Kotlin Multiplatform Android Engineer

Join Our Innovative TeamAt SumUp, we empower businesses—from cafes and shops to bars and salons—with our cutting-edge Point-of-Sale (POS) solution. This innovative platform offers a comprehensive array of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools, designed to enhance operational efficiency and foster growth.Our POS solution seamlessly integrates into the SumUp SuperApp, supporting both our proprietary register hardware and mobile devices such as tablets and smartphones.Your Role as an Android EngineerAs a key member of our dynamic team, you will collaborate with Product Managers, Designers, Engineering Managers, and fellow engineers to drive the development of our mobile applications. We are transitioning towards a Kotlin Multiplatform (KMP) strategy, allowing for shared development across Android and iOS platforms. In this role, you will have the opportunity to learn, refine, and implement KMP technologies, significantly shaping the future of our mobile applications.We value user-centric design and seamless collaboration. If you thrive in a cross-functional environment and bring structure to communication, we want you on our team!

Join Our Innovative TeamAt SumUp, we are dedicated to transforming the way businesses operate through our cutting-edge Point-of-Sale (POS) solutions. Our platform empowers a diverse range of businesses, from cafes and bars to retail shops and salons, providing them with essential tools to enhance their operational efficiency and drive growth.Our POS system seamlessly integrates into the SumUp SuperApp, compatible with both our proprietary hardware and mobile devices, making it versatile and user-friendly.As a Senior Android Developer, you will work alongside a dynamic, multidisciplinary team, including Product Managers, Designers, Engineering Managers, and other talented engineers, to deliver exceptional mobile applications.Your RoleWe are transitioning to a Kotlin Multiplatform (KMP) strategy to facilitate shared development across Android and iOS platforms. In this position, you will not only enhance your skills but also play a pivotal role in implementing this innovative technology, influencing the future of our mobile applications.We are looking for a developer who prioritizes user-centric design, values precision, and excels in collaborative environments. You will bring clarity to communication and thrive within a cross-functional team.This is a B2B role based in Warsaw.Key ResponsibilitiesDevelop and implement new features for the item catalog within the SumUp SuperApp.Contribute to the architecture of the application and support our Kotlin Multiplatform strategy.Maintain and enhance our unified Android application, ensuring high-quality and scalable solutions across 60+ countries.Drive the evolution of our product by identifying opportunities for improvement and participating in daily decision-making.Create comprehensive documentation and execute robust testing for features prior to release.Collaborate closely with Designers, Product Managers, and Android engineers to ensure a cohesive user experience across platforms.Ideal Candidate ProfileOver 8 years of experience in mobile engineering, specifically with Android and Kotlin.At least 2 years of experience working with Jetpack Compose.A strong understanding of software design patterns (e.g., MVVM, MVI) and expertise in creating modular, scalable app architectures.Proficient in reactive programming concepts (Flow, Coroutines, and Concurrency).A solid grasp of testing best practices, ensuring high-quality deliverables.

Join our dynamic team at Saily as a Senior Android Engineer, where you will lead the development of innovative mobile applications using Kotlin. Collaborate with a talented group of engineers and designers to create seamless user experiences, ensuring high performance and responsiveness of our applications.

Saily, part of nordsec, helps travelers connect worldwide without roaming fees or plastic SIM cards. The service delivers fast, secure mobile data in more than 200 locations and supports millions of paying users, including hundreds of thousands of travelers at any given time. The team values an AI-native product engineering approach. Engineers at Saily take responsibility for the full product lifecycle, from early ideas through deployment. AI agents handle repetitive work, freeing engineers to focus on solving customer problems and building new features. How the team works Engineers design and deliver solutions to real customer challenges, owning projects from start to finish. AI tools automate routine tasks, letting the team work more effectively. Everyone can suggest and implement improvements to the platform. Continuous learning, curiosity, and sharing knowledge are core values. The main goal is to provide travelers with a smooth, reliable connection wherever they go. Culture and values Growth is valued over comfort. Contribution matters more than hierarchy. Impact takes priority over rigid processes. Team members receive the context, autonomy, and AI tools needed to excel.

