship and support as you move from academic knowledge to building production-ready systems. What you will do Contribute to backend services using modern JVM technologies such as Kotlin, Java, and Spring Assist in designing and developing scalable, reliable systems Work with APIs, databases, and service-oriented architectures Learn to write clean, maintainable, and well-tested code Collaborate with Product and Engineering teams to deliver features for users Gain exposure to cloud infrastructure (AWS), containerization, and CI/CD pipelines Help debug, monitor, and improve system performance Gradually take ownership of well-defined technical projects Learning and growth Participants will see how backend systems are built, deployed, and scaled in a live production environment. The program is designed to help you develop practical engineering skills while contributing to projects that matter to millions of users.

airapps is hiring a Backend DevOps Engineer in Paris. This position centers on building and maintaining systems that keep backend services running smoothly and reliably. Role overview The Backend DevOps Engineer will design and implement solutions to help backend services scale and remain dependable. Collaboration with both development and operations teams is key, with a focus on improving workflows and boosting system performance. What you will do Create and maintain scalable infrastructure for backend services Work alongside developers and operations staff to streamline processes Identify opportunities to enhance system reliability and efficiency Location This role is based in Paris.

About VoodooEstablished in 2013, Voodoo is a leading technology company dedicated to developing mobile games and applications that entertain users globally. With a diverse team of 800 employees, our impressive portfolio boasts 7 billion downloads and over 200 million active users, making Voodoo the third-largest mobile publisher worldwide, following Google and Meta. We are proud to showcase hit games like Mob Control and Block Jam, as well as popular apps such as BeReal and Wizz.TeamOur Growth team serves as a dynamic unit focused on maximizing the potential of our mobile products. This team merges expertise in user acquisition, creative content development, monetization strategies, and advanced technology to transform applications into global success stories. With over 150 specialists, we are at the cutting edge of mobile marketing and ad technology, across a wide variety of games and consumer applications.RoleWe are seeking a Strategy & Operations Manager to join our Ad Monetization team. In this role, you will engage with revenue-critical initiatives, utilizing strategic insights, data analytics, and operational execution to enhance performance across millions of daily users. This position is perfect for individuals with a consulting or analytical background looking to transition from advisory roles to managing a multi-hundred-million-euro revenue stream.Drive Revenue PerformanceOversee ad monetization performance across a diverse portfolio of games and applications.Conduct in-depth analysis of revenue drivers such as ARPDAU, fill rate, eCPM, LTV, and ad engagement metrics.Identify and implement structural improvements across waterfall configurations, in-app bidding, pricing strategies, and demand diversification.Transform analytical findings into actionable strategies that yield measurable revenue impact.Optimize the Ad Tech StackCollaborate closely with engineering teams to enhance mediation setups, experimentation frameworks, and auction dynamics.Design and lead A/B tests to maximize yield and enhance long-term LTV.Evaluate and incorporate new ad networks, bidding partners, and monetization formats.Proactively anticipate shifts in the ecosystem regarding privacy, platform policies, and auction mechanics.Lead High-Impact ProjectsDeconstruct complex ad monetization challenges into actionable workstreams.Collaborate with product, user acquisition, data, and creative teams to ensure alignment in ad monetization efforts.

Everience seeks a Data & AI Consultant in Paris to help clients use analytics and artificial intelligence for real business results. This mid-senior level position involves collaborating across teams and shaping data-driven strategies that improve how organizations operate. Role overview This role focuses on applying data analytics and AI to solve client challenges. Consultants work closely with colleagues from different specialties, sharing expertise and developing solutions that make a clear impact for clients. What you will do Use data analytics and AI techniques to support client decision-making Create strategies that help organizations become more data-driven Partner with cross-functional teams to design and implement solutions tailored to client needs Contribute to ongoing projects and adapt to new challenges as they come up Requirements Background in data analytics and artificial intelligence Ability to work well with professionals from a variety of backgrounds Interest in continuous learning and growth in a changing field This position is based in Paris.

Join Fabulous Co. as a Senior Backend Engineer specializing in NodeJS and contribute to our rapid growth in the health and wellness sector. In this startup-like environment, you’ll collaborate closely with our experienced CTO to develop cutting-edge features such as marketing optimization engines and billing reports. If you’re passionate about leveraging technology to help people cultivate healthy habits worldwide, we invite you to be part of our dynamic engineering team.

Join Nexton, a leading player in the Telco Media Transport sector, as a PHP Developer. In this dynamic role, you will be responsible for designing, developing, and maintaining web applications that serve a diverse clientele. We are looking for a passionate and skilled developer who thrives in a collaborative environment and is eager to tackle challenging projects.

