Fullstack Java Developer (H/F)

Join our innovative team at Meritis as a Fullstack Java Developer (H/F). We are looking for a talented individual who is passionate about technology and eager to work on diverse projects that challenge your skills and creativity.As a Fullstack Java Developer, you will be responsible for designing, implementing, and maintaining web applications using Java tec…

Join our dynamic team at Alten as a Fullstack Java / React Developer (H/F). We are looking for passionate developers who thrive in innovative environments and are eager to work on exciting projects that push the boundaries of technology.

Role Overview Prelude is looking for a Full-Stack Engineer based in Paris, France. This role involves building and maintaining both front-end and back-end features for our applications. The work touches every layer of our systems and directly shapes how users interact with our products. What You Will Do Develop new features across the stack, from user interfaces to server-side logic Maintain and improve existing code to keep applications reliable and efficient Apply software development best practices in daily work Collaborate closely with developers, designers, and product managers to deliver solutions that address real user needs Contribute to our agile development process and help the team adapt as we grow Tech and Collaboration This position offers the chance to work with modern technologies and frameworks. Teamwork is central: engineers, designers, and product managers work together to solve problems and build new features.

Join the Luo TeamLuoPay is a rapidly expanding leader in the FX and cross-border payments sector in Africa. We empower African enterprises to expedite payments to their international suppliers with enhanced transparency and competitive edges over traditional methods.Having established ourselves as a prominent player in several markets in record time, we are eager to expand our engineering team and continue developing the financial infrastructure for FX and cross-border payments across Africa.Role OverviewAs a Senior Full Stack Engineer, you will be an integral part of a skilled team, contributing to a variety of internal tools and customer-facing products. Your innovations will support a payment infrastructure that handles millions of euros in transactions daily.This role demands a customer-oriented approach and the ability to effectively communicate with both technical and non-technical stakeholders to achieve robust technical solutions.Key ResponsibilitiesDeliver products to both customers and internal teams (payment operations, treasury management, FX trading, compliance).Develop web applications using React.Create user-friendly interface designs.Design and implement HTTP APIs using Golang.Utilize AI-driven development methodologies.Qualifications6+ years of experience in web product development.Proficient in building APIs using Golang, Typescript, or other statically typed languages.Experience working within a small, fast-paced technical team.A product-oriented mindset with a focus on customer needs.Strong written and verbal communication skills.Ability to assess trade-offs and balance effort with impact.Systems Developed at LuoPayPayment platforms for businesses in Africa.Internal tools for payment operators, treasury analysts, and FX traders.AI usage for OCR and invoice approvals.KYC onboarding processes.Anti-Money Laundering and Transaction Monitoring systems.Core Banking and Ledger Systems.Automated payout systems with banking partners.

nexton is looking for a Fullstack Java / React Developer based in Paris. This position centers on developing and refining applications using both Java and React. Collaboration with colleagues from various teams is a key part of the job, with a focus on creating user-friendly interfaces and enhancing the overall user experience. What you will do Design and build applications with Java and React Work alongside cross-functional teams to develop interfaces Offer ideas to improve usability and boost user satisfaction Requirements Experience with backend development in Java and frontend work in React Interest in tackling complex problems with creative solutions Ability to thrive in a collaborative and evolving environment

Role Overview Capimoney is hiring a Staff Full Stack Engineer in Paris. This role focuses on building and maintaining applications that improve the financial experience for users and make financial processes more efficient. The work involves both front-end and back-end development. What You Will Do Design, develop, and maintain full-stack software applications Work with teams across disciplines to deliver reliable software Contribute to projects that support client needs and business goals Collaboration This position works closely with cross-functional teams to ensure solutions are high quality and align with client requirements.

Join our dynamic team at myjobcompany1 as a Lead International Java Developer (H/F). We are seeking an experienced and innovative professional to spearhead our Java development projects on an international scale. In this pivotal role, you will lead a team of talented developers, oversee the architecture and design of our software solutions, and ensure the delivery of high-quality code.Your expertise will drive the implementation of best practices in software development, while your leadership will inspire your team to achieve excellence. If you are passionate about technology and excited to work in a collaborative environment, we want to hear from you!

