Senior Android Software Engineer (HeyPolo)

🏢 Summary: Senior Android Engineer role focused on owning complex features end-to-end in a large-scale Kotlin app, from ambiguous requirements through experimentation to production rollout. The position emphasizes architectural excellence, codebase health, testing quality, and mentoring while working with modern Android technologies. You will drive technical improvements, ensure high UX standards, and solve complex production and performance challenges. 🗂️ Requirements: Proven experience shipping production-scale Android apps, Deep knowledge of Android internals and lifecycle, Strong Kotlin expertise, Experience with Jetpack Compose in production, Experience with Coroutines and asynchronous programming, Experience with Hilt for dependency injection, Experience with Android Navigation component, Ability to design modular and scalable architectures, Strong focus on testing and testability, Experience diagnosing and resolving complex production issues, Ability to mentor engineers through code reviews, Understanding of CI pipelines and build systems, Security-focused engineering mindset 📃 Skills: Kotlin, Android, Compose, Coroutines, Hilt, Navigation, JNI, Python, Bash, CI, A/B, Testing, Architecture, Performance, Security 🏢 Description: Our Android team does all it can to make you fall in love with our product on Android marketplaces. They specialize in everything that goes into designing an application from A to Z and are eager to turn all the innovations into a bug-free reality. The Android Development team creates experiences that users enjoy while maintaining the highest quality of our app. They challenge themselves with new projects and learn along the way. So if you’re up for this challenge, read along! If you want to: Own complex features end-to-end - from ambiguous requirements through A/B experimentation to production rollout; Work on a large-scale Kotlin Android app with Compose, Coroutines, Hilt, and Navigation component; Raise the quality bar for the whole team - push for testability, contribute to test infrastructure, and make sure "it works on my machine" is never the standard; Mentor engineers through code reviews and pair programming, teaching the "why" behind architectural decisions; Hunt down technical debt, flaky builds, and legacy pain points, treating codebase health as seriously as new features; Champion UX quality and refuse to ship unstable or half-baked interfaces; Dive fearlessly into unfamiliar territory - JNI, Python, Bash, reverse engineering; Drive improvements in ways of working - from AI-assisted development to CI pipelines. And you can check off: A track record of architecting and shipping production Android apps at scale; Deep knowledge of Android internals - lifecycle, framework behavior, performance characteristics; Experience designing modular, scalable codebases with clear architectural patterns; A testing mindset that goes beyond your own code - you've reviewed for testability, improved automation, or redefined what "tested" means on your team; Proven ability to diagnose and resolve complex production issues - performance bottlenecks, root cause analysis, system-level troubleshooting; Experience mentoring engineers and raising quality standards through the review process; Experience managing stakeholder expectations - you scope work realistically, surface risks before they become surprises, and don't over-promise; A security-conscious engineering mindset. Here's the deal: Growth and learning opportunities: time dedicated to learning, conferences, online learning platforms, and books for your professional development; Health and wellness: we want you to feel and be your best. That's why we offer various benefits, from online workouts, a physical coach and a gym to regular mental health checks; Tools of your choice: choose technical equipment and the tools you need to do your best; Community and celebrations: get ready for long-lasting traditions such as yearly workation, Friday get-togethers, various team buildings and company celebrations; Convenient commuting: traveling from point A to point B can be a pain. That’s why, depending on your unique circumstances, we compensate part of your public transport costs; Work-life balance: We encourage working in the office, with the possibility of up to two remote days per week. Plus, with our WFA policy, you can work from almost anywhere in the world; Premium Surfshark accounts: for you, your family, and friends;

🏢 Summary: Android Developer role focused on designing, prototyping, and delivering new mobile features for a global fintech app used by millions. The position involves close collaboration with product, design, and business teams across the full feature lifecycle. Relocation support is provided with flexible remote or hybrid work options. 