Join the Voodoo TeamFounded in 2013, Voodoo is a leading technology company dedicated to creating captivating mobile games and applications with the goal of entertaining users across the globe. With a robust workforce of 800 talented individuals, we have achieved over 7 billion downloads and boast more than 200 million active users. Voodoo stands as the third largest mobile publisher worldwide by downloads, trailing only Google and Meta. Our impressive portfolio features popular titles such as Mob Control and Block Jam 3D, along with trending apps like BeReal and Wizz.Your RoleAs a Senior Backend Engineer, you will collaborate within a dynamic team of five engineers focused on enhancing our gaming backend platform. This role requires close interaction with various departments, including Core Gaming, Live Gaming, and Engineering & Data. You will contribute to our transition from Hyper-Casual to Hybrid, Casual, and Mid-Core games, playing a pivotal role in scaling our backend architecture to support new and existing titles.Your responsibilities will encompass designing scalable backend systems that serve millions of players daily. You'll partner with client developers and game designers throughout the entire process, from conceptualizing new features to their successful implementation and iteration.

About VibeAt Vibe.co, we are revolutionizing the way brands connect with audiences in the streaming era. We envision that streaming TV transcends traditional brand awareness; it is poised to be the next major avenue for performance marketing. Our mission is to create the infrastructure that harnesses this $100 billion potential.As a leader in Audience First Streaming TV Advertising, Vibe.co empowers marketers to leverage TV as an effective growth channel. Our comprehensive solution integrates hyper-targeted audience segmentation, AI-driven insights, real-time campaign optimization, and incrementality measurement, providing brands of all sizes the accuracy and transparency they expect from social and search advertising, applied to the TV landscape.With over 10,000 trusted brands and a reach of more than 120 million households across 500+ apps and channels, Vibe.co consistently delivers an impressive average return on ad spend of 250% and a 20% lift in sales. Achieving a $100 million revenue run rate in less than two years, we are among the fastest software companies to reach this remarkable milestone.Our investors include notable firms such as Hedosophia (early backer of Spotify, Uber, and Airbnb), Elaia, Singular, QuantumLight, and Illusian, alongside angel investors like Carolyn Everson, board member of The Walt Disney Company and Coca-Cola. Nirav Tolia, CEO of Nextdoor, is also a member of our board of directors.Founded in 2022, Vibe.co is recognized as a pioneering platform in streaming TV advertising, merging the power of performance marketing akin to Meta and Google with the fast-evolving media landscape.About the RoleAs a key member of the Performance team, you will play a vital role in managing advertiser outcomes at Vibe. Your focus will be on bidding, pacing, and enhancing the prediction stack that drives these elements. You will report directly to Clément Schiano, Engineering Manager for Performance.This position has been created to address a clear roadmap and enhance execution capabilities, as well as to mitigate knowledge concentration challenges within the team. We seek an individual who can absorb, challenge, and expand upon existing expertise, going beyond simply delivering tickets.Three compelling reasons why a talented candidate would find this role appealing:

About the Role Shift Technology is looking for a Junior Backend Engineer with C# experience to join the team in Paris, France. This role focuses on building and maintaining backend systems that power the company's products. Work closely with seasoned engineers and contribute to projects that shape Shift Technology's technical direction. What You Will Do Develop and support backend components using C# Help maintain and improve existing systems Collaborate with other engineers on technical projects Location Based in Paris, France.

Join Mistral as a Backend Software Engineer and be part of a dynamic team that is shaping the future of cloud technology. In this role, you will be responsible for developing robust backend systems, ensuring seamless integration, and optimizing performance. Collaborate with cross-functional teams to deliver innovative solutions that meet our clients' needs.

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.

Note: This position is based in Paris, France. Relocation and visa support are available if necessary.Achieve the Best Work of Your CareerTrade Republic stands as Europe's largest savings platform, actively engaging in 18 countries and serving over 10 million customers who trust us with more than €150 billion in assets. Our ambition goes beyond that.Our mission is to empower individuals to build wealth through easy, safe, and free access to financial systems. Join us to advance your career while collaborating with exceptional talent and cutting-edge technology, creating a positive impact for millions.Your ResponsibilitiesDevelop and test services and products utilizing modern tools from the JVM ecosystem, including Kotlin, Spring, Vert.x, Hibernate, or jOOQ.Design cloud services with a focus on high availability, low latency, and scalability (primarily on AWS).Implement automated software delivery through GitHub Actions, container-based CI/CD pipelines, and Kubernetes orchestration.Ideal Candidate ProfileA minimum of 5 years of experience in software engineering, preferably within the JVM ecosystem. We welcome candidates from mid to staff level, so whether you are looking to take on more ownership or have extensive experience leading complex systems, we encourage you to apply.Proven experience in developing and deploying scalable features within a service-oriented architecture.A strong dedication to delivering reliable and maintainable software through an iterative development approach and continuous delivery.Experience in building platform services that serve as a foundation for product development (prior experience in platform-focused teams is advantageous).Comfortable working in a flexible hybrid environment, with 2-3 days a week in the office.Why You Should Apply NowOur culture celebrates ownership, excellence, and high energy. We prioritize outcomes and accountability as we strive to tackle one of Europe's significant challenges: closing the pension gap and democratizing wealth. If you resonate with this mission, we want to hear from you!