Senior Java Backend Engineer (m/f/x)

Atolls is the world’s largest community-driven shopping platform, active in over 20 markets.We empower millions to make informed spending choices across discovery, evaluation, and (re-)purchase by connecting individuals with the ideal brands and retailers.Our team of 1,000+ members across 10 countries develops products utilized daily on a global scale, providing you with genuine ownership and the chance to witness your impact. Are you ready to help shape the destinations people trust for confident shopping? We invite you to learn more.About This Role:We are on the lookout for a Senior Java Backend Engineer to become an integral part of our expanding engineering team in Berlin. In this pivotal role, you will be responsible for designing, developing, and scaling high-performance backend systems utilizing contemporary Java technologies and cloud-native architectures. This position is perfect for individuals who thrive on tackling complex systems, prioritize code quality, and possess a robust architectural mindset.Our Benefits:At Atolls, we are committed to fostering both your professional and personal development. Here’s what you can look forward to:A culture that champions personal and professional growth, alongside opportunities for internal mobility.A supportive and open-minded team that welcomes diverse perspectives and innovative concepts.32 days of paid vacation plus an additional day off for your birthday, ensuring you have ample time to recharge.A flexible hybrid working model to help you find the right balance between work and life.Access to a learning budget and internal training to enhance your skills in your role.Mental health coaching to promote your well-being.Regular global and local gatherings to celebrate achievements and strengthen connections.The chance to take a sabbatical after three years with the company.A cloud-based company setup, allowing flexibility and collaboration regardless of your location.*These are global benefits applicable to all employees, with additional local perks based on your location.Responsibilities:As a Senior Java Backend Engineer, you will...

About Us Join our dynamic international team at Doctolib, based in Berlin, where we are devoted to enhancing the performance, features, and design of our essential healthcare product, the Scheduling System. Over the past decade, Doctolib has experienced remarkable growth by prioritizing pragmatic solutions and avoiding unnecessary optimizations. To sustain our momentum, we are focusing on performance as a key priority and are continuously evolving the architecture of our core features to accommodate future demands. We are currently re-engineering our Appointments Management Service from the ground up, utilizing modern event-driven, distributed technologies in line with our updated technology strategy. This pivotal service will revolutionize the way Care Teams manage appointments, ensuring patients receive quicker access to care.

Join our innovative team at redcare-pharmacy as a Senior Backend Engineer and play a pivotal role in developing cutting-edge backend solutions. You will work closely with cross-functional teams to design, implement, and maintain robust systems that enhance our pharmacy services.

idealo is looking for a Senior Backend Software Engineer (m|w|d) to join the team in Berlin. This role focuses on building and operating the backend for our mobile app, which helps millions of users compare prices and shop smarter. The team takes full ownership of technical implementation, operations, and strategic direction for our services, with a strong commitment to delivering a seamless experience for mobile shoppers. Role overview This position centers on end-to-end responsibility for business and web services in the AWS Cloud. The team manages the full lifecycle of these services, from architecture and infrastructure to development, testing, deployment, monitoring, and on-call support. The goal is to ensure stability, scalability, and high performance, especially during periods of heavy traffic. What you will do Develop and operate backend services in AWS Cloud for the mobile app Design and implement APIs (REST/GraphQL) for Android and iOS applications Make architectural decisions for backend systems, including microservices Enhance cloud infrastructure using tools such as Terraform and Kubernetes Maintain high code quality through testing, code reviews, and monitoring Identify and address technical debt Introduce new technologies and improve development workflows (CI/CD, automation, AI tools) Collaboration and impact Work closely with mobile engineers and backend colleagues Contribute to technical discussions and challenge existing solutions Share knowledge through pair programming, code reviews, and tech talks Communicate complex technical topics to non-technical stakeholders Participate in on-call rotations and take responsibility during critical incidents