Are you an experienced Android Engineer with a passion for Kotlin? Join the innovative team at Saily, where we are dedicated to creating cutting-edge applications that enhance user experiences. As a Senior Android Engineer, you will play a crucial role in designing, developing, and maintaining high-quality mobile applications. Collaborate with cross-functional teams, contribute to architectural decisions, and mentor junior developers in a dynamic and supportive environment.

Saily, part of Nord Security, is looking for a Senior Android Engineer with strong Kotlin skills to help shape and improve our mobile applications. This role centers on building new features and refining app performance for a better user experience. What you will do Design and implement features for Android applications using Kotlin Work closely with cross-functional teams to deliver high-quality solutions Troubleshoot and resolve technical issues as they arise Maintain high coding standards throughout the development process Requirements Extensive experience in Android development Proficiency with Kotlin Strong problem-solving skills and attention to detail Comfort working collaboratively with diverse teams This position is based in Warsaw and offers the chance to work on challenging projects in a collaborative setting.

Join our dynamic team as an Android Developer specializing in Kotlin. We are in the process of developing an innovative mobile application designed to facilitate scheduling and conducting inspections for field teams. This application will feature a Bluetooth module that enables seamless connectivity and configuration of inspection robots, enhancing the interaction between human operators and robotic systems.Key ResponsibilitiesArchitect and develop Android applications leveraging Kotlin.Implement Bluetooth Low Energy (BLE) modules for connecting, configuring, and managing inspection robots.Create robust scheduling and task management functionalities tailored for field inspection teams.Work closely with designers to ensure an optimized UI/UX experience for mobile applications used in challenging environments.Maintain application observability through effective logging, monitoring, and error reporting.Enhance quality assurance processes through unit testing, automated UI tests, and CI/CD pipeline management.

Join moss as a Senior Mobile Engineer specializing in Android development. We are seeking a passionate and innovative engineer to lead our mobile projects, enhance user experience, and contribute to a dynamic team. Your expertise will help shape the future of our mobile applications, ensuring they are robust, user-friendly, and scalable.

QED AI is an innovative technology firm committed to enhancing public health and food security across Sub-Saharan Africa. We specialize in developing digital infrastructure and AI solutions that bridge the gap between humanitarian aid and scientific research. Our initiatives include monitoring HIV and malaria, as well as analyzing crop and soil nutrients, with operations spanning several countries in Africa. Our funding is supported by notable philanthropic and governmental organizations, such as the Global Fund, Gates Foundation, CDC, and USAID.We are eager to welcome an Android Developer to our Warsaw team. Ideal candidates will possess the following skills:A minimum of 4 years of experience in developing Android applications with successful deployment on the Play Store.Proficiency in Kotlin for Android development, along with a foundational understanding of Kotlin coroutines.Experience with Android Jetpack components.Solid knowledge in software engineering principles, version control, writing clean and maintainable code, and understanding of data structures and algorithms.Fluent in English (C1 level) with strong verbal and written communication skills (minimum typing speed of 45 words per minute).Strong logical reasoning and the ability to articulate ideas effectively.An open-minded attitude towards collaborating with diverse cultures.Demonstrated emotional intelligence and resilience.A genuine passion for your work and a positive outlook, even amidst challenges.Additionally, the following skills will be considered a plus, though not mandatory:Experience leading a software engineering team.Interest or background in sustainable development goals related to public health and agriculture in developing nations.Experience in computer vision technologies.Familiarity with gRPC.What to expect from us:Unique and socially impactful projects.Minimal bureaucracy.Significant autonomy and ownership over your work.

Role Overview Sigma Software Group is looking for a Junior Mobile Test Engineer to help ensure the quality of mobile apps on both iOS and Android. This role is based in Warsaw and offers the chance to work directly with experienced developers while building practical skills in mobile testing. What You Will Do Design test cases for mobile applications Execute manual tests on iOS and Android platforms Identify and document defects Collaborate with the development team to resolve issues What You Bring Attention to detail and a willingness to learn Interest in mobile technology and software quality Ability to work well with others in a team setting This position offers hands-on experience and a chance to grow technical skills in a supportive environment.

