Android Engineer

Sumup

Salary range: 15 000 - 20 100 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 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  * 🏖️ 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   *Disclaimer 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.

Stripe

WHO WE ARE ABOUT STRIPE Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world’s largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone’s reach while doing the most important work of your career. ABOUT THE TEAM Stripe Terminal helps our users extend their online presence to the physical world. The Terminal team’s mission is to make it as easy for businesses to accept in-person payments as the Stripe API has done for online payments. Stripe was founded to make it easier for developers to accept payments. We’ve solved a small part of that problem, but our ambition is to go much further.  WHAT YOU’LL DO * You'll build and enhance applications, services, and the OS that run on the physical Terminal devices.  * You'll also build the frameworks for other engineers, both internal and external to Stripe, to develop on our custom platform with ease. RESPONSIBILITIES * Design, build, and maintain Android apps and SDKs in Kotlin * Develop Android payment applications for a variety of devices and form factors * Work with engineers, product managers, designers, and stakeholders across the company to bring new features and products to mobile users * Collaborate with Android developers who work on the Stripe mobile apps and Stripe Terminal to set best practices for Android development across the company * Work with user research and product design to understand users and address their needs  Who you are We’re looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement. MINIMUM REQUIREMENTS * 2+ years of experience in Android development * Experience working with at least one of the following- Kotlin, Java, Swift, Objective-C, Go, or Python PREFERRED QUALIFICATIONS * Payments expertise or knowledge * Backend infrastructure or services experience * Listen well and internalize the best ideas from all over the organization while also setting a vision that others are excited to get behind * You prefer simple solutions and designs over complex ones, and have a good intuition for what is lasting and scalable * Thrive in a collaborative environment involving different stakeholders and subject matter experts * Put yourself in the shoes of your users and be a steward of crafting great developer and consumer experiences

Truecaller

Join Truecaller – The place where innovation meets impact! Truecaller's mission is to build trust in communication by making it safer, smarter, and more efficient. Born in Sweden, trusted by the world, and here’s why we stand out: * We are trusted by over 450 million active users every month across 190+ countries * We identify over 15 billion calls daily, helping users avoid spam and scams * We are powered by a team of 450+ employees from 45+ nationalities We always look for people who take initiative, own their work, and keep raising the bar. An entrepreneurial mindset matters here, especially when it turns bold ideas into real actions. We stay collaborative and focused, always searching for smarter paths forward. If you want to make an impact and grow with a team that inspires millions, you’ll fit right in. The role: As a Software Engineer Android, you will design, build, and maintain the foundational components that every feature in our app relies on. You’ll be responsible for architecture, code quality, and delivery cadence for the platform capabilities we develop, including areas such as networking, app architecture, performance, developer tooling, and shared libraries. You will take part in technical discussions across the organization, helping shape the long-term technical direction of our Android platform. What you will do * Write code with great code standards * Deliver complex features on both front-end intensive tasks and performance improvements on the existing code base * Cover the code implementations with tests and improve the code coverage * Participate in code reviews and technical design discussions * Bring engineering experience to advise product and business teams to make better decisions  * Mentor the junior developers and take ownership of maintaining high engineering standards and a growth mindset in the team.  * Be the point of contact and liaise with the release team on the continuous delivery of high-quality code and the timely resolution of bugs What you bring in * 3+ years of experience in Android development * Strong knowledge of the Android SDK * Familiarity with RESTful APIs * Sound knowledge of Kotlin and Java programming languages * Proficient understanding of code versioning tools, such as Git * Experience with SQL databases * Excellent debugging skills  * Fluent in English, in speaking and writing * Experience in working with Agile methodologies It would be great if you also have * Familiarity with other mobile operating systems, like iOS * Firebase tools such as remote config * AB testing, Crashlytics, and user acquisition tools such as Appsflyer * CRM tools such as Clevertap What we offer:  We support growth through learning resources, leadership programs, mentoring, and real hands-on work. People can move between teams and projects to build new skills and keep things interesting. We offer clear internal mobility and a transparent path for progression, with leaders who stay involved and provide guidance throughout the year. In addition, you will benefit from:                                                                                                                                                         * A comprehensive compensation package: We offer a competitive salary, 30 days of paid vacation, private health insurance, parental leave top-up, pension, and wellness contributions. * Modern tools to do your best work: Choose your preferred computer and phone within our budget, so you can work comfortably and efficiently. * A people-focused office culture: We value in-person collaboration and follow an office-first model, with some flexibility. Our offices offer a vibrant environment with opportunities to learn, connect, and recharge, from breakfast, lunch, and well-stocked snack stations and quiet spaces to team activities such as movie nights, tech meetups, and cultural events. There's something for everyone. * Truecaller’s “Lab Days” offer a space for imagination: 5 times per year for 3 days, where everyone steps away from their normal tasks to explore new, bold ideas and build things they’ve always wanted to. It’s a space where curiosity leads the way, and prototypes take shape. Some concepts even make it into production, and a few have grown into real features used by millions today. Lab Days allow you to be creative, learn fast, and help shape Truecaller's future. Come as you are: Truecaller is committed to building a diverse and inclusive team. We believe that a wide range of backgrounds, perspectives, and experiences strengthens our products and our culture. No matter where you're from, what language you speak, or how you identify,  we value what makes you unique and would love to get to know you.  Check out Life at Truecaller - Behind the code:  https://www.instagram.com/lifeattruecaller/ Sounds like a great opportunity? We will fill the position as soon as we find the right candidate, so please send your application as soon as possible. As part of the recruitment process, we will conduct a background check. We only accept applications in English.