🗂️ Requirements: 5+ years of Android development experience, Strong knowledge of Android SDK, Strong proficiency in Kotlin, Experience building Android apps for multiple device types, Experience collaborating on cross-functional software projects, Fluency in English 📃 Skills: Android, Kotlin, AndroidSDK, GitHub, TDD 🏢 Description: About Revolut People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products — including spending, saving, investing, exchanging, travelling, and more — help our 70+ million customers get more from their money every day. As we continue our lightning-fast growth,‌ 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work™. So far, we have 13,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role This role offers the opportunity to relocate to Poland, Spain, or the UAE . You'll receive support from Revolut throughout the entire process. Once you move, you'll have the flexibility to work full remotely or in a hybrid model in our offices in Krakow, Barcelona, Madrid, or Dubai. Our Technology team builds the systems and experiences that keep Revolut moving. From the infrastructure behind our innovative app to the features used by millions of people around the world, they bring sharp thinking, speed, and a focus on meaningful impact to everything they do. We’re looking for an Android Developer interested in every step, stage, and release of a feature who can collaborate effectively with team members across the business. Up to shape what's next in finance? Let's get in touch. What you’ll be doing Collaborating closely with product designers, focusing on new feature design and prototyping Assisting in the user experience design process, from wireframes and mockups through implementation and release Working closely with design and business teams to define and implement elegant solutions to interesting problems Helping to define and maintain visual guidelines, ensuring consistency throughout the app Prototyping new user interactions and iterations based on feedback from peers What you'll need 5+ years of experience in Android development A deep understanding of the Android SDK and Kotlin A background in building Android apps for a wide range of devices A track record of collaborating on cross-functional software projects An eagerness to learn quickly and deliver results in a dynamic environment Excellent communication and organisational skills A collaborative mindset to thrive in fast-paced team environments Fluency in English Nice to have A degree in computer science A perspective on mobile development best practices A GitHub portfolio showcasing personal or open-source projects Experience in financial services Familiarity with test-driven development (TDD) Compensation range Krakow: PLN28,300 - PLN33,300 gross monthly* Poland: PLN28,300 - PLN33,300 gross monthly* Other locations: Compensation will be discussed during the interview process *Final compensation will be determined based on the candidate's qualifications, skills, and previous experience Building a global financial super app isn’t enough. Our Revoluters are a priority, and that’s why in 2021 we launched our inaugural D&I Framework, designed to help us thrive and grow everyday. We're not just doing this because it's the right thing to do. We’re doing it because we know that seeking out diverse talent and creating an inclusive workplace is the way to create exceptional, innovative products and services for our customers. That’s why we encourage applications from people with diverse backgrounds and experiences to join this multicultural, hard-working team.

🏢 Summary: The offer is for an Android Developer responsible for building and testing native Android applications within an IoT ecosystem, focusing on BLE-based communication with home appliances. The role involves full lifecycle development in a Scrum team, ensuring high-quality architecture, testing, and hardware-software integration. It combines mobile development with low-level protocol work and real-device validation in a lab environment. 🗂️ Requirements: Minimum 3 years of experience in native Android development, Commercial experience with Kotlin, Experience with Bluetooth Low Energy (BLE), Understanding of mobile-to-hardware communication, Knowledge of HTTP, REST, JSON, XML, WebSockets, Familiarity with Clean Architecture and SOLID principles, Experience with Git, Experience with Jira, Experience with GitHub Actions, English level B2/C1, Residence in Poland or eligibility to work in Poland 📃 Skills: Android, Kotlin, BLE, HTTP, REST, JSON, XML, WebSockets, Git, Jira, GitHub, NDK, KMM, SSL, TLS, Coroutines, Flows, Jetpack, Compose 🏢 Description: We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we work with full autonomy. We independently choose our technologies, processes, and ways of working while maintaining the highest professional standards. We deliver a wide range of IT projects in Poland and internationally, across multiple domains and technologies. This allows our consultants to develop their competencies and gain experience aligned with their professional ambitions. Our collaboration is built around the CARE philosophy. For us, it means responsible project matching, transparent cooperation, and a long-term approach to professional growth. Join us as Android Developer. Grow in an environment that cares about your development as much as you do. Your responsibilities Native App Development: Design and develop high-quality native Android applications within the IoT ecosystem. IoT Integration & Testing: Actively test and implement seamless connectivity between mobile applications and home appliances, focusing on pairing and communication stability. Protocol Implementation: Work closely with low-level communication protocols, specifically Bluetooth Low Energy (BLE) , to ensure reliable hardware-software interaction. Quality Assurance: Conduct integration and end-to-end testing, utilizing tools for