Be a Part of Our Vision at Doctolib!Your RoleWe are seeking a dedicated Senior Backend Software Engineer to join our newly established team focusing on user rights and permission management. In this pivotal role, you will set the benchmark for access control within the Doctolib platform, safeguarding sensitive user and financial data while facilitating efficient workflows for healthcare professionals.Your key responsibilities will include:Developing Advanced Authorization Systems: Create and deploy scalable authorization frameworks, incorporating role-based and API-driven controls that cater to both clinical and financial functionalities.Modernizing Legacy Systems: Streamline and enhance legacy access models (such as EHR authorizations) to ensure compliance with data protection and privacy regulations.Cross-functional Collaboration: Partner closely with product, legal, and data protection teams to deliver privacy-compliant solutions.API Development: Design and manage robust APIs for permissions and authorization, enabling extensive platform integration.Implementing Access Control: Establish access control measures for emerging roles, such as Medical Front Assistant and new Clinical & Financial administrative positions.About Our Technology LandscapeOur solutions are built on a fully cloud-native platform supporting web and mobile app interfaces, multilingual capabilities, and tailored to meet country and healthcare specialty requirements. We are modularizing our platform to operate within a distributed architecture through reusable components.Our technology stack includes Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native.We utilize AI ethically across our products to empower both patients and healthcare professionals. Discover our AI vision here and learn about our inaugural AI hackathon here!

Doctolib is hiring a Software Engineer with solid experience in Java and Kotlin. This position is based in Berlin and centers on building digital products that support both patients and healthcare professionals across Europe. Role overview This role involves working on software that aims to improve healthcare access and efficiency. The team values collaboration and a shared commitment to making a difference in the medical field. What you will do Collaborate with team members to design and implement new product features Develop and maintain applications using Java and Kotlin Help create solutions that make healthcare services easier to access and manage Location This role is based in Berlin, Germany.

We are seeking an experienced Senior Backend Engineer to join our dynamic team at redcare-pharmacy. In this role, you will be responsible for designing and implementing robust backend systems for our mobile applications. The ideal candidate will have a strong background in backend development and a passion for creating efficient, scalable solutions.

Join our innovative team at redcare-pharmacy as a Senior Java Engineer. In this pivotal role, you will leverage your expertise in Java programming to develop robust, scalable applications that enhance our digital pharmacy solutions. Collaborate with cross-functional teams to drive the design and implementation of high-quality software solutions.We are looking for a proactive and detail-oriented engineer who thrives in a dynamic environment and is passionate about problem-solving. If you are ready to make a significant impact in the healthcare technology space, we want to hear from you!

As an established IT service provider, we create modern, scalable software solutions for clients across various industries. We leverage the latest technologies, agile methodologies, and a passionate team dedicated to crafting digital products. We are looking to strengthen our team with experienced Senior Backend Developers / IT Consultants (m/f/d) who love technological diversity, enjoy holistic problem-solving, and provide competent consulting to our clients.You will develop end-to-end solutions that deliver real value to our clients while actively designing microservices and modern software architectures.You will build and operate high-performance backend services using Java or Kotlin, utilizing Spring Boot for complex software implementation, and reliably integrating databases and external interfaces.You are committed to high software quality, employing automated testing and clean code principles.You will confidently guide clients through architecture, technology, and implementation questions, translating technical concepts into understandable terms.You will collaborate closely with UX/UI designers, product owners, and developers from other disciplines, actively contributing to agile teams.You will conduct code reviews, provide constructive feedback, and ensure adherence to best practices, architectural guidelines, and high code quality within the team.

About the Role scalablegmbh is hiring a Senior Kotlin / Java Software Engineer for the Client Technology team in Berlin. This role focuses on building and improving applications that support client services. The work centers on designing, developing, and maintaining high-performance systems using Kotlin and Java. What You Will Do Design and develop applications that improve client-facing technology Collaborate with engineers and stakeholders to deliver reliable solutions Apply expertise in Kotlin and Java to solve complex technical challenges Who We’re Looking For Strong experience with Kotlin and Java Comfort working in a collaborative team setting Motivation to take on challenging projects that impact client success This position offers the chance to make a direct impact on client outcomes while working with a skilled team in Berlin.

Join our dynamic team to develop an innovative banking platform leveraging cutting-edge technologies and modern software development methodologies.Collaborate with a passionate group of software engineers and academics dedicated to revolutionizing the financial sector.Transform complex business challenges into effective technical solutions.Design and establish connections with major financial industry players to integrate Scalable Capital with the broader financial ecosystem.