About Us:Planner 5D serves as a premier global platform for home design, connecting over 100 million users across 230 countries (yes, even two users from Antarctica each month!). Our innovative software streamlines the home renovation journey from initial concept to final execution, making it easier than ever for anyone—regardless of design expertise—to transform their living or workspaces. We are committed to enhancing the design experience, ensuring that customizing your dream home is accessible to all.With a robust cross-platform presence, including Web, iOS, Android, Windows, and MacOS, we ensure seamless synchronization for our users. Planner 5D is not just software; it is a vibrant community of passionate professionals from diverse backgrounds collaborating across time zones, all driven by a common goal to revolutionize the home design industry.We are continually seeking talented individuals who are eager to take initiative and foster innovation within our growing suite of tools. Join us in shaping the future of home design.We are on the lookout for a Java Engineer who will be responsible for developing tools and pipelines related to AI, rendering, data conversion, and other relevant areas.

Are you a talented Mobile Engineer skilled in iOS and Android development? Join our dynamic team at Saily, a leading tech company, where you will play a key role in shaping our mobile applications. We are looking for a passionate and innovative Senior Mobile Engineer to contribute to our exciting projects and help us deliver top-notch mobile solutions.Your expertise in mobile technologies will be crucial as you collaborate with cross-functional teams to design, develop, and maintain high-quality mobile applications. If you are eager to make a significant impact and thrive in a fast-paced environment, we want to hear from you!

About Us:Planner 5D serves as a global nexus for home design, bringing together over 100 million users across 230 territories (including two users from Antarctica each month!). Our platform transforms the home renovation journey from concept to implementation, streamlining the process through our state-of-the-art software. You don't need to be a professional designer to enhance your living or workspace; we believe in making the customization of dream homes accessible to everyone.Our cross-platform services include Web, iOS, Android, Windows, and MacOS, ensuring seamless synchronization for our users. Planner 5D is not just software; it's a vibrant community of passionate professionals from diverse backgrounds, collaborating across time zones with a unified goal of revolutionizing the home design industry.We are continually seeking like-minded talent who are eager to take initiative and drive innovation within our expanding suite of tools. Join us in shaping the future of home design!We are on the lookout for a skilled Android Engineer to develop next-generation mobile experiences for millions of users. You will collaborate with AI-driven 3D design tools, enhance performance, and test new features to push the boundaries of possibility. If you appreciate clean and reliable code, thrive in a strong team environment, and are passionate about modern technologies, we invite you to join us in shaping the future of home design!

About the Role planner5d is looking for an Android Team Lead to guide the development of mobile applications that help users design and visualize spaces. This position is based in Warsaw. What You Will Do Lead a team of Android developers, encouraging collaboration and creative problem-solving Oversee projects from initial concept to final release Apply Android development expertise to deliver high-quality apps that reflect planner5d’s vision

Join SKELAR, a pioneering Ukrainian venture builder committed to crafting international tech businesses. Working alongside our co-founders, we assemble talented teams aimed at achieving victory in global markets.Currently, SKELAR boasts a diverse portfolio of businesses across various sectors such as EdTech and marketplaces. Our startups are consistently recognized among Ukraine's top startups and product companies, achieving high rankings in the PlayStore and developing platforms utilized by millions. Our businesses have been featured in renowned media outlets like TechCrunch and Wired.We take pride in a robust team of over 1,000 experts with exceptional expertise and ambitious goals. Our people are our most valuable asset, and we strive to build businesses with the finest talents available in the market.We are currently seeking a Strong Middle/Senior Android Developer.PawChamp is a mobile application and online platform designed for pet parents—dog owners—providing them with resources to train their pets and learn more about dog care through 24/7 expert chats, our AI companion Pawchie, and educational materials developed with canine professionals. We deliver personalized daily lessons covering all aspects of dog training from basic commands to behavioral problem-solving. Our strategic goal is to become a leader in the global online dog training market, catering to all needs of pet parents and their dogs beyond just training.Recognized as Product of the Day on Product Hunt in October 2025.PlayStore rating: 4.2Intro video about the product: Watch hereChallenges awaiting you:- Support and enhance existing functionality; - Implement new features while adhering to agreed architectural approaches; - Ensure product stability and high quality through Unit and Integration testing; - Collaborate closely with a cross-functional team: from discussing logic with the Product Owner to aligning contracts with Backend and refining UI/UX with designers; - Involve in task decomposition, estimation, and collaborative sprint planning; - Actively influence improvements in workflows, technology stack selection, and development approaches within the team;What we value:Must have:4+ years of experience in Android development...

