Fullstack Developer (F# / C#) - Brand Payment

Centreon’s Research and Development team in Paris is hiring a Backend Developer with a strong background in Perl. This position centers on designing, improving, and maintaining the software behind Centreon Infra Monitoring. The primary focus is developing and updating connectors, programs that allow monitoring across a wide range of systems. Each connector includes configuration templates to help users supervise their infrastructure more effectively. What you will do Develop and maintain Perl-based connectors for Centreon Infra Monitoring Adapt to various technologies, working with both software and hardware systems Build connectors that integrate using REST APIs, non-REST APIs, SDKs, SNMP, and other protocols Address user-reported issues and deliver timely fixes Support the transition to new connectors developed in Rust Requirements Strong experience with Perl, essential for current connector development Comfort working with APIs (REST and non-REST), SDKs, SNMP, and varied system integrations Ability to troubleshoot and resolve technical issues efficiently Interest in learning or working with Rust as the connector stack evolves Location This role is based in Paris, Île-de-France, France.

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

Role Overview Accor S.A. is hiring a Senior Java Backend Developer for its Paris office. This position focuses on building and maintaining backend systems that support hospitality services worldwide. What You Will Do Design, implement, and maintain backend solutions using Java. Work closely with team members to deliver systems that improve both internal operations and guest experiences. Contribute technical expertise to projects that drive service quality and efficiency. Impact Your work will shape the reliability and performance of core systems at Accor, directly supporting the way guests experience our services.

About Us Safran.AI, previously known as Preligens, is a subsidiary of Safran Electronics & Defense, offering cutting-edge artificial intelligence solutions for analyzing high-resolution satellite images, full motion video (FMV) streams, and acoustic signals. Our innovative technologies are employed across aerospace, defense, and government applications. Since our inception in 2016, we have developed complex algorithms and software that automatically analyze, detect, and identify military-relevant objects from commercial and government data. Joining Safran in September 2024, Safran.AI also plays a pivotal role in the group's transformation, applying AI solutions in the realm of Industry 4.0. For instance, our automated image analysis capabilities assist inspectors in identifying potential anomalies in critical components using digital imagery. At Safran.AI, innovation and the pursuit of a safer world are at the heart of our mission. By joining us, you will work alongside passionate, multidisciplinary teams (engineers, researchers, developers) who are among the most talented in the industry, all driven by a shared commitment to technological excellence. We foster a stimulating work environment that encourages creativity and initiative, where every idea is valued.

Join our dynamic team at Iliad as a Backend Python Developer in Paris! We are looking for passionate and skilled individuals to contribute to our innovative tech projects. You will work closely with cross-functional teams to design and implement robust backend systems, ensuring high performance and responsiveness to requests from the front-end.Key Responsibilities:Develop and maintain server-side applications using Python.Collaborate with front-end developers to integrate user-facing elements.Optimize applications for maximum speed and scalability.Participate in code reviews and contribute to team knowledge sharing.Stay updated with emerging technologies and best practices.

Join Octopus Energy, where we challenge the status quo in the energy sector by making it greener, more affordable, and accessible to everyone. Originally launched in the UK, our innovative approach has expanded to France since 2022! We combine cutting-edge technology with a team of dedicated professionals who are passionate about our customers and the transition to renewable energy. In just three years, we have grown to become the fifth-largest energy supplier in France! Our mission? To provide all French citizens with cheaper and greener energy, along with practical solutions to accelerate the ecological transition. Currently, we are developing the next generation of products that empower the shift towards sustainable energy. Whether it's facilitating the transition to solar energy and electric vehicles, launching smart pricing, or scaling renewable energy production, we tackle some of the most complex challenges in the energy field! We do this with speed, creativity, and a singular focus on customer satisfaction. As a member of the Octopus Tech team, you will have genuine autonomy, a diverse range of projects to work on, and the opportunity to create products that make a significant impact on people's lives, helping them reduce their bills, live more sustainably, and enjoy truly engaging experiences. You will collaborate closely with our French teams in marketing, operations, and data, as well as with technical teams from other countries in the group . Above all, you will see the real-world impact of your work on our customers quickly. Within the OE Tech France team, you're not just coding; you're building the technological engine that makes green energy simple and intuitive for everyone in France. You will join a small, agile, and innovative team where seniority and collaboration are paramount:- A strong core: You will work daily with 1 Product Manager, 4 Frontend Developers, and 3 Backend Developers. The Backend team is currently composed mainly of senior profiles, allowing you to thrive in a demanding and stimulating technical environment.- Synergy with Data : You will work closely with data experts to leverage insights that drive our innovations.

