Senior Android Developer at Atolls | Berlin

About the RoleJoin SumUp as a Senior Embedded Engineer within our Hardware Tribe, where you will collaborate with a talented cross-functional team of Hardware Engineers, Product Managers, QA Engineers, and more. Your expertise will be pivotal in developing our innovative Android-based payment devices, guiding the process from bootloader and kernel development to framework integration and validation.This is an exciting opportunity as we transition to using the Android platform for our proprietary hardware solutions. Our payment devices are uniquely designed with a focus on security and customization, necessitating a profound understanding of both embedded hardware and software.This position requires on-site presence in our Berlin office, as we value the organic interactions that emerge from working closely together.About the TeamYou may have already encountered our card readers while enjoying a cappuccino or settling a bill at your favorite salon. Our Hardware team is dedicated to crafting elegantly designed card payment devices and accessories that empower our merchants to launch, manage, and expand their businesses. We tackle a variety of engineering challenges spanning industrial and electronic design, embedded systems, mobile applications, and backend services.We foster an environment of open communication and continuous learning rather than strict regulations. If you are eager to innovate and support millions of independent merchants in achieving success, we encourage you to apply!Your ResponsibilitiesLead the system bring-up for the Android Embedded platform, focusing on bootloader, kernel, and driver integration.Create and integrate custom modules for SumUp, including kernel drivers, power management, and connectivity components.Enhance the build system to ensure stability and scalability across the platform.Debug hardware and software issues at the protocol level (I2C, SPI, UART, SDIO, etc.).Conduct testing and validation to ensure timely delivery of high-quality releases.Work closely with Hardware Engineers, QA, Product Managers, and Manufacturing/Supply Chain teams.Deliver Android OS features independently and contribute to a culture of engineering excellence within the Hardware Tribe.

About the Role As a Senior Embedded Quality Assurance Engineer within SumUp's Hardware Tribe, you will join a small, talented, and cross-functional team where collaboration thrives among Product Managers, Embedded Engineers, Mobile Engineers, and other professionals. Your primary responsibility will be to create sustainable testing solutions and take charge of developing essential mobile testing tools for our QA team. Additionally, you will play a pivotal role in designing hardware test infrastructures for Hardware-in-the-Loop (HIL) testing, providing critical support for software release processes. The ideal candidate will possess an engineering mindset with a focus on product ownership, demonstrating flexibility while adapting to changing priorities. Location Requirement This position requires on-site work at our Berlin office, as we value the natural conversations that arise from working closely together. About the Team You likely have encountered our card readers during your daily transactions, whether it be for your morning coffee or your hairstyling needs. Our Hardware team is dedicated to designing aesthetically pleasing card payment devices and accessories that empower merchants to launch, manage, and grow their businesses. We engage with a wide array of engineering disciplines, including industrial and electronic design, embedded systems, mobile applications, and backend services. We champion open communication and continuous learning over rigid structures. If you are eager to innovate and aid millions of small independent merchants in achieving success, we invite you to join us! What You’ll Do Guarantee that all new code developed by engineers meets quality standards and adheres to best practices in collaboration with the Code Lead. Build and maintain robust test infrastructure for HIL testing, with a strong focus on Embedded QA. Ensure comprehensive testing coverage for major features, particularly UI, Mobile Applications, and end-to-end tests. Facilitate timely delivery of new releases while maintaining high quality. Promote a culture of quality within the Hardware Tribe. You’ll Be Great for This Position If: You have expertise in Embedded QA within a Linux environment. You possess experience in Object-Oriented Programming, particularly in Python. You are knowledgeable about REST APIs. You have experience in building test libraries. You demonstrate a strong commitment to quality assurance and testing processes.