automated Unit and UI testing to maintain high performance in a complex, distributed system. Agile Collaboration: Participate in the full software development lifecycle within a cross-functional Scrum team, contributing to clean architecture and codebase modularization. Lab-Based Development: Utilize the onsite hardware laboratory to validate features on physical appliances that cannot be fully simulated. Requirements Professional Experience: At least 3 years of experience in native Android development. Technical Expertise: Experience with Kotlin. IoT Knowledge: Experience with Bluetooth Low Energy (BLE) and a solid understanding of how mobile devices interface with external hardware. Web Technologies: Proficiency in web-related standards including HTTP, REST, JSON, XML, and WebSockets. Architecture & Engineering: Familiarity with Clean Architecture, SOLID principles, and codebase modularization; experience with Git, Jira, and GitHub Actions. English: at least B2/C1 level Nice to have: Experience with Android NDK and Kotlin Multiplatform Mobile (KMM). Knowledge of cybersecurity practices (SSL/TLS, certificate pinning). Experience with Kotlin Coroutines and Flows for reactive programming. Familiarity with Android Jetpack Libraries and Jetpack Compose. You need to live in Poland and/or be eligible to work here. What we offer Work in a Scandinavian culture built on logic and dialogue. Health and sports benefits tailored to your needs. Speed Coaching – short sessions that provide new perspectives and solutions. Sports training, an internal team, and opportunities to take part in competitions. Team events and development-focused meetups.

🏢 Summary: Android Developer role focused on building a passwordless authentication platform used by millions worldwide. You will develop core mobile features end-to-end, ensuring secure data flows, high code quality, and robust architecture. The position emphasizes Kotlin expertise, security, and scalable solutions in a modern Android environment. 🗂️ Requirements: 6–8 years of commercial experience in Android development, Strong Kotlin knowledge, Experience with Coroutines and Flow for concurrency, Understanding of modern Android architecture and design patterns, Ability to write highly testable code, Knowledge of Android security concepts, Experience with secure data storage and cryptography basics, Experience using AI tools for coding, testing, or documentation 📃 Skills: Android, Kotlin, Coroutines, Flow, Architecture, DesignPatterns, Testing, Security, Keystore, Biometrics, Cryptography, DataStorage, AI 🏢 Description: About Us At Framna (formerly Bright Inventions), we partner with ambitious brands to create digital products that make a meaningful impact. We work across the full product journey, from strategy and UX to engineering and long-term growth, combining technical expertise with a strong product mindset. Together with our partners, we build solutions that users rely on every day. Our culture is built on trust, ownership, and fearless collaboration. We challenge ideas, support each other, and keep learning-openly sharing feedback, staying flexible in how we work, and approaching each other with empathy. Because the best products are created by teams that move forward together. About the Role We are building a passwordless authentication platform used by millions of users worldwide. The product focuses on secure digital identity, combining biometrics, document verification, and data processing to enable effective,  one-tap authentication. As an Android Developer, you will work on a core part of the mobile applications building features end-to-end, and handling secure data flows. There is a strong focus on code quality, architecture, and security. We are looking for someone with solid Kotlin fundamentals, who understands what is happening under the hood and takes ownership of their work. If you’re interested in security and enjoy solving real technical challenges at scale, this role should be a good fit. We work in a hybrid model, with occasional on-site meetings to stay aligned as a team. Preferred Skills & Qualifications at least 6-8 years of commercial programming experience in Android development very good working knowledge and deep understanding of Kotlin (including Coroutines/Flow for complex concurrency management) strong understanding of modern Android architecture, design patterns, and writing highly testable code familiarity with Android security concepts (e.g., Android Keystore, Biometric API, cryptography basics, or secure data storage) pragmatic approach to software design, with a focus on building scalable and maintainable foundations for greenfield projects experience with AI tools for coding, testing, and documentation strong collaborative mindset with a willingness to share knowledge and mentor other developers (e.g., through pair programming) ability to work independently and proactively within a distributed team very good level of English (both written and spoken) very good level of Polish (we work in an international environment, but within the company, we communicate in Polish) Nice to Have any practical experience with other mobile technologies, ex. Swift, Flutter, KMP or React Native What you will find at Framna Real ownership and influence on the products you build A focus on business value over technical perfection Continuous feedback and open, honest communication Regular 1:1s and a mentoring program to support your growth Internal workshops and knowledge sharing across teams Flexible working hours (you can start between 7:00–10:00) Hybrid model with regular in-studio collaboration (Gdańsk, Wrzeszcz) High-quality equipment, including MacBook and testing devices Individual training budget English classes in small groups Plus the essentials: Private medical care (Compensa) and MultiSport Team gatherings and shared moments beyond work If you are motivated by ownership, collaboration, and continuous improvement, and you enjoy solving real problems with a team you can rely on—you will feel at home at Framna. Let’s build impactful products together.

