Senior Software Engineer - Kotlin, Java, AWS (m|w|d)

Join us at Delivery Hero as an Engineering Manager specializing in Java/Kotlin for our Logistics Workforce Tribe. We are dedicated to delivering exceptional experiences and are looking for a leader to help us achieve this goal.As part of our Logistics Team, you will address significant challenges to enhance last-mile delivery, making it more efficient, affordable, and sustainable. Your contributions will directly enhance the experiences of riders, end customers, and merchants worldwide. Each improvement you implement will assist Delivery Hero in optimizing our delivery operations, facilitating our expansion into new sectors such as grocery and retail.The Workforce Tribe Team:Riders serve as the backbone of our last-mile delivery, enabling the fulfillment of millions of orders daily.Our Workforce Tribe is responsible for managing gross and net earnings, a wallet for riders to withdraw their earnings, staffing and work scheduling, performance management, loyalty programs, personalized campaigns and goals, recruitment of new riders, and document management for our million-strong rider community.The rider experience with Delivery Hero is our core metric, and you will be at the helm of one of the squads that directly influences this metric.Your Role:Collaborate with your product counterpart to provide technical guidance to your team, facilitating the design of feasible and iterative solutions that align with our business needs.Take ownership of the technical metrics and KPIs for your team, ensuring complete visibility, monitoring, and alerting.Enhance and support the incident resolution process and the team's on-call practices.Mentor junior team members, providing both technical and non-technical guidance.Manage relationships with both technical and non-technical stakeholders, effectively navigating and resolving challenges.

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.

At Flix, we foster a technology-driven culture where creativity meets significant real-world applications. We offer competitive compensation, ample opportunities for professional advancement, and a collaborative environment that encourages ownership and innovation.We are on the lookout for a Software Engineer (Kotlin, Java) with robust Kotlin (or Java with a willingness to learn Kotlin) expertise to become a key member of our Capacity Management team in the Demand Division. The Capacity Management team is responsible for developing and maintaining systems that allocate, price, and manage seat availability across Flix. Our team handles high-throughput, real-time data pipelines and event-driven microservices to ensure smooth operations, even in unpredictable situations.As a Software Engineer at Flix, you will have the opportunity to influence systems that directly affect how millions of passengers book their seats and optimize Flix's capacity across our global network in real-time.Our tech stackLanguages & Frameworks: Kotlin, Spring Boot, Akka/PekkoData & Messaging: PostgreSQL, Kafka

Join our Clickout-to-Revenue Team, where you'll be integral to our core business model: merchants pay for qualified redirects ("Clickouts") to their shops. Your role will ensure that this monetization operates smoothly, efficiently, and transparently, significantly contributing to idealos' growth.Your ResponsibilitiesEnd-to-End Responsibility You will develop and manage business and web applications in the AWS Cloud. Together with your team, you will oversee the entire value chain (YBYO): architecture, infrastructure, development, testing, security, deployment, monitoring, on-call duties, and maintenance. Product Focus: Monetization Processes and Services You will develop services for the representation and billing of our business models. Key components include the ERP system Odoo, internal data management tools, and interfaces to Salesforce and SAP. Innovative business models require innovative solutions; hence, you will closely collaborate with stakeholders such as our accounting, sales teams, account management, and other cross-functional engineering teams. Technical Excellence You will actively contribute ideas for process improvements, emphasize high code quality, and engage in continuous personal development – we support you with various training opportunities.

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.

About the Role scalablegmbh is looking for a Senior Kotlin / Java Software Engineer focused on Application Framework development in Berlin. This position centers on designing and building scalable applications that support core business functions. The work directly influences our technology choices and strengthens the software we deliver.

flix is hiring a Full-stack Engineer to join the Payments Team in Berlin. This team develops and maintains the systems that process payments, focusing on both a smooth user experience and the company’s business needs. Java and Kotlin are key technologies in this role. What you will do Collaborate with colleagues across disciplines to design, build, and launch new payment features Support and enhance the systems that process payments for flix customers Share ideas and technical knowledge to help shape the direction of the payment platform Requirements Strong experience with Java and Kotlin Interest in building payment solutions Ability to work onsite in Berlin Location This role is based 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.