Join Us in Revolutionizing Password Security!At NordPass, we are dedicated to making password security seamless and straightforward. Our mission is to ensure that managing logins is both safe and easy. Be a part of the innovative team that powers NordPass—a trusted password manager used by over 7 million individuals and more than 10,000 companies worldwide to protect their sensitive information, including credentials and payment details.Your Role: As an Android Developer, you will play a pivotal role in enhancing our applications, enabling millions to secure their digital identities. You will contribute to developing intelligent and secure login solutions that empower users globally.

About Our Team At SumUp, we provide a comprehensive Point-of-Sale (POS) solution designed to empower businesses such as cafes, shops, bars, and salons to streamline operations and foster growth. Our platform encompasses a variety of features including product catalogs, inventory management, business analytics, compliance assistance, and loyalty programs. The Fiscalization team is dedicated to ensuring compliance in countries like Italy, Sweden, Norway, Belgium, and Austria, among others. We are also pioneering the integration with third-party services for fiscalizing receipts. As a Senior Backend Engineer, you will work alongside a vibrant, cross-functional team comprising Product Managers, Designers, Engineering Managers, and fellow engineers. Your Role In this position, you will develop secure backend systems that ensure SumUp's POS products are compliant across various countries on our roadmap. You will collaborate with the Fiscalization squad to devise unique solutions tailored to the challenges in each market. We are looking for a developer who values user-centric design, precision, and seamless collaboration. You will excel in a structured communication environment and thrive in a cross-functional team. This is a B2B role based in Warsaw. Key Responsibilities Design and maintain fiscal compliance solutions to support SumUp's expansion across Italy, Sweden, Norway, Belgium, Austria, and other European markets. Develop integrations with third-party services for receipt fiscalization and regulatory reporting. Navigate SumUp's intricate POS ecosystem and familiarize yourself with fiscalization frameworks across multiple jurisdictions. Work collaboratively with team members and stakeholders distributed across 5+ cities in a hybrid working model. You Will Succeed in This Role If You Have: 5+ years of experience in backend engineering with expertise in Java and/or Kotlin. A solid understanding of system architecture, design principles, data modeling, and API development. Hands-on experience with distributed and fault-tolerant systems. Proficiency in AWS and Kubernetes. Strong knowledge of Kafka, PostgreSQL, and CQRS.

Tietoevry is hiring an Android Framework Architect in Warsaw to guide the design and implementation of Android frameworks. This position shapes the technical direction for mobile solutions, focusing on improving user experience and supporting business goals. Role overview The Android Framework Architect leads architectural decisions and oversees the development of frameworks for Android platforms. Collaboration with cross-functional teams is central to this role, ensuring that architecture aligns with project requirements and delivery standards. Key responsibilities Design and implement Android frameworks for new and existing mobile solutions Work closely with engineering, product, and design teams to define architecture Support the delivery of high-quality software that meets user and business needs Location This position is based in Warsaw.

We are seeking an experienced Hydraulic Engineer to join our dynamic team in Warsaw. In this role, you will be instrumental in designing and implementing hydraulic systems for various projects, ensuring compliance with industry standards and regulations.Your expertise will contribute to innovative solutions that address complex engineering challenges, enhancing infrastructure and environmental sustainability.

Join Altersolutions as a Senior Electrical Engineer and contribute your expertise to innovative projects that drive technological advancement. You will play a pivotal role in designing, developing, and optimizing electrical systems, ensuring compliance with industry standards, and collaborating with cross-functional teams to deliver top-notch solutions.