Join Our Innovative TeamAt SumUp, we are revolutionizing the way businesses operate with our cutting-edge Point-of-Sale (POS) solution. Catering to cafes, shops, bars, hair salons, and various enterprises, our platform streamlines operations with features such as product catalogs, inventory management, insightful business analytics, compliance support, and customer loyalty tools.As a vital part of our Fiscalization team, you will play a crucial role in ensuring fiscal compliance across several European countries including Italy, Sweden, Norway, Belgium, Austria, and more. Your expertise will help pave the way for integrating third-party services and fiscalizing receipts efficiently.In your role as a Senior Backend Engineer, you will work alongside a talented, cross-functional team comprising Product Managers, Product Designers, Engineering Managers, and fellow engineers to tackle complex challenges and deliver tailored solutions.

About the CompanyAndercore is an innovative AI-powered trading platform revolutionizing the industrial supply chain for infrastructure, energy, and construction materials. We connect thoroughly vetted suppliers from Asia, Europe, and the GCC region with local demand through a seamless integrated platform.Our proprietary AI technology digitizes and automates the entire lifecycle of materials trade—covering procurement, pricing, inventory management, logistics, and embedded financing—thus transforming countless manual processes into real-time, orchestrated workflows.Buyers enjoy instant quotes, dependable availability, and predictable delivery via our unified operating system. Suppliers benefit from precise forecasting, effective demand management, and smooth integration into cross-border fulfillment networks. We collaborate with leading brands to execute both dropship and cross-dock fulfillment strategies for large-scale transactions, turning global supply chains into predictable, repeatable, software-driven workflows.Having achieved triple-digit million GMV and operating in six international markets, we are swiftly moving towards profitability. With a diverse team of over 80 members based in Berlin and Asia, we are on a mission to build the world’s first industrial-grade AI operating system for materials—redefining the dynamics of global trade in one of the most critical industries.Backed by top-tier investors and global banking partners, we recently secured a $40 million Series B funding round led by Atomico, Project A, and Invent Capital, supported by institutional backing from Commerzbank and KfW.About the RoleAs a Senior Backend Engineer, you will serve as a technical pillar within our team, expected to lead by example, influence architectural decisions, and elevate the quality of our deliverables. You will work autonomously while remaining deeply embedded in a collaborative engineering culture.Tech Stack: Java 21 (Spring Boot 3), Python, LangGraph, LLM APIs (OpenAI, Anthropic, Gemini), PostgreSQL, Kinesis, AWS, Terraform, GitHub Actions, Node.js, TypeScript, Next.js, React.

Your Role We are seeking a skilled Backend Engineer with a strong interest in telecommunications and a deep passion for software development, particularly in big data technologies. In this role, you will be pivotal in the real-time processing of our data, driving microservices and fostering a fully data-driven environment within the company. This position can be based in our emnify offices located in Berlin or Würzburg, or remotely from Germany or Poland. Your Impact Collaborate within one of our service squads, taking charge of designing, building, testing, and managing components or projects that influence the pricing and charging mechanisms at emnify. Develop APIs and real-time data processing applications utilizing streaming technologies within the Apache Kafka ecosystem, prioritizing scalability and reliability. Engage with a team on core telecommunication functions such as automated product lifecycle management in a modern cloud-based setting. Architect and design aforementioned components to operate on AWS in a scalable manner. As part of a collaborative team, you will be responsible for deploying and managing these applications using CI/CD tools such as Jenkins and Terraform, along with monitoring solutions like Grafana and Prometheus. Your Skills Proven experience in full-cycle engineering from Proof of Concept (POC) to production with JVM-based languages, preferably Scala, as a significant portion of our codebase is in Scala. Demonstrated experience in stream/data processing, cloud computing, and API development. Strong understanding of microservices architecture and design principles. Excellent problem-solving abilities and a proactive approach to challenges. Ability to work effectively within a diverse team.

We are currently partnering with several cutting-edge startups in search of talented Backend Engineers to enhance their existing teams. Our reputation for delivering excellent candidates through referrals has established our clients as outstanding employers, offering the opportunity to work on exciting projects within dynamic international teams.

Role overview Taktile supports banks and fintech companies by automating key decisions such as credit checks and risk assessments. The Senior Backend Engineer on Team Decide focuses on building and improving the distributed execution engine that drives customer workflows. This engine forms the foundation of Taktile’s automated decision-making platform. What you will do Design and implement backend systems for distributed workflow execution Take ownership of critical systems throughout their lifecycle, from architecture to deployment Collaborate with a small, dedicated team where each engineer’s perspective directly influences the product Address complex backend problems specific to automated decision-making in financial technology Location This role is based in Taktile’s Berlin office.