Lead the complete development lifecycle of high-performance Android applications utilizing Kotlin, Coroutines/Flow, Jetpack Compose, Dagger/Hilt, Retrofit, and Espresso, along with other cutting-edge technologies.Design and enhance a modular architecture that ensures long-term maintainability and reliable performance even under peak traffic conditions.Drive automation initiatives by establishing robust build, test, release, and deployment pipelines as integral aspects of the product (CI/CD).Function as a technical multiplier by elevating quality standards through code reviews, mentoring colleagues, and disseminating knowledge across Android teams.Collaborate with product, design, and editorial teams to shape features from concept to launch, ensuring optimal user value, reliability, and speed.Investigate and implement AI-driven development tools to enhance developer productivity and software quality, grounded in sound engineering principles.

FlixMobility GmbH is looking for a Senior Software Engineer - Mobile/Android (m/f/d) to join the Berlin office. This position centers on building and enhancing mobile apps that serve millions of travelers around the globe. Team and Collaboration The role is part of the Android Team within the Customer Experience Stream's Demand Division. The group includes a product owner, UX specialist, Agile tester, and several engineers. Together, they focus on the travel onboarding journey and post-booking features to make the Flix app a reliable companion for passengers. Close collaboration with iOS colleagues and other feature teams ensures a unified mobile experience. Delivering well-integrated, thoroughly tested features is a key part of the work. What You Will Do Develop and maintain scalable Android applications with a strong focus on user experience Refine onboarding and post-booking flows to improve the passenger journey Work alongside cross-functional teams to deliver cohesive mobile features Maintain code quality and reliability through comprehensive testing Tech Stack Languages & Architecture: Kotlin, Jetpack Compose, MVVM, Clean Architecture Networking & Data: GraphQL, Firebase Remote Config, Crashlytics Dependency Injection: Dagger/Hilt Testing: Espresso, Robolectric, JUnit CI/CD & Automation: GitLab CI/CD, Fastlane, Docker Collaboration Tools: Figma, Microsoft Teams, Atlassian Jira, Confluence, Atlas Benefits Competitive salaries Growth and development opportunities Collaborative culture with personal ownership Work on products used by millions of travelers

Role Overview JetBrains s.r.o. creates tools that help developers work smarter. The team is looking for a Software Engineer with experience in CLion, embedded debugging, and tool integrations. This position is open in several locations: Belgrade, Berlin, Limassol, Madrid, Munich, Paphos, and Warsaw. What You Will Do Design and enhance features in CLion focused on embedded systems. Debug and optimize embedded applications for reliability and performance. Integrate different development tools to improve workflow efficiency. Work with teams across disciplines to define needs and deliver solutions. Who We’re Looking For This role suits engineers who enjoy solving complex problems and improving developer tools. Curiosity, creativity, and a strong interest in technology are valued here.

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).

scalablegmbh is seeking a Senior Android Engineer to join the team in Berlin. This position centers on designing and building Android applications that improve user experience and offer advanced functionality. What you will do Design and develop Android applications with a focus on usability and performance Work closely with colleagues from different disciplines to deliver cohesive mobile solutions Contribute to architectural choices and help shape the direction of mobile development Support the creation of scalable products that can grow with user needs Who we are looking for Experience building Android apps and a strong interest in mobile technology Comfort working on complex technical challenges Enjoys collaborating in a team setting and sharing ideas Motivated to have a meaningful impact on product quality and user satisfaction This role is based in Berlin and offers the chance to help shape the future of mobile solutions at scalablegmbh.