Role Overview Citech is seeking a Backend Developer with experience in NestJS to support B2B middleware projects in Paris (75012). This position focuses on building and maintaining backend systems that support business operations. What You Will Do Develop and maintain backend services using NestJS Work with cross-functional teams to deliver solutions that improve user experiences Support the performance and reliability of middleware systems for business clients Location This role is based in Paris, 75012.

citech seeks a Backend Developer experienced with NestJS to join the team in Paris. This role centers on building and refining middleware solutions for B2B clients, supporting reliable connections between business platforms. Key responsibilities Develop and maintain backend applications using NestJS Improve middleware processes to enable smooth data flow and integration across systems Collaborate with cross-functional teams to design and deliver scalable systems that meet client needs About citech citech provides business solutions for a diverse client base, with a focus on dependable middleware that links systems and supports ongoing growth.

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.

Accor Corporate is looking for a Senior Java Backend Developer based in Paris. This role centers on designing, building, and maintaining backend systems that support the company’s core services. Main responsibilities Create and maintain backend components using Java Contribute to the stability and performance of systems that power Accor’s platforms Support ongoing improvements to user experience by ensuring backend reliability Key requirements Strong experience working with Java in backend development Ability to design and maintain scalable backend systems Comfort working in a collaborative environment to support business services This position offers the chance to influence how users interact with Accor’s digital services by improving the systems behind them.

Join iliad-free as a dynamic M&A Business Development Manager in Paris. In this pivotal role, you will spearhead mergers and acquisitions, driving growth and innovation within our organization. Your expertise will guide strategic decisions and shape the future of our company.

Join the dynamic technical teams at iad Business Factory, where you will work under the guidance of an Engineering Manager. You will be part of a collaborative squad consisting of developers, Product Owners, Project Managers, Quality Assurance specialists, and designers, all focused on enhancing our Playiad application.Your role will involve developing innovative web-oriented projects as well as evolving and maintaining existing features in a continuous improvement mindset.You will be integrated into the Grow Squad within the MLM Tribe, responsible for core MLM model developments including sponsorship, onboarding, accreditation, real estate training, organizational dynamization (gamification), and genealogical evolution across various geographies. Your primary responsibilities will include:Developing based on concepts established by the technical management (Clean Architecture, TDD, DDD, BDD, etc.),Understanding the business needs of each user story (product culture),Ensuring high quality in deliverables through test-driven development,Engaging in self-directed learning and staying updated on technologies and best practices,Adopting a straightforward and pragmatic approach to development,Collaborating closely with your product family members,Ensuring the reliable operation of applications in production ("You build it, you run it"),Adhering to software craftsmanship principles and XP practices. Technical stack:Development: PHP, SymfonyDatabases: PostgreSQL, MySQLInfrastructure as Code: Terraform, AnsibleAWS: EC2/ECS, RDS/Aurora, Lambda/Step Functions, API GatewayCommunication systems: RabbitMQ, AWS SQS, SNSLinux environment, Shell scripting, Cron jobs, etc.CI/CD tools: GitHub, Docker, GitHub Actions, Jira, Confluence

