Android Engineer - Kotlin (m/f/d)

voize

🎤 WHY VOIZE? BECAUSE WE’RE MORE THAN JUST A JOB! At voize, we believe the greatest gift to frontline workers is time - time to care, connect, and be present. Today, that time is lost to busywork and complex systems that pull them away from what matters most: people. Our vision is to change that by building AI companions that seamlessly take over digital workflows. We don't replace humans with technology - we amplify their impact. Our mission is backed with a $50M Series A funding led by Balderton Capital, with support from HV Capital, Y Combinator and other leading VCs. Today, 2,000+ facilities trust voize, and over 200,000 users rely on our AI companion to ease their daily workload. As a dynamic team, we combine first-in-class technology with meaningful social impact. And now, we’re looking for you to join us on this mission! 💡 YOUR MISSION * Take full ownership of the development and technical implementation of our Android apps (Kotlin & Jetpack Compose) * Build features that genuinely make users’ lives easier, taking them from idea to launch * Work closely with the product and engineering team to turn requirements into creative and efficient solutions * Be involved in the entire development cycle: from concept and testing to user feedback 🤝 YOUR SKILLSET – WHAT YOU BRING TO THE TABLE * Several years of experience in Android development with Kotlin and Compose * Good knowledge of Git, CI/CD processes, and testing * A keen eye for intuitive and user-friendly interfaces * Deep understanding of Flow lifecycle and Operators * You speak French on a Business fluent C2 / Bilingual level 🌱 GROWING TOGETHER – WHAT YOU CAN EXPECT AT VOIZE * We are a fast-growing startup, that means you will tackle challenges, grow quickly, and make a real impact, giving healthcare professionals more time for real patient care * We foster an open, collaborative culture with regular team events, whether you work from our Berlin office or remotely from Germany * Become a co-creator of our success with stock options * Generous perks: 30 vacation days plus your birthday off, Germany Transport Ticket, Urban Sports Club, regular company off-sites, and access to learning platforms such as Blinkist and Audible * You decide when you work best, that means flexible working hours and a good hybrid set-up. ✨ READY TO TALK? APPLY NOW! 🚀 We look forward to your application and can’t wait to meet you – no matter who you are or what background you have!

Sumup

About the role As an Android Engineer in SumUp's Hardware Tribe, you will be part of one of our small and highly skilled cross-functional teams and work together with Product Managers, Backend Engineers, iOS Engineers, Product Designers, and more. You will also be part of and collaborate on a global level with the broader Mobile chapter. You will deal with a variety of topics ranging from improving reliability of Bluetooth implementation within the Android SumUp app and the SumUp SDK, to implementing user-facing features such as screens to interact with card readers, to collaborating on developing technical roadmaps. You should be a mobile engineer with a product mindset who can fully own the features you are working on and remain flexible with changing priorities. The role is based on-site in our office in Berlin. We believe in the power of face-to-face conversations that happen organically when working next to one another. About the team You have probably used our card readers to buy a cappuccino or pay your hairdresser already. In Hardware, we are passionate about creating these beautifully designed card payment devices and accessories that enable our merchants to start, run, and grow their own businesses. In doing so, we deal with a diverse range of engineering topics - industrial and electronic design, embedded systems, all the way to mobile apps and backend services. We believe in open communication and constant learning over strict rules. If you're looking for the chance to innovate and help millions of small independent merchants succeed - join us! What you’ll do * Ship a variety of payment-related features and services within our Android ecosystem, supporting both our SDKs and the SuperApp * Refactor and enhance existing solutions (including Bluetooth Low Energy connections, online/offline payments, and tap-to-pay functionality), and generally improve reliability and performance * Work closely with the rest of the team to drive our roadmap and design our developer experience You'll be great for this position if: * You're comfortable with Kotlin, Java, and Android framework * You have good knowledge of architectural design patterns such as MVVM and MVI, and experience ensuring modularized and scalable app architecture * You know what to test, why to test it, and how to write flexible tests that won't break * You care about user interaction, usability, and have attention to detail * You strive for clean code, but also know how to be pragmatic when needed Why you should join SumUp * The opportunity to work on large scale fintech products used by millions of small businesses around the world * A dedicated annual Learning & Development budget for attending conferences and/or advancing your career through further education * Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success * A corporate pension scheme  * 28 days paid leave + 1 for birthday  * You’ll attend global offsites and/or hackathons. * You'd enjoy other great benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidized office lunches and other location-tailored benefits, Babbel language platform subscription and more! 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.

Trading 212

Our mission is to enable everyone to build wealth We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Today, we serve over 5 million clients, with more than €30 billion in assets under management - a testament to the scale and trust we’ve built in just a few years.   WHAT YOU’LL DO * Own and evolve our monorepo, ensuring it stays healthy, performant, and easy to work in as the codebase grows * Design, build, and maintain CI/CD pipelines for React Native and web targets, driving reliability and fast feedback loops for the engineering team * Author and maintain shared TypeScript libraries — state management patterns, networking layers, error handling utilities — consumed across all frontend products * Own the mobile release process end-to-end, including Android build configuration, versioning, and deployment automation * Integrate and maintain observability tooling (Sentry, Amplitude) at the platform level, so product teams get reliable instrumentation out of the box * Identify and resolve build bottlenecks, dependency issues, and tooling gaps that slow down engineering velocity * Collaborate closely with product frontend teams to understand their pain points and translate them into platform improvements   WHAT YOU NEED TO HAVE * At least 4 years of professional experience in frontend or mobile engineering, with a meaningful portion spent on platform, infrastructure, or developer tooling work * Production-grade TypeScript - strong typing discipline, not just familiarity * Hands-on React Native experience in a production app, including an understanding of the native layer * Practical Kotlin experience on Android - native modules, build configuration, or Android-side CI/CD work * Direct involvement in CI/CD pipeline ownership or significant contribution — mobile or frontend, any tooling * Ability to think in systems and write code for other engineers, not just end users * Comfortable working autonomously and making decisions without waiting for full consensus   NICE TO HAVE (OPTIONAL) * Hands-on experience with nx or pnpm workspaces specifically * Familiarity with Vite and Expo for tooling or build configuration * Exposure to Reanimated or React Native Gesture Handler * Background in fintech or a high-scale consumer app where release reliability was business-critical   WHAT WE OFFER * Challenges that will help you grow and realise your potential * Opportunity to make a big Impact - you will build innovative services used by millions of investors to build wealth * Work with smart, spirited, helpful, high-performing colleagues with a common goal * An environment where nothing is set in stone * Appreciation for your talent and ideas * Generous remuneration package including annual bonuses * Excellent social benefits package, including private health insurance, sports card and 25 days of paid vacation per year * Delicious treats and a spacious game room Are you ready to accelerate your career with us? We'd love to hear from you! We process applicant data confidentially and in accordance with applicable data protection laws. We may use AI-powered tools to help review applications, but all hiring decisions are made by our human recruitment team. Where required by law, we rely on your consent to use these tools. You may withdraw this consent or exercise your data protection rights at any time by contacting us.