Superhuman offers a full-time dynamic hybrid working model for this role. This flexible framework allows team members to enjoy both focused work time and in-person collaboration, fostering trust, innovation, and a robust team culture.About SuperhumanSuperhuman, now a part of Grammarly, is revolutionizing productivity through AI, dedicated to unlocking the superhuman potential within everyone. Our suite of applications seamlessly integrates with over 1 million platforms and websites, providing tools such as Grammarly's writing assistance and Go, our proactive AI assistant. Founded in 2009, we empower over 40 million users and thousands of organizations and educational institutions globally to eliminate busywork and prioritize what truly matters. Discover more at superhuman.com and explore our core values here.The OpportunityTo reach our ambitious targets, we are seeking a talented Android Engineer to join our Mobile Team. This role presents a unique opportunity to develop new features and capabilities that will enhance the Superhuman Android experience to world-class standards.Our engineers and researchers enjoy the freedom to innovate and drive breakthroughs that directly influence our product roadmap. As we scale our interfaces, algorithms, and infrastructure, the complexity of our technical challenges is rapidly increasing. For insights from our team, check out our technical blog.Writing effectively on mobile devices poses significant challenges, particularly in professional environments. Our Superhuman AI Writing Assistant, launched in 2023, aims to make effective and error-free writing easily accessible on mobile. Since its introduction, it has gained substantial traction, with users engaging with it over seventy times daily.Creating a seamless writing assistant experience brings unique challenges, as there is no tolerance for delays or glitches in a product that users rely on for immediate responses. As an Android Engineer, you will:Work closely with the Product, Design, and Machine Learning teams to translate new ideas from concept to production.Contribute to the ongoing architecture of our mobile products, ensuring outstanding responsiveness and performance, even in resource-constrained environments.

Join Our TeamBecome an integral member of SumUp's Mobile Platform Squad as a Senior Android Engineer and play a pivotal role in our growing Android ecosystem. With substantial investments directed towards flagship products, we empower our feature teams to create world-class user experiences. Your contributions will be key in establishing a solid foundation that enables over 40 Android engineers to work at peak productivity and efficiency, directly influencing the future of mobile payments for millions of merchants.Our engineering culture emphasizes autonomy, collaboration, and innovative thinking. Your initiatives will resonate throughout the organization, connecting you with mobile engineers across various teams. This role is vital for:Removing Bottlenecks: Proactively identifying and resolving critical bottlenecks in CI/CD pipelines and app infrastructure that could hinder the rollout of new features and enhancements.Enhancing Developer Experience: Designing and implementing state-of-the-art tools and infrastructure that significantly improve developer experience, decrease build times, and streamline workflows for our extensive Android engineering team.Modernizing a Mature Codebase: Leading the evolution and refinement of our Android codebase, with an emphasis on code simplicity, maintainability, and overall health across all SumUp Android products.Ensuring Product Stability & Scalability: Providing essential support and guidance across our diverse Android product suite, assuring consistency, reliability, and seamless functionality for the Register, Android Terminal, SumUp Go, and Merchant app.Your Responsibilities:Strategic Impact: Spearhead the development of core experiences for both merchants and our internal Android developers, directly contributing to SumUp's ambitious Android product roadmap.Technical Leadership: Architect, develop, and maintain essential tools, frameworks, and infrastructure that significantly enhance the consistency, scalability, and reliability of our mobile applications, ensuring no adverse effects across our varied Android products.Performance & Efficiency: Drive initiatives in CI/CD systems, advanced developer tooling, and performance enhancements to dramatically optimize mobile development processes and reduce build times for our expanding team.Codebase Evolution: Actively manage technical debt, enhance code health, and introduce best practices to a complex, mature codebase, ensuring its longevity and adaptability.

moia seeks a Senior Embedded Engineer to join the Vehicle Foundation Domain. This role centers on developing embedded systems that support advanced vehicle technologies. The position involves designing, building, and testing software components that directly influence vehicle performance and safety. Key responsibilities Collaborate with multidisciplinary teams to deliver embedded solutions for vehicles Design, implement, and test software components for essential vehicle systems Apply embedded engineering expertise to enhance safety and performance in vehicle platforms Work locations Berlin, Germany Hamburg, Germany Hannover, Germany Munich, Germany Wolfsburg, Germany