🏢 Summary: Senior Android Developer role focused on improving and refactoring the architecture of a complex appointment scheduling and virtual reception app. The position involves deep architectural work, modularization, dependency management, and close collaboration with a partner team through mentoring and pair programming. The role requires working in a hybrid model with occasional on-site collaboration. 🗂️ Requirements: 6-8+ years commercial Android development experience, Strong Kotlin expertise, Experience with modern Android architecture, Experience with Coroutines and Retrofit, Experience with large-scale refactoring, Experience managing complex dependencies, Experience modularizing applications, Experience with Room database, Experience writing unit tests, Experience with Mockk, Experience with CI/CD pipelines, Experience with GitHub Actions, Experience with Firebase App Distribution, Experience with AI coding tools, Ability to work in hybrid model with on-site presence, Very good English, Very good Polish 📃 Skills: Android, Kotlin, Coroutines, Retrofit, Room, Mockk, CI/CD, GitHub, Firebase, AI 🏢 Description: About Us At Framna, we partner with ambitious brands to create digital products that make a meaningful impact. We work across the full product journey, from strategy and UX to engineering and long-term growth, combining technical expertise with a strong product mindset. Together with our partners, we build solutions that users rely on every day. Our culture is built on trust, ownership, and fearless collaboration. We challenge ideas, support each other, and keep learning-openly sharing feedback, staying flexible in how we work, and approaching each other with empathy. Because the best products are created by teams that move forward together. About the Role You will join the Anywhere project - a complex ecosystem combining appointment scheduling and virtual reception services. Your role will go beyond just writing code. You will focus on the very foundations of the app: improving architecture, refactoring complex dependencies, and unifying modules. Working closely with the partner's team, you will provide hands-on mentoring (often through pair programming), setting best practices, and building a robust app together. This is a role for someone who finds satisfaction in deep architectural work and enjoys sharing knowledge to drive technical excellence. Please note that we follow a hybrid model with a requirement for occasional on-site syncs to foster team collaboration. Preferred Skills & Qualifications at least 6-8 years of commercial programming experience in Android development very good working knowledge and deep understanding of Kotlin practical experience with modern Android architecture and libraries (especially Coroutines and Retrofit) experience with large-scale refactoring, managing complex dependencies, and modularizing applications pragmatic approach to architecture with the ability to implement improvements step-by-step in an active codebase knowledge about global payment solutions experience with local mobile databases (specifically Room) and writing unit tests (e.g., using Mockk) familiarity with mobile CI/CD pipelines and distribution tools (Github Actions, Firebase App Distribution) experience with AI tools for coding, testing, and documentation strong collaborative mindset with a willingness to share knowledge and mentor other developers (e.g., through pair programming) ability to work independently and proactively within a distributed team very good level of English (both written and spoken) very good level of Polish (we work in an international environment, but within the company, we communicate in Polish) Nice to Have any practical experience with other mobile technologies, ex. Swift, Flutter, KMP or React Native What you will find at Framna Real ownership and influence on the products you build A focus on business value over technical perfection Continuous feedback and open, honest communication Regular 1:1s and a mentoring program to support your growth Internal workshops and knowledge sharing across teams Flexible working hours (you can start between 7:00–10:00) Hybrid model with regular in-studio collaboration (Gdańsk, Wrzeszcz) High-quality equipment, including MacBook and testing devices Individual training budget English classes in small groups Plus the essentials: Private medical care (Compensa) and MultiSport Team gatherings and shared moments beyond work If you are motivated by ownership, collaboration, and continuous improvement, and you enjoy solving real problems with a team you can rely on—you will feel at home at Framna. Let’s build impactful products together.