Located in the vibrant heart of Paris, Winamax is at the forefront of the online gaming industry. As a leader in poker and sports betting in France, we boast a community of 350,000 players and 600,000 monthly bettors. Our presence extends to Spain, Germany, and soon to Italy and Portugal. We are dedicated to providing our players with an exceptional experience that is technical, creative, and high-quality. Our core values of innovation, unity, and belonging foster a unique multicultural corporate culture.Imagine building your future in gaming!Technically, Winamax is:• A powerful and innovative gaming engine: dynamic adaptation of game offerings, highly configurable poker games, fraud detection.• A distributed and scalable architecture designed to handle real-time platform streams.• A modular platform that meets high availability and data security requirements, capable of managing significant traffic.ABOUT THE ROLEAs a member of our Tech team, you will play an active role in the development of the next generation of Winamax applications (desktop and mobile) and enhancing our cross-platform engine.This position is part of the Casino team responsible for developing Casino game clients (iOS, Android, Windows, Mac, Linux, Web).As a Senior Full-Stack Developer, you will be instrumental in designing, developing, and deploying our applications. Your responsibilities will include:• Developing innovative and scalable features for both front-end and back-end.• Producing robust code for real-time gambling applications.• Managing end-to-end processes: specifications, development, testing, and deployment.• Continuously improving software architecture and development best practices.

Join Alten as a Fullstack Java / Angular Developer (H/F) in the vibrant city of Paris! In this pivotal role, you will be responsible for designing and developing innovative software solutions using Java and Angular technologies. Collaborating with a dynamic team, you will contribute to the full software development lifecycle, from conceptualization to deployment.The ideal candidate will possess a strong understanding of both front-end and back-end development, demonstrating proficiency in Java and Angular frameworks. You will have the opportunity to work on exciting projects that drive technological advancements and improve user experiences.

Join our dynamic team at Talan as a Java Developer specializing in Financial Markets. In this role, you will leverage your expertise in Java programming to develop innovative solutions that meet the needs of our clients in the finance sector. Collaborating with cross-functional teams, you will contribute to the design, implementation, and optimization of robust financial applications.If you are passionate about technology and finance, and you thrive in a collaborative environment, we encourage you to apply!

Join our dynamic team at Meritis as a Java Developer specializing in financial markets. You will play a critical role in developing innovative software solutions that enhance financial transactions and market analysis. Your expertise will contribute to optimizing our financial products, ensuring they are robust and efficient. If you are passionate about technology and finance, we want to hear from you!

Everience is looking for an experienced Fullstack Developer in Paris with strong abilities in both Java and Angular. The role centers on building and maintaining web applications for a range of clients, with a focus on reliability and performance. Role overview Design and develop web applications using Java and Angular Maintain and enhance existing solutions to support stability and efficiency Collaborate with team members to address technical challenges and meet client requirements Requirements Professional experience working with Java and Angular Ability to contribute effectively within a team environment Interest in solving complex technical problems and delivering high-quality results Location This role is based in Paris.

About the RoleMaki is revolutionizing the field of talent acquisition and management through innovative AI-driven solutions. As a Software Engineer, you will take charge of the entire lifecycle of our AI products, ensuring their success from conception to deployment.Lead Technical Initiatives: Oversee and execute technical projects with a holistic full-stack approach, ensuring an optimal balance between speed and quality.Develop Reliable Systems: Create systems that maintain effectiveness despite unpredictable components, harnessing AI agents in real-world scenarios.Utilize Cutting-Edge Technologies: Keep our technology stack at the forefront by incorporating the latest advancements in Large Language Models (LLMs), vision models, and agent architectures.Collaborate Across Teams: Work with various stakeholders to pinpoint user challenges and engineer immediate solutions that enhance user experience.Who You AreWe seek dynamic, product-oriented full-stack engineers eager to make a significant impact and embrace ownership in a streamlined, high-performance team environment. You should be:Autonomous: A self-starter who drives projects to completion and thrives in leadership roles.Innovative: Passionate about AI technologies and keen to actively apply them in your work.Foundational: Interested in contributing to a high-growth journey by shaping our technology and culture from the ground up.Our Technology Stack:Backend:Typescript, Python, PostgreSQL, Google CloudFrontend:ReactJS, Typescript, GraphQLIf you're enthusiastic about transforming the future of AI-driven hiring, we want to hear from you!Recruitment ProcessMochi Screening: Experience our product firsthand.Interview with Hiring Manager.Coding Assessment.System Design Interview.Final Interview with the CEO.