P-1327 At Databricks, we are driven by a passion for empowering data teams to tackle some of the world’s most complex challenges. From revolutionizing transportation methods to speeding up medical innovations, our mission is to build and operate the leading data and AI infrastructure platform, enabling our customers to leverage profound data insights to enhance their business. Established by engineers, Databricks is embarking on an ambitious journey to develop the most advanced Lakehouse Platform. While we have a solid foundation, we aim to elevate our offerings to create significantly improved products. Our goal is to reimagine every component to provide our customers with the fastest, most user-friendly, and secure data platform for all their data workloads. As a Senior Software Engineer, you will be a key member of our Berlin site and play a pivotal role in our multi-year mission to realize our Lakehouse vision. You will engage in the entire development lifecycle and embody the core values of Databricks. The impact you will have: Our backend teams operate across various domains within our essential service platforms. You may encounter challenges such as: Addressing issues that encompass product development and infrastructure, including distributed systems, scalable service architecture, monitoring, workflow orchestration, and enhancing developer experience. Creating reliable, secure, and high-performance services and client libraries for managing and accessing massive amounts of data on cloud storage solutions, such as AWS S3, GCS, and Azure Blob Store. Developing product features that empower our customers to efficiently store and access their data.

About GetYourGuideGetYourGuide stands as the world's leading marketplace for unforgettable travel experiences. Travelers utilize our platform to uncover the best activities in their chosen destination. Since our inception in 2009, over 150 million tours, activities, and attraction tickets have been booked through GetYourGuide by adventurers from around the globe. With a dedicated global team of more than 800 travel experts and technologists, we are proudly headquartered in Berlin, complemented by 17 local offices worldwide.The Mission:At GetYourGuide, technology is the driving force behind our growth. Our work within the Marketplace is transforming global travel experiences, and we invite you to join us in this endeavor.The features we develop facilitate seamless bookings for our customers while empowering our partners to expand their businesses. This complex task presents a remarkable opportunity to create extraordinary solutions that impact global travel. From building supplier infrastructures that enhance our partners' businesses to innovating marketplace features that propel our growth, you will have the chance to craft incredible solutions at GetYourGuide.Whether you're engaged in developing dynamic search algorithms or designing new features to accelerate our company's growth, your contributions will leave a lasting impact. Our teams consistently push boundaries, exploring innovative ways to bring the magic of travel to people around the world.We operate in cross-functional mission teams composed of backend and full-stack engineers, mobile engineers, data engineers, product managers, and designers.

Role overview Delivery Hero SE seeks a Senior Backend Engineer to join its AdTech team in Berlin. The focus is on developing and maintaining backend systems that power advertising technology products and services. What you will do Design and build scalable backend systems tailored for AdTech applications. Collaborate with engineers, product managers, and cross-functional teams to deliver features that enhance performance and user engagement. Create solutions that adapt to evolving customer and business requirements. Location This position is based in Berlin.

About the CompanyThe AI-powered trading platform revolutionizing industrial supply in infrastructure, energy, and construction materials. It seamlessly connects trusted suppliers across Asia, Europe, and the GCC region with local demand through a unified platform.Our proprietary AI technology digitizes and automates the entire lifecycle of materials trade—from procurement and pricing to inventory management, logistics, and integrated financing—eliminating thousands of manual, relationship-dependent processes with real-time orchestration.Buyers receive instant quotes, reliable availability, and predictable delivery through our cohesive operating system. Suppliers enjoy precise forecasting, disciplined demand management, and effortless integration into cross-border fulfillment networks. We partner with prominent brands to facilitate both dropship and cross-dock fulfillment for large-scale transactions, transforming global supply chains into predictable, repeatable, software-like workflows.Supported by top-tier investors and financing partners, we have achieved triple-digit-million GMV, operate across six international markets, and are rapidly moving towards profitability. With a growing team of over 80 individuals based in Berlin (our headquarters) and Asia, we are developing the world’s first industrial-grade AI operating system for materials—redefining the workings of global trade in one of the most substantial and vital industries.