🏢 Summary: Senior Android Developer role focused on leading the modernization of a secure, high performance mobile SDK for digital fraud prevention and authentication in financial services. The position involves defining architecture, validating migration strategies, and establishing standards for SDK distribution, security, and testing. You will drive technical design, performance optimization, and cross functional collaboration in a distributed team. 🗂️ Requirements: 8+ years of Android development experience, Strong Kotlin proficiency, Java interoperability experience, Experience building and maintaining Android SDKs or libraries, AAR packaging and Maven publishing experience, Advanced Gradle configuration knowledge, ProGuard and R8 configuration experience, Dependency management and host app compatibility management, Android lifecycle and WorkManager expertise, Performance optimization and ANR prevention knowledge, Android security implementation using Keystore and encryption, Play Integrity API or SafetyNet experience, Experience with JUnit, Robolectric, and Espresso 📃 Skills: Kotlin, Java, Coroutines, Flow, Gradle, Maven, AAR, ProGuard, R8, WorkManager, AndroidX, Keystore, Encryption, SafetyNet, PlayIntegrity, JUnit, Robolectric, Espresso 🏢 Description: Project overview The project focuses on modernizing a mobile SDK used for digital fraud prevention and customer authentication within financial services. You will contribute to building a secure, scalable, and performance driven SDK designed for integration into a wide range of external Android applications. Team You will work in a distributed cross functional team including Android engineers, backend developers, and security specialists. The team collaborates across regions, following shared engineering practices and contributing to design decisions and system improvements. Position overview We are looking for a Senior Android Developer who will lead the technical design and implementation of an Android SDK modernization initiative. You will define architecture, validate migration strategies, develop proof of concept components, and establish engineering standards for distribution, testing, and security. Technology stack Kotlin, Java, Coroutines, Flow, Gradle, Maven, AAR, ProGuard, R8, WorkManager, Android Keystore, EncryptedSharedPreferences, Play Integrity API, SafetyNet, JUnit, Robolectric, Espresso, AndroidX Responsibilities Lead the design and development of Android SDK components Define and maintain scalable and maintainable SDK architecture Develop proof of concept solutions to validate architectural decisions Ensure SDK compatibility across different Android versions and device manufacturers Establish best practices for SDK distribution, integration, and versioning Collaborate with cross functional teams on security and compliance requirements Optimize performance including startup time, memory usage, and binary size Implement secure data storage and communication mechanisms Drive testing strategy including unit, integration, and instrumentation testing Participate in code reviews and contribute to engineering standards Requirements 8+ years of experience in Android development Strong proficiency in Kotlin and experience with Java interoperability Experience building, distributing, and maintaining reusable Android SDKs or libraries Experience with AAR packaging and artifact publishing using Maven repositories Strong knowledge of Gradle including build configuration and customization Understanding of ProGuard and R8 configuration and code optimization Experience managing dependencies and ensuring compatibility with host applications Knowledge of Android lifecycle management and background execution using WorkManager Understanding of performance optimization and avoiding ANR and UI performance issues Experience with Android security features including Android Keystore and encryption mechanisms Familiarity with Play Integrity API or SafetyNet and certificate pinning Experience with performance monitoring and profiling tools Experience with testing frameworks including JUnit, Robolectric, and Espresso Nice to have Experience working in financial services or regulated environments Exposure to sensor based data processing using Android SensorManager Knowledge of API desugaring and backward compatibility strategies Understanding of SDK footprint optimization techniques Experience contributing to architecture guidelines or internal engineering standards What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)