Join our innovative team that is reshaping the future of global living.At The Flex, we envision a world where renting a home is instant, intelligent, and effortless — as seamless as booking a ride. Our ambitious goal is to enable anyone to live anywhere, anytime, without friction.Utilizing Base360.ai, our proprietary automation engine, we’re constructing the operating system for modern renting — integrating property data, orchestrating operations, and facilitating seamless stays across continents.If you are passionate about technical ownership, system architecture, and building platforms that function at real-world scale, this role places you at the heart of how millions of people move, live, and interact with the world.

Join Outsight, where our cutting-edge software transforms 3D LiDAR data into actionable insights for tracking the movement of individuals and vehicles. Our solutions are utilized by a variety of transportation hubs, including airports and train stations, as well as sports venues, road infrastructures, and industrial sites. We empower operators with precise and anonymous Spatial Intelligence data to enhance operational efficiency and ensure user safety and satisfaction. Our diverse team of experts, spanning across Paris, San Francisco, Sophia-Antipolis, and Hong Kong, is dedicated to advancing our innovative solutions. With a commercial office in Spain, we are committed to our global outreach. Discover more about us through this link: Insights about Outsight. Trusted by leading airports and train stations worldwide, our Passenger Flow Traffic Monitoring solution is a cornerstone of our offerings. Our Car Traffic Remote Monitoring product has also gained the confidence of Tier 1 clients, including BMW. Role Overview We are seeking a vital contributor to our Outsight Shift product suite. Our ecosystem encompasses real-time 3D monitoring of digital twins, live analytics, and decision support tools designed to optimize user management of people and vehicle flows. In this role, you will play a crucial part in architecting our application and frontend foundations to ensure scalability as our product capabilities expand. You will emphasize design, performance, usability, and maintainability while collaborating closely with product managers, data engineers, and scientists to deliver seamless user experiences.

Qonto is building a new internal People platform to support over 1,700 team members. This freelance Full-Stack Engineer role centers on designing and delivering a ground-up application for HR operations, including compensation cycles and performance reviews. The position is based in Paris and involves close collaboration with Mélodie, Head of People Systems, and the broader People team. What you will do Deliver the MVP by November 2026: Lead the migration of key Workday modules into a custom application. The stack uses React for the front end and Python or Go for the back end. The platform will manage sensitive HR workflows for more than 1,700 users, so timely and high-quality delivery is critical. Shape the product vision and roadmap: Partner with People teams to conduct user discovery, challenge specifications, and help prioritize features. Decision-making covers both what to build and how it is built. Prioritize security and compliance: Design systems to handle sensitive personal data, ensuring GDPR compliance and enforcing strong access controls and data residency standards from the start. Accelerate with AI tools: Use tools such as Cursor, Claude Code, and Copilot to speed up development. Where relevant, incorporate AI-powered features into the platform. Requirements Experience building full-stack applications with React and either Python or Go. Ability to work independently and drive a project from concept to production. Comfort working closely with non-technical stakeholders to shape product direction. Strong focus on data security and compliance. This project is not just about supporting existing systems. It offers the chance to build a new platform from scratch, with real input into both technical and product decisions. Qonto values diversity and evaluates candidates based on skills and potential. Read more about Qonto's approach to fair hiring.