Your Next Career Move Awaits!Trade Republic is Europe's leading savings platform, operating across 18 countries and serving over 10 million customers who have entrusted us with more than €150 billion in assets. Our ambition is to empower everyone to build wealth through accessible, secure, and cost-free financial services.Join us to enhance your career alongside a team of talented professionals and cutting-edge technology, as we strive to create a sustainable and positive future for millions.Your RoleLead the development of Android platform components, including modular architecture, core libraries (networking, analytics, storage, feature flags), and shared UI elements.Enhance application performance and reliability focusing on startup times, rendering efficiency, memory usage, and battery optimization; set performance budgets and standards.Advance our CI/CD processes by optimizing Gradle build times, managing dependencies, and improving test infrastructure (unit/instrumentation) and release automation.Enhance system observability through improved logging, metrics, tracing, crash reporting, ANR detection, and real-user monitoring.Champion coding excellence by enforcing static analysis, lint rules, coding standards, API guidelines, and maintaining thorough documentation.Collaborate with security and privacy teams to ensure robust data handling, permissions management, SAFE storage, Play integrity, and supply-chain hardening.Mentor and support feature teams, conducting discovery reviews, and leading migration and platform rollouts.

Join Avaloq, a leading provider of banking software solutions, as a Software Engineer specializing in Android Mobile Banking. You will be at the forefront of developing innovative mobile banking applications that enhance user experiences across the European market. Collaborate with a dynamic team of professionals to deliver high-quality software solutions that meet the evolving needs of our clients.

Join Our Innovative Team as an Embedded Software Engineer (m/f/d) at ADAM Audio GmbH!Location: Berlin offices / hybridEmployment Type: Full-time, permanentSalary: Competitive and based on experienceStart Date: As soon as possibleAre you enthusiastic about engineering with a focus on acoustics and audio reproduction? Are you an Embedded Software Engineer eager to contribute to groundbreaking audio products? If so, we want to hear from you!At ADAM Audio, we are fueled by our passion for audio excellence. We are dedicated to pushing the limits of innovation in audio and acoustics, striving for perfection in our engineering solutions to deliver exceptional products to our customers.Your Role and Responsibilities:Work collaboratively with cross-functional and diverse teams to define, prototype, and develop products from concept to market launch and ongoing maintenance.Provide firmware code for hardware products, evaluate new technologies, debug prototypes, and ensure compliance with market regulations (CE, FCC, CRA, etc.). Shape the direction of embedded projects and participate in all phases of project lifecycles.Refine product specifications, create innovative designs, and engage with a multidisciplinary team. Plan activities, estimate work, and collaborate to meet deadlines while testing and debugging electronic hardware designs.Engage in personal and team development, with opportunities to enhance your expertise in embedded software engineering, including best practices, processes, and tools. Share your knowledge across the Focusrite group.

Join SumUp as a Senior Android Engineer in our dynamic Design System team. You will play a pivotal role in transforming SumUp’s design language into a versatile library of user interface components and experience patterns. This initiative empowers product teams to create cohesive and accessible user experiences that resonate globally.The Design System team is poised for growth, reflecting SumUp’s expanding suite of merchant and consumer-facing products. This position presents a remarkable opportunity to enhance and innovate a system that accelerates feature development, ultimately delivering high-quality experiences to millions of users worldwide.Key ResponsibilitiesShape the core experience for users and developers within SumUp’s Android ecosystem.Collaborate closely with product and design teams to develop components that prioritize maintainability, usability, aesthetic appeal, and consistency.Integrate accessibility best practices into every component, ensuring compliance with content descriptions, touch target size, color contrast, and font scaling.Implement dynamic theming support, allowing for light/dark mode and brand variations that can be adjusted in real time or through configuration.Provide hands-on technical support to product teams to align with company objectives, including the upcoming brand refresh.Review code contributions, enforce design-system conventions, and mentor engineers on best practices for reusable UI development.Proactively identify and mitigate technical debt to uphold high standards of engineering excellence and codebase health.Qualifications3+ years of professional Android development experience, with a strong command of Kotlin and modern Android frameworks.At least 2 years of experience with Jetpack Compose.A passion for writing clean code, demonstrating a balance between pragmatism and perfection.A solid understanding of testing best practices: what to test, why, and how to create resilient tests.A keen eye for detail and a commitment to accessibility.Self-motivated with a structured working style, complemented by strong verbal and written communication skills in English.An enthusiasm for staying updated with advancements in the Android ecosystem and a desire to share knowledge with the Android community.Bonus QualificationsExperience in building and maintaining design systems or component libraries for Android, including theming, style guides, and reusable UI components.