JetBrains has developed tools for software teams since 2000. By automating routine checks and corrections, JetBrains products help developers focus on building and shipping software. The goal: make development more productive and creative. Role overview This Backend Customer Success Engineer role centers on supporting engineering teams as they adopt Kotlin for backend development. The position focuses on helping organizations successfully bring Kotlin into production environments. What you will do Guide organizations through the process of moving from Java to Kotlin, assisting with migration, integration, and scaling. Troubleshoot technical challenges that arise during the transition and support teams as they progress from initial experimentation to stable production use. Work with potential users to clarify how Kotlin adoption works and help design migration plans that fit their specific needs. Locations Amsterdam, Netherlands Berlin, Germany Munich, Germany Prague, Czech Republic Remote, Germany

Join Our Innovative TeamAt SumUp, we provide powerful Point-of-Sale (POS) solutions that empower diverse businesses such as cafes, shops, bars, and salons to thrive. Our platform features robust tools for product management, inventory oversight, business analytics, regulatory compliance, and customer loyalty programs.Our advanced POS solution is seamlessly integrated into the SumUp SuperApp, supporting both our proprietary hardware and a variety of mobile devices.As an Android Developer, you will work alongside a talented, cross-functional team comprising Product Managers, Designers, Engineering Managers, and fellow developers.Your RoleWe are transitioning to a Kotlin Multiplatform (KMP) strategy to facilitate shared development for both Android and iOS applications. In this dynamic role, you will gain expertise, refine your skills, and contribute to the evolution of our mobile applications.You are a developer who prioritizes user-centric design, values clear communication, and excels in collaborative environments.On-site Collaboration in BerlinWe believe that in-person interactions drive innovation and teamwork, making this role exclusively on-site in Berlin.Your ResponsibilitiesDevelop and enhance features for the item catalog within the SumUp SuperApp.Contribute to the architectural improvement of the application while supporting our Kotlin Multiplatform initiative.Maintain and enhance our unified Android application, serving over 60 countries and ensuring high-quality, scalable solutions.Identify areas for enhancement, influencing product evolution and participating in daily decision-making.Create comprehensive documentation and execute thorough testing for new features prior to deployment.Work closely with Designers, Product Managers, and Android engineers to provide a cohesive user experience across platforms.Mentor and coach junior engineers.Who You AreYou possess 3+ years of experience in mobile engineering, specifically with Android and Kotlin.You have 2+ years of experience utilizing Jetpack Compose.You have a strong understanding of software design patterns (e.g., MVVM, MVI) and are skilled in creating modular, scalable app architectures.You are passionate about user-centric design and thrive in a collaborative environment.

About Our Team At SumUp, we provide a cutting-edge Point-of-Sale (POS) solution that empowers businesses such as cafes, shops, bars, and hair salons to operate seamlessly and grow. Our platform boasts a vast array of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our POS solution integrates flawlessly into the SumUp SuperApp, which is compatible with our proprietary register hardware as well as mobile devices like tablets and smartphones. As a Senior Android Developer, you will work alongside an innovative, cross-functional team consisting of Product Managers, Product Designers, Engineering Managers, and fellow developers. About the Role We are transitioning towards a Kotlin Multiplatform (KMP) strategy, facilitating shared development between Android and iOS. In this role, you will gain experience with this technology, helping to shape the future of our mobile applications. If you are a developer who prioritizes user-centric design, precision, and effective collaboration, you will thrive here. You bring structure to communication and flourish within a cross-functional environment. This position is based in Berlin, where face-to-face interactions fuel innovation and teamwork. Your Responsibilities Develop new features for the item catalog within the SumUp SuperApp Improve application architecture and actively contribute to our Kotlin Multiplatform strategy Enhance and maintain our unified Android app, utilized in over 60 countries, ensuring high-quality and scalable solutions Drive product evolution by identifying improvement opportunities and participating in daily decision-making Create comprehensive documentation and implement thorough testing for features prior to release Work closely with Designers, Product Managers, and Android engineers to ensure a cohesive UX experience across platforms Mentor and coach junior engineers You Will Excel in This Role If: You possess 8+ years of experience in mobile engineering, particularly with Android and Kotlin. You have 2+ years of experience with Jetpack Compose. You have a strong grasp of software design patterns (e.g., MVVM, MVI) and expertise in creating modular, scalable app architectures. You are knowledgeable about reactive programming (Flow, Coroutines, and Concurrency).

JetBrains s.r.o. creates tools that help developers automate repetitive tasks so they can focus on writing quality code. Since 2000, the company has aimed to make software development more productive and enjoyable for engineers worldwide. Role overview The Customer Success Engineer - Kotlin Multiplatform (KMP) supports engineering teams as they adopt KMP in real-world projects. This role guides organizations from their first evaluation through to successful deployment. Along the way, it gathers feedback and collaborates closely with JetBrains product teams to help shape the future of KMP. What you will do Work directly with organizations at various stages of KMP adoption, from initial exploration to production rollout. Assist teams in migrating, integrating, and scaling shared codebases using Kotlin Multiplatform. Support teams moving from experimentation to production and help address technical challenges as they arise. Reach out to potential users who could benefit from adopting KMP. Identify each customer’s technical needs, use cases, and any barriers to adoption. Advise on architecture, feasibility, and strategies for implementing KMP. Collect structured feedback and insights from clients. Collaborate with JetBrains product and engineering teams to influence the KMP roadmap and improve available tooling. Common questions you'll help solve What is the safest way to migrate a large Android app to shared logic? How much code sharing is practical or advisable? How can teams address resistance from iOS developers working with Kotlin APIs? What’s the best way to organize a codebase for collaboration across teams? How can teams resolve slower build times after introducing KMP? How success is measured Organizations deliver Kotlin Multiplatform in production environments. Teams increase their use of shared code over time. KMP adoption continues beyond initial trials. User feedback results in tangible improvements to KMP and its tooling. Requirements Experience working with Kotlin, either for Android or backend development. Understanding of mobile architectures on both Android and iOS, especially with Kotlin. Strong communication skills and a knack for problem solving. Background with cloud technologies and CI/CD pipelines. Ability to collaborate effectively within a team-driven environment. Location This position is available in Amsterdam (Netherlands), Berlin or Munich (Germany), or remote within Germany.

