Wallapop is a Barcelona based scale\-up driven by the purpose to empower people to embrace a more conscious and human way of consumption. We believe in a world where collaborative economy is mainstream. This is what drives us. Wallapop operates in Spain, Italy and Portugal, offering a catalogue of several hundreds of millions of products and services. Powered by technical innovation and continuous improvement, we bring together the scale \& trust of classifieds with the marketplace's convenience \& reach. Our mission is to enable a connected trade ecosystem, making 2nd\-hand the norm through smart use of technology. Backed by top investors such as Accel, Insight Partners \& Naver Corp we bring our total valuation to 806 million EUR and are embarking on our international journey with the aim to become the world's best unique goods trading platform. **The Challenge** You will join the **Android Platform Team**, the engine room that enables our mobile engineers to ship features to millions of users with speed and confidence. In a 10\+ year\-old codebase with 50\+ modules, your mission is to eliminate friction and build the foundation of our mobile future. **What you will find:** * **Developer Experience (DevEx) at Scale:** You won't just build features; you will build the tools, CI/CD pipelines, and architectures that other engineers use daily. * **Deep Tooling \& Build Systems:** We manage a complex modular environment where **Gradle** and **CI/CD automation** are at the heart of everything we do. * **System\-Level Thinking:** From optimizing build time to managing our **Dagger/Anvil** DI graph, you'll tackle challenges that impact the entire Android Chapter. * **Data\-Driven Infrastructure:** We don't guess; we measure. You will use metrics to identify bottlenecks in the development lifecycle and prioritize what to fix next. **What You Will Do** You'll be the "Engineer for the Engineers," driving technical excellence across the organization. To do so, you will: * **Master the Build System:** Maintain and optimize our **Gradle** configuration, plugins, and build logic to ensure fast and reliable builds. * **Optimize the Feedback Loop:** Improve **CI/CD pipelines** and local iteration speed to ensure developers can test and deploy code faster. * **Own the Release Engine:** Maintain and evolve our **automated release process**, ensuring that shipping to millions of users is a non\-event. * **Standardize \& Modernize:** Help define the "Golden Path" for Android development, providing the modular architecture and patterns that teams need to succeed. * **Cross\-Platform Collaboration:** Work alongside iOS and Web Platform engineers to align on tooling, infrastructure, and DevOps culture. * **Infrastructure as Code:** Manage and scale our cloud resources (using **AWS** when needed) to support our mobile infrastructure. **What We're Looking For** * **Android Enthusiast \& Expert:** Deep knowledge of the Android SDK and Kotlin. You don't just use libraries; you understand how the system works under the hood. * **Build System Mastery:** Extensive experience with **Gradle** (writing custom plugins, optimizing build scripts, and understanding the configuration phase). * **The "Platform" Mindset:** A passion for **Developer Experience (DevEx)**—you find joy in making your colleagues' lives easier and their builds faster. * **Performance \& Stability:** Experience using profilers and monitoring tools to debug complex issues like memory leaks, ANRs, or slow startup times. * **Modularization at Scale:** Proven experience managing large\-scale, multi\-module projects and understanding the trade\-offs of different architectural patterns. * **CI/CD \& Automation:** Solid experience with CI tools (GitHub Actions, Bitrise, etc.) and a pragmatic approach to automating the full release lifecycle. * **Polyglot Curiosity:** Comfortable using **Python** for scripting and an interest in learning **AWS** infrastructure when needed. **What Would Be A Plus** * Experience with **Gradle Enterprise** (Develocity) or writing custom Gradle plugins. * Knowledge of **Infrastructure as Code (IaC)** or basic AWS management. * Previous experience in a **Developer Experience (DevEx)** or Mobile Infra role. * Experience managing **Design Systems** from an infrastructure perspective (theming engines, token automation). Do note that all our jobs are Barcelona based. We follow a hybrid model where flexibility rules. We commit to a minimum of 6 days per month in the office. Each team self\-organizes to decide on cadence and in\-person/remote rituals. Wallapop is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees as we want Wallapop to be a place for everyone. We sponsor visa processes for international candidates when applicable and provide legal \& admin support along the process combined with a competitive relocation package. Additionally to the opportunity to contribute to an agile product set up and work together towards achieving our meaningful mission, we offer the following **Perks \& Benefits**: * Generous individual learning budget of 2k per year * Group and individual English, Catalan \& Spanish lessons as part of our working day * Private Health Insurance with Alan * Flexible working hours \+ short Fridays * Flexible remuneration to deduct from gross salary (kindergarten/food/transport check) * Gym \& Wellness plan, including physiotherapist in the office * Generous referral Program \& Charity Donation * Bonus for weddings \& newborns * Wallapop Renta (Tax income support) * Monthly plan for free shipping, bumps \& home\-pick\-up on our services * Work anniversary Gifts and Birthday Surprises * Contribution towards your WIFI in your monthly payroll * One\-off payment based on compensation package to go towards setting up your home office * Relocation package (monetary support and legal advice) and visa sponsorship, if applicable * 26 holidays per year * TOP hardware of your choice (latest Apple or Windows) What does **the hiring process** for this position look like? *\*\*Please, note that all interviews take place remotely over hangouts.\*\** * **Intro Call** \- run by Talent Acquisition, focus on providing more information about the role and the company as well as going over your experience, motivation, and expectations. This usually takes 45\-60 minutes. * **Technical Task** \- you will be assigned a test that consists of a coding challenge to assess the technical skills required for the role. You will have up to 7 days to complete it. If you have a recent project that meets the same requirements, you can submit it instead. * **Expertise Interview** \- run by the core team, focusing on the hard skills and the ability to deliver in a given context. This usually takes 60\-90 minutes. * **Stakeholder Interview** \- run by the hiring team and relevant stakeholders, focus on the ability to collaborate \& deliver in a cross\-functional set\-up. This usually takes 60 minutes. * **Culture Interview** \- run by culture interviewers, focus on adherence to Wallapop's purpose and business proposition. This usually takes 60 minutes. * **Offer** \- should you be the right candidate, your offer will be discussed over a call with talent acquisition and will then be confirmed in writing.