🏢 Summary: The offer is for an experienced Android Developer to build and enhance mobile applications within a Mobile Platform team, focusing on Kotlin and modern Android architecture. The role involves developing secure, scalable apps, integrating network services, and maintaining CI/CD pipelines in a cross-functional, innovation-driven environment. This hybrid position requires regular on-site presence in Kraków. 🗂️ Requirements: Minimum 3 years of Android development experience, Strong proficiency in Kotlin, Very good knowledge of Android framework, Experience with Retrofit, Coroutines, Room, Experience with MVP, MVVM, Clean Architecture, Ability to manage app state with ViewModel and LiveData, Knowledge of dependency injection and modularity, Experience with CI/CD pipelines, Knowledge of mobile application security practices, Experience with secure data storage and SSL Pinning, Advanced English (spoken and written) 📃 Skills: Kotlin, Android, Jetpack, Compose, Retrofit, Coroutines, Room, ViewModel, LiveData, MVP, MVVM, CleanArchitecture, Koin, Dagger, Hilt, CI/CD, SSL, HTTPS, Keystore, EncryptedSharedPreferences, Flow 🏢 Description: 🌍 Hello World! We are The Codest -  International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services. Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams. But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step. 💡 Project Description: We are looking for an experienced Android Developer who will be working in the Mobile Platform team including developing new mobile apps and online experiences, using digital messaging to enhance our customer relationships, building and improving the underlying technology and security platforms and innovating our propositions to compete effectively in a mobile, data-driven world. You will be part of a cross-functional team growing our digital capabilities, driving innovation, delivering products in ever-shortening cycles, and helping to drive the continuous improvement of our processes, tooling, and engineering practices. Please note: this is a hybrid position, you will be expected to come into the office 6 days per month overall (the office is located in Kraków). 📈 Your Responsibilities : Creating and developing mobile applications in Kotlin using Jetpack Compose. Designing and implementing solutions based on design patterns MVP, MVVM. Integrating applications with network services using Retrofit. Managing dependencies using tools like Koin, Dagger, Hilt. Creating and maintaining CI/CD pipelines. 🔑 Key Requirements: Advanced English in speaking and writing Minimum 3 years of experience in developing Android applications in Kotlin. Very good knowledge of the Android framework and libraries such as Retrofit, Coroutines, Room. Ability to work with Android Lifecycle and manage application state using ViewModel and LiveData. Knowledge of application modularity principles and dependency management. Practical experience in creating and maintaining CI/CD processes. Familiarity with design patterns MVP, MVVM, and Clean Architecture. Knowledge of mobile application security: Implementation of secure data storage (e.g., EncryptedSharedPreferences, Keystore). Secure network communication (SSL Pinning, HTTPS). Protection against reverse engineering and other threats. Implementation of user authorization and authentication. Ability to diagnose and solve problems, including production incidents. Willingness to work in distributed teams and participate in code reviews and retrospectives. Knowledge of best practices related to asynchronous programming (Coroutines, Flow). 6x a month working from the office in Krakow6x a month working from the office in Krakow 📜 Our Promise (what you can expect from us): 18-24k PLN on B2B Hybrid work (6x per month from the office in Kraków) 300 PLN to use on our benefits platform, Worksmile - gift cards, medical services, sports, etc. Our B2B contract contains provisions that allow you to obtain IP BOX support Integration events, education opportunities and much more… A unique opportunity to take your career to the next level - we’re looking for people who want to create an impact. You have ideas, we want to hear them! 📌 Recruitment process: 30 minute screening call online with our recruiter - Justyna 1 hour screening technical interview 1 hour call with the client Offer Questions, insights? Feel free to reach out to our recruiting team: justyna.pazdalska@thecodest.co In the meantime, feel free to visit our website where you can find key facts about us.