Join Flix, where technology and innovation collide to create real-world solutions. We offer competitive compensation, extensive growth prospects, and a collaborative culture that emphasizes ownership and teamwork.As a Full-stack Engineer with a robust backend focus in Kotlin, you will play a key role in shaping the future of payments for sustainable and intelligent mobility.You will be part of our Payments Team, which is central to our checkout experience within the Demand Division. Your contributions will directly influence how millions of users process their payments, the speed of their transactions, and our overall revenue generation.We are constantly striving to enhance payment authorization and conversion rates, boost payment efficiency, and ensure data integrity. At the same time, we are integrating local payment methods across various markets and overcoming intricate engineering challenges.Our core services are developed using Kotlin and Spring Boot, while our interfaces utilize TypeScript and React.js. We also manage some legacy PHP systems; while a passion for PHP isn't necessary, a willingness to engage with it when required is appreciated.

Why choose voize? We are more than just an employer!At voize, we prioritize giving frontline workers the invaluable gift of time—time to care, connect, and truly be present. Unfortunately, much of that time is consumed by administrative tasks that detract from what truly matters: the people.We are revolutionizing this by developing an AI companion that liberates nurses from administrative burdens, allowing them to reclaim up to 30% of their time. Our mission is not to replace human effort but to enhance it, amplifying their impact in the care sector. Currently, over 1,100 care facilities trust voize, and more than 75,000 nurses depend on our AI companion to streamline their daily responsibilities.Supported by a robust $50M Series A funding round led by Balderton Capital, with contributions from HV Capital, Y Combinator, and other prominent VCs, our mission is grounded in technological innovation with a profound social impact. Join us in this transformative journey!

Join Sixt SE as the Head of Workforce Management, where you will lead our team in optimizing customer service operations to enhance efficiency and customer satisfaction. You will be responsible for strategic planning and execution of workforce management initiatives that align with company goals.

Join Our Team as a Senior Full-Stack Engineer!Are you a driven and inquisitive Senior Full-Stack Engineer (Java/Kotlin)? We invite you to become an integral part of our Supply Division at Flix and elevate the customer station experience to unprecedented heights!As our network continues to expand, Flix customers across the globe anticipate a smooth and enjoyable experience at our stations during their travels. Our self-organized, cross-functional, and distributed team develops innovative solutions to empower Flix station managers in efficiently managing station inventory, which is essential for numerous internal tech teams at Flix, ultimately enhancing the overall experience for millions of passengers.In this role, you will be instrumental in shaping the product landscape by spearheading innovation, tackling complex challenges, and leaving a significant impact on our organization.

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.

At JetBrains, we are passionate about code. Since our inception in 2000, we have dedicated ourselves to creating the most powerful and effective developer tools available. By automating routine checks and corrections, our tools enhance productivity, enabling developers to innovate and create freely. Kotlin, a modern programming language developed by JetBrains, targets Java, Android, JavaScript, and native platforms. Since its introduction in 2016, Kotlin has rapidly gained traction, becoming the official language for Android development and receiving support from numerous frameworks, engines, and tools. With Kotlin Multiplatform and Compose Multiplatform, our mission is to empower Android developers to create exceptional multiplatform applications. The Kotlin Multiplatform Tooling team is at the forefront of this initiative, developing tools that simplify the process. We are actively working on Kotlin Multiplatform plugins for IntelliJ IDEA and Android Studio, alongside enhancing IntelliJ IDEA's Android support, KDoctor, and the Kotlin Multiplatform wizard. We are looking for a passionate Android developer who can share their insights and experience with our team while contributing to the development of tools that they have always envisioned. Our international and friendly team welcomes applicants who share our enthusiasm for coding.

Join our dynamic team as a Senior Backend Engineer and play a pivotal role in developing cutting-edge applications that leverage Kotlin, Spring Boot, and AWS. You will work closely with cross-functional teams to architect and optimize backend systems that meet the demands of our growing user base.