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 Tonsser, a company dedicated to empowering young football players for over a decade, as we embark on an exciting phase of growth. We are currently seeking a skilled Senior Android Developer to play a pivotal role in shaping our future innovations. If you have a passion for your craft, thrive in a fast-paced environment, and desire to make a significant impact on the lives of millions of athletes, we encourage you to apply.

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.

At Enpal, we are more than just a company; we are part of a transformative movement. As a celebrated greentech unicorn and one of Europe's fastest-growing energy enterprises, we are committed to making solar energy accessible and effortless for homeowners across the continent. Our groundbreaking business model encompasses solar panels, heat pumps, home energy storage systems, and EV charging stations, redefining the residential energy landscape. With a mission to empower homeowners to adopt clean energy, we are laying the foundation for a sustainable and decentralized energy future.As a leader in the residential solar energy sector, Enpal is on a growth trajectory with a clear vision: to become the driving force in Europe's transition to sustainable and decentralized energy generation.Job OverviewBased in either Berlin or Stuttgart, we are expanding our tech team to further develop the core of the Enpal system - our IoT division. Collaborating closely with partner companies, we aim to craft seamless and innovative energy solutions for the future.In the role of Senior Embedded Software Engineer (f/m/x), you will engage directly with hardware, production systems, and real-world operational challenges. This position is pivotal in designing, validating, and operating systems that must perform reliably in the field, combining substantial technical expertise with hands-on leadership in production-grade IoT environments. If you value ownership, technical depth, and transparent collaboration, this role offers the opportunity to significantly influence both systems and processes.Design, validate, and optimize firmware for Linux-based IoT devices.Assist colleagues in building and maintaining essential software services for IoT device configuration and activation in production environments.Collaborate with partner companies to validate externally delivered software.Establish and maintain automated validation pipelines (HIL/SIL testing).Enhance and maintain Linux systems built with the Yocto build chain.Contribute to CI/CD pipelines and release processes using Git-based workflows.Enhance system-level reliability (network interfaces, systemd, boot flows, toolchains).

Join Our Team at GetYourGuide At GetYourGuide, we are the world’s leading platform for unforgettable travel experiences. Since our inception in 2009, we have empowered travelers across the globe to discover and book over 150 million tours, activities, and attraction tickets. Our headquarters in Berlin is home to a dynamic team of over 800 travel experts and technologists, united by a passion for making travel magical. Explore our careers page to learn more about our culture and values. Our Mission: Technology is the driving force behind our growth at GetYourGuide. We continue to innovate in Design, Engineering, and Product to redefine the travel experience. You will play a crucial role in developing solutions that simplify customer interactions and enable our partners to thrive. From creating fintech infrastructure to enhance payment processes to contributing to our strategic growth, the impact of your work will resonate globally. As part of our Engineering team, you will collaborate with diverse, cross-functional teams to enhance the magic of travel for our users. Your Role: As a Senior Software Engineer with a focus on Frontend, you’ll be an integral part of a product team. Collaboration and a customer-centric approach are key as you tackle real-world user challenges and shape the product experience. This is primarily an 80/20 full-stack role, utilizing TypeScript and Node.js for backend development. A robust knowledge of both frontend and backend technologies is necessary, particularly in managing our Server-Driven UI backend-for-frontend (BFF) layer, which involves creating backend components that adapt to frontend requirements to elevate the user experience. Your role will require close cooperation with product managers, designers, and stakeholders, so strong collaboration and communication skills are essential. We seek engineers who not only excel technically but also effectively advocate for customer needs and align with business objectives. You’ll support the team in building and scaling our platform, ensuring a seamless and engaging user experience.