IOS STAFF ENGINEER, BARCELONA

iOS Staff Engineer
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 marketplaces 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 worlds best unique goods trading platform.

The Challenge

Were evolving a 10+ year-old codebase with over 18 iOS engineers contributing daily, balancing legacy challenges with modern architecture and tooling. Our tech stack includes:
- A custom, TCA-inspired architecture powered by RxSwift
- Internal dependency injection system
- A robust testing culture with snapshot-based integration tests
- Modern UIKit and expanding SwiftUI adoption
- Data persistence with Realm and CoreData
- Tools for performance monitoring and analytics
- Testing frameworks like Quick/Nimble and Snapshot Testing

What You Will Do

Youll drive high-quality product experiences while helping the team grow, you will:
- Contribute hands-on while being accountable for cross-team delivery, ensuring initiatives are aligned with both technical best practices and product goals
- Collaborate with design, product and engineering leadership to frame and deliver scalable, high-quality solutions
- Act as a technical reference within your tribe, supporting consistent implementation across teams
- Coordinate with other platforms to ensure a cohesive, cross-platform experience
- Help improve our architecture, tooling, and performance practices
- Mentor peers through code reviews, pairing, and knowledge sharing
- Apply a product-first mindset, balancing user value with technical excellence

What Were Looking For
- Strong hands-on experience with Swift and iOS development
- Ability to balance technical trade-offs with product impact
- Solid understanding of architecture principles and code quality standards
- Experience in collaborative, multi-team codebases
- Familiarity with RxSwift or other reactive programming paradigms
- Strong collaboration and communication skills
- Comfortable working cross-functionally in a fast-evolving environment

What Would Be A Plus
- Experience with SwiftUI in production environments
- Background in modular architectures
- Interest in the product lifecycle and how engineering shapes the user experience

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:
- Competitive phantom shares package for all employees
- 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 + intensive 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)

Swift, ios,

Swift, ios,