🏢 Summary: Mid-Level Kotlin Android Developer role focused on building secure, scalable Android applications using modern architectures and tools in a hybrid Krakow-based model. The position involves developing Kotlin applications with Jetpack Compose, integrating network services, and implementing CI/CD pipelines while ensuring high mobile security standards. You will collaborate in distributed teams to deliver robust digital mobile solutions. 🗂️ Requirements: Minimum 4 years of Android development experience in Kotlin, Strong knowledge of Android frameworks and libraries: Retrofit, Coroutines, Room, Hands-on experience with Android Lifecycle, ViewModel, LiveData, Experience with MVP, MVVM, Clean Architecture design patterns, Practical experience with CI/CD pipelines, Knowledge of secure data storage, SSL pinning, authentication mechanisms, Understanding of modularization and dependency management, Ability to troubleshoot production issues, Fluent English (spoken and written), Legal right to work in the European Union 📃 Skills: Kotlin, Android, Jetpack, Compose, Retrofit, Coroutines, Room, Lifecycle, ViewModel, LiveData, MVP, MVVM, CleanArchitecture, Koin, Dagger, Hilt, CI/CD, SSL, Flow 🏢 Description: Empower Mobile Innovation — Drive Secure and Seamless Digital Experiences! Krakow-based opportunity with hybrid work model. As a Mid-Level Kotlin Android Developer, you will be working on developing cutting-edge Android applications that enhance customer engagement and strengthen security measures. The role focuses on delivering robust, scalable mobile solutions in a rapidly evolving digital landscape. Quick Facts: - Hybrid work model based in Krakow - Fluent English required (spoken and written) - Only candidates with an existing legal right to work in the European Union will be considered Responsibilities: - Create and develop Android applications in Kotlin, using Jetpack Compose for modern UI design - Design and implement solutions following MVP and MVVM design patterns, ensuring modularity and maintainability - Integrate applications with network services using Retrofit, ensuring secure and reliable communication - Manage dependencies using Koin, Dagger, or Hilt - Build and maintain CI/CD pipelines to streamline deployment cycles - Apply best practices in mobile security, including encrypted data storage and secure network protocols - Diagnose and resolve application issues, including production incidents - Collaborate in distributed teams, participating in code reviews, retrospectives, and knowledge sharing Requirements: - Minimum of 4 years of experience developing Android applications in Kotlin - Strong proficiency with Android frameworks and libraries: Retrofit, Coroutines, Room - Hands-on experience with Android Lifecycle, ViewModel, and LiveData - Solid understanding of modularization principles and dependency management - Practical experience establishing and maintaining CI/CD pipelines - Familiarity with MVP, MVVM, and Clean Architecture - Knowledge of mobile security best practices: secure data storage, SSL pinning, authentication mechanisms - Ability to troubleshoot and resolve complex technical issues, including in production environments - Willingness to work in distributed teams and actively participate in code reviews Nice to Have: - Experience with Flow for asynchronous programming - Certifications related to Android development or cybersecurity

🏢 Summary: Android Developer role focused on building and evolving SumUp’s POS mobile application within the SuperApp ecosystem, with a strong emphasis on Kotlin Multiplatform strategy. The position involves developing new features, improving architecture, and ensuring scalable, high-quality solutions used across 60+ countries. You will collaborate cross-functionally and contribute to testing, documentation, and technical mentorship. 🗂️ Requirements: 3+ years of experience in mobile engineering with Android and Kotlin, 2+ years of experience with Jetpack Compose, Strong knowledge of software design patterns (MVVM, MVI), Experience building modular and scalable app architectures, Good knowledge of reactive programming (Flow, Coroutines, Concurrency), Strong understanding of testing best practices and writing resilient tests, Interest in Kotlin Multiplatform development 📃 Skills: Android, Kotlin, Jetpack, Compose, MVVM, MVI, Flow, Coroutines, Concurrency, Kotlin, Multiplatform 🏢 Description: About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our POS solution integrates seamlessly into the SumUp SuperApp, which supports both our proprietary register hardware and mobile devices like tablets and phones. As an Android Developer , you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. About the role We’re evolving toward a Kotlin Multiplatform (KMP) strategy, enabling shared development across Android and iOS. In this role, you’ll learn, refine, and help implement this technology, shaping the future of our mobile apps. You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment. What you’ll