Join us at iliad-free in Paris as a Staff Engineer specializing in Python. You will take on a pivotal role in our ambitious program aimed at modernizing and evolving our backend systems.Your primary responsibility will be to lead the technical direction of our information system backend, which manages all Free subscribers, including subscription processes, subscriber spaces, and additional services such as video streaming and mobile phone sales.In this role, you will develop a deep understanding of complex business processes executed by our system, such as billing for third-party services, subscription management, and fiber optic connections.You will guide the team in defining the architecture of this distributed system while actively contributing to development using Python, ensuring hands-on involvement.Your expertise will drive development practices that prioritize resilience, quality, testability, and speed of delivery. Additionally, you will be instrumental in establishing robust operational methods in a model where development teams manage their solutions in production, with a constant focus on performance and scalability.

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.

At Outsight, we specialize in innovative software solutions that leverage 3D LiDAR data to monitor the movements of people and vehicles.Our advanced Spatial Intelligence data is invaluable for operators of transportation hubs, including airports and railway stations, as well as sports venues, road infrastructure, and industrial sites. This data helps enhance operations while ensuring user safety and satisfaction.Our diverse team of scientists and engineers is dedicated to developing cutting-edge solutions from our offices in Paris, San Francisco, Sophia-Antipolis (Nice), and Hong Kong, with a commercial presence in Spain to support our global outreach.Learn more about us here: Insights about OutsightExplore insightful articles that illustrate our work: How LiDAR helps Airports manage increased traffic and People Monitoring using LiDAR.

About the Role veepee is looking for a Backend Developer with experience in .Net Core to join the Post Sales team in Paris. This position focuses on building and maintaining backend systems that support customer experience and streamline operations. What You Will Do Design, develop, and maintain backend solutions using .Net Core Work closely with teams across the company to gather requirements and deliver solutions Troubleshoot technical issues and resolve them efficiently Apply software development best practices throughout the project lifecycle Who We’re Looking For Experience with .Net Core in a backend development role Comfortable collaborating with cross-functional teams Strong problem-solving skills and attention to detail Ready to share ideas and contribute to continuous improvement This role is based in Paris and sits within the Post Sales department at veepee.

About Us Safran.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 (FMV) streams, and acoustic signals. Our innovative solutions are implemented in the aerospace, defense, and governmental sectors. Since 2016, our company has been developing sophisticated algorithms and software that automatically analyze, detect, and identify military-relevant objects from both commercial and governmental data sources. Following our integration into Safran in September 2024, Safran.AI is also playing a pivotal role in the group’s transformation by applying AI solutions to Industry 4.0 sectors. For example, automated image analysis through AI aids inspectors in identifying potential anomalies in critical components from digital images. At Safran.AI, innovation and the creation of a safer world are at the core of our mission. By joining us, you will collaborate with passionate, multidisciplinary teams (engineers, researchers, developers) among the industry's most talented professionals, all driven by a shared commitment to technological excellence. We provide a stimulating work environment where creativity and initiative are encouraged, and every idea matters. Your Mission, Should You Choose to Accept It As part of Project Robin, an innovative solution for monitoring strategic sites via satellite imagery and AI, already in production with several clients, you will join a team of 7 developers. Together, you will focus on evolving various backend modules with strong scalability and modularization challenges (data pipeline, database, API, orchestration, deployment). Note: The ability to obtain a Defense clearance is mandatory for this position. As a Senior Software Engineer, you will play a central role in bringing your technical expertise to the design, development, and implementation of our complex software solutions. Your responsibilities will include:→ Maintaining and evolving web applications (Python/FastAPI and JavaScript/React).→ Designing, developing, and maintaining our backend infrastructure and automated pipelines (Python, Airflow, PostgreSQL).→ Collaborating closely with all teams and subject matter experts to understand end-user needs.

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.

Join Dailymotion as a Senior Backend Engineer and play a pivotal role in developing our core components. In this fully remote position, you will work collaboratively with cross-functional teams to design, build, and maintain scalable backend systems that power our video platform.