At The Flex, we envision a future where renting a home is as instantaneous, intelligent, and hassle-free as booking a ride.Our ambitious goal is to empower individuals to live anywhere, at any time, without the usual barriers.Driven by our innovative Base360.ai automation platform, we are crafting the ultimate operating system for modern rentals — seamlessly integrating property data, streamlining operations, and facilitating effortless stays worldwide.If you are passionate about web technologies, API-driven solutions, automation, and scalable operations, this is your chance to influence how millions navigate, reside, and engage with the world. What You’ll BuildAs a Full-Stack Engineer (Web & APIs), you will be responsible for designing, developing, and scaling the essential web applications and APIs that drive The Flex platform — enabling immediate bookings, smart access, automated workflows, and predictive operations.Your role will encompass all aspects of frontend design, backend development, and cloud infrastructure, transforming intricate operational hurdles into elegant, scalable, and API-centric solutions.You won’t merely deploy features.You will enhance efficiency, unlock automation, and lay the groundwork for a sophisticated, global rental network. Your MissionBuild the PlatformCreate fast, dependable, and scalable web applications and APIs that facilitate bookings, payments, availability, and guest interactions.Design API-First SystemsDevelop robust, well-documented APIs that connect Base360.ai to internal systems and external partners.Automate at ScaleConstruct event-driven services and automated workflows to eradicate manual processes across the organization.Connect the EcosystemImplement impactful integrations with partners including Airbnb, Stripe, Hostaway, and Twilio.Deploy with ConfidenceLaunch and maintain serverless infrastructure on AWS, optimized for speed, reliability, and global reach.Solve Real ProblemsAddress challenges such as real-time booking synchronization, pricing intelligence, keyless access systems, AI-driven alerts, and live operational dashboards.Build With PurposeWork closely with product, data, and operations teams to transform concepts into tangible, measurable outcomes.

As a Lead Java Technical Expert at Capfi Technology, you will:Lead the development of containerized back-end or full-stack applications, including microservices, adhering to craftsman practices (TDD, BDD, DDD).Analyze architecture to identify and assess improvements.Design and develop high-quality Java applications.Implement continuous integration using automated testing tools (Jenkins, GitLab, Bitbucket) and facilitate continuous deployment (Ansible, AWX, Octopus, GitLab).Manage version control (Git, TFS), create test documentation, and participate in testing not covered by unit tests.

Who Are We?Xcelirate is at the forefront of technology, creating innovative platforms that serve thousands of users every minute! We pride ourselves on cultivating an environment where leading developers collaborate to strategically plan and swiftly execute initiatives that solidify our market leadership and fuel our global expansion. Our decade-long growth is a testament to our dedicated customers and the talented team that drives this success.What Are We Looking For?We are seeking a Principal Full-Stack Engineer who has not only navigated the complexities of software development but also played a pivotal role in shaping architectural decisions. Your extensive experience means you view programming languages as mere tools that facilitate the translation of ideas into executable code—selecting them based on practicality rather than trends. You understand that innovation comes from progress, not just novelty.Your journey has equipped you with a wealth of knowledge, including when to abandon outdated practices and embrace more efficient solutions. You are deeply engaged in coding, preferring to remain close to the technology rather than stepping into management roles unless necessary.With a calm and methodical approach to problem-solving, you bring stability to any project. When you join a team, chaos subsides, making way for clearer decision-making and improved collaboration. Your intuitive grasp of key concepts such as optimization and lazy initialization is impressive, and your ongoing home lab projects showcase your curiosity and passion for continuous learning.If this resonates with you, consider applying for this role!What Will You Be Doing?Manage your time effectively while aligning with company priorities.Take ownership of complex engineering challenges from initial problem identification through design, delivery, and iterative improvements.Ensure critical platform components remain reliable, efficient, and maintainable.Develop new features and enhance existing functionalities across our platforms.Refactor codebases to improve performance and maintainability.

Role Overview Quadient is looking for a Full Stack Software Engineer to join the Research & Development team in Paris. This position focuses on building and improving software that strengthens our product lineup and supports customer needs. Collaboration with colleagues from different specialties is a key part of the job. Main Responsibilities Design and develop scalable web applications. Work alongside UX/UI designers to shape user-friendly interfaces. Take part in code reviews and help uphold strong coding standards. Join Agile ceremonies and contribute to project planning and delivery.