do Build new features for the item catalog within the SumUp SuperApp Help improve the architecture of the application and contribute to our Kotlin Multiplatform strategy Enhance and maintain our unified android app, distributed across 60+ countries, ensuring high-quality, scalable solutions Shape the product’s evolution by identifying opportunities for improvement and contributing to daily decision-making Write thorough documentation and implement robust testing for features before shipping Collaborate closely with Designer, Product Manager and Android engineers to deliver a unified UX experience across platforms Coach and mentor other engineers You’ll thrive in this role if: You have 3** + years of experience** in mobile engineering with Android and Kotlin. You have 2+ years of experience working with Jetpack Compose. You have a solid understanding of software design patterns (e.g., MVVM, MVI) and expertise in building modular, scalable app architectures. You have good knowledge of reactive programming (Flow, Coroutines and Concurrency). You have a strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests. You strive for clean code, and you are flexible to balance pragmatism and perfection. You have a keen interest in multi-platform development using Kotlin Multiplatform. Why you should join SumUp: 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrollment onto our VSOP program: you will own a stake in SumUp’s future success 🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw 🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind 💰 PPK (Employee Capital Plan): grow your savings with joint contributions from SumUp and the State. 🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

🏢 Summary: Android Developer role focused on building and evolving a Point-of-Sale SuperApp using Kotlin and Kotlin Multiplatform. The position involves developing new features, improving app architecture, and ensuring scalable, high-quality mobile solutions across Android and iOS. You will contribute to a shared multiplatform strategy while maintaining robust testing and clean architecture practices. 🗂️ Requirements: 3+ years of experience in Android development with Kotlin, 2+ years of experience with Jetpack Compose, Experience with MVVM or MVI architecture patterns, Experience building modular and scalable mobile architectures, Knowledge of reactive programming using Flow and Coroutines, Experience with concurrency in mobile applications, Strong understanding of testing practices in mobile development, Interest in Kotlin Multiplatform development 📃 Skills: Kotlin, Android, Jetpack, Compose, MVVM, MVI, Flow, Coroutines, Concurrency, KMP, Testing 🏢 Description: About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our POS solution integrates seamlessly into the SumUp SuperApp, which supports both our proprietary register hardware and mobile devices like tablets and phones. As an Android Developer , you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. About the role We’re evolving toward a Kotlin Multiplatform (KMP) strategy, enabling shared development across Android and iOS. In this role, you’ll learn, refine, and help implement this technology, shaping the future of our mobile apps. You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment. What you’ll do Build new features for the item catalog within the SumUp SuperApp Help improve the architecture of the application and contribute to our Kotlin Multiplatform strategy Enhance and maintain our unified android app, distributed across 60+ countries, ensuring high-quality, scalable solutions Shape the product’s evolution by identifying opportunities for improvement and contributing to daily decision-making Write thorough documentation and implement robust testing for features before shipping Collaborate closely with Designer, Product Manager and Android engineers to deliver a unified UX experience across platforms Coach and mentor other engineers You’ll thrive in this role if: You have 3** + years of experience** in mobile engineering with Android and Kotlin. You have 2+ years of experience working with Jetpack Compose. You have a solid understanding of software design patterns (e.g., MVVM, MVI) and expertise in building modular, scalable app architectures. You have good knowledge of reactive programming (Flow, Coroutines and Concurrency). You have a strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests. You strive for clean code, and you are flexible to balance pragmatism and perfection. You have a keen interest in multi-platform development using Kotlin Multiplatform. Why you should join SumUp: 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrollment onto our VSOP program: you will own a stake in SumUp’s future success 🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw 🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind 💰 PPK (Employee Capital Plan): grow your savings with joint contributions from SumUp and the State. 🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.