Android Engineer - Platform

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.

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.

• Developer Experience (Dev Ex) 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.

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 Dev Ops culture.
• Infrastructure as Code: Manage and scale our cloud resources (using AWS when needed) to support our mobile infrastructure.

• 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 (Dev Ex)—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 (Git Hub 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.

• 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 (Dev Ex) or Mobile Infra role.
• Experience managing Design Systems from an infrastructure perspective (theming engines, token automation).

Do note that all our jobs are 📍…