
Sumup · Warsaw
Salary range: 18 850 - 29 660 PLN per month About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses...
Salary range: 18 850 - 29 660 PLN per month
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 a Senior 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.
This role will be a B2B based role in Warsaw.
What you’ll do
architectures.
🌎 Opportunity to work , from our vibrant Warsaw office with inspiring art-filled lounges and a skyline terrace in the Mennica
Legacy Tower.
🌈 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
🚀 Enrolment 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
🏖️ 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
The stated salary range represents the expected compensation for candidates who meet the core requirements of this role. Offers
above this range may be considered in exceptional circumstances, subject to internal review and approval, where a candidate's
qualifications, skills, or experience significantly exceed the role's standard expectations.
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.
THIS IS ADYEN Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. SENIOR CI/CD ENGINEER Adyen is looking for an Infrastructure Developer for the In-Person-Payments Tooling team in Chicago. This role focuses on CI/CD Engineering, ensuring smooth and efficient software development and deployment processes, with a key area being Android / iOS development. You will be instrumental in creating and maintaining CI/CD systems and developing infrastructure tooling, essentially acting as the "glue" that binds code and infrastructure together. The position involves working on CI/CD for Android and iOS app development. The primary function is developing tools and applications to manage and interact with the Software Development Lifecycle (SDLC) to provide an elevated SDLC experience for the organization. This work involves close collaboration with developers, as well as teams building our on-premises infrastructure, including Kubernetes clusters, the Hashicorp stack, and our private cloud. You will be pivotal in ensuring our software development and deployment processes are smooth and efficient by creating and maintaining CI/CD systems and developing infrastructure tooling. WHAT YOU’LL DO * Design and implement CI/CD pipelines for Android and iOS applications using tools like GitLab CI, Gradle, KMP, Develocity and Android Native Plugin. * Automate build processes for multiple build variants, flavors, and configurations * Configure build caching and optimization to reduce build times * Configure code quality checks, static analysis, and security scanning * Configure emulators and device farms for automated testing * Integrate monitoring and alerting for tooling health * Set up automated testing frameworks including unit tests, integration tests, and UI tests WHO YOU ARE You are a DevOps or Infrastructure Engineer with a passion for mobile development. You enjoy figuring out "how things work" under the hood and are eager to bridge the gap between writing code and deploying it. You don’t just want to build apps; you want to build the engines that power them. * 5+ years of experience in DevOps or Infrastructure Engineering. * An Analytical Problem Solver: You have a logical approach to troubleshooting and aren't afraid to dive into build logs to find a failing root cause. * Mobile Enthusiast: You have a foundational understanding of either Android (Gradle/Kotlin) or iOS (Xcode/Swift) and are excited to become an expert in both. * Automation Mindset: You find manual, repetitive tasks frustrating and have a natural urge to script them away using Python, Bash, or Kotlin Script. * Autonomous yet Collaborative: You are comfortable working independently on complex tasks but stay in sync with a team of other dedicated engineers. * Quality Focused: You understand that a good CI/CD pipeline is the first line of defense for code quality and stability. NICE TO HAVE * Advanced Linux & Systems Admin: Proficiency in Linux troubleshooting (understanding inodes, process management, and resource allocation). * Infrastructure as Code (IaC): Familiarity with tools like Terraform or Puppet. * Alternative CI Tooling: While Gitlab CI is preferred, experience with Jenkins, GitHub Actions, or Bitrise is highly valued. * Advanced Testing & Monitoring: Experience configuring device farms/emulators for automated testing and integrating monitoring/alerting for tooling health. * Specific Android Tools: Familiarity with KMP (Kotlin Multiplatform), Develocity, and specialized testing tools like Screenshot testing or Detekt. * iOS Ecosystem: Familiarity with Xcode CLI (xcodebuild). The annual base salary range for this role is $180,000 - $243,000; at the Engineer II level, and $180,000 - $243,000 at the Senior Engineer level; to learn more about our compensation philosophy, please click here. OUR DIVERSITY, EQUITY AND INCLUSION COMMITMENTS Our unique approach is a product of our diverse perspectives. This diversity of backgrounds and cultures is essential in helping us maintain our momentum. Our business and technical challenges are unique, and we need as many different voices as possible to join us in solving them - voices like yours. No matter who you are or where you’re from, we welcome you to be your true self at Adyen. Studies show that women and members of underrepresented communities apply for jobs only if they meet 100% of the qualifications. Does this sound like you? If so, Adyen encourages you to reconsider and apply. We look forward to your application! WHAT’S NEXT? Ensuring a smooth and enjoyable candidate experience is critical for us. We aim to get back to you regarding your application within 5 business days. Our interview process tends to take about 4 weeks to complete, but may fluctuate depending on the role. Learn more about our hiring process here. Don’t be afraid to let us know if you need more flexibility. Adyen is an equal opportunity employer. We do not discriminate based on race, color, ethnicity, ancestry, national origin, religion, sex, gender, gender identity, gender expression, sexual orientation, age, disability, veteran status, genetic information, marital status or any legally protected status. All your information will be kept confidential according to EEO guidelines. This role is based out of our Chicago office. We are an office-first company and value in-person collaboration; we do not offer remote-only roles. This role is hybrid, with 3 days per week in the office.
