ð«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. ð Our mission is to enable a connected trade ecosystem, making 2nd-hand the norm through smart use of technology.The Challenge ð§You will join the iOS Platform team, the team that sets the technical direction for iOS at Wallapop. Our users are primarily other engineers, and our mission is to supercharge their daily productivity while defending the quality and performance of our app. We own the build system, developer tooling, module architecture, testing infrastructure, and observability foundations that everyone else ships on top of.We work on a 10+ year-old codebase used by millions of people (~115 modules and over 20,000 Swift files), where every second shaved off a build is multiplied across the entire engineering chapter.In this role, you will own app performance as a product metric—from launch time and responsiveness to memory footprint and app size. As an iOS Platform Engineer, you will have company-wide scope, acting as an architect, mentoring engineers across the chapter, and tackling our most complex technical challenges.Bazel-based build system with remote caching/execution, paired with Tente (our in-house Go CLI and BSP server to support IDEs like VSCode, Neovim).CI/CD &

• Testing: High-scale pipelines on Bitrise, a robust testing pyramid featuring Quick/Nimble, ~9,000 snapshot references, and Maestro E2E flows in the cloud.Architecture &

• UI: Simplified, TCA-inspired architecture built on RxSwift, custom dependency injection, UIKit, SwiftUI, and our Conchita design system.Observability &

• AI: Deep tracing via Sentry and OpenTelemetry, automated PR quality gates, and AI-assisted workflows (AI code-review bot and repo-native agents).Build developer tooling that engineers actually enjoy using, and measure whether it moves the needle on daily productivity.Define, measure, and deliver on user-facing performance goals: app launch time,



responsiveness, rendering smoothness, memory footprint, and crash-free rate.Own the observability stack (Sentry/OpenTelemetry) to provide tracing and dashboards that engineers trust, and set up automated guardrails in CI to block regressions.Design and lead our structural architectural evolution, including the transition from RxSwift toward modern Swift Concurrency (async/await, actors, Sendable).Drive technical decisions with chapter-wide impact through RFCs and hands-on prototypes, aligning product, design, and backend stakeholders.Mentor iOS engineers across the company, raising the technical ceiling of the entire engineering chapter.What We’re Looking For ðExtensive experience designing, developing, and scaling iOS applications in Swift.Deep, hands-on experience with mobile performance profiling (Instruments) and a strong understanding of what makes an app fast and stable.Excellent communication and mentoring skills, with experience writing RFCs and guiding broader engineering chapters.Familiarity with AI coding assistants (e.g., Claude Code, GitHub Copilot) and using AI to enhance development workflows.What Would Be A Plus ðExperience with Bazel (including remote caching/execution) or other non-Xcode build systems for Apple platforms.Scripting beyond Swift (Go, Python, Ruby, shell) and a knack for writing custom CLIs.Experience with automated testing frameworks, snapshot testing, E2E frameworks, and flaky test triage at scale.Familiarity with AI coding assistants (e.g., Claude Code, GitHub Copilot) and adopting or developing harness engineering practices to make them reliable in a large codebase.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.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 ð Perks &

• Benefits:Generous individual learning budget of 2k per yearFree office meals, lunch selection from different providersGroup and individual English, Catalan &

• Spanish lessons as part of our working dayPrivate Health Insurance with AlanFlexible working hours + intensive FridaysFlexible remuneration to deduct from gross salary (kindergarten/food/transport check)Gym &

• Wellness plan, including physiotherapist in the officeGenerous referral Program &

• Charity DonationBonus for weddings & newbornsWallapop Renta (Tax income support)Monthly plan for free shipping, bumps & home-pick-up on our servicesWork anniversary Gifts and Birthday SurprisesContribution towards your WIFI in your monthly payrollOne-off payment based on compensation package to go towards setting up your home officeRelocation package (monetary support and legal advice) and visa sponsorship, if applicable26 holidays per yearTOP hardware of your choice (latest Apple or Windows)What does the hiring process for this position look like? ð 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.

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.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.

📌 Work from home ios developer (Cataluña)
🏢 Wallapop
📍 Cataluña