Senior Android Software Engineer - Kotlin Multiplatform

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 s…

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!

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.

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.

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!

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.

Join our dynamic team at evooq as a Senior Software Engineer! In this role, you will leverage your extensive experience in software development to design, implement, and maintain high-quality software solutions that meet our client’s needs. You will collaborate closely with cross-functional teams, contributing to all stages of the development lifecycle. If you are passionate about technology and eager to make a significant impact, we want to hear from you!

Role overview SmartRecruiters is seeking a Senior Software Engineer with strong Python skills to join the team in Poland. This role focuses on building and enhancing scalable software that supports the company’s product suite. Senior engineers at SmartRecruiters play a key part in shaping technical decisions and work closely with colleagues from various teams. What you will do Design and implement software solutions using Python Work with product managers, designers, and engineers to deliver new features Promote development best practices and contribute to architectural choices Mentor junior engineers and help them grow technically Requirements Experience building scalable applications with Python Comfort working in a collaborative setting that can move quickly Interest in solving practical problems with technology Ability to share knowledge and support less experienced team members

As a Senior Software Engineer focusing on AI Retrieval at Asana, you will play a pivotal role in designing and implementing cutting-edge solutions that enhance our AI capabilities. You will collaborate with cross-functional teams to build scalable systems that improve information retrieval and user experience. Your expertise in software engineering and artificial intelligence will help drive innovation and set new standards for efficiency and performance.

Join our dynamic team at Sigma Software Group as a Senior Software Engineer / Team Leader, where you'll play a pivotal role in leading innovative projects and guiding a skilled team of developers. You will be responsible for architecting robust software solutions, ensuring high-quality code, and mentoring junior developers.We are looking for a passionate leader who thrives in a collaborative environment and is eager to take on challenges. If you have a strong background in software engineering and a desire to lead a team towards success, 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 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.

Are you passionate about leading a team while writing high-quality code? Join Sigma Software as a Senior Software Engineer / Team Leader! In this pivotal role, you will guide a talented team of engineers, overseeing code reviews, design critiques, and career development while collaborating with our integration teams.Design and develop scalable solutions, ensuring a balance between production-ready code and rapid proof-of-concept development.Take ownership of sprint planning and execute the quarterly roadmap effectively.Serve as the final escalation point for complex technical challenges.Quickly learn and adopt new technologies while strategically managing technical debt.

Senior Software Engineer, Data Foundations ABOUT THE ROLE At Peloton, we view Data as a Product—a vital asset that drives every member interaction and influences business decisions. Our Datastores team is committed to offering a dependable, secure, and high-performing data persistence layer for application services throughout the organization. Our core principles include: 1. Safeguard the data, 2. Optimize for scalability, speed, and reliability, and 3. Minimize manual effort. We are seeking a Senior Software Engineer with extensive experience in constructing and managing data-intensive systems to join our Datastores team. This position is perfect for a backend engineer who has developed and maintained production systems heavily reliant on databases, caching layers, and data pipelines, and who is eager to advance their knowledge in scalable, cloud-native data infrastructures. You will collaborate at the intersection of application engineering and data platform reliability, working alongside service teams to enhance the storage, access, scalability, and observability of data across Peloton’s ecosystem. YOUR DAILY IMPACT AT PELOTON Your responsibilities will include: Designing, building, and maintaining backend systems that depend on scalable and highly available data persistence layers. Collaborating with service teams to refine database design, enhance query performance, and optimize data modeling. Contributing to automation efforts surrounding infrastructure provisioning using tools like Terraform and Backstage, while improving developer experience by creating self-service tools for databases and caching systems. Focusing on observability, performance insights, and autoscaling strategies for production datastores. Participating in architectural discussions regarding multi-regional data persistence and global scalability. This role merges hands-on backend engineering with significant exposure to cloud data systems and platform reliability challenges. WHAT YOU BRING We are looking for proficient backend engineers who are data-centric—those who have built systems where data performance, reliability, and modeling are crucial. 5+ years of software engineering experience in developing production backend systems. Strong familiarity with relational databases such as PostgreSQL or MySQL, including schema design, indexing, and query optimization. Experience with NoSQL datastores like DynamoDB, Redis, Elasticsearch, or Memcache. Exposure to data pipelines, event-driven architectures, and cloud technologies.

Join Nearmap as a Lead Senior Software Engineer on our dynamic API team, where you will spearhead the design, implementation, and delivery of innovative software solutions that align with our business goals. Your expertise will empower our developers to tackle real-world challenges faced by our users.In this pivotal role, you will collaborate closely with the Product team to analyze requirements, design robust software solutions, and elevate the capabilities of the development team through best practices and mentorship. You will have the unique opportunity to contribute to a powerful platform that manages petabytes of aerial imagery, fuels sophisticated AI models, and provides real-time geospatial insights to clients worldwide. Our systems are designed for high performance, scalability, and cutting-edge innovation, managing everything from data ingestion to API delivery and customer applications.This is a rare chance to influence quality practices across an extensive platform integrating high-resolution imagery, AI-driven insights, and scalable data delivery systems while establishing API initiatives in our new Warsaw engineering hub. Your contributions will be instrumental in ensuring the reliability of systems that are transforming decision-making processes across various industries.At Nearmap, we value versatile engineers who possess leadership skills and enthusiasm for overcoming new challenges across the full technology stack as we continue to advance our capabilities.

Join our innovative team at Aurora Solar as a Senior Software Engineer. In this role, you will help drive our mission to revolutionize solar energy solutions on a global scale. Your expertise will contribute to developing cutting-edge software that empowers solar professionals and enhances efficiency in solar project management.As a key player in our engineering team, you will work collaboratively with cross-functional teams to design, implement, and optimize software solutions that meet the needs of our international clientele. Your contributions will directly impact the future of renewable energy technology.

Join our dynamic team at Inetum2 as a Senior Fullstack Software Engineer, where you'll be at the forefront of developing innovative software solutions. In this role, you will leverage your expertise in both frontend and backend technologies to build scalable applications that enhance user experience. Collaborate with cross-functional teams to design, develop, and maintain high-quality software products.