What will you do? As a Senior Android Engineer at Rebtel, you will be part of our Frontend team, helping modernize and evolve the Rebtel Android app. We are in the middle of migrating from Java to Kotlin and Jetpack Compose while continuously shipping product features to a global user base. You’ll work in a small, empowered team where your technical decisions matter. This role is a mix of building new features, refactoring legacy code, collaborating cross-functionally, and shaping the future of our Android platform. Areas of ownership: Drive the migration from Java to a modern Kotlin + Compose stack Refactor code that slows us down and proactively pay down tech debt Build and modernize Android features using Kotlin and Jetpack Compose Contribute to architecture decisions (MVVM/MVI, Coroutines, platform improvements) Collaborate closely with iOS, Web, Product, Design, and QA to ship the right solutions Improve tooling, testing practices, and CI/CD where needed Maintain and improve the overall health of the Android platform Requirements: You are an excellent communicator and collaborator. We work in English, but you will hear many languages in our Stockholm office 5+ years of experience building Android applications Strong knowledge of Kotlin (and solid Java understanding) Experience with modern Android architecture (Jetpack Compose, Coroutines, MVVM/MVI) Proven ability to work independently and ship high-quality code You are an excellent communicator and collaborator. We work in English, but you will hear many languages in our Stockholm office You care about the code you leave behind — you ship features without cutting corners You prefer simple, pragmatic solutions over clever complexity Experience migrating legacy Android codebases to modern stacks Experience with mobile CI/CD, testing, or DevOps practices is a plus It's a plus with experience with collaborating across platforms (iOS/Web) Why Rebtel? When you join Rebtel, you become part of a global team, bringing together diverse minds from every corner of the world. Our headquarter is nestled in Stockholm and here we strike a balance between dedicated work and more relaxed activities. Every Friday the unmistakable aroma of freshly popped popcorn fills the air, but our celebrations encompass everything from minor and major common accomplishments to cinnamon bun day. At Rebtel, you are the most important asset and we strive to provide a comprehensive package of benefits and perks that enhance your well-being and work experience. Here are some of the things you can expect from us: Pension Plan Health Checkups, Influenza shots and Private Medical Insurance Dental Insurance Occupational insurance Wellness allowance (5,000 SEK) Discount on gym memberships Bonus program Extra parental pay 30 days annual vacation Monday breakfasts Relocation Support, if you're joining us from afar, we'll assist you in making a smooth transition. Rebtel is an international workplace, and at the office, we speak English; therefore, high English proficiency is required. We are committed to being an LGBTQIA+ safe workplace, a place where individuals can be open about who they are without fear of discrimination or harassment. We are Rebtel. We come from all around the world to create products for anyone who has crossed a border. We believe in equal opportunity and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
We are looking for an experienced Android Engineer for a customer in Stockholm for a fixed period assignment. Responsibilities ● Design, develop, and maintain the release of the Android app on the main Stores ● Collaborate with cross-functional teams to define, design, and ship new features ● Ensure the performance, quality, and responsiveness of the app ● Debug complex technical issues and identify solutions to improve the app ● Stay up-to-date with new technologies and trends in Android development ● Write clean, maintainable, and scalable code ● Participate in code reviews and ensure adherence to coding standards ● Contribute to the technical design and architecture of the app ● Participate in the full software development life cycle, including planning, development, testing, and deployment. Essential skills and experience (must have) ● 5+ years of overall experience with Android development ● Advanced knowledge of programming using Kotlin ● Deep understanding and several years of hands-on experience in Android application development (architectures, design, tools, SDKs), asynchronous server communication, and UX optimization ● Experience in debugging and troubleshooting complex systems ● Leading, planning, and executing the development of core features and modules for Android applications ● Ability to navigate and research requirements in the scope of a big cross-functional team ● Ability to dive into complicated, unique problems, find a clear path forward, and drive the work to a successful conclusion. ● Experience in agile development ● Fluent English skills, oral and written Good to have skills ● Experience with automation testing ● Experience with in-house device farm ● Familiarity with automation tools like GitHub Actions and Fastlane ● Experience with mentoring and onboarding junior team members This is an onsite opportunity with the client and 5 days work from office in Stockholm. Those interested can